US20140005718A1 - Multi-functional powered surgical device with external dissection features - Google Patents
Multi-functional powered surgical device with external dissection features Download PDFInfo
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- US20140005718A1 US20140005718A1 US13/536,288 US201213536288A US2014005718A1 US 20140005718 A1 US20140005718 A1 US 20140005718A1 US 201213536288 A US201213536288 A US 201213536288A US 2014005718 A1 US2014005718 A1 US 2014005718A1
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- end effector
- drive
- rotary drive
- jaw member
- jaw
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- A61B17/32002—Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes with continuously rotating, oscillating or reciprocating cutting instruments
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- A61B2018/1452—Probes having pivoting end effectors, e.g. forceps including means for cutting
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
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- Medical Informatics (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Robotics (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Otolaryngology (AREA)
- Surgical Instruments (AREA)
- Manipulator (AREA)
Abstract
Description
- Over the years a variety of minimally invasive robotic (or “telesurgical”) systems have been developed to increase surgical dexterity as well as to permit a surgeon to operate on a patient in an intuitive manner. Many of such systems are disclosed in the following U.S. patents which are each herein incorporated by reference in their respective entirety: U.S. Pat. No. 5,792,135, entitled “Articulated Surgical Instrument For Performing Minimally Invasive Surgery With Enhanced Dexterity and Sensitivity”, U.S. Pat. No. 6,231,565, entitled “Robotic Arm DLUS For Performing Surgical Tasks”, U.S. Pat. No. 6,783,524, entitled “Robotic Surgical Tool With Ultrasound Cauterizing and Cutting Instrument”, U.S. Pat. No. 6,364,888, entitled “Alignment of Master and Slave In a Minimally Invasive Surgical Apparatus”, U.S. Pat. No. 7,524,320, entitled “Mechanical Actuator Interface System For Robotic Surgical Tools”, U.S. Pat. No. 7,691,098, entitled Platform Link Wrist Mechanism”, U.S. Pat. No. 7,806,891, entitled “Repositioning and Reorientation of Master/Slave Relationship in Minimally Invasive Telesurgery”, and U.S. Pat. No. 7,824,401, entitled “Surgical Tool With Writed Monopolar Electrosurgical End Effectors”. Many of such systems, however, have in the past been unable to generate the magnitude of forces required to effectively cut and fasten tissue. In addition, existing robotic surgical systems are limited in the number of different types of surgical devices that they may operate.
- The features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention itself will be better understood by reference to the following description of example embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
- Various example embodiments are described herein by way of example in conjunction with the following FIGS. wherein:
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FIG. 1 is a perspective view of one embodiment of a robotic controller. -
FIG. 2 is a perspective view of a robotic surgical arm cart/manipulator of a robotic system operably supporting a plurality of surgical tool embodiments. -
FIG. 3 is a side view of one embodiment of the robotic surgical arm cart/manipulator depicted inFIG. 2 . -
FIG. 4 is a perspective view of a cart structure with positioning linkages for operably supporting robotic manipulators that may be used with surgical tool embodiments. -
FIG. 5 is a perspective view of a surgical tool embodiment and a surgical end effector embodiment. -
FIG. 6 is a perspective view of one embodiment of an electrosurgical tool in electrical communication with a generator -
FIG. 7 shows a perspective view of one embodiment of the end effector of the surgical tool ofFIG. 6 with the jaw members open and the distal end of an axially movable member in a retracted position. -
FIG. 8 shows a perspective view of one embodiment of the end effector of the surgical tool ofFIG. 6 with the jaw members closed and the distal end of an axially movable member in a partially advanced position. -
FIG. 9 is a perspective view of one embodiment of the axially moveable member of the surgical tool ofFIG. 6 . -
FIG. 10 is a section view of one embodiment of the electrosurgical end effector of the surgical tool ofFIG. 6 . -
FIG. 11 is an exploded assembly view of one embodiment of an adapter and tool holder arrangement for attaching various surgical tool embodiments to a robotic system. -
FIG. 12 is a side view of one embodiment of the adapter shown inFIG. 11 . -
FIG. 13 is a bottom view of one embodiment of the adapter shown inFIG. 11 . -
FIG. 14 is a top view of one embodiment of the adapter ofFIGS. 11 and 12 . -
FIG. 15 is a partial bottom perspective view of one embodiment of a surgical tool. -
FIG. 16 is a front perspective view of one embodiment of a portion of a surgical tool with some elements thereof omitted for clarity. -
FIG. 17 is a rear perspective view of one embodiment of the surgical tool ofFIG. 16 . -
FIG. 18 is a top view of one embodiment of the surgical tool ofFIGS. 16 and 17 . -
FIG. 19 is a partial top view of one embodiment of the surgical tool ofFIGS. 16-18 with the manually actuatable drive gear in an unactuated position. -
FIG. 20 is another partial top view of one embodiment of the surgical tool ofFIGS. 16-19 with the manually actuatable drive gear in an initially actuated position. -
FIG. 21 is another partial top view of one embodiment of the surgical tool ofFIGS. 16-20 with the manually actuatable drive gear in an actuated position. -
FIG. 22 is a rear perspective view of another surgical tool embodiment. -
FIG. 23 is a side elevational view of one embodiment of the surgical tool ofFIG. 22 . -
FIG. 24 is a cross-sectional view of one embodiment of a portion of an articulation joint and end effector. -
FIG. 24A illustrates one embodiment of the shaft assembly and articulation joint ofFIG. 24 showing connections between distal cable sections and proximal cable portions. -
FIG. 25 is an exploded assembly view of one embodiment of a portion of the articulation joint and end effector ofFIG. 24 . -
FIG. 26 is a partial cross-sectional perspective view of one embodiment of the articulation joint and end effector portions depicted inFIG. 25 . -
FIG. 27 is a partial perspective view of an end effector and drive shaft assembly embodiment. -
FIG. 28 is a partial side view of one embodiment of a drive shaft assembly. -
FIG. 29 is a perspective view of one embodiment of a drive shaft assembly. -
FIG. 30 is a side view of one embodiment of the drive shaft assembly ofFIG. 29 . -
FIG. 31 is a perspective view of one embodiment of a composite drive shaft assembly. -
FIG. 32 is a side view of one embodiment of the composite drive shaft assembly ofFIG. 31 . -
FIG. 33 is another view of one embodiment of the drive shaft assembly ofFIGS. 29 and 30 assuming an arcuate or “flexed” configuration. -
FIG. 33A is a side view of one embodiment of a drive shaft assembly assuming an arcuate or “flexed” configuration. -
FIG. 33B is a side view of one embodiment of another drive shaft assembly assuming an arcuate or “flexed” configuration. -
FIG. 34 is a perspective view of a portion of another drive shaft assembly embodiment. -
FIG. 35 is a top view of the drive shaft assembly embodiment ofFIG. 34 . -
FIG. 36 is another perspective view of the drive shaft assembly embodiment ofFIGS. 34 and 35 in an arcuate configuration. -
FIG. 37 is a top view of the drive shaft assembly embodiment depicted inFIG. 36 . -
FIG. 38 is a perspective view of another drive shaft assembly embodiment. -
FIG. 39 is another perspective view of the drive shaft assembly embodiment ofFIG. 38 in an arcuate configuration. -
FIG. 40 is a top view of the drive shaft assembly embodiment ofFIGS. 38 and 39 . -
FIG. 41 is a cross-sectional view of the drive shaft assembly embodiment ofFIG. 40 . -
FIG. 42 is a partial cross-sectional view of another drive shaft assembly embodiment. -
FIG. 43 is another cross-sectional view of the drive shaft assembly embodiment ofFIG. 42 . -
FIG. 44 is another cross-sectional view of a portion of another drive shaft assembly embodiment. -
FIG. 45 is another cross-sectional view of one embodiment of the drive shaft assembly ofFIG. 44 . -
FIG. 46 is a perspective view of another surgical tool embodiment. -
FIG. 47 is a cross-sectional perspective view of the surgical tool embodiment ofFIG. 46 -
FIG. 48 is a cross-sectional perspective view of a portion of one embodiment of an articulation system. -
FIG. 49 is a cross-sectional view of one embodiment of the articulation system ofFIG. 48 in a neutral position. -
FIG. 50 is another cross-sectional view of one embodiment of the articulation system ofFIGS. 48 and 49 in an articulated position. -
FIG. 51 is a side elevational view of a portion of one embodiment of the surgical tool ofFIGS. 46-47 with portions thereof omitted for clarity. -
FIG. 52 is a rear perspective view of a portion of one embodiment of the surgical tool ofFIGS. 46-47 with portions thereof omitted for clarity. -
FIG. 53 is a rear elevational view of a portion of one embodiment of the surgical tool ofFIGS. 46-47 with portions thereof omitted for clarity. -
FIG. 54 is a front perspective view of a portion of one embodiment of the surgical tool ofFIGS. 46-47 with portions thereof omitted for clarity. -
FIG. 55 is a side elevational view of a portion of the surgical tool embodiment ofFIGS. 46-47 with portions thereof omitted for clarity. -
FIG. 56 is an exploded assembly view of an example reversing system embodiment of the surgical tool ofFIGS. 46-47 . -
FIG. 57 is a perspective view of a lever arm embodiment of the reversing system ofFIG. 56 . -
FIG. 58 is a perspective view of a knife retractor button of one embodiment of the reversing system ofFIG. 56 . -
FIG. 59 is a perspective view of a portion of the surgical tool embodiment ofFIGS. 46-47 with portions thereof omitted for clarity and with the lever arm in actuatable engagement with the reversing gear. -
FIG. 60 is a perspective view of a portion of the surgical tool embodiment ofFIGS. 46-47 with portions thereof omitted for clarity and with the lever arm in an unactuated position. -
FIG. 61 is another perspective view of a portion of the surgical tool embodiment ofFIGS. 46-47 with portions thereof omitted for clarity and with the lever arm in actuatable engagement with the reversing gear. -
FIG. 62 is a side elevational view of a portion of a handle assembly portion of the surgical tool embodiment ofFIGS. 46-47 with a shifter button assembly moved into a position which will result in the rotation of the end effector when the drive shaft assembly is actuated. -
FIG. 63 is another side elevational view of a portion of a handle assembly portion of one embodiment of the surgical tool ofFIGS. 46-47 with the a shifter button assembly moved into another position which will result in the firing of the firing member in the end effector when the drive shaft assembly is actuated. -
FIG. 64 is a perspective view of an embodiment of a multi-axis articulating and rotating surgical tool. -
FIG. 65 is an exploded perspective view of various components of one embodiment of the surgical tool shown inFIG. 64 . -
FIG. 66 is a partial cross-sectional perspective view of one embodiment of the surgical tool shown inFIG. 64 , illustrating a rotary drive shaft engaging a rotary drive nut for actuating translation of an I-beam member and closure of a jaw assembly of an end effector. -
FIG. 67 is a cross-sectional perspective view of one embodiment of the surgical tool shown inFIG. 64 , illustrating a rotary drive shaft engaging a rotary drive nut for actuating translation of an I-beam member and closure of a jaw assembly of an end effector. -
FIG. 68 is a partial cross-sectional perspective view of one embodiment of the surgical tool shown inFIG. 64 , illustrating a rotary drive shaft engaging a shaft coupling for actuating rotation of an end effector. -
FIG. 69 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 64 , illustrating the jaw assembly of an end effector in an open position, an I-beam member in a proximally retracted position, and a rotary drive shaft engaging a rotary drive nut for actuating translation of the I-beam member and closure of the jaw assembly of the end effector. -
FIG. 70 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 64 , illustrating the jaw assembly of an end effector in a closed position, an I-beam member in a distally advanced position, and a rotary drive shaft engaging a rotary drive nut for actuating translation of the I-beam member and opening of the jaw assembly of the end effector. -
FIG. 71 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 64 , illustrating the jaw assembly of an end effector in an open position, an I-beam member in a proximally retracted position, and a rotary drive shaft engaging a shaft coupling for actuating rotation of the end effector. -
FIG. 72 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 64 , illustrating the jaw assembly of an end effector in a closed position, an I-beam member in a distally advanced position, and a rotary drive shaft engaging a shaft coupling for actuating rotation of the end effector. -
FIGS. 73 and 74 are side cross-sectional detail views of one embodiment of the surgical tool shown inFIG. 64 , illustrating the engagement of cam surfaces of an I-beam member with anvil surfaces of a first jaw member to move the first jaw member relative to a second jaw member between an open position and a closed position. -
FIG. 75 is an exploded view of the components comprising an embodiment of a multi-axis articulating and rotating surgical tool comprising a head locking mechanism. -
FIG. 76 is an exploded view of spline lock components of one embodiment of the head locking mechanism of the surgical tool illustrated inFIG. 75 . -
FIG. 77 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 75 , illustrating the jaw assembly of an end effector in an open position, an I-beam member in a proximally retracted position, a rotary drive shaft engaging a rotary drive nut for actuating translation of the I-beam member and closure of the jaw assembly of the end effector, and an engaged spline lock preventing rotation of the end effector. -
FIG. 78 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 75 , illustrating the jaw assembly of an end effector in a closed position, an I-beam member in a distally advanced position, a rotary drive shaft engaging a rotary drive nut for actuating translation of the I-beam member and opening of the jaw assembly of the end effector, and an engaged spline lock preventing rotation of the end effector. -
FIG. 79 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 75 , illustrating the jaw assembly of an end effector in an open position, an I-beam member in a proximally retracted position, a rotary drive shaft engaging a shaft coupling for actuating rotation of the end effector, and a disengaged spline lock allowing rotation of the end effector. -
FIG. 80 is a side cross-sectional view of one embodiment of the surgical tool shown inFIG. 64 , illustrating the jaw assembly of an end effector in a closed position, an I-beam member in a distally advanced position, a rotary drive shaft engaging a shaft coupling for actuating rotation of the end effector, and a disengaged spline lock allowing rotation of the end effector. -
FIG. 81 is a side cross-sectional detail view of one embodiment of the surgical tool shown inFIG. 80 . -
FIG. 82 is a side cross-sectional detail view of one embodiment of the surgical tool shown inFIG. 78 . -
FIG. 83 is a cross sectional perspective view of a surgical tool having first and second jaw members in accordance with certain embodiments described herein. -
FIG. 84 is prospective view of a closure nut of one embodiment of the surgical tool ofFIG. 83 . -
FIG. 85 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially open position, and wherein the rotary drive shaft is operably disengaged with the rotary drive nut. -
FIG. 86 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially open position, and wherein the rotary drive shaft is operably engaged with the rotary drive nut. -
FIG. 87 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially closed position, wherein the rotary drive shaft is operably engaged with the rotary drive nut, and wherein the closure nut is operably disengaged from the rotary drive nut. -
FIG. 88 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially closed position, wherein the rotary drive shaft is operably engaged with the rotary drive nut, and wherein the I-beam member is at least partially extended. -
FIG. 89 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially closed position, wherein the rotary drive shaft is operably engaged with the rotary drive nut, and wherein the I-beam member is at least partially retracted. -
FIG. 90 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially closed position, wherein the rotary drive shaft is operably engaged with the rotary drive nut, and wherein the I-beam member is at least partially retracted. -
FIG. 91 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 83 wherein the first jaw member and the second jaw member are in an at least partially open position, wherein the rotary drive shaft is operably engaged with the rotary drive nut, and wherein the closure nut is operably engaged from the rotary drive nut. -
FIG. 92 is a cross sectional perspective view of a surgical tool having first and second jaw members in accordance with certain embodiments described herein. -
FIG. 93 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 92 wherein the first jaw member and the second jaw member are in an at least partially open position, and wherein the rotary drive shaft is operably engaged with spline coupling portion of the end effector drive housing. -
FIG. 94 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 92 wherein the first jaw member and the second jaw member are in an at least partially closed position, and wherein the rotary drive shaft is operably engaged with spline coupling portion of the barrel cam. -
FIG. 95 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 92 wherein the first jaw member and the second jaw member are in an at least partially closed position, and wherein the rotary drive shaft is not operably engaged with any of the spline coupling portions. -
FIG. 96 is a cross sectional elevation view of one embodiment of the surgical tool ofFIG. 92 wherein the first jaw member and the second jaw member are in an at least partially closed position, and wherein the rotary drive shaft is operably engaged with spline coupling portion of the rotary drive nut. -
FIG. 97 illustrates a perspective view of an end effector and an articulation joint of a surgical instrument in accordance with at least one embodiment illustrated with portions removed for the purposes of illustration. -
FIG. 98 illustrates a detail view of a drive shaft in accordance with at least one embodiment configured to be translated within the end effector and the articulation joint ofFIG. 97 . -
FIG. 99 illustrates a perspective view of a drive shaft in accordance with at least one alternative embodiment. -
FIG. 100 illustrates an elevational view of one embodiment of the drive shaft ofFIG. 99 . -
FIG. 101 illustrates an elevational view of one embodiment of the drive shaft ofFIG. 99 illustrated in an articulated condition. -
FIG. 102 illustrates a perspective view of a drive shaft assembly comprising a drive tube and a thread extending around the drive tube in accordance with at least one alternative embodiment. -
FIG. 103 illustrates an elevational view of one embodiment of the drive shaft assembly ofFIG. 102 . -
FIG. 104 illustrates a perspective view of a drive shaft assembly comprising a drive tube, a thread extending around the drive tube, and an inner core extending through the drive tube in accordance with at least one embodiment. -
FIG. 105 illustrates an elevational view of one embodiment of the drive shaft assembly ofFIG. 104 . -
FIG. 106 is a perspective view of a surgical tool having first and second jaw members in accordance with certain embodiments described herein. -
FIG. 107 is cross sectional view of distal portions of one embodiment of the first and second jaw members of the surgical end tool shown inFIG. 106 . -
FIG. 108 is a perspective view of a surgical end effector and a shaft assembly in accordance with certain embodiments described herein. -
FIG. 109 is a prospective view of a jaw member of a surgical end effector in accordance with certain embodiments described herein. -
FIG. 110 is a cross-sectional view of a surgical effector detached from a shaft assembly in accordance with certain embodiments described herein. -
FIG. 111 is a cross-sectional view of a surgical effector attached to a shaft assembly in accordance with certain embodiments described herein. -
FIG. 112 is a perspective view of multiple interchangeable surgical end effectors in accordance with certain embodiments described herein. -
FIG. 113 is a perspective view of a surgical end effector including a cross sectional view of a jaw member in accordance with certain embodiments described herein. -
FIG. 114 is a cross-sectional view of a surgical effector detached from a shaft assembly in accordance with certain embodiments described herein. -
FIG. 115 is a cross-sectional view of a surgical effector attached to a shaft assembly in accordance with certain embodiments described herein. -
FIG. 116 is a perspective view of a surgical end effector having first and second jaws in accordance with certain embodiments described herein. -
FIG. 117 is another perspective view of the surgical end effector shown inFIG. 116 including a cross sectional perspective view of a jaw member in accordance with certain embodiments described herein. -
FIG. 118 is cross sectional view of a first jaw member and a second jaw member of a surgical end effector in accordance with certain embodiments described herein. -
FIG. 119 is cross sectional view of a first jaw member and a second jaw member of a surgical end effector in accordance with certain embodiments described herein -
FIG. 120 is a perspective view of a first jaw member and a second jaw member of a surgical end effector in accordance with certain embodiments described herein. -
FIG. 121 is a prospective view of a distal portion of a jaw member of a surgical end effector in accordance with certain embodiments described herein. -
FIG. 122 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 123 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 124 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 125 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 126 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 127 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 128 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 129 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 130 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 131 is a top view of a gripping portion in accordance with certain embodiments described herein. -
FIG. 132 is a perspective view of one embodiment of an end effector having first and second jaw members in an open position and angled tissue-contacting surfaces along substantially the entire length of the jaw members. -
FIG. 133 is another perspective view of one embodiment of the end effector shown inFIG. 132 with the first and second jaw members in a closed position. -
FIG. 134 is a front view of one embodiment of the end effector shown inFIG. 133 . -
FIG. 135 is a cross-sectional view of one embodiment of the end effector shown inFIG. 134 . -
FIG. 136 is a side view of one embodiment of the end effector shown inFIG. 132 . -
FIG. 137 is a side view of one embodiment of the end effector shown inFIG. 133 . -
FIG. 138 is a schematic diagram showing a front view of one embodiment of an end effector having first and second jaw members, wherein each jaw member has two oppositely-angled tissue-contacting surfaces. -
FIG. 139 is a perspective view of one embodiment of an end effector having first and second jaw members in an open position and angled tissue-contacting surfaces along a portion of the length of the jaw members. -
FIG. 140 is another perspective view of one embodiment of the end effector shown inFIG. 139 . -
FIG. 141 is a perspective view of one embodiment of an end effector having first and second jaw members in an open position, angled tissue-contacting surfaces along a portion of the length of the jaw members, and electrodes positioned between the two angled tissue-contacting surfaces on the second jaw member. -
FIG. 142 is a cross-sectional view of one embodiment of an end effector having first and second jaw members in a closed position clamping tissue between the jaw members, wherein the first and second jaw members have opposed angled tissue-contacting surfaces. -
FIG. 143 is a cross-sectional view of one embodiment of the end effector and shaft assembly ofFIGS. 64-82 illustrating an example installation of a rotary electrode assembly. -
FIG. 144 is an exploded view of one embodiment of the end effector and shaft assembly ofFIG. 143 showing the rotary electrode assembly both installed and exploded. -
FIG. 145 is a cross-sectional view of one embodiment of the end effector and shaft assembly ofFIG. 143 showing the rotary electrode assembly with a rotary drive head in a proximal position. -
FIG. 146 is a cross-sectional view of one embodiment of the end effector and shaft assembly ofFIG. 143 showing the rotary electrode assembly with the rotary drive head in a distal position. -
FIGS. 147-148 are cross-sectional views of one embodiment of the end effector and shaft assembly ofFIG. 143 where a longitudinal length of the outer contact is selected such that the rotary connector assembly alternately creates and breaks an electrical connection limited by the longitudinal position of the brush assembly. -
FIGS. 149-150 illustrate one embodiment of the end effector and shaft assembly ofFIG. 143 showing a configuration including lead portions and connector assembly between the end effector and the shaft assembly. -
FIG. 151 illustrates a cross-sectional view one embodiment of an end effector and shaft assembly showing another context in which a rotary connector assembly may utilized. -
FIG. 152 illustrates a cross-sectional view of one embodiment of the end effector and shaft assembly ofFIGS. 83-91 illustrating another example installation of a rotary electrode assembly. -
FIG. 153 illustrates one embodiment of an end effector that may be utilized with various surgical tools, including those described herein. -
FIG. 154 illustrates one embodiment of the end effector ofFIG. 153 showing a tissue contacting portion adjacent a longitudinal channel of the second jaw member of the end effector. -
FIG. 155 illustrates one embodiment of the end effector ofFIG. 153 showing an axial cross-section along a midline of the first jaw member showing a tissue-contacting portion disposed adjacent to a longitudinal channel of the first jaw member. -
FIG. 156 illustrates a perspective view of one embodiment of the end effector ofFIG. 153 in an open position. -
FIG. 157 illustrates a top view of one embodiment of a second jaw member suitable for use with the end effector ofFIG. 153 . -
FIG. 158 illustrates a bottom view of one embodiment of a first jaw member suitable for use with the end effector ofFIG. 153 . -
FIG. 159 illustrates a front cross-sectional view of another embodiment of the end effector ofFIG. 153 in a closed position. -
FIGS. 160-165 illustrates side cross-sectional views of various embodiments of the end effector ofFIG. 153 -
FIG. 166 illustrates another embodiment of the second jaw member suitable for use with the end effector ofFIG. 153 . in a closed position holding a surgical implement. -
FIG. 167 illustrates one embodiment of the second jaw member suitable for use with the end effector ofFIG. 153 . -
FIG. 168 illustrates another embodiment of the second jaw member suitable for use with the end effector ofFIG. 153 . - Applicant of the present application also owns the following patent applications that have been filed on even date herewith and which are each herein incorporated by reference in their respective entireties:
- 1. U.S. patent application Ser. No. ______, entitled “Flexible Drive Member,” (Attorney Docket No. END7131USNP/120135).
- 2. U.S. patent application Ser. No. ______, entitled “Coupling Arrangements for Attaching Surgical End Effectors to Drive Systems Therefor,” (Attorney Docket No. END7133USNP/120137).
- 3. U.S. patent application Ser. No. ______, entitled “Rotary Actuatable Closure Arrangement for Surgical End Effector,” (Attorney Docket No. END7134USNP/120138).
- 4. U.S. patent application Ser. No. ______, entitled “Interchangeable End Effector Coupling Arrangement,” (Attorney Docket No. END7136USNP/120140).
- 5. U.S. patent application Ser. No. ______, entitled “Surgical End Effector Jaw and Electrode Configurations,” (Attorney Docket No. END7137USNP/120141.
- 6. U.S. patent application Ser. No. ______, entitled “Multi-Axis Articulating and Rotating Surgical Tools,” (Attorney Docket No. END7138USNP/120142).
- 7. U.S. patent application Ser. No. ______, entitled “Differential Locking Arrangements for Rotary Powered Surgical Instruments,” (Attorney Docket No. END7139USNP/120143).
- 8. U.S. patent application Ser. No. ______, entitled “Interchangeable Clip Applier,” (Attorney Docket No. END7140USNP/120144).
- 9. U.S. patent application Ser. No. ______, entitled “Firing System Lockout Arrangements for Surgical Instruments,” (Attorney Docket No. END7141USNP/120145).
- 10. U.S. patent application Ser. No. ______, entitled “Rotary Drive Shaft Assemblies for Surgical Instruments with Articulatable End Effectors,” (Attorney Docket No. END7142USNP/120146).
- 11. U.S. patent application Ser. No. ______, entitled “Rotary Drive Arrangements for Surgical Instruments,” (Attorney Docket No. END7143USNP/120147).
- 12. U.S. patent application Ser. No. ______, entitled “Robotically Powered Surgical Device With Manually-Actuatable Reversing System,” (Attorney Docket No. END7144USNP/120148).
- 13. U.S. patent application Ser. No. ______, entitled “Replaceable Clip Cartridge for a Clip Applier,” (Attorney Docket No. END7145USNP/120149).
- 14. U.S. patent application Ser. No. ______, entitled “Empty Clip Cartridge Lockout,” (Attorney Docket No. END7146USNP/120150).
- 15. U.S. patent application Ser. No. ______, entitled “Surgical Instrument System Including Replaceable End Effectors,” (Attorney Docket No. END7147USNP/120151).
- 16. U.S. patent application Ser. No. ______, entitled “Rotary Support Joint Assemblies for Coupling a First Portion of a Surgical Instrument to a Second Portion of a Surgical Instrument,” (Attorney Docket No. END7148USNP/120152).
- 17. U.S. patent application Ser. No. ______, entitled “Electrode Connections for Rotary Driven Surgical Tools,” (Attorney Docket No. END7149USNP/120153).
- Applicant also owns the following patent applications that are each incorporated by reference in their respective entireties:
- U.S. patent application Ser. No. 13/118,259, entitled “Surgical Instrument With Wireless Communication Between a Control Unit of a Robotic System and Remote Sensor”, U.S. Patent Application Publication No. 2011-0295270 A1;
- U.S. patent application Ser. No. 13/118,210, entitled “Robotically-Controlled Disposable Motor Driven Loading Unit”, U.S. Patent Application Publication No. 2011-0290855 A1;
- U.S. patent application Ser. No. 13/118,194, entitled “Robotically-Controlled Endoscopic Accessory Channel”, U.S. Patent Application Publication No. 2011-0295242;
- U.S. patent application Ser. No. 13/118,253, entitled “Robotically-Controlled Motorized Surgical Instrument”, U.S. Patent Application Publication No. 2011-0295269 A1;
- U.S. patent application Ser. No. 13/118,278, entitled “Robotically-Controlled Surgical Stapling Devices That Produce Formed Staples Having Different Lengths”, U.S. Patent Application Publication No. 2011-0290851 A1;
- U.S. patent application Ser. No. 13/118,190, entitled “Robotically-Controlled Motorized Cutting and Fastening Instrument”, U.S. Patent Application Publication No. 2011-0288573 A1
- U.S. patent application Ser. No. 13/118,223, entitled “Robotically-Controlled Shaft Based Rotary Drive Systems For Surgical Instruments”, U.S. Patent Application Publication No. 2011-0290854 A1;
- U.S. patent application Ser. No. 13/118,263, entitled “Robotically-Controlled Surgical Instrument Having Recording Capabilities”, U.S. Patent Application Publication No. 2011-0295295 A1;
- U.S. patent application Ser. No. 13/118,272, entitled “Robotically-Controlled Surgical Instrument With Force Feedback Capabilities”, U.S. Patent Application Publication No. 2011-0290856 A1;
- U.S. patent application Ser. No. 13/118,246, entitled “Robotically-Driven Surgical Instrument With E-Beam Driver”, U.S. Patent Application Publication No. 2011-0290853 A1; and
- U.S. patent application Ser. No. 13/118,241, entitled “Surgical Stapling Instruments With Rotatable Staple Deployment Arrangements”.
- Certain example embodiments will now be described to provide an overall understanding of the principles of the structure, function, manufacture, and use of the devices and methods disclosed herein. One or more examples of these example embodiments are illustrated in the accompanying drawings. Those of ordinary skill in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting example embodiments and that the scope of the various example embodiments of the present invention is defined solely by the claims. The features illustrated or described in connection with one example embodiment may be combined with the features of other example embodiments. Such modifications and variations are intended to be included within the scope of the present invention.
-
FIG. 1 depicts amaster controller 12 that is used in connection with a roboticarm slave cart 20 of the type depicted inFIG. 2 .Master controller 12 and roboticarm slave cart 20, as well as their respective components and control systems are collectively referred to herein as arobotic system 10. Examples of such systems and devices are disclosed in U.S. Pat. No. 7,524,320 which has been herein incorporated by reference. Thus, various details of such devices will not be described in detail herein beyond that which may be necessary to understand various example embodiments disclosed herein. As is known, themaster controller 12 generally includes master controllers (generally represented as 14 inFIG. 1 ) which are grasped by the surgeon and manipulated in space while the surgeon views the procedure via astereo display 16. Themaster controllers 12 generally comprise manual input devices which preferably move with multiple degrees of freedom, and which often further have an actuatable handle for actuating tools (for example, for closing grasping jaws, applying an electrical potential to an electrode, or the like). - As can be seen in
FIG. 2 , therobotic arm cart 20 is configured to actuate a plurality of surgical tools, generally designated as 30. Various robotic surgery systems and methods employing master controller and robotic arm cart arrangements are disclosed in U.S. Pat. No. 6,132,368, entitled “Multi-Component Telepresence System and Method”, the full disclosure of which is incorporated herein by reference. As shown, therobotic arm cart 20 includes a base 22 from which, in the illustrated embodiment, threesurgical tools 30 are supported. Thesurgical tools 30 are each supported by a series of manually articulatable linkages, generally referred to as set-upjoints 32, and arobotic manipulator 34. These structures are herein illustrated with protective covers extending over much of the robotic linkage. These protective covers may be optional, and may be limited in size or entirely eliminated to minimize the inertia that is encountered by the servo mechanisms used to manipulate such devices, to limit the volume of moving components so as to avoid collisions, and to limit the overall weight of thecart 20. Thecart 20 generally has dimensions suitable for transporting thecart 20 between operating rooms. Thecart 20 is configured to typically fit through standard operating room doors and onto standard hospital elevators. Thecart 20 would preferably have a weight and include a wheel (or other transportation) system that allows thecart 20 to be positioned adjacent an operating table by a single attendant. - Referring now to
FIG. 3 ,robotic manipulators 34 as shown include alinkage 38 that constrains movement of thesurgical tool 30.Linkage 38 includes rigid links coupled together by rotational joints in a parallelogram arrangement so that thesurgical tool 30 rotates around a point inspace 40, as more fully described in U.S. Pat. No. 5,817,084, the full disclosure of which is herein incorporated by reference. The parallelogram arrangement constrains rotation to pivoting about an axis 40 a, sometimes called the pitch axis. The links supporting the parallelogram linkage are pivotally mounted to set-up joints 32 (FIG. 2 ) so that thesurgical tool 30 further rotates about anaxis 40 b, sometimes called the yaw axis. The pitch andyaw axes 40 a, 40 b intersect at theremote center 42, which is aligned along ashaft 44 of thesurgical tool 30. Thesurgical tool 30 may have further degrees of driven freedom as supported bymanipulator 50, including sliding motion of thesurgical tool 30 along the longitudinal tool axis “LT-LT”. As thesurgical tool 30 slides along the tool axis LT-LT relative to manipulator 50 (arrow 40 c),remote center 42 remains fixed relative tobase 52 ofmanipulator 50. Hence, the entire manipulator is generally moved to re-positionremote center 42.Linkage 54 ofmanipulator 50 is driven by a series ofmotors 56. These motors actively movelinkage 54 in response to commands from a processor of a control system.Motors 56 are also employed to manipulate thesurgical tool 30. An alternative set-up joint structure is illustrated inFIG. 4 . In this embodiment, asurgical tool 30 is supported by analternative manipulator structure 50′ between two tissue manipulation tools. - Other embodiments may incorporate a wide variety of alternative robotic structures, including those described in U.S. Pat. No. 5,878,193, entitled “Automated Endoscope System For Optimal Positioning”, the full disclosure of which is incorporated herein by reference. Additionally, while the data communication between a robotic component and the processor of the robotic surgical system is described with reference to communication between the
surgical tool 30 and themaster controller 12, similar communication may take place between circuitry of a manipulator, a set-up joint, an endoscope or other image capture device, or the like, and the processor of the robotic surgical system for component compatibility verification, component-type identification, component calibration (such as off-set or the like) communication, confirmation of coupling of the component to the robotic surgical system, or the like. - A
surgical tool 100 that is well-adapted for use with arobotic system 10 is depicted inFIGS. 5-6 .FIG. 5 illustrates an additional embodiment of thesurgical tool 100 andelectrosurgical end effector 3000. As can be seen inFIG. 5 , thesurgical tool 100 includes anelectrosurgical end effector 3000. Theelectrosurgical end effector 3000 may utilize electrical energy to treat and/or destroy tissue. Theelectrosurgical end effector 3000 generally comprises first andsecond jaw members FIGS. 6-10 , or curved as shown in various other figures described herein. One or both of thejaw members surgical tool 100 generally includes anelongate shaft assembly 200 that is operably coupled to themanipulator 50 by a tool mounting portion, generally designated as 300. Electrosurgical tools (e.g., surgical tools that include an electrosurgical end effector, such at thetool 100 and end effector 3000) may be used in any suitable type of surgical environment including, for example, open, laparoscopic, endoscopic, etc. - Generally, electrosurgical tools comprise one or more electrodes for providing electric current. The electrodes may be positioned against and/or positioned relative to tissue such that electrical current can flow through the tissue. The electrical current may generate heat in the tissue that, in turn, causes one or more hemostatic seals to form within the tissue and/or between tissues. For example, tissue heating caused by the electrical current may at least partially denature proteins within the tissue. Such proteins, such as collagen, for example, may be denatured into a proteinaceous amalgam that intermixes and fuses, or “welds”, together as the proteins renature. As the treated region heals over time, this biological “weld” may be reabsorbed by the body's wound healing process.
- Electrical energy provided by electrosurgical tools may be of any suitable form including, for example, direct or alternating current. For example, the electrical energy may include high frequency alternating current such as radio frequency or “RF” energy. RF energy may include energy in the range of 300 kilohertz (kHz) to 1 megahertz (MHz). When applied to tissue, RF energy may cause ionic agitation or friction, increasing the temperature of the tissue. Also, RF energy may provide a sharp boundary between affected tissue and other tissue surrounding it, allowing surgeons to operate with a high level of precision and control. The low operating temperatures of RF energy enables surgeons to remove, shrink or sculpt soft tissue while simultaneously sealing blood vessels. RF energy works particularly well on connective tissue, which is primarily comprised of collagen and shrinks when contacted by heat.
- In certain arrangements, some bi-polar (e.g., two-electrode) electrosurgical tools can comprise opposing first and second jaw members, where the face of each jaw can comprise a current path and/or electrode. In use, the tissue can be captured between the jaw faces such that electrical current can flow between the electrodes in the opposing jaw members and through the tissue positioned therebetween. Such tools may have to coagulate, seal or “weld” many types of tissues, such as anatomic structures having walls with irregular or thick fibrous content, bundles of disparate anatomic structures, substantially thick anatomic structures, and/or tissues with thick fascia layers such as large diameter blood vessels, for example. Some embodiments may include a knife or cutting edge to transect the tissue, for example, during or after the application of electrosurgical energy. With particular regard to cutting and sealing large diameter blood vessels, for example, such applications may require a high strength tissue weld immediately post-treatment.
-
FIG. 6 is a perspective view of one embodiment of theelectrosurgical tool 100 in electrical communication with agenerator 3002. Theelectrosurgical tool 100 in conjunction with thegenerator 3002 can be configured to supply energy, such as electrical energy, ultrasonic energy, and/or heat energy, for example, to the tissue of a patient. In the illustrated embodiment and in functionally similar embodiments, thegenerator 3002 is connected toelectrosurgical tool 100 via a suitable transmission medium such as a cable 3010. In one embodiment, thegenerator 3002 is coupled to a controller, such as acontrol unit 3004, for example. In various embodiments, thecontrol unit 3004 may be formed integrally with thegenerator 3002 or may be provided as a separate circuit module or device electrically coupled to the generator 3002 (shown in phantom to illustrate this option). Although in the presently disclosed embodiment, thegenerator 3002 is shown separate from theelectrosurgical tool 100, in one embodiment, the generator 3002 (and/or the control unit 3004) may be formed integrally with theelectrosurgical tool 100 to form a unitary electrosurgical system. For example, in some embodiments a generator or equivalent circuit may be present within thetool mounting portion 300 and/or within a handle in suitable manual embodiments (as described herein). - The
generator 3002 may comprise aninput device 3006 located on a front panel of thegenerator 3002 console. Theinput device 3006 may comprise any suitable device that generates signals suitable for programming the operation of thegenerator 3002, such as a keyboard, or input port, for example. In one embodiment, various electrodes in thefirst jaw member 3008A and thesecond jaw member 3008B may be coupled to thegenerator 3002. A cable 3010 connecting thetool mounting portion 300 to thegenerator 3002 may comprise multiple electrical conductors for the application of electrical energy to positive (+) and negative (−) electrodes of theelectrosurgical tool 100. Thecontrol unit 3004 may be used to activate thegenerator 3002, which may serve as an electrical source. In various embodiments, thegenerator 3002 may comprise an RF source, an ultrasonic source, a direct current source, and/or any other suitable type of electrical energy source, for example. - In various embodiments,
surgical tool 100 may comprise at least onesupply conductor 3012 and at least onereturn conductor 3014, wherein current can be supplied toelectrosurgical tool 100 via thesupply conductor 3012 and wherein the current can flow back to thegenerator 3002 viareturn conductor 3014. In various embodiments, thesupply conductor 3012 and thereturn conductor 3014 may comprise insulated wires and/or any other suitable type of conductor. In certain embodiments, as described below, thesupply conductor 3012 and thereturn conductor 3014 may be contained within and/or may comprise the cable 3010 extending between, or at least partially between, thegenerator 3002 and theend effector 3000 of theelectrosurgical tool 100. In any event, thegenerator 3002 can be configured to apply a sufficient voltage differential between thesupply conductor 3012 and thereturn conductor 3014 such that sufficient current can be supplied to theend effector 3000. - The
electrosurgical end effector 3000 may be adapted for capturing and transecting tissue and for the contemporaneously welding the captured tissue with controlled application of energy (e.g., RF energy).FIG. 7 illustrates one embodiment of theelectrosurgical end effector 300 with thejaw members movable member 3016 in a proximally retracted position.FIG. 8 illustrates one embodiment of theelectrosurgical end effector 300 with thejaw members movable member 3016 in a partially advanced position. - In use, the
jaw members first jaw member 3008A andsecond jaw member 3008B may also apply compression to the tissue. In some embodiments, theelongate shaft 200, along withfirst jaw member 3008A andsecond jaw member 3008B, can be rotated a full 360° degrees, as shown by arrow 3018 (seeFIG. 8 ), relative totool mounting portion 300. - The
first jaw member 3008A and thesecond jaw member 3008B may each comprise an elongate slot orchannel FIG. 7 ), respectively, disposed outwardly along their respective middle portions. Further, thefirst jaw member 3008A andsecond jaw member 3008B may each have tissue-gripping elements, such asteeth 3022, disposed on the inner portions offirst jaw member 3008A andsecond jaw member 3008B. Thelower jaw member 3008B may define a jaw body with an energy delivery surface orelectrode 3024B. For example, theelectrode 3024B may be in electrical communication with thegenerator 3002 via thesupply conductor 3012. Anenergy delivery surface 3024A on the upper first jaw member 3008 may provide a return path for electrosurgical energy. For example, theenergy delivery surface 3024A may be in electrical communication with thereturn conductor 3014. In the illustrated embodiment and in functionally similar embodiments, other conductive parts of thesurgical tool 100 including, for example thejaw members shaft 200, etc. may form all or a part of the return path. Various configurations of electrodes and various configurations for coupling the energy delivery surfaces 3024A, 3024B to theconductors supply electrode 3024B may be provided on thelower jaw member 3008B as shown or on theupper jaw member 3008A. - Distal and proximal translation of the axially
moveable member 3016 may serve to open and close thejaw members FIG. 9 is a perspective view of one embodiment of the axiallymoveable member 3016 of thesurgical tool 100. The axiallymoveable member 3016 may comprise one or several pieces, but in any event, may be movable or translatable with respect to theelongate shaft 200 and/or thejaw members moveable member 3016 may be made of 17-4 precipitation hardened stainless steel. The distal end of axiallymoveable member 3016 may comprise a flanged “I”-beam configured to slide within the channels 3020AA and 3020B injaw members moveable member 3016 may slide within thechannels first jaw member 3008A andsecond jaw member 3008B. The distal end of the axiallymoveable member 3016 may also comprise an upper flange or “c”-shapedportion 3016A and a lower flange or “c”-shapedportion 3016B. Theflanges first jaw member 3008A andsecond jaw member 3008B. The opening-closing ofjaw members moveable member 3016 and the outward facing surfaces 3028A, 3028B ofjaw members - More specifically, referring now to
FIGS. 7-9 , collectively, the inner cam surfaces 3026A and 3026B of the distal end of axiallymoveable member 3016 may be adapted to slidably engage the first outward-facingsurface 3028A and the second outward-facingsurface 3028B of thefirst jaw member 3008A and thesecond jaw member 3008B, respectively. Thechannel 3020A withinfirst jaw member 3008A and thechannel 3020B within thesecond jaw member 3008B may be sized and configured to accommodate the movement of the axiallymoveable member 3016, which may comprise a tissue-cuttingelement 3030, for example, comprising a sharp distal edge.FIG. 8 , for example, shows the distal end of the axiallymoveable member 3016 advanced at least partially throughchannels FIG. 7 ). The advancement of the axiallymoveable member 3016 may close theend effector 3000 from the open configuration shown inFIG. 7 . In the closed position shown byFIG. 8 , the upperfirst jaw member 3008A and lowersecond jaw member 3008B define a gap or dimension D between the firstenergy delivery surface 3024A and secondenergy delivery surface 3024B offirst jaw member 3008A andsecond jaw member 3008B, respectively. In various embodiments, dimension D can equal from about 0.0005″ to about 0.040″, for example, and in some embodiments, between about 0.001″ to about 0.010″, for example. Also, the edges of the firstenergy delivery surface 3024A and the secondenergy delivery surface 3024B may be rounded to prevent the dissection of tissue. -
FIG. 10 is a section view of one embodiment of theend effector 3000 of thesurgical tool 100. The engagement, or tissue-contacting,surface 3024B of thelower jaw member 3008B is adapted to deliver energy to tissue, at least in part, through a conductive-resistive matrix, such as a variable resistive positive temperature coefficient (PTC) body, as discussed in more detail below. At least one of the upper andlower jaw members generator 3002 to the captured tissue. The engagement, or tissue-contacting,surface 3024A ofupper jaw member 3008A may carry a similar conductive-resistive matrix (i.e., a PTC material), or in some embodiments the surface may be a conductive electrode or an insulative layer, for example. Alternatively, the engagement surfaces of the jaw members can carry any of the energy delivery components disclosed in U.S. Pat. No. 6,773,409, filed Oct. 22, 2001, entitled ELECTROSURGICAL JAW STRUCTURE FOR CONTROLLED ENERGY DELIVERY, the entire disclosure of which is incorporated herein by reference. - The first
energy delivery surface 3024A and the secondenergy delivery surface 3024B may each be in electrical communication with thegenerator 3002. The firstenergy delivery surface 3024A and the secondenergy delivery surface 3024B may be configured to contact tissue and deliver electrosurgical energy to captured tissue which are adapted to seal or weld the tissue. Thecontrol unit 3004 regulates the electrical energy delivered byelectrical generator 3002 which in turn delivers electrosurgical energy to the firstenergy delivery surface 3024A and the secondenergy delivery surface 3024B. The energy delivery may be initiated in any suitable manner (e.g., upon actuation of therobot system 10. In one embodiment, theelectrosurgical tool 100 may be energized by thegenerator 3002 by way of a foot switch 3034 (FIG. 6 ). When actuated, thefoot switch 3034 triggers thegenerator 3002 to deliver electrical energy to theend effector 3000, for example. Thecontrol unit 3004 may regulate the power generated by thegenerator 3002 during activation. Although thefoot switch 3034 may be suitable in many circumstances, other suitable types of switches can be used. - As mentioned above, the electrosurgical energy delivered by
electrical generator 3002 and regulated, or otherwise controlled, by thecontrol unit 3004 may comprise radio frequency (RF) energy, or other suitable forms of electrical energy. Further, one or both of the opposing first and second energy delivery surfaces 3024A and 3024B may carry variable resistive positive temperature coefficient (PTC) bodies that are in electrical communication with thegenerator 3002 and thecontrol unit 3004. Additional details regarding electrosurgical end effectors, jaw closing mechanisms, and electrosurgical energy-delivery surfaces are described in the following U.S. patents and published patent applications: U.S. Pat. Nos. 7,087,054; 7,083,619; 7,070,597; 7,041,102; 7,011,657; 6,929,644; 6,926,716; 6,913,579; 6,905,497; 6,802,843; 6,770,072; 6,656,177; 6,533,784; and 6,500,176; and U.S. Pat. App. Pub. Nos. 2010/0036370 and 2009/0076506, all of which are incorporated herein in their entirety by reference and made a part of this specification. - In one embodiment, the
generator 3002 may be implemented as an electrosurgery unit (ESU) capable of supplying power sufficient to perform bipolar electrosurgery using radio frequency (RF) energy. In one embodiment, the ESU can be abipolar ERBE ICC 350 sold by ERBE USA, Inc. of Marietta, Ga. In some embodiments, such as for bipolar electrosurgery applications, a surgical tool having an active electrode and a return electrode can be utilized, wherein the active electrode and the return electrode can be positioned against, adjacent to and/or in electrical communication with, the tissue to be treated such that current can flow from the active electrode, through the positive temperature coefficient (PTC) bodies and to the return electrode through the tissue. Thus, in various embodiments, the electrosurgical system 150 may comprise a supply path and a return path, wherein the captured tissue being treated completes, or closes, the circuit. In one embodiment, thegenerator 3002 may be a monopolar RF ESU and theelectrosurgical tool 100 may comprise amonopolar end effector 3000 in which one or more active electrodes are integrated. For such a system, thegenerator 3002 may require a return pad in intimate contact with the patient at a location remote from the operative site and/or other suitable return path. The return pad may be connected via a cable to thegenerator 3002. - During operation of
electrosurgical tool 100, the clinician generally grasps tissue, supplies energy to the captured tissue to form a weld or a seal (e.g., by actuating button 214 and/or pedal 216), and then drives the tissue-cuttingelement 3030 at the distal end of the axiallymoveable member 3016 through the captured tissue. According to various embodiments, the translation of the axial movement of the axiallymoveable member 3016 may be paced, or otherwise controlled, to aid in driving the axiallymoveable member 3016 at a suitable rate of travel. By controlling the rate of the travel, the likelihood that the captured tissue has been properly and functionally sealed prior to transection with thecutting element 3030 is increased. - Referring now to the embodiment depicted in
FIGS. 11-15 , thetool mounting portion 300 includes atool mounting plate 304 that operably supports a plurality of (four are shown inFIG. 15 ) rotatable body portions, driven discs orelements 306, that each include a pair ofpins 308 that extend from a surface of the drivenelement 306. Onepin 308 is closer to an axis of rotation of each drivenelements 306 than theother pin 308 on the same drivenelement 306, which helps to ensure positive angular alignment of the drivenelement 306.Interface 302 may include anadaptor portion 310 that is configured to mountingly engage a mountingplate 304 as will be further discussed below. The illustratedadaptor portion 310 includes an array of electrical connecting pins 312 (FIG. 13 ) which may be coupled to a memory structure by a circuit board within thetool mounting portion 300. Whileinterface 302 is described herein with reference to mechanical, electrical, and magnetic coupling elements, it should be understood that a wide variety of telemetry modalities might be used, including infrared, inductive coupling, or the like in other embodiments. - As can be seen in
FIGS. 11-14 , theadapter portion 310 generally includes atool side 314 and aholder side 316. A plurality ofrotatable bodies 320 are mounted to a floatingplate 318 which has a limited range of movement relative to the surrounding adaptor structure normal to the major surfaces of theadaptor 310. Axial movement of the floatingplate 318 helps decouple therotatable bodies 320 from thetool mounting portion 300 when levers or other latch formations along the sides of the tool mounting portion housing (not shown) are actuated. Other embodiments may employ other mechanisms/arrangements for releasably coupling thetool mounting portion 300 to theadaptor 310. In the embodiment ofFIGS. 11-15 ,rotatable bodies 320 are resiliently mounted to floatingplate 318 by resilient radial members which extend into a circumferential indentation about therotatable bodies 320. Therotatable bodies 320 can move axially relative toplate 318 by deflection of these resilient structures. When disposed in a first axial position (toward tool side 314) therotatable bodies 320 are free to rotate without angular limitation. However, as therotatable bodies 320 move axially towardtool side 314, tabs 322 (extending radially from the rotatable bodies 320) laterally engage detents on the floating plates so as to limit angular rotation of therotatable bodies 320 about their axes. This limited rotation can be used to help drivingly engage therotatable bodies 320 with drive pins 332 of a correspondingtool holder portion 330 of therobotic system 10, as the drive pins 332 will push therotatable bodies 320 into the limited rotation position until thepins 332 are aligned with (and slide into)openings 334′.Openings 334 on thetool side 314 andopenings 334′ on theholder side 316 ofrotatable bodies 320 are configured to accurately align the driven elements 306 (FIG. 15 ) of thetool mounting portion 300 with thedrive elements 336 of thetool holder 330. As described above regarding inner andouter pins 308 of drivenelements 306, theopenings rotatable bodies 306 so as to ensure that the alignment is not 180 degrees from its intended position. Additionally, each of theopenings 304 may be slightly radially elongate so as to fittingly receive thepins 308 in the circumferential orientation. This allows thepins 308 to slide radially within theopenings tool 100 andtool holder 330, while minimizing any angular misalignment and backlash between the drive and driven elements.Openings 334 on thetool side 314 may be offset by about 90 degrees from theopenings 334′ (shown in broken lines) on theholder side 316, as can be seen most clearly inFIG. 14 . - In the embodiment of
FIGS. 11-15 , an array of electrical connector pins 340 are located onholder side 316 ofadaptor 310 and thetool side 314 of theadaptor 310 includes slots 342 (FIG. 14 ) for receiving a pin array (not shown) from thetool mounting portion 300. In addition to transmitting electrical signals between thesurgical tool 100 and thetool holder 330, at least some of these electrical connections may be coupled to an adaptor memory device 344 (FIG. 13 ) by a circuit board of theadaptor 310. - In the embodiment of
FIGS. 11-15 , adetachable latch arrangement 346 is employed to releasably affix theadaptor 310 to thetool holder 330. As used herein, the term “tool drive assembly” when used in the context of therobotic system 10, at least encompasses theadapter 310 andtool holder 330 and which have been collectively generally designated as 110 inFIG. 11 . As can be seen inFIG. 11 , thetool holder 330 includes a first latch pin arrangement 337 that is sized to be received in correspondingclevis slots 311 provided in theadaptor 310. In addition, thetool holder 330 further has second latch pins 338 that are sized to be retained incorresponding latch clevises 313 in theadaptor 310. SeeFIG. 11 . Alatch assembly 315 is movably supported on theadapter 310 and has a pair oflatch clevises 317 formed therein that is biasable from a first latched position wherein the latch pins 338 are retained within theirrespective latch clevis 313 and an unlatched position wherein theclevises 317 are aligned withclevises 313 to enable the second latch pins 338 may be inserted into or removed from thelatch clevises 313. A spring or springs (not shown) are employed to bias the latch assembly into the latched position. A lip on thetool side 314 ofadaptor 310 slidably receives laterally extending tabs of the tool mounting housing (not shown). - Referring now to FIGS. 5 and 16-21, the
tool mounting portion 300 operably supports a plurality of drive systems for generating various forms of control motions necessary to operate a particular type of end effector that is coupled to the distal end of theelongate shaft assembly 200. As shown in FIGS. 5 and 16-21, thetool mounting portion 300 includes a first drive system generally designated as 350 that is configured to receive a corresponding “first” rotary output motion from thetool drive assembly 110 of therobotic system 10 and convert that first rotary output motion to a first rotary control motion to be applied to the surgical end effector. In the illustrated embodiment, the first rotary control motion is employed to rotate the elongate shaft assembly 200 (and surgical end effector 3000) about a longitudinal tool axis LT-LT. - In the embodiment of FIGS. 5 and 16-18, the
first drive system 350 includes atube gear segment 354 that is formed on (or attached to) theproximal end 208 of aproximal tube segment 202 of theelongate shaft assembly 200. Theproximal end 208 of theproximal tube segment 202 is rotatably supported on thetool mounting plate 304 of thetool mounting portion 300 by aforward support cradle 352 that is mounted on thetool mounting plate 304. SeeFIG. 16 . Thetube gear segment 354 is supported in meshing engagement with a firstrotational gear assembly 360 that is operably supported on thetool mounting plate 304. As can be seen inFIG. 16 , therotational gear assembly 360 comprises a firstrotation drive gear 362 that is coupled to a corresponding first one of the driven discs orelements 306 on theholder side 316 of thetool mounting plate 304 when thetool mounting portion 300 is coupled to thetool drive assembly 110. SeeFIG. 15 . Therotational gear assembly 360 further comprises a first rotary drivengear 364 that is rotatably supported on thetool mounting plate 304. The first rotary drivengear 364 is in meshing engagement with a second rotary drivengear 366 which, in turn, is in meshing engagement with thetube gear segment 354. Application of a first rotary output motion from thetool drive assembly 110 of therobotic system 10 to the corresponding drivenelement 306 will thereby cause rotation of therotation drive gear 362. Rotation of therotation drive gear 362 ultimately results in the rotation of the elongate shaft assembly 200 (and the surgical end effector 3000) about the longitudinal tool axis LT-LT (represented by arrow “R” inFIG. 5 ). It will be appreciated that the application of a rotary output motion from thetool drive assembly 110 in one direction will result in the rotation of theelongate shaft assembly 200 andsurgical end effector 3000 about the longitudinal tool axis LT-LT in a first rotary direction and an application of the rotary output motion in an opposite direction will result in the rotation of theelongate shaft assembly 200 andsurgical end effector 3000 in a second rotary direction that is opposite to the first rotary direction. - In embodiment of FIGS. 5 and 16-21, the
tool mounting portion 300 further includes a second drive system generally designated as 370 that is configured to receive a corresponding “second” rotary output motion from thetool drive assembly 110 of therobotic system 10 and convert that second rotary output motion to a second rotary control motion for application to the surgical end effector. Thesecond drive system 370 includes a secondrotation drive gear 372 that is coupled to a corresponding second one of the driven discs orelements 306 on theholder side 316 of thetool mounting plate 304 when thetool mounting portion 300 is coupled to thetool drive assembly 110. SeeFIG. 15 . Thesecond drive system 370 further comprises a first rotary drivengear 374 that is rotatably supported on thetool mounting plate 304. The first rotary drivengear 374 is in meshing engagement with ashaft gear 376 that is movably and non-rotatably mounted onto a proximaldrive shaft segment 380. In this illustrated embodiment, theshaft gear 376 is non-rotatably mounted onto the proximaldrive shaft segment 380 by a series ofaxial keyways 384 that enable theshaft gear 376 to axially move on the proximaldrive shaft segment 380 while being non-rotatably affixed thereto. Rotation of the proximaldrive shaft segment 380 results in the transmission of a second rotary control motion to thesurgical end effector 3000. - The
second drive system 370 in the embodiment of FIGS. 5 and 16-21 includes ashifting system 390 for selectively axially shifting the proximaldrive shaft segment 380 which moves theshaft gear 376 into and out of meshing engagement with the first rotary drivengear 374. For example, as can be seen inFIGS. 16-18 , the proximaldrive shaft segment 380 is supported within asecond support cradle 382 that is attached to thetool mounting plate 304 such that the proximaldrive shaft segment 380 may move axially and rotate relative to thesecond support cradle 382. In at least one form, the shiftingsystem 390 further includes ashifter yoke 392 that is slidably supported on thetool mounting plate 304. The proximaldrive shaft segment 380 is supported in theshifter yoke 392 and has a pair ofcollars 386 thereon such that shifting of theshifter yoke 392 on thetool mounting plate 304 results in the axial movement of the proximaldrive shaft segment 380. In at least one form, the shiftingsystem 390 further includes ashifter solenoid 394 that operably interfaces with theshifter yoke 392. Theshifter solenoid 394 receives control power from therobotic controller 12 such that when theshifter solenoid 394 is activated, theshifter yoke 392 is moved in the distal direction “DD”. - In this illustrated embodiment, a
shaft spring 396 is journaled on the proximaldrive shaft segment 380 between theshaft gear 376 and thesecond support cradle 382 to bias theshaft gear 376 in the proximal direction “PD” and into meshing engagement with the first rotary drivengear 374. SeeFIGS. 16 , 18 and 19. Rotation of the secondrotation drive gear 372 in response to rotary output motions generated by therobotic system 10 ultimately results in the rotation of the proximaldrive shaft segment 380 and other drive shaft components coupled thereto (drive shaft assembly 388) about the longitudinal tool axis LT-LT. It will be appreciated that the application of a rotary output motion from thetool drive assembly 110 in one direction will result in the rotation of the proximaldrive shaft segment 380 and ultimately of the other drive shaft components attached thereto in a first direction and an application of the rotary output motion in an opposite direction will result in the rotation of the proximaldrive shaft segment 380 in a second direction that is opposite to the first direction. When it is desirable to shift the proximaldrive shaft segment 380 in the distal direction “DD” as will be discussed in further detail below, therobotic controller 12 activates theshifter solenoid 390 to shift theshifter yoke 392 in the distal direction “DD”. IN some embodiments, theshifter solenoid 390 may be capable of shifting the proximaldrive shaft segment 380 between more than two longitudinal positions. For example, some embodiments, such as those described herein with respect toFIGS. 83-96 , may utilize the rotary drive shaft (e.g., coupled to the proximal drive shaft segment 380) in more than two longitudinal positions. -
FIGS. 22-23 illustrate another embodiment that employs the same components of the embodiment depicted in FIGS. 5 and 16-21 except that this embodiment employs a battery-powereddrive motor 400 for supplying rotary drive motions to the proximaldrive shaft segment 380. Such arrangement enables the tool mounting portion to generate higher rotary output motions and torque which may be advantageous when different forms of end effectors are employed. As can be seen in those Figures, themotor 400 is attached to thetool mounting plate 304 by asupport structure 402 such that a driver gear 404 that is coupled to themotor 400 is retained in meshing engagement with theshaft gear 376. In the embodiment ofFIGS. 22-23 , thesupport structure 402 is configured to removably engagelatch notches 303 formed in thetool mounting plate 304 that are designed to facilitate attachment of a housing member (not shown) to the mountingplate 304 when themotor 400 is not employed. Thus, to employ themotor 400, the clinician removes the housing from thetool mounting plate 304 and then inserts the legs 403 of the support structure into thelatch notches 303 in thetool mounting plate 304. The proximaldrive shaft segment 380 and the other drive shaft components attached thereto are rotated about the longitudinal tool axis LT-LT by powering themotor 400. As illustrated, themotor 400 is battery powered. In such arrangement, however, themotor 400 interface with therobotic controller 12 such that therobotic system 10 controls the activation of themotor 400. In alternative embodiments, themotor 400 is manually actuatable by an on/off switch (not shown) mounted on themotor 400 itself or on thetool mounting portion 300. In still other embodiments, themotor 400 may receive power and control signals from the robotic system. - The embodiment illustrated in FIGS. 5 and 16-21 includes a manually-actuatable reversing system, generally designated as 410, for manually applying a reverse rotary motion to the proximal
drive shaft segment 380 in the event that the motor fails or power to the robotic system is lost or interrupted. Such manually-actuatable reversing system 410 may also be particularly useful, for example, when thedrive shaft assembly 388 becomes jammed or otherwise bound in such a way that would prevent reverse rotation of the drive shaft components under the motor power alone. In the illustrated embodiment, the mechanically-actuatable reversing system 410 includes adrive gear assembly 412 that is selectively engagable with the second rotary drivengear 376 and is manually actuatable to apply a reversing rotary motion to the proximaldrive shaft segment 380. Thedrive gear assembly 412 includes a reversinggear 414 that is movably mounted to thetool mounting plate 304. The reversinggear 414 is rotatably journaled on apivot shaft 416 that is movably mounted to thetool mounting plate 304 through aslot 418. SeeFIG. 17 . In the embodiment of FIGS. 5 and 16-21, the manually-actuatable reversing system 410 further includes a manuallyactuatable drive gear 420 that includes abody portion 422 that has anarcuate gear segment 424 formed thereon. Thebody portion 422 is pivotally coupled to thetool mounting plate 304 for selective pivotal travel about an actuator axis A-A (FIG. 16 ) that is substantially normal to thetool mounting plate 304. -
FIGS. 16-19 depict the manually-actuatable reversing system 410 in a first unactuated position. In one example form, anactuator handle portion 426 is formed on or otherwise attached to thebody portion 422. Theactuator handle portion 426 is sized relative to thetool mounting plate 304 such that a small amount of interference is established between thehandle portion 426 and thetool mounting plate 304 to retain thehandle portion 426 in the first unactuated position. However, when the clinician desires to manually actuate thedrive gear assembly 412, the clinician can easily overcome the interference fit by applying a pivoting motion to thehandle portion 426. As can also be seen inFIGS. 16-19 , when thedrive gear assembly 412 is in the first unactuated position, thearcuate gear segment 424 is out of meshing engagement with the reversinggear 414. When the clinician desires to apply a reverse rotary drive motion to the proximaldrive shaft segment 380, the clinician begins to apply a pivotal ratcheting motion to drivegear 420. As thedrive gear 420 begins to pivot about the actuation axis A-A, a portion of thebody 422 contacts a portion of the reversinggear 414 and axially moves the reversinggear 414 in the distal direction DD taking thedrive shaft gear 376 out of meshing engagement with the first rotary drivengear 374 of thesecond drive system 370. SeeFIG. 20 . As thedrive gear 420 is pivoted, thearcuate gear segment 424 is brought into meshing engagement with the reversinggear 414. Continued ratcheting of thedrive gear 420 results in the application of a reverse rotary drive motion to thedrive shaft gear 376 and ultimately to the proximaldrive shaft segment 380. The clinician may continue to ratchet thedrive gear assembly 412 for as many times as are necessary to fully release or reverse the associated end effector component(s). Once a desired amount of reverse rotary motion has been applied to the proximaldrive shaft segment 380, the clinician returns thedrive gear 420 to the starting or unactuated position wherein thearcuate gear segment 416 is out of meshing engagement with thedrive shaft gear 376. When in that position, theshaft spring 396 once again biases theshaft gear 376 into meshing engagement with first rotary drivengear 374 of thesecond drive system 370. - In use, the clinician may input control commands to the controller or control unit of the
robotic system 10 which “robotically-generates” output motions that are ultimately transferred to the various components of thesecond drive system 370. As used herein, the terms “robotically-generates” or “robotically-generated” refer to motions that are created by powering and controlling the robotic system motors and other powered drive components. These terms are distinguishable from the terms “manually-actuatable” or “manually generated” which refer to actions taken by the clinician which result in control motions that are generated independent from those motions that are generated by powering the robotic system motors. Application of robotically-generated control motions to the second drive system in a first direction results in the application of a first rotary drive motion to thedrive shaft assembly 388. When thedrive shaft assembly 388 is rotated in a first rotary direction, the axiallymovable member 3016 is driven in the distal direction “DD” from its starting position toward its ending position in theend effector 3000, for example, as described herein with respect toFIGS. 64-96 . Application of robotically-generated control motions to the second drive system in a second direction results in the application of a second rotary drive motion to thedrive shaft assembly 388. When thedrive shaft assembly 388 is rotated in a second rotary direction, the axiallymovable member 3016 is driven in the proximal direction “PD” from its ending position toward its starting position in theend effector 3000. When the clinician desires to manually-apply rotary control motion to thedrive shaft assembly 388, thedrive shaft assembly 388 is rotated in the second rotary direction which causes a firing member (e.g., axially translatable member 3016) to move in the proximal direction “PD” in the end effector. Other embodiments containing the same components are configured such that the manual-application of a rotary control motion to the drive shaft assembly could cause the drive shaft assembly to rotate in the first rotary direction which could be used to assist the robotically-generated control motions to drive the axiallymovable member 3016 in the distal direction. - The drive shaft assembly that is used to fire, close and rotate the end effector can be actuated and shifted manually allowing the end effector to release and be extracted from the surgical site as well as the abdomen even in the event that the motor(s) fail, the robotic system loses power or other electronic failure occurs. Actuation of the
handle portion 426 results in the manual generation of actuation or control forces that are applied to thedrive shaft assembly 388′ by the various components of the manually-actuatable reversing system 410. If thehandle portion 426 is in its unactuated state, it is biased out of actuatable engagement with the reversinggear 414. The beginning of the actuation of thehandle portion 426 shifts the bias. Thehandle 426 is configured for repeated actuation for as many times as are necessary to fully release the axiallymovable member 3016 and theend effector 3000. - As illustrated in FIGS. 5 and 16-21, the
tool mounting portion 300 includes athird drive system 430 that is configured to receive a corresponding “third” rotary output motion from thetool drive assembly 110 of therobotic system 10 and convert that third rotary output motion to a third rotary control motion. Thethird drive system 430 includes athird drive pulley 432 that is coupled to a corresponding third one of the driven discs orelements 306 on theholder side 316 of thetool mounting plate 304 when thetool mounting portion 300 is coupled to thetool drive assembly 110. SeeFIG. 15 . Thethird drive pulley 432 is configured to apply a third rotary control motion (in response to corresponding rotary output motions applied thereto by the robotic system 10) to a correspondingthird drive cable 434 that may be used to apply various control or manipulation motions to the end effector that is operably coupled to theshaft assembly 200. As can be most particularly seen inFIGS. 16-17 , thethird drive cable 434 extends around a thirddrive spindle assembly 436. The thirddrive spindle assembly 436 is pivotally mounted to thetool mounting plate 304 and athird tension spring 438 is attached between the thirddrive spindle assembly 436 and thetool mounting plate 304 to maintain a desired amount of tension in thethird drive cable 434. As can be seen in the Figures,cable end portion 434A of thethird drive cable 434 extends around an upper portion of apulley block 440 that is attached to thetool mounting plate 304 andcable end portion 434B extends around a sheave pulley or standoff 442 on thepulley block 440. It will be appreciated that the application of a third rotary output motion from thetool drive assembly 110 in one direction will result in the rotation of thethird drive pulley 432 in a first direction and cause thecable end portions end effector 3000 orelongate shaft assembly 200 as will be discussed in further detail below. That is, when thethird drive pulley 432 is rotated in a first rotary direction, thecable end portion 434A moves in a distal direction “DD” andcable end portion 434B moves in a proximal direction “PD”. Rotation of thethird drive pulley 432 in an opposite rotary direction result in thecable end portion 434A moving in a proximal direction “PD” andcable end portion 434B moving in a distal direction “DD”. - The
tool mounting portion 300 illustrated in FIGS. 5 and 16-21 includes afourth drive system 450 that is configured to receive a corresponding “fourth” rotary output motion from thetool drive assembly 110 of therobotic system 10 and convert that fourth rotary output motion to a fourth rotary control motion. Thefourth drive system 450 includes afourth drive pulley 452 that is coupled to a corresponding fourth one of the driven discs orelements 306 on theholder side 316 of thetool mounting plate 304 when thetool mounting portion 300 is coupled to thetool drive assembly 110. SeeFIG. 15 . Thefourth drive pulley 452 is configured to apply a fourth rotary control motion (in response to corresponding rotary output motions applied thereto by the robotic system 10) to a correspondingfourth drive cable 454 that may be used to apply various control or manipulation motions to the end effector that is operably coupled to theshaft assembly 200. As can be most particularly seen inFIGS. 16-17 , thefourth drive cable 454 extends around a fourthdrive spindle assembly 456. The fourthdrive spindle assembly 456 is pivotally mounted to thetool mounting plate 304 and afourth tension spring 458 is attached between the fourthdrive spindle assembly 456 and thetool mounting plate 304 to maintain a desired amount of tension in thefourth drive cable 454.Cable end portion 454A of thefourth drive cable 454 extends around a bottom portion of thepulley block 440 that is attached to thetool mounting plate 304 andcable end portion 454B extends around a sheave pulley or fourth standoff 462 on thepulley block 440. It will be appreciated that the application of a rotary output motion from thetool drive assembly 110 in one direction will result in the rotation of thefourth drive pulley 452 in a first direction and cause thecable end portions elongate shaft assembly 200 as will be discussed in further detail below. That is, when thefourth drive pulley 434 is rotated in a first rotary direction, thecable end portion 454A moves in a distal direction “DD” andcable end portion 454B moves in a proximal direction “PD”. Rotation of thefourth drive pulley 452 in an opposite rotary direction result in thecable end portion 454A moving in a proximal direction “PD” andcable end portion 454B to move in a distal direction “DD”. - The
surgical tool 100 as depicted inFIGS. 5-6 includes an articulation joint 3500. In such embodiment, thethird drive system 430 may also be referred to as a “first articulation drive system” and thefourth drive system 450 may be referred to herein as a “second articulation drive system”. Likewise, thethird drive cable 434 may be referred to as a “first proximal articulation cable” and thefourth drive cable 454 may be referred to herein as a “second proximal articulation cable”. - The
tool mounting portion 300 of the embodiment illustrated in FIGS. 5 and 16-21 includes a fifth drive system generally designated as 470 that is configured to axially displace adrive rod assembly 490. Thedrive rod assembly 490 includes a proximaldrive rod segment 492 that extends through the proximaldrive shaft segment 380 and thedrive shaft assembly 388. SeeFIG. 18 . Thefifth drive system 470 includes amovable drive yoke 472 that is slidably supported on thetool mounting plate 304. The proximaldrive rod segment 492 is supported in thedrive yoke 372 and has a pair ofretainer balls 394 thereon such that shifting of thedrive yoke 372 on thetool mounting plate 304 results in the axial movement of the proximaldrive rod segment 492. In at least one example form, thefifth drive system 370 further includes adrive solenoid 474 that operably interfaces with thedrive yoke 472. Thedrive solenoid 474 receives control power from therobotic controller 12. Actuation of thedrive solenoid 474 in a first direction will cause thedrive rod assembly 490 to move in the distal direction “DD” and actuation of thedrive solenoid 474 in a second direction will cause thedrive rod assembly 490 to move in the proximal direction “PD”. As can be seen inFIG. 5 , theend effector 3000 includes a jaw members that are movable between open and closed positions upon application of axial closure motions to a closure system. In the illustrated embodiment of FIGS. 5 and 16-21, thefifth drive system 470 is employed to generate such closure motions. Thus, thefifth drive system 470 may also be referred to as a “closure drive”. - The
surgical tool 100 depicted in FIGS. 5 and 16-21 includes an articulation joint 3500 that cooperates with the third andfourth drive systems end effector 3000 about the longitudinal tool axis “LT”. The articulation joint 3500 includes aproximal socket tube 3502 that is attached to thedistal end 233 of the distalouter tube portion 231 and defines aproximal ball socket 3504 therein. SeeFIG. 24 . Aproximal ball member 3506 is movably seated within theproximal ball socket 3504. As can be seen inFIG. 24 , theproximal ball member 3506 has acentral drive passage 3508 that enables the distaldrive shaft segment 3740 to extend therethrough. In addition, theproximal ball member 3506 has fourarticulation passages 3510 therein which facilitate the passage ofdistal cable segments distal cable segments cable end portions FIG. 24A . As can be further seen inFIG. 24 , the articulation joint 3500 further includes an intermediatearticulation tube segment 3512 that has anintermediate ball socket 3514 formed therein. Theintermediate ball socket 3514 is configured to movably support therein anend effector ball 3522 formed on an endeffector connector tube 3520. Thedistal cable segments cable passages 3524 formed in theend effector ball 3522 and are attached thereto bylugs 3526 received withincorresponding passages 3528 in theend effector ball 3522. Other attachment arrangements may be employed for attachingdistal cable segments end effector ball 3522. - A unique and novel rotary support joint assembly, generally designated as 3540, is depicted in
FIGS. 25 and 26 . The illustrated rotary supportjoint assembly 3540 includes aconnector portion 4012 of the endeffector drive housing 4010 that is substantially cylindrical in shape. A firstannular race 4014 is formed in the perimeter of the cylindrically-shapedconnector portion 4012. The rotary supportjoint assembly 3540 further comprises adistal socket portion 3530 that is formed in the endeffector connector tube 3520 as shown inFIGS. 25 and 26 . Thedistal socket portion 3530 is sized relative to thecylindrical connector portion 4012 such that theconnector portion 4012 can freely rotate within thesocket portion 3530. A secondannular race 3532 is formed in aninner wall 3531 of thedistal socket portion 3530. Awindow 3533 is provided through thedistal socket 3530 that communicates with the secondannular race 3532 therein. As can also be seen inFIGS. 25 and 26 , the rotary supportjoint assembly 3540 further includes a ring-like bearing 3534. In various example embodiments, the ring-like bearing 3534 comprises a plastic deformable substantially-circular ring that has a cut 3535 therein. The cut formsfree ends 3536, 3537 in the ring-like bearing 3534. As can be seen inFIG. 25 , the ring-like bearing 3534 has a substantially annular shape in its natural unbiased state. - To couple a surgical end effector 3000 (e.g., a first portion of a surgical tool) to the articulation joint 3500 (e.g., a second portion of a surgical tool), the cylindrically shaped
connector position 4012 is inserted into thedistal socket portion 3530 to bring the secondannular race 3532 into substantial registry with the firstannular race 4014. One of the free ends 3536, 3537 of the ring-like bearing is then inserted into the registeredannular races window 3533 in thedistal socket portion 3530 of the endeffector connector tube 3520. To facilitate easy insertion, the window oropening 3533 has a taperedsurface 3538 formed thereon. SeeFIG. 25 . The ring-like bearing 3534 is essentially rotated into place and, because it tends to form a circle or ring, it does not tend to back out through thewindow 3533 once installed. Once the ring-like bearing 3534 has been inserted into the registeredannular races effector connector tube 3520 will be rotatably affixed to theconnector portion 4012 of the endeffector drive housing 4010. Such arrangement enables the endeffector drive housing 4010 to rotate about the longitudinal tool axis LT-LT relative to the endeffector connector tube 3520. The ring-like bearing 3534 becomes the bearing surface that the endeffector drive housing 4010 then rotates on. Any side loading tries to deform the ring-like bearing 3534 which is supported and contained by the two interlockingraces like bearing 3534. It will be understood that such simple and effective joint assembly employing the ring-like bearing 3534 forms a highly lubricious interface between therotatable portions FIG. 26 ), the rotary supportjoint assembly 3540 may be disassembled by withdrawing the ring-like bearing member 3532 out through thewindow 3533. The rotary supportjoint assembly 3540 allows for easy assembly and manufacturing while also providing for good end effector support while facilitating rotary manipulation thereof. - The articulation joint 3500 facilitates articulation of the
end effector 3000 about the longitudinal tool axis LT. For example, when it is desirable to articulate theend effector 3000 in a first direction “FD” as shown inFIG. 5 , therobotic system 10 may power thethird drive system 430 such that the third drive spindle assembly 436 (FIGS. 16-18 ) is rotated in a first direction thereby drawing the proximalcable end portion 434A and ultimatelydistal cable segment 444 in the proximal direction “PD” and releasing the proximalcable end portion 434B anddistal cable segment 445 to thereby cause theend effector ball 3522 to rotate within thesocket 3514. Likewise, to articulate theend effector 3000 in a second direction “SD” opposite to the first direction FD, therobotic system 10 may power thethird drive system 430 such that the thirddrive spindle assembly 436 is rotated in a second direction thereby drawing the proximalcable end portion 434B and ultimatelydistal cable segment 445 in the proximal direction “PD” and releasing the proximalcable end portion 434A anddistal cable segment 444 to thereby cause theend effector ball 3522 to rotate within thesocket 3514. When it is desirable to articulate theend effector 3000 in a third direction “TD” as shown inFIG. 5 , therobotic system 10 may power thefourth drive system 450 such that the fourthdrive spindle assembly 456 is rotated in a third direction thereby drawing the proximalcable end portion 454A and ultimatelydistal cable segment 446 in the proximal direction “PD” and releasing the proximalcable end portion 454B anddistal cable segment 447 to thereby cause theend effector ball 3522 to rotate within thesocket 3514. Likewise, to articulate theend effector 3000 in a fourth direction “FTH” opposite to the third direction TD, therobotic system 10 may power thefourth drive system 450 such that the fourthdrive spindle assembly 456 is rotated in a fourth direction thereby drawing the proximalcable end portion 454B and ultimatelydistal cable segment 447 in the proximal direction “PD” and releasing the proximalcable end portion 454A anddistal cable segment 446 to thereby cause theend effector ball 3522 to rotate within thesocket 3514. - The end effector embodiment depicted in FIGS. 5 and 16-21 employs rotary and longitudinal motions that are transmitted from the
tool mounting portion 300 through the elongate shaft assembly for actuation. The drive shaft assembly employed to transmit such rotary and longitudinal motions (e.g., torsion, tension and compression motions) to the end effector is relatively flexible to facilitate articulation of the end effector about the articulation joint.FIGS. 27-28 illustrate an alternativedrive shaft assembly 3600 that may be employed in connection with the embodiment illustrated in FIGS. 5 and 16-21 or in other embodiments. In the embodiment depicted inFIG. 5 the proximaldrive shaft segment 380 comprises a segment ofdrive shaft assembly 3600 and the distaldrive shaft segment 3740 similarly comprises another segment ofdrive shaft assembly 3600. Thedrive shaft assembly 3600 includes adrive tube 3602 that has a series of annularjoint segments 3604 cut therein. In that illustrated embodiment, thedrive tube 3602 comprises a distal portion of the proximaldrive shaft segment 380. For example, theshaft assembly 3600, as well as theshaft assemblies 3600′, 3600″ described herein with respect toFIGS. 27-45 may be components of and/or mechanically coupled to various rotary drive shafts described herein including, for example,rotary drive shafts - The
drive tube 3602 comprises a hollow metal tube (stainless steel, titanium, etc.) that has a series of annularjoint segments 3604 formed therein. The annularjoint segments 3604 comprise a plurality of loosely interlockingdovetail shapes 3606 that are, for example, cut into thedrive tube 3602 by a laser and serve to facilitate flexible movement between the adjoiningjoint segments 3604. SeeFIG. 28 . Such laser cutting of a tube stock creates a flexible hollow drive tube that can be used in compression, tension and torsion. Such arrangement employs a full diametric cut that is interlocked with the adjacent part via a “puzzle piece” configuration. These cuts are then duplicated along the length of the hollow drive tube in an array and are sometimes “clocked” or rotated to change the tension or torsion performance. -
FIGS. 29-33 illustrate alternative example micro-annularjoint segments 3604′ that comprise plurality of laser cutshapes 3606′ that roughly resemble loosely interlocking, opposed “T” shapes and T-shapes with a notched portion therein. The annularjoint segments joint segment FIGS. 29-30 , thejoint segment 3604D′ on thedistal end 3603 of thedrive tube 3602 has a distalmounting collar portion 3608D that facilitates attachment to other drive components for actuating the end effector or portions of the quick disconnect joint, etc. and thejoint segment 3604P′ on the proximal end 605 of thedrive tube 3602 has a proximalmounting collar portion 3608P′ that facilitates attachment to other proximal drive components or portions of the quick disconnect joint. - The joint-to-joint range of motion for each particular
drive shaft assembly 3600 can be increased by increasing the spacing in the laser cuts. For example, to ensure that thejoint segments 3604′ remain coupled together without significantly diminishing the drive tube's ability to articulate through desired ranges of motion, a secondary constrainingmember 3610 is employed. In the embodiment depicted inFIGS. 31-32 , the secondary constrainingmember 3610 comprises aspring 3612 or other helically-wound member. In various example embodiments, thedistal end 3614 of thespring 3612 corresponds to the distalmounting collar portion 3608D and is wound tighter than thecentral portion 3616 of thespring 3612. Similarly, theproximal end 618 of thespring 3612 is wound tighter than thecentral portion 3616 of thespring 3612. In other embodiments, the constrainingmember 3610 is installed on thedrive tube 3602 with a desired pitch such that the constraining member also functions, for example, as a flexible drive thread for threadably engaging other threaded control components on the end effector and/or the control system. It will also be appreciated that the constraining member may be installed in such a manner as to have a variable pitch to accomplish the transmission of the desired rotary control motions as the drive shaft assembly is rotated. For example, the variable pitch arrangement of the constraining member may be used to enhance open/close and firing motions which would benefit from differing linear strokes from the same rotation motion. In other embodiments, for example, the drive shaft assembly comprises a variable pitch thread on a hollow flexible drive shaft that can be pushed and pulled around a ninety degree bend. In still other embodiments, the secondary constraining member comprises an elastomeric tube orcoating 3611 applied around the exterior or perimeter of thedrive tube 3602 as illustrated inFIG. 33A . In still another embodiment, for example, the elastomeric tube orcoating 3611′ is installed in the hollow passageway 613 formed within thedrive tube 3602 as shown inFIG. 33B . - Such drive shaft arrangements comprise a composite torsional drive axle which allows superior load transmission while facilitating a desirable axial range of articulation. See, e.g., FIGS. 33 and 33A-33B. That is, these composite drive shaft assemblies allow a large range of motion while maintaining the ability to transmit torsion in both directions as well as facilitating the transmission of tension and compression control motions therethrough. In addition, the hollow nature of such drive shaft arrangements facilitate passage of other control components therethrough while affording improved tension loading. For example, some other embodiments include a flexible internal cable that extends through the drive shaft assembly which can assist in the alignment of the joint segments while facilitating the ability to apply tension motions through the drive shaft assembly. Moreover, such drive shaft arrangements are relatively easily to manufacture and assemble.
-
FIGS. 34-37 depict asegment 3620 of adrive shaft assembly 3600′. This embodiment includesjoint segments joint segments cuts 3626 are radial and are somewhat tapered. For example, each of thelug portions 3628 has a taperedouter perimeter portion 3629 that is received within asocket 3630 that has a tapered inner wall portion. See, e.g.,FIGS. 35 and 37 . Thus, there is no assembly required to attach thejoint segments joint segment 3622 has opposingpivot lug portions 3628 cut on each end thereof that are pivotally received in correspondingsockets 3630 formed in adjacentjoint segments 3624. -
FIGS. 34-37 illustrate a small segment of thedrive shaft assembly 3600′. Those of ordinary skill in the art will appreciate that the lugs/sockets may be cut throughout the entire length of the drive shaft assembly. That is, thejoint segments 3624 may have opposingsockets 3630 cut therein to facilitate linkage with adjoiningjoint segments 3622 to complete the length of thedrive shaft assembly 3600′. In addition, thejoint segments 3624 have anangled end portion 3632 cut therein to facilitate articulation of thejoint segments 3624 relative to thejoint segments 3622 as illustrated inFIGS. 36-37 . In the illustrated embodiment, eachlug 3628 has anarticulation stop portion 3634 that is adapted to contact acorresponding articulation stop 3636 formed in thejoint segment 3622. SeeFIGS. 36-37 . Other embodiments, which may otherwise be identical to thesegment 3620, are not provided with thearticulation stop portions 3634 and stops 3636. - As indicated above, the joint-to-joint range of motion for each particular drive shaft assembly can be increased by increasing the spacing in the laser cuts. In such embodiments, to ensure that the
joint segments coating 3640 is employed. Other embodiments employ other forms of constraining members disclosed herein and their equivalent structures. As can be seen inFIG. 34 , thejoint segments corresponding sockets 3630. To obtain an expanded range of articulation, thedrive shaft assembly 3600′ may be rotated about the tool axis TL-TL while pivoting about the pivot axes PA-PA. -
FIGS. 38-43 depict asegment 3640 of anotherdrive shaft assembly 3600″. Thedrive shaft assembly 3600″ comprises a multi-segment drive system that includes a plurality of interconnectedjoint segments 3642 that form a flexiblehollow drive tube 3602″. Ajoint segment 3642 includes aball connector portion 3644 and asocket portion 3648. Eachjoint segment 3642 may be fabricated by, for example, metal injection molding “MIM” and be fabricated from 17-4, 17-7, 420 stainless steel. Other embodiments may be machined from 300 or 400 series stainless steel, 6065 or 7071 aluminum or titanium. Still other embodiments could be molded out of plastic infilled or unfilled Nylon, Ultem, ABS, Polycarbonate or Polyethylene, for example. As can be seen in the Figures, theball connector 3644 is hexagonal in shape. That is, theball connector 3644 has sixarcuate surfaces 3646 formed thereon and is adapted to be rotatably received in like-shapedsockets 3650. Eachsocket 3650 has a hexagonally-shapedouter portion 3652 formed from sixflat surfaces 3654 and a radially-shapedinner portion 3656. SeeFIG. 41 . Eachjoint segment 3642 is identical in construction, except that the socket portions of the last joint segments forming the distal and proximal ends of thedrive shaft assembly 3600 may be configured to operably mate with corresponding control components. Eachball connector 3644 has ahollow passage 3645 therein that cooperate to form ahollow passageway 3603 through the hollowflexible drive tube 3602″. - As can be seen in
FIGS. 42 and 43 , the interconnectedjoint segments 3642 are contained within a constrainingmember 3660 which comprises a tube or sleeve fabricated from a flexible polymer material, for example.FIG. 44 illustrates a flexibleinner core member 3662 extending through the interconnectedjoint segments 3642. Theinner core member 3662 comprises a solid member fabricated from a polymer material or a hollow tube or sleeve fabricated from a flexible polymer material.FIG. 45 illustrates another embodiment wherein a constrainingmember 3660 and aninner core member 3662 are both employed. - Drive
shaft assembly 3600″ facilitates transmission of rotational and translational motion through a variable radius articulation joint. The hollow nature of thedrive shaft assembly 3600″ provides room for additional control components or a tensile element (e.g., a flexible cable) to facilitate tensile and compressive load transmission. In other embodiments, however, thejoint segments 3624 do not afford a hollow passage through the drive shaft assembly. In such embodiments, for example, the ball connector portion is solid. Rotary motion is translated via the edges of the hexagonal surfaces. Tighter tolerances may allow greater load capacity. Using a cable or other tensile element through the centerline of thedrive shaft assembly 3600″, the entiredrive shaft assembly 3600″ can be rotated bent, pushed and pulled without limiting range of motion. For example, thedrive shaft assembly 3600″ may form an arcuate drive path, a straight drive path, a serpentine drive path, etc. - While the various example embodiments described herein are configured to operably interface with and be at least partially actuated by a robotic system, the various end effector and elongate shaft components described herein, may be effectively employed in connection with handheld tools. For example,
FIGS. 46-47 depict a handheldsurgical tool 2400 that may employ various components and systems described above to operably actuate anelectrosurgical end effector 3000 coupled thereto. It will be appreciated that the handheldsurgical tool 2400 may contain and/or be electrically connected to a generator, such as thegenerator 3002, for generating an electrosurgical drive signal to drive theend effector 300. In the example embodiment depicted inFIGS. 46-47 , a quick disconnect joint 2210 is employed to couple theend effector 3000 to anelongate shaft assembly 2402. For example, the quick disconnect joint 2210 may operate to remove theend effector 3000 in the manner described herein with reference toFIGS. 106-115 . To facilitate articulation of theend effector 3000 about the articulation joint 3500, the proximal portion of theelongate shaft assembly 2402 includes an example manuallyactuatable articulation drive 2410. - Referring now to
FIGS. 48-50 , in at least one example form, thearticulation drive 2410 includes four axially movable articulation slides that are movably journaled on the proximaldrive shaft segment 380′ between the proximal outer tube segment 2214 and the proximaldrive shaft segment 380′. For example, thearticulation cable segment 434A′ is attached to afirst articulation slide 2420 that has a firstarticulation actuator rod 2422 protruding therefrom.Articulation cable segment 434B′ is attached to asecond articulation slide 2430 that is diametrically opposite from thefirst articulation slide 2420. Thesecond articulation slide 2430 has a secondarticulation actuator rod 2432 protruding therefrom.Articulation cable segment 454A′ is attached to athird articulation slide 2440 that has a thirdarticulation actuator rod 2442 protruding therefrom.Articulation cable segment 454B′ is attached to afourth articulation slide 2450 that is diametrically opposite to thethird articulation slide 2440. A fourtharticulation actuator rod 2452 protrudes from thefourth articulation slide 2450.Articulation actuator rods articulation ring assembly 2460. - As can be seen in
FIG. 48 , thearticulation actuator rods ball 2470 that is journaled on a proximalouter tube segment 2404. In at least one embodiment, the mountingball 2470 may be manufactured in segments that are attached together by appropriate fastener arrangements (e.g., welding, adhesive, screws, etc.). As shown inFIG. 50 , thearticulation actuator rods slots 2472 in the proximalouter tube segment 2404 andslots 2474 in the mountingball 2470 to enable the articulation slides 2420, 2430 to axially move relative thereto. Although not shown, thearticulation actuator rods similar slots outer tube segment 2404 and the mountingball 2470. Each of thearticulation actuator rods slots 2474 in the mountingball 2470 to be operably received within corresponding mountingsockets 2466 in thearticulation ring assembly 2460. SeeFIG. 49 . - In at least one example form, the
articulation ring assembly 2460 is fabricated from a pair ofring segments articulation ring assembly 2460. Thering segments sockets 2466. Each of the articulation actuator rods has a mountingball 2468 formed thereon that are each adapted to be movably received within a corresponding mountingsocket 2466 in thearticulation ring assembly 2460. - Various example embodiments of the
articulation drive 2410 may further include anexample locking system 2486 configured to retain thearticulation ring assembly 2460 in an actuated position. In at least one example form, thelocking system 2486 comprises a plurality of locking flaps formed on thearticulation ring assembly 2460. For example, thering segments Ring segment 2480 has a series of flexible proximal locking flaps 2488 formed therein andring segment 2490 has a series of flexible distal locking flaps 2498 formed therein. Each locking flap 2388 has at least one locking detent 2389 formed thereon and each locking flap 2398 has at least one locking detent 2399 thereon. Locking detents 2389, 2399 may serve to establish a desired amount of locking friction with the articulation ball so as to retain the articulation ball in position. In other example embodiments, the locking detents 2389, 2390 are configured to matingly engage various locking dimples formed in the outer perimeter of the mountingball 2470. - Operation of the
articulation drive 2410 can be understood from reference toFIGS. 49 and 50 .FIG. 49 illustrates thearticulation drive 2410 in an unarticulated position. InFIG. 50 , the clinician has manually tilted thearticulation ring assembly 2460 to cause thearticulation slide 2420 to move axially in the distal direction “DD” thereby advancing thearticulation cable segment 434A′ distally. Such movement of thearticulation ring assembly 2460 also results in the axial movement of thearticulation slide 2430 in the proximal direction which ultimately pulls thearticulation cable 434B in the proximal direction. Such pushing and pulling of thearticulation cable segments 434A′, 434B′ will result in articulation of theend effector 3000 relative to the longitudinal tool axis “LT-LT” in the manner described above. To reverse the direction of articulation, the clinician simply reverses the orientation of thearticulation ring assembly 2460 to thereby cause thearticulation slide 2430 to move in the distal direction “DD” and thearticulation slide 2420 to move in the proximal direction “PD”. Thearticulation ring assembly 2460 may be similarly actuated to apply desired pushing and pulling motions to thearticulation cable segments 454A′, 454B′. The friction created between the locking detents 2389, 2399 and the outer perimeter of the mounting ball serves to retain thearticulation drive 2410 in position after theend effector 3000 has been articulated to the desired position. In alternative example embodiments, when the locking detents 2389, 2399 are positioned so as to be received in corresponding locking dimples in the mounting ball, the mounting ball will be retained in position. - In the illustrated example embodiments and others, the
elongate shaft assembly 2402 operably interfaces with ahandle assembly 2500. An example embodiment ofhandle assembly 2500 comprises a pair ofhandle housing segments FIG. 46 . Thehandle housing segments handle segments handle assembly 2500 that includes apistol grip portion 2506. - To facilitate selective rotation of the
end effector 3000 about the longitudinal tool axis “LT=LT”, theelongate shaft assembly 2402 may interface with a first drive system, generally designated as 2510. Thedrive system 2510 includes a manually-actuatable rotation nozzle 2512 that is rotatably supported on thehandle assembly 2500 such that it can be rotated relative thereto as well as be axially moved between a locked position and an unlocked position. - The
surgical tool 2400 may include aclosure system 3670. Theclosure system 3670 may be used in some embodiments to bring about distal and proximal motion in theelongate shaft assembly 2402 andend effector 3000. For example, in some embodiments, theclosure system 3670 may drive an axially movable member such as 3016. For example, theclosure system 3670 may be used to translate the axiallymovable member 3016 instead of the various rotary drive shafts described herein with respect toFIGS. 64-82 , 83-91 and 92-96. In this example embodiment, theclosure system 3670 is actuated by aclosure trigger 2530 that is pivotally mounted to thehandle frame assembly 2520 that is supported within thehandle housing segments closure trigger 2530 includes anactuation portion 2532 that is pivotally mounted on apivot pin 2531 that is supported within thehandle frame assembly 2520. SeeFIG. 51 . Such example arrangement facilitates pivotal travel toward and away from thepistol grip portion 2506 of thehandle assembly 2500. As can be seen inFIG. 51 , theclosure trigger 2530 includes aclosure link 2534 that is linked to the first pivot link andgear assembly 3695 by aclosure wire 2535. Thus, by pivoting theclosure trigger 2530 toward thepistol grip portion 2506 of thehandle assembly 2500 into an actuated position, theclosure link 2534 andclosure wire 2535 causes the first pivot link andgear assembly 3695 to move in the distal direction “DD” to cause distal motion through the shaft and, in some embodiments, to the end effector. - The
surgical tool 2400 may further include a closuretrigger locking system 2536 to retain the closure trigger in the actuated position. In at least one example form, the closuretrigger locking system 2536 includes aclosure lock member 2538 that is pivotally coupled to thehandle frame assembly 2520. As can be seen inFIGS. 52 and 53 , theclosure lock member 2538 has alock arm 2539 formed thereon that is configured to ride upon anarcuate portion 2537 of theclosure link 2532 as theclosure trigger 2530 is actuated toward thepistol grip portion 2506. When theclosure trigger 2530 has been pivoted to the fully actuated position, thelock arm 2539 drops behind the end of theclosure link 2532 and prevents theclosure trigger 2530 from returning to its unactuated position. Thus, the distal motion translated through the shaft assembly to the end effector may be locked. To enable theclosure trigger 2530 to return to its unactuated position, the clinician simply pivots theclosure lock member 2538 until thelock arm 2539 thereof disengages the end of theclosure link 2532 to thereby permit theclosure link 2532 to move to the unactuated position. - The
closure trigger 2532 is returned to the unactuated position by aclosure return system 2540. For example, as can be seen inFIG. 51 , one example form of the closuretrigger return system 2540 includes a closuretrigger slide member 2542 that is linked to theclosure link 2534 by aclosure trigger yoke 2544. The closuretrigger slide member 2542 is slidably supported within a slide cavity 2522 in thehandle frame assembly 2520. A closuretrigger return spring 2546 is positioned within theslide cavity 2520 to apply a biasing force to the closuretrigger slide member 2542. Thus, when the clinician actuates theclosure trigger 2530, theclosure trigger yoke 2544 moves the closuretrigger slide member 2542 in the distal direction “DD” compressing the closuretrigger return spring 2546. When the closuretrigger locking system 2536 is disengaged and the closure trigger is released 2530, the closuretrigger return spring 2546 moves the closuretrigger slide member 2542 in the proximal direction “PD” to thereby pivot theclosure trigger 2530 into the starting unactuated position. - The
surgical tool 2400 can also employ any of the various example drive shaft assemblies described above. In at least one example form, thesurgical tool 2400 employs asecond drive system 2550 for applying rotary control motions to a proximaldrive shaft assembly 380′. SeeFIG. 55 . Thesecond drive system 2550 may include amotor assembly 2552 that is operably supported in thepistol grip portion 2506. Themotor assembly 2552 may be powered by a battery pack 2554 that is removably attached to thehandle assembly 2500 or it may be powered by a source of alternating current. Asecond drive gear 2556 is operably coupled to thedrive shaft 2555 of themotor assembly 2552. Thesecond drive gear 2556 is supported for meshing engagement with a second rotary drivengear 2558 that is attached to the proximaldrive shaft segment 380′ of the drive shaft assembly. In at least one form, for example, thesecond drive gear 2556 is also axially movable on themotor drive shaft 2555 relative to themotor assembly 2552 in the directions represented by arrow “U” inFIG. 55 . A biasing member, e.g., a coil spring 2560 or similar member, is positioned between thesecond drive gear 2556 and themotor housing 2553 and serves to bias thesecond drive gear 2556 on themotor drive shaft 2555 into meshing engagement with afirst gear segment 2559 on the second drivengear 2558. - The
second drive system 2550 may further include a firingtrigger assembly 2570 that is movably, e.g., pivotally attached to thehandle frame assembly 2520. In at least one example form, for example, the firingtrigger assembly 2570 includes a firstrotary drive trigger 2572 that cooperates with a corresponding switch/contact (not shown) that electrically communicates with themotor assembly 2552 and which, upon activation, causes themotor assembly 2552 to apply a first rotary drive motion to the second drivengear 2558. In addition, the firingtrigger assembly 2570 further includes aretraction drive trigger 2574 that is pivotal relative to the first rotary drive trigger. Theretraction drive trigger 2574 operably interfaces with a switch/contact (not shown) that is in electrical communication with themotor assembly 2552 and which, upon activation, causes themotor assembly 2552 to apply a second rotary drive motion to the second drivengear 2558. The first rotary drive motion results in the rotation of the drive shaft assembly and the implement drive shaft in the end effector to cause the firing member to move distally in theend effector 3000. Conversely, the second rotary drive motion is opposite to the first rotary drive motion and will ultimately result in rotation of the drive shaft assembly and the implement drive shaft in a rotary direction which results in the proximal movement or retraction of the firing member in theend effector 3000. - The illustrated embodiment also includes a manually
actuatable safety member 2580 that is pivotally attached to the closuretrigger actuation portion 2532 and is selectively pivotable between a first “safe” position wherein thesafety member 2580 physically prevents pivotal travel of the firingtrigger assembly 2570 and a second “off” position, wherein the clinician can freely pivot the firingtrigger assembly 2570. As can be seen inFIG. 51 , afirst dimple 2582 is provided in the closuretrigger actuation portion 2532 that corresponds to the first position of thesafety member 2580. When thesafety member 2580 is in the first position, a detent (not shown) on thesafety member 2580 is received within thefirst dimple 2582. Asecond dimple 2584 is also provided in the closuretrigger actuation portion 2532 that corresponds to the second position of thesafety member 2580. When thesafety member 2580 is in the second position, the detent on thesafety member 2580 is received within thesecond dimple 2582. - In at least some example forms, the
surgical tool 2400 may include a mechanically actuatable reversing system, generally designated as 2590, for mechanically applying a reverse rotary motion to the proximaldrive shaft segment 380′ in the event that themotor assembly 2552 fails or battery power is lost or interrupted. Such mechanical reversingsystem 2590 may also be particularly useful, for example, when the drive shaft system components operably coupled to the proximaldrive shaft segment 380′ become jammed or otherwise bound in such a way that would prevent reverse rotation of the drive shaft components under the motor power alone. In at least one example form, the mechanically actuatable reversingsystem 2590 includes a reversinggear 2592 that is rotatably mounted on ashaft 2524A formed on thehandle frame assembly 2520 in meshing engagement with asecond gear segment 2562 on the second drivengear 2558. SeeFIG. 53 . Thus, the reversinggear 2592 freely rotates onshaft 2524A when the second drivengear 2558 rotates the proximaldrive shaft segment 380′ of the drive shaft assembly. - In various example forms, the mechanical reversing
system 2590 further includes a manuallyactuatable driver 2594 in the form of alever arm 2596. As can be seen inFIGS. 56 and 57 , thelever arm 2596 includes ayoke portion 2597 that haselongate slots 2598 therethrough. Theshaft 2524A extends throughslot 2598A and a second opposingshaft 2598B formed on thehandle housing assembly 2520 extends through the other elongate slot to movably affix thelever arm 2596 thereto. In addition, thelever arm 2596 has anactuator fin 2597 formed thereon that can meshingly engage the reversinggear 2592. There is a detent or interference that keeps thelever arm 2596 in the unactuated state until the clinician exerts a substantial force to actuate it. This keeps it from accidentally initiating if inverted. Other embodiments may employ a spring to bias the lever arm into the unactuated state. Various example embodiments of the mechanical reversingsystem 2590 further includes aknife retractor button 2600 that is movably journaled in thehandle frame assembly 2520. As can be seen inFIGS. 56 and 57 , theknife retractor button 2600 includes adisengagement flap 2602 that is configured to engage the top of thesecond drive gear 2556. Theknife retractor button 2600 is biased to a disengaged position by aknife retractor spring 2604. When in the disengaged position, thedisengagement flap 2602 is biased out of engagement with thesecond drive gear 2556. Thus, until the clinician desires to activate the mechanical reversingsystem 2590 by depressing theknife retractor button 2600, thesecond drive gear 2556 is in meshing engagement with thefirst gear segment 2559 of the second drivengear 2558. - When the clinician desires to apply a reverse rotary drive motion to the proximal
drive shaft segment 380′, the clinician depresses theknife retractor button 2600 to disengage thefirst gear segment 2559 on the second drivengear 2558 from thesecond drive gear 2556. Thereafter, the clinician begins to apply a pivotal ratcheting motion to the manuallyactuatable driver 2594 which causes thegear fin 2597 thereon to drive the reversinggear 2592. The reversinggear 2592 is in meshing engagement with thesecond gear segment 2562 on the second drivengear 2558. Continued ratcheting of the manuallyactuatable driver 2594 results in the application of a reverse rotary drive motion to thesecond gear segment 2562 and ultimately to the proximaldrive shaft segment 380′. The clinician may continue to ratchet thedriver 2594 for as many times as are necessary to fully release or reverse the associated end effector component(s). Once a desired amount of reverse rotary motion has been applied to the proximaldrive shaft segment 380′, the clinician releases theknife retractor button 2600 and thedriver 2594 to their respective starting or unactuated positions wherein thefin 2597 is out of engagement with the reversinggear 2592 and thesecond drive gear 2556 is once again in meshing engagement with thefirst gear segment 2559 on the second drivengear 2558. - The
surgical tool 2400 can also be employed with an electrosurgical end effector comprising various rotary drive components that are driven differently with a rotary drive shaft at different axial positions. Examples of such end effectors and drive mechanisms are described herein with respect toFIGS. 64-82 , 83-91 and 92-96. Thesurgical tool 2400 may employ ashifting system 2610 for selectively axially shifting the proximaldrive shaft segment 380′ which moves theshaft gear 376 into and out of meshing engagement with the first rotary drivengear 374. For example, the proximaldrive shaft segment 380′ is movably supported within thehandle frame assembly 2520 such that the proximaldrive shaft segment 380′ may move axially and rotate therein. In at least one example form, theshifting system 2610 further includes ashifter yoke 2612 that is slidably supported by thehandle frame assembly 2520. SeeFIGS. 51 and 54 . The proximaldrive shaft segment 380′ has a pair of collars 386 (shown inFIGS. 51 and 55 ) thereon such that shifting of theshifter yoke 2612 on thehandle frame assembly 2520 results in the axial movement of the proximaldrive shaft segment 380′. In at least one form, theshifting system 2610 further includes ashifter button assembly 2614 operably interfaces with theshifter yoke 2612 and extends through aslot 2505 in thehandle housing segment 2504 of thehandle assembly 2500. SeeFIGS. 62 and 63 . Ashifter spring 2616 is mounted with thehandle frame assembly 2520 such that it engages the proximaldrive shaft segment 380′. SeeFIGS. 54 and 61 . Thespring 2616 serves to provide the clinician with an audible click and tactile feedback as theshifter button assembly 2614 is slidably positioned between the first axial position depicted inFIG. 62 wherein rotation of the drive shaft assembly results in rotation of theend effector 3000 about the longitudinal tool axis “LT-LT” relative to the articulation joint 3500 (illustrated inFIG. 67 ) and the second axial position depicted inFIG. 63 wherein rotation of the drive shaft assembly results in the axial movement of the firing member in the end effector (illustrated inFIG. 66 ). Thus, such arrangement enables the clinician to easily slidably position theshifter button assembly 2614 while holding thehandle assembly 2500. In some embodiments, theshifter button assembly 2500 may have more than two axial positions, corresponding to more than two desired axial positions of the rotary drive shaft. Examples of such surgical tools are provided herein in conjunction withFIGS. 83-91 and 92-96. - Referring to
FIGS. 64-72 , a multi-axis articulating and rotatingsurgical tool 600 comprises anend effector 550 comprising afirst jaw member 602A and asecond jaw member 602B. Thefirst jaw member 602A is movable relative to thesecond jaw member 602B between an open position (FIGS. 64 , 66-69, 71) and a closed position (FIGS. 70 and 72 ) to clamp tissue between thefirst jaw member 602A and thesecond jaw member 602B. Thesurgical tool 600 is configured to independently articulate about an articulation joint 640 in a vertical direction (labeled direction V in FIGS. 64 and 66-72) and a horizontal direction (labeled direction H in FIGS. 64 and 65-68). Actuation of the articulation joint 640 may be brought about in a manner similar to that described above with respect toFIGS. 24-26 . Thesurgical tool 600 is configured to independently rotate about a head rotation joint 645 in a longitudinal direction (labeled direction H in FIGS. 64 and 66-72). Theend effector 550 comprises an I-beam member 620 and ajaw assembly 555 comprising thefirst jaw member 602A, thesecond jaw member 602B, aproximal portion 603 of thesecond jaw member 602B, and arotary drive nut 606 seated in theproximal portion 603. The I-beam member 620 andjaw assembly 555 may operate in a manner described herein and similar to that described above with respect to the axiallymovable member 3016 andjaw members - The
end effector 550 is coupled to ashaft assembly 560 comprising an endeffector drive housing 608, an endeffector connector tube 610, an intermediatearticulation tube segment 616, and a distalouter tube portion 642. Theend effector 550 and theshaft assembly 560 together comprise thesurgical tool 600. Theend effector 550 may be removably coupled to the endeffector drive housing 608 using a mechanism as described, for example, in connection withFIGS. 106-115 . The endeffector connector tube 610 comprises acylindrical portion 612 and aball member 614. The endeffector drive housing 608 is coupled to thecylindrical portion 612 of the endeffector connector tube 610 through the head rotation joint 645. Theend effector 550 and the endeffector drive housing 608 together comprise ahead portion 556 of thesurgical tool 600. Thehead portion 556 of thesurgical tool 600 is independently rotatable about the head rotation joint 645, as described in greater detail below. - The intermediate
articulation tube segment 616 comprises aball member 618 and aball socket 619. The endeffector connector tube 610 is coupled to the intermediatearticulation tube segment 616 through a ball-and-socket joint formed by the mutual engagement of theball member 614 of the endeffector connector tube 610 and theball socket 619 of the intermediatearticulation tube segment 616. The intermediatearticulation tube segment 616 is coupled to the distalouter tube portion 642 through a ball-and-socket joint formed by the mutual engagement of theball member 618 of the intermediatearticulation tube segment 616 and a ball socket of the distalouter tube portion 642. The articulation joint 640 comprises the endeffector connector tube 610, the intermediatearticulation tube segment 616, and the distalouter tube portion 642. The independent vertical articulation and/or horizontal articulation of thesurgical tool 600 about the articulation joint 640 may be actuated, for example, using independently actuatable cable segments, such as 444, 445, 446, 447 described herein above, connected to theball member 614 of the endeffector connector tube 610. This independent articulation functionality is described, for example, in connection withFIGS. 24 , 24A and 25. Robotic and hand-held apparatuses for allowing a clinician to initiate articulation functionality are described, for example, in connection withFIGS. 6 , 16-21 and 46-50. - The movement of the
first jaw member 602A relative to thesecond jaw member 602B between an open position (FIGS. 64 , 66-69, and 71) and a closed position (FIGS. 70 and 72 ) may be actuated with a suitable closure actuation mechanism. Referring toFIGS. 73 and 74 , closure of thejaw assembly 555 may be actuated by translation of the I-beam member 620. The I-beam member 620 comprises a first I-beam flange 622A and a second I-beam flange 622B. The first I-beam flange 622A and the second I-beam flange 622B are connected with anintermediate portion 624. Theintermediate portion 624 of the I-beam member 620 comprises a cuttingmember 625, which is configured to transect tissue clamped between thefirst jaw member 602A and thesecond jaw member 602B when thejaw assembly 555 is in a closed position. The I-beam member 620 is configured to translate within afirst channel 601A in thefirst jaw member 602A and within asecond channel 601B in thesecond jaw member 602B. Thefirst channel 601A comprises afirst channel flange 605A, and thesecond channel 601B comprises asecond channel flange 605B. The first I-beam flange 622A can define afirst cam surface 626A, and the second I-beam flange 622B can define asecond cam surface 626B. The first and second cam surfaces 626A and 626B can slidably engage outwardly-facing opposed surfaces of the first andsecond channel flanges first cam surface 626A can comprise a suitable profile configured to slidably engage the opposed surface of thefirst channel flange 605A of thefirst jaw member 602A and, similarly, thesecond cam surface 626B can comprise a suitable profile configured to slidably engage the opposed surface of thesecond channel flange 605B of thesecond jaw member 602B, such that, as the I-beam member 620 is advanced distally, the cam surfaces 626A and 626B can co-operate to camfirst jaw member 602A towardsecond jaw member 602B and move thejaw assembly 555 from an open position to a closed position as indicated byarrow 629 inFIG. 74 . -
FIG. 73 shows the I-beam member 620 in a fully proximal position and thejaw assembly 555 in an open position. In the position shown inFIG. 73 , thefirst cam surface 626A is engaging a proximal portion of an arcuate-shapedanvil surface 628, which mechanically holds thefirst jaw member 602A open relative to thesecond jaw member 602B (FIGS. 69 and 71 ). Translation of the I-beam member 620 distally in a longitudinal direction (labeled direction L in FIGS. 64 and 66-74) results in sliding engagement of thefirst cam surface 626A with the length of the arcuate-shapedanvil surface 628, which camsfirst jaw member 602A towardsecond jaw member 602B until thefirst cam surface 626A is engaging a distal portion of the arcuate-shapedanvil surface 628. After the distal translation of the I-beam member 620 for a predetermined distance, thefirst cam surface 626A engages a distal portion of the arcuate-shapedanvil surface 628 and the jaw assembly is in the closed position (FIG. 74 ). Thereafter, the I-beam member 620 can be further translated distally in order to transect tissue clamped between thefirst jaw member 602A and thesecond jaw member 602B when in the closed position. - During distal translation of the I-
beam member 620 after closure of the jaw assembly, the first and second cam surfaces 626A and 626B of the first and second I-beam flanges second channel flanges second channels second jaw members - The distal, or leading, end of the I-
beam member 620 comprises a cuttingmember 625, which may be a sharp edge or blade configured to cut through clamped tissue during a distal translation stroke of the I-beam member, thereby transecting the tissue.FIGS. 72 and 70 show the I-beam member 620 in a fully distal position after a distal translation stroke. After a distal translation stroke, the I-beam member 620 may be proximally refracted back to the longitudinal position shown inFIG. 74 in which the jaw assembly remains closed, clamping any transected tissue between thefirst jaw member 602A and thesecond jaw member 602B. Further retraction of the I-beam member to the fully proximal position (FIGS. 69 , 71, and 73) will result in engagement of thefirst cam surface 626A and the proximal portion of theanvil surface 628, which cams thefirst jaw member 602A away from thesecond jaw member 602B, opening thejaw assembly 555. - Before, during, and/or after the I-
beam member 620 is advanced through tissue clamped between thefirst jaw member 602A and thesecond jaw member 602B, electrical current can be supplied to electrodes located in the first and/orsecond jaw members first jaw member 602A and thesecond jaw member 602B when in a closed position to weld/fuse the tissue. - Distal and proximal translation of the I-
beam member 620 between a proximally retracted position (FIGS. 64 , 66-69, 71, and 73), an intermediate position (FIG. 74 ), and a distally advanced position (FIGS. 70 and 72 ) may be accomplished with a suitable translation actuation mechanism. Referring toFIGS. 65-72 , the I-beam member 620 is connected to a threadedrotary drive member 604. A threadedrotary drive nut 606 is threaded onto the threadedrotary drive member 604. The threadedrotary drive nut 606 is seated in theproximal portion 603 of thesecond jaw member 602B. The threadedrotary drive nut 606 is mechanically constrained from translation in any direction, but the threadedrotary drive nut 606 is rotatable within theproximal portion 603 of thesecond jaw member 602B. Therefore, given the threaded engagement of therotary drive nut 606 and the threadedrotary drive member 604, rotational motion of therotary drive nut 606 is transformed into translational motion of the threadedrotary drive member 604 in the longitudinal direction and, in turn, into translational motion of the I-beam member 620 in the longitudinal direction. - The threaded
rotary drive member 604 is threaded through therotary drive nut 606 and is located inside a lumen of arotary drive shaft 630. The threadedrotary drive member 604 is not attached or connected to therotary drive shaft 630. The threadedrotary drive member 604 is freely movable within the lumen of therotary drive shaft 630 and will translate within the lumen of therotary drive shaft 630 when driven by rotation of therotary drive nut 606. Therotary drive shaft 630 comprising the threadedrotary drive member 604 located within the lumen of therotary drive shaft 630 forms a concentric rotary drive shaft/screw assembly that is located in the lumen of theshaft assembly 560. - As shown in
FIG. 65 , the endeffector drive housing 608, the endeffector connector tube 610, and the intermediatearticulation tube segment 616, which together comprise theshaft assembly 560, have open lumens and, therefore, the shaft assembly has a lumen, as shown inFIGS. 66-68 . Referring again toFIGS. 66-68 , the concentric rotary drive shaft/threaded rotary drive member assembly is located within the lumen of theshaft assembly 560 and passes through the endeffector drive housing 608, the endeffector connector tube 610, and the intermediatearticulation tube segment 616. Although not shown inFIGS. 66-68 , at least therotary drive shaft 630 passes through a lumen of the distalouter tube portion 642 and is operably coupled to a driving mechanism that provides rotational and axial translational motion to therotary drive shaft 630. For example, in some embodiments, thesurgical tool 600 may be operably coupled through theshaft assembly 560 to a robotic surgical system that provides rotational motion and axial translational motion to therotary drive shaft 630, such as, for example, the robotic surgical systems described in connection with FIGS. 5 and 16-21. For example, therotary drive shaft 630 may be operably coupled, through theshaft assembly 560, to the proximaldrive shaft segment 380 described herein above. Also, in some embodiments, thesurgical tool 600 may be utilized in conjunction with a hand-held surgical device, such as the device described herein above with respect toFIGS. 46-63 . For example, therotary drive shaft 630 may be operably coupled, though theshaft assembly 560, to the proximaldrive shaft segment 380′ described herein above. - The
rotary drive shaft 630 comprises arotary drive head 632. Therotary drive head 632 comprises a femalehex coupling portion 634 on the distal side of therotary drive head 632, and therotary drive head 632 comprises a malehex coupling portion 636 on the proximal side of therotary drive head 632. The distal femalehex coupling portion 634 of therotary drive head 632 is configured to mechanically engage with a malehex coupling portion 607 of therotary drive nut 606 located on the proximal side of therotary drive nut 606. The proximal malehex coupling portion 636 of therotary drive head 632 is configured to mechanically engage with a female hexshaft coupling portion 609 of the endeffector drive housing 608. - Referring to
FIGS. 66 , 67, 69, and 70, therotary drive shaft 630 is shown in a fully distal axial position in which the femalehex coupling portion 634 of therotary drive head 632 is mechanically engaged with the malehex coupling portion 607 of therotary drive nut 606. In this configuration, rotation of therotary drive shaft 630 actuates rotation of therotary drive nut 606, which actuates translation of the threadedrotary drive member 604, which actuates translation of the I-beam member 620. The orientation of the threading of the threadedrotary drive member 604 and therotary drive nut 606 may be established so that either clockwise or counterclockwise rotation of therotary drive shaft 630 will actuate distal or proximal translation of the threadedrotary drive member 604 and I-beam member 620. In this manner, the direction, speed, and duration of rotation of therotary drive shaft 630 can be controlled in order to control the direction, speed, and magnitude of the longitudinal translation of the I-beam member 620 and, therefore, the closing and opening of the jaw assembly and the transection stroke of the I-beam member along the first andsecond channels - Referring to
FIG. 69 , for example, rotation of therotary drive shaft 630 in a clockwise direction (as viewed from a proximal-to-distal vantage point) actuates clockwise rotation of therotary drive nut 606, which actuates distal translation of the threadedrotary drive member 604, which actuates distal translation of the I-beam member 620, which actuates closure of the jaw assembly and a distal transection stroke of the I-beam member 620/cuttingmember 625. Referring toFIG. 70 , for example, rotation of therotary drive shaft 630 in a counterclockwise direction (as viewed from a proximal-to-distal vantage point) actuates counterclockwise rotation of therotary drive nut 606, which actuates proximal translation of the threadedrotary drive member 604, which actuates proximal translation of the I-beam member 620, which actuates a proximal return stroke of the I-beam member 620/cuttingmember 625 and opening of the jaw assembly. In this manner, therotary drive shaft 630 may be used to independently actuate the opening and closing of the jaw assembly and the proximal-distal transection stroke of the I-beam 620/cuttingmember 625. - Referring to
FIGS. 68 , 71, and 72, therotary drive shaft 630 is shown in a fully proximal axial position in which the malehex coupling portion 636 of therotary drive head 632 is mechanically engaged with the female hexshaft coupling portion 609 of the endeffector drive housing 608. In this configuration, rotation of therotary drive shaft 630 actuates rotation of thehead portion 556 of thesurgical tool 600 about rotation joint 645, including rotation of theend effector 550 and the endeffector drive housing 608. In this configuration, the portion of thesurgical tool 600 that is distal to the head rotation joint 645 (i.e., thehead portion 556 of thesurgical tool 600, comprising theend effector 550 and the end effector drive housing 608) rotates with rotation of therotary drive shaft 630, and the portion of the surgical tool that is proximal to the head rotation joint 645 (e.g., the endeffector connector tube 610, the intermediatearticulation tube segment 616, and the distal outer tube portion 642) does not rotate with rotation of therotary drive shaft 630. It will be appreciated that a desired rotation speed of therotary drive shaft 630 to drive therotary drive nut 606 may be greater than a desired rotational speed for rotating thehead portion 556. For example, therotary drive shaft 630 may be driven by a motor (not shown) that is operable at different rotary speeds. - Referring to
FIG. 71 , for example, rotation of therotary drive shaft 630 in a clockwise direction (as viewed from a proximal-to-distal vantage point) actuates clockwise rotation of theend effector 550 and the end effector drive housing 608 (i.e., thehead portion 556 of the surgical tool 600) with thejaw assembly 555 in an open position. Rotation of therotary drive shaft 630 in a counterclockwise direction (as viewed from a proximal-to-distal vantage point) actuates counterclockwise rotation of theend effector 550 and the endeffector drive housing 608 with thejaw assembly 555 in an open position. Referring toFIG. 72 , for example, rotation of therotary drive shaft 630 in a clockwise direction (as viewed from a proximal-to-distal vantage point) actuates clockwise rotation of theend effector 550 and the endeffector drive housing 608 with thejaw assembly 555 in a closed position. Rotation of therotary drive shaft 630 in a counterclockwise direction (as viewed from a proximal-to-distal vantage point) actuates counterclockwise rotation of theend effector 550 and the endeffector drive housing 608 with thejaw assembly 555 in a closed position. Although not shown, it is understood that the I-beam member 620 may be located in an intermediate position where the jaw assembly is closed but the I-beam is not fully distally advanced (see, e.g.,FIG. 74 ) when therotary drive shaft 630 is in a fully proximal axial position and the malehex coupling portion 636 of therotary drive head 632 is mechanically engaged with the female hexshaft coupling portion 609 of the endeffector drive housing 608 to actuate rotation of the head portion of the surgical tool. - Thus, the
rotary drive shaft 630 may be used to independently actuate the opening and closing of the jaw assembly, the proximal-distal transection stroke of the I-beam 620/cuttingmember 625, and the rotation of thehead portion 556 of the surgical tool 600 d. - In various embodiments, a surgical tool may comprise an end effector, a first actuation mechanism, and a second actuation mechanism. The surgical tool may also comprise a clutch member configured to selectively engage and transmit rotary motion to either the first actuation mechanism or the second actuation mechanism. For example, in various embodiments, a clutch member may comprise a rotary drive shaft comprising a rotary drive head as described, for example, in connection with
FIGS. 64-72 . In various embodiments, a first actuation mechanism may comprise an I-beam member connected to a threaded rotary drive member threaded through a rotary drive nut, as described, for example, in connection withFIGS. 64-74 , wherein the I-beam, the threaded rotary drive member, and the rotary drive nut are configured to actuate the closing and opening of a jaw assembly and/or the translation of a cutting member. In various embodiments, a second actuation mechanism may comprise a shaft coupling portion, as described, for example, in connection withFIGS. 64-72 , wherein the shaft coupling portion is configured to actuate rotation of a head portion of a surgical tool. - In various embodiments, a surgical tool may comprise an end effector comprising a first jaw member, a second jaw member, and a first actuation mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The surgical tool may also comprise a shaft assembly proximal to the surgical end effector. The surgical tool may also comprise a rotary drive shaft. The rotary drive shaft may be configured to transmit rotary motions and may also be selectively moveable between a first position and a second position relative to the shaft assembly. The rotary drive shaft may be configured to engage and selectively transmit the rotary motions to the first actuation mechanism when in the first position and the rotary drive shaft may be configured to disengage from the actuation mechanism when in the second position. For example, in various embodiments, the first actuation mechanism may comprise an I-beam member connected to a threaded rotary drive member threaded through a rotary drive nut, as described, for example, in connection with
FIGS. 64-74 , wherein the I-beam, the threaded rotary drive member, and the rotary drive nut are configured to actuate the closing and opening of a jaw assembly when the rotary drive shaft engages and selectively transmits rotary motion to the drive nut. - In various embodiments, a surgical tool may comprise a surgical end effector comprising a first jaw member, a second jaw member, and a closure mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The surgical tool may also comprise a shaft assembly proximal to the surgical end effector, wherein the surgical end effector is configured to rotate relative to the shaft assembly. The surgical tool may also comprise a rotary drive shaft configured to transmit rotary motions, the rotary drive shaft selectively movable axially between a first position and a second position relative to the shaft assembly, wherein the rotary drive shaft is configured to apply the rotary motions to the closure mechanism when in the first axial position, and wherein the rotary drive shaft is configured to apply the rotary motions to the surgical end effector when in the second axial position. For example, in various embodiments, the first axial position may correspond to the rotary drive shaft being in a fully distal axial position in which a rotary drive head is mechanically engaged with a rotary drive nut as described, for example, in connection with
FIGS. 64-72 . In various embodiments, the second axial position may correspond to the rotary drive shaft being in a fully proximal axial position in which a rotary drive head is mechanically engaged with a shaft coupling portion of a shaft member as described, for example, in connection withFIGS. 64-72 . - In various embodiments, a surgical tool comprising an end effector, a first actuation mechanism, and a second actuation mechanism, may further comprise a head locking mechanism. For example, referring to
FIGS. 75-82 , a multi-axis articulating and rotatingsurgical tool 650 comprises anend effector 570, ashaft assembly 580, and ahead locking mechanism 590. Theend effector 570 comprises afirst jaw member 652A and asecond jaw member 652B. Thefirst jaw member 602A is movable relative to thesecond jaw member 602B between an open position (FIGS. 77 and 79 ) and a closed position (FIGS. 78 and 80 ) to clamp tissue between thefirst jaw member 652A and thesecond jaw member 652B. Thesurgical tool 650 is configured to independently articulate about an articulation joint in a vertical direction and a horizontal direction like thesurgical tool 600 shown inFIGS. 64-72 . Thesurgical tool 650 is also configured to independently rotate about a head rotation joint like thesurgical tool 600 shown inFIGS. 64-72 . Theend effector 570 comprises an I-beam member 670 and ajaw assembly 575 comprising thefirst jaw member 652A, thesecond jaw member 652B, aproximal portion 653 of thesecond jaw member 652B, and arotary drive nut 656 seated in theproximal portion 653. - The
end effector 570 is coupled to ashaft assembly 580 comprising an endeffector drive housing 658, an endeffector connector tube 660, an intermediatearticulation tube segment 666, and a surgical tool shaft member (not shown). Theend effector 570 and theshaft assembly 580 together comprise thesurgical tool 650. Theend effector 570 may be removably coupled to the endeffector drive housing 658 using a mechanism as described, for example, in connection withFIGS. 106-115 . The endeffector drive housing 608 is coupled to the endeffector connector tube 660 through the head rotation joint. Theend effector 570 and the endeffector drive housing 658 together comprise ahead portion 578 of thesurgical tool 650. Thehead portion 578 of thesurgical tool 650 is independently rotatable about the head rotation joint, as described in greater detail above in connectionFIGS. 64-72 showing thesurgical tool 600. - The end
effector connector tube 660 is coupled to the intermediatearticulation tube segment 666 through a ball-and-socket joint formed by the mutual engagement of the ball member of the endeffector connector tube 660 and the ball socket of the intermediatearticulation tube segment 666. The intermediatearticulation tube segment 666 is coupled to a surgical tool shaft member through a ball-and-socket joint formed by the mutual engagement of the ball member of the intermediatearticulation tube segment 616 and a ball socket of the surgical tool shaft member. The articulation joint comprises the endeffector connector tube 660, the intermediatearticulation tube segment 666, and the surgical tool shaft member. The independent vertical articulation and/or horizontal articulation of thesurgical tool 650 about the articulation joint may be actuated, for example, using independently actuatable drive cables connected to the ball member of the endeffector connector tube 660. This independent articulation functionality is described, for example, in connection withFIGS. 24-25 . Robotic and hand-held apparatuses for allowing a clinician to initiate articulation functionality are described, for example, in connection withFIGS. 6 , 16-21 and 46-50. - The movement of the
first jaw member 652A relative to thesecond jaw member 652B is actuated using the same actuation mechanism described above in connection withFIGS. 73 and 74 . Distal and proximal translation of the I-beam member 670 between a proximally retracted position (FIGS. 77 and 79 ), an intermediate position (seeFIG. 74 ), and a distally advanced position (FIGS. 78 and 80 ) may be accomplished with a suitable translation actuation mechanism. Referring toFIGS. 75-80 , the I-beam member 670 is connected to a threadedrotary drive member 654. A threadedrotary drive nut 656 is threaded onto the threadedrotary drive member 654. The threadedrotary drive nut 656 is seated in theproximal portion 653 of thesecond jaw member 652B. The threadedrotary drive nut 656 is mechanically constrained from translation in any direction, but is rotatable within theproximal portion 653 of thesecond jaw member 652B. Therefore, given the threaded engagement of therotary drive nut 656 and the threadedrotary drive member 654, rotational motion of therotary drive nut 656 is transformed into translational motion of the threadedrotary drive member 654 in the longitudinal direction and, in turn, into translational motion of the I-beam member 670 in the longitudinal direction. - The threaded
rotary drive member 654 is threaded through therotary drive nut 656 and is located inside a lumen of arotary drive shaft 680. The threadedrotary drive member 654 is not attached or connected to therotary drive shaft 680. The threadedrotary drive member 654 is freely movable within the lumen of therotary drive shaft 680 and will translate within the lumen of therotary drive shaft 680 when driven by rotation of therotary drive nut 656. Therotary drive shaft 680 comprising the threadedrotary drive member 654 located within the lumen of therotary drive shaft 680 forms a concentric rotary drive shaft/screw assembly that is located in the lumen of theshaft assembly 580. - Referring to
FIGS. 77-80 , the concentric rotary drive shaft/screw assembly is located within the lumen of theshaft assembly 560 and passes through the endeffector drive housing 658, the endeffector connector tube 660, and the intermediatearticulation tube segment 666. Although not shown inFIGS. 77-80 , at least therotary drive shaft 680 passes through a lumen of the surgical tool shaft member and is operably coupled to a driving mechanism that provides rotary motion and axial translational motion to therotary drive shaft 680. For example, in some embodiments, thesurgical tool 650 may be operably coupled through theshaft assembly 580 to a robotic surgical system that provides rotary motion and axial translational motion to therotary drive shaft 680, such as, for example, the robotic surgical systems described in connection with FIGS. 5 and 16-21. In some embodiments, for example, thesurgical tool 650 may be operably coupled through theshaft assembly 580 to a hand-held surgical device that provides rotary motion and axial translational motion to therotary drive shaft 680, such as, for example, the hand-held surgical devices described in connection withFIGS. 46-63 . In some embodiments, the threadedrotary drive member 654 has a length that is less than the length of therotary drive shaft 680 and, therefore, lies within only a distal portion of therotary drive shaft 680. - The threaded
rotary drive member 654 and therotary drive shaft 680 are flexible so that the portions of the threadedrotary drive member 654 and therotary drive shaft 680 that are located in the articulation joint can bend without damage or loss of operability during independent articulation of thesurgical tool 650 about the articulation joint. Example configurations of therotary drive shaft 680 are provided herein with reference toFIGS. 28-45 . - The
rotary drive shaft 680 comprises arotary drive head 682. Therotary drive head 682 comprises a femalehex coupling portion 684 on the distal side of therotary drive head 682, and therotary drive head 682 comprises a malehex coupling portion 686 on the proximal side of therotary drive head 682. The distal femalehex coupling portion 684 of therotary drive head 682 is configured to mechanically engage with a malehex coupling portion 657 of therotary drive nut 656 located on the proximal side of therotary drive nut 656. The proximal malehex coupling portion 686 of therotary drive head 682 is configured to mechanically engage with a female hexshaft coupling portion 659 of the endeffector drive housing 658. - Referring to
FIGS. 77 and 78 , therotary drive shaft 680 is shown in a fully distal axial position in which the femalehex coupling portion 684 of therotary drive head 682 is mechanically engaged with the malehex coupling portion 657 of therotary drive nut 656. In this configuration, rotation of therotary drive shaft 680 actuates rotation of therotary drive nut 656, which actuates translation of the threadedrotary drive member 654, which actuates translation of the I-beam member 670. Referring toFIGS. 79 and 80 , therotary drive shaft 680 is shown in a fully proximal axial position in which the malehex coupling portion 686 of therotary drive head 682 is mechanically engaged with the female hexshaft coupling portion 659 of the endeffector drive housing 658. In this configuration, rotation of therotary drive shaft 680 actuates rotation of thehead portion 578 of thesurgical tool 650 about rotation joint, including rotation of theend effector 570 and the endeffector drive housing 658. - The
rotary drive shaft 680 also comprises aspline lock 690. Thespline lock 690 is coupled to therotary drive shaft 680 usingshaft flanges 685. Thespline lock 690 is mechanically constrained from translation in any direction by therotary drive shaft 680 and theshaft flanges 685, but thespline lock 690 is freely rotatable about therotary drive shaft 680. Thespline lock 690 comprisesspline members 692 disposed circumferentially around the external surface of thespline lock 690 and oriented co-axially with theshaft assembly 580. As shown inFIGS. 75 and 76 , thespline lock 690 is located at the rotational joint formed by the coupling of the endeffector drive housing 658 and the endeffector connector tube 660. The endeffector drive housing 658 comprises aspline coupling portion 694 comprisingspline members 696 disposed circumferentially around the internal surface of the endeffector drive housing 658 and oriented co-axially with theshaft assembly 580. The endeffector connector tube 660 comprises aspline coupling portion 662 comprisingspline members 664 disposed circumferentially around the internal surface of the endeffector connector tube 660 and oriented co-axially with theshaft assembly 580. - The
spline members spline lock 690, the endeffector drive housing 658, and the endeffector connector tube 660, respectively, are configured to mechanically engage with each other when therotary drive shaft 680 is in a fully distal axial position in which the femalehex coupling portion 684 of therotary drive head 682 is mechanically engaged with the malehex coupling portion 657 of therotary drive nut 656 to drive rotation of therotary drive nut 656 and translation of the threadedrotary drive member 654 and the I-beam member 670 (FIGS. 77 , 78, and 82). The mechanical engagement of therespective spline members effector drive housing 658 into position with the endeffector connector tube 660, thereby locking the rotational joint and preventing rotation of thehead portion 578 of thesurgical tool 650. Because thespline lock 690 is freely rotatable about therotary drive shaft 680, the mechanical engagement of therespective spline members rotary drive shaft 680 from actuating therotary drive nut 656, the threadedrotary drive member 654, and the I-beam member 670. - When the
rotary drive shaft 680 is in a fully proximal axial position in which the malehex coupling portion 686 of therotary drive head 682 is mechanically engaged with the female hexshaft coupling portion 659 of the endeffector drive housing 658 to drive rotation of thehead portion 578 of thesurgical tool 650, thespline lock 690 is completely retracted into the lumen of the endeffector connector tube 660 and thespline lock 690 is completely disengaged from thespline coupling portion 694 of the endeffector drive housing 658. (FIGS. 79 , 80, and 81). In this configuration, thespline members 692 of thespline lock 690 and thespline members 664 of the endeffector connector tube 660 are completely engaged, and thespline members 692 of thespline lock 690 and thespline members 696 of the endeffector drive housing 658 are completely disengaged. The mechanical disengagement of thespline members 692 of thespline lock 690 and thespline members 696 of the endeffector drive housing 658 when therotary drive shaft 680 is in a fully proximal axial position unlocks the endeffector drive housing 658 from the endeffector connector tube 660, thereby unlocking the rotational joint and permitting rotation of thehead portion 578 of thesurgical tool 650. Because thespline lock 690 is freely rotatable about therotary drive shaft 680, the mechanical engagement ofspline members 692 of thespline lock 690 and thespline members 664 of the endeffector connector tube 660 does not prevent therotary drive shaft 680 from actuating the rotation of thehead portion 578 of thesurgical tool 650. - The
head locking mechanism 590 ensures that thehead portion 578 of thesurgical tool 650 does not rotate when therotary drive shaft 680 is in a fully distal axial position engaging therotary drive nut 656 to drive actuation of the jaw closure mechanism and/or the I-beam translation mechanism as described above (FIGS. 77 , 78, and 82). Thehead locking mechanism 590 ensures that thehead portion 578 of thesurgical tool 650 is freely rotatable when therotary drive shaft 680 is in a fully proximal axial position engaging theshaft coupling portion 659 of the endeffector drive housing 658 to drive actuation of head rotation as described above (FIGS. 79 , 80, and 81). - Referring to
FIGS. 77 and 78 , for example, rotation of therotary drive shaft 680 actuates rotation of therotary drive nut 656, which actuates distal or proximal translation of the threaded rotary drive member 654 (depending on the direction of rotary motion of the rotary drive shaft 680), which actuates distal or proximal translation of the I-beam member 670, which actuates the closing and opening of thejaw assembly 575, and distal and proximal transection strokes of the I-beam member 670/cuttingmember 675. Simultaneously, thespline lock 690 engages both the endeffector drive housing 658 and the endeffector connector tube 660 to prevent unintended head rotation. - Referring to
FIGS. 79 and 80 , for example, rotation of therotary drive shaft 680 actuates rotation of the endeffector drive housing 658, which actuates rotation of theend effector 570. Simultaneously, thespline lock 690 is disengaged both the endeffector drive housing 658 and does not prevent head rotation. Thus, therotary drive shaft 680 may be used to independently actuate the opening and closing of thejaw assembly 575, the proximal-distal transection stroke of the I-beam 670/cuttingmember 675, and the rotation of thehead portion 578 of thesurgical tool 650. - In various embodiments, an end effector, such as the
end effectors FIGS. 64-82 , may comprise first and second jaw members comprising a first and second distal textured portions, respectively. The first and second distal textured portions of the first and second jaw members of an end effector may be opposed and may allow the end effector to grip, pass, and/or manipulate surgical implements such as needles for suturing tissue, in addition to gripping tissue, for example, during dissection operations. In some embodiments, the distal textured portions may also be electrodes configured, for example, to deliver RF energy to tissue during dissection operations. This gripping, passing, manipulating, and/or dissecting functionality is described, for example, in connection withFIGS. 153-168 . - In various embodiments, an end effector, such as the
end effectors FIGS. 64-82 , may comprise first and second jaw members comprising first and second gripping portions disposed on outwardly facing surfaces of the first and second jaw members. The first and second gripping portions of the first and second jaw members of an end effector may function to aid in tissue dissection as described, for example, in connection withFIGS. 116-131 . - In various embodiments, an end effector, such as the
end effectors FIGS. 64-82 , may comprise at least one electrode disposed on at least one tissue-contacting surface of at least one jaw member. The electrodes may be configured, for example, to deliver RF energy to tissue clamped between the jaw members when in a closed position to weld/fuse the tissue, which in some embodiments, may also be transected by translating an I-beam member comprising a cutting member. In some embodiments, a second jaw member may also comprises an offset electrode located at the distal tip of the jaw member, the electrode configured to deliver RF energy to tissue during dissection operations, for example. This electrode functionality is described, for example, in connection with 153-168. - In various embodiments, an end effector, such as the
end effectors FIGS. 64-82 , may comprise jaw members comprising angled tissue-contacting surfaces as described, for example, in connection withFIGS. 132-142 . - Referring to
FIGS. 83-91 , a multi-axis articulating and rotatingsurgical tool 1200 comprises anend effector 1202 including ajaw assembly 1211 comprising afirst jaw member 1204 and asecond jaw member 1206. Thefirst jaw member 1204 is movable relative to thesecond jaw member 1206 between an open position and a closed position to clamp tissue between thefirst jaw member 1204 and thesecond jaw member 1206. Thesurgical tool 1200 is configured to independently articulate about an articulation joint 1208. As described above, thesurgical tool 1200 is also configured to independently rotate about a head rotation joint 1210. Referring primarily toFIG. 83 , theend effector 1202 further comprises aproximal shaft portion 1212. - The
end effector 1202 is coupled to ashaft assembly 1214 comprising an endeffector drive housing 1216, an endeffector connector tube 1218, an intermediatearticulation tube segment 1220, and a distal outer tube portion (not shown inFIGS. 83-91 ). Theend effector 1202 and theshaft assembly 1214 together can comprise thesurgical tool 1200. Theend effector 1202 may be removably coupled to the endeffector drive housing 1216 using a mechanism as described, for example, in connection withFIGS. 106-115 . The endeffector connector tube 1218 comprises a cylindrical portion 1222 and aball portion 1224. The endeffector drive housing 1216 is coupled to the cylindrical portion 1222 of the endeffector connector tube 1218 through the head rotation joint 1210. Theend effector 1202 and the endeffector drive housing 1216 together comprise a head portion of thesurgical tool 1200. The head portion of thesurgical tool 1200 is independently rotatable about the head rotation joint 1210. - Referring primarily to
FIGS. 85-87 , thesurgical tool 1200 may include aclosure mechanism 1226 for moving thefirst jaw member 1204 relative to thesecond jaw member 1206 between an open position (FIG. 86 ) and a closed position (FIG. 87 ). As illustrated, inFIG. 83 , thefirst jaw member 1204 may include first mountingholes 1228, and thesecond jaw member 1206 may include second mounting holes (not shown inFIGS. 83-91 ). Thefirst jaw member 1204 can be arranged relative to thesecond jaw member 1206 such that a pivot or trunnion pin (not shown inFIGS. 83-91 ) extends through the first mountingholes 1228 of thefirst jaw member 1204 and the second mounting holes of thesecond jaw member 1206 to pivotally couple thefirst jaw member 1204 to thesecond jaw member 1206. Other suitable means for coupling thefirst jaw member 1204 and thesecond jaw member 1206 are within the scope of this disclosure. - Referring to
FIGS. 83-91 , theclosure mechanism 1226 may comprise a linkage arrangement which may comprise afirst link 1230 and a second link (not shown inFIGS. 83-91 ). Theclosure mechanism 1226 may also comprise a closure driver in the form of aclosure nut 1232 for example. The closure nut 1232 (FIG. 84 ) may be at least partially positioned within the endeffector drive housing 1216. In use, theclosure nut 1232 may translate axially between a first position (FIG. 86 ) and a second position (FIG. 87 ) relative to the endeffector drive housing 1216 and may include afirst arm 1234 and asecond arm 1236. Referring primarily toFIG. 84 , thefirst arm 1234 and thesecond arm 1236 may extend distally from adistal portion 1238 of theclosure nut 1232, wherein thefirst arm 1234 may comprise afirst opening 1240 and thefirst arm 1234 may be pivotally connected to thefirst link 1230 by afirst pin 1242 through thefirst opening 1240. Similarly, thesecond arm 1236 may comprise asecond opening 1244, wherein thesecond arm 1236 may be pivotally connected to the second link by a second pin (not shown inFIGS. 83-91 ) through thesecond opening 1244. Thefirst link 1230 and the second link (not shown inFIGS. 83-91 ) are also pivotally connected to thefirst jaw member 1204 such that when theclosure nut 1232 is advanced distally from the first position (FIG. 86 ) to the second position (FIG. 87 ), thefirst jaw member 1204 is pivoted relative to thesecond jaw member 1206 towards a closed position. Correspondingly, when theclosure nut 1232 is refracted proximally from the second position (FIG. 89 ) to the first position (FIG. 91 ), thefirst jaw member 1204 is pivoted relative to thesecond jaw member 1206 towards the open position.FIG. 85 illustrates theclosure nut 1232 in a first position and thejaw assembly 1211 in an open position.FIG. 87 shows theclosure nut 1232 in a second position and thejaw assembly 1211 in a closed position. Theclosure nut 1232, however, may be constrained from rotation relative to the endeffector drive housing 1316 by an indexing feature, for example, abutting against the end effector drive housing 11316. - Referring to
FIGS. 83-91 , thesurgical tool 1200 may include afiring mechanism 1246 having a suitable firing driver. Thefiring mechanism 1246 may include an I-beam member 1247, a threadeddrive member 1248, and a threadedrotary drive nut 1250. The I-beam member 1247 may comprise a first I-beam flange 1252 and a second I-beam flange 1254. The I-beam member 1247 may operate in a manner similar to that described above with respect to the axiallymovable member 3016 described herein above. For example, the first I-beam flange 1252 and the second I-beam flange 1254 are connected with anintermediate portion 1256. Theintermediate portion 1256 of the I-beam member 1247 may comprise a cuttingmember 1258 on a distal or a leading end thereof. The I-beam member 1247 is configured to translate within afirst channel 1260 in thefirst jaw member 1204 and within asecond channel 1262 in thesecond jaw member 1206.FIG. 84 shows the I-beam member 1247 in a fully proximal position and thejaw assembly 1211 in an open position. The I-beam member 1247 may be translated distally in order for the cuttingmember 1258 to transect tissue clamped between thefirst jaw member 1204 and thesecond jaw member 1206 when in the closed position. The cuttingmember 1258, which may comprise a sharp edge or blade for example, is configured to cut through clamped tissue during a distal translation (firing) stroke of the I-beam member 1247, thereby transecting the tissue.FIG. 88 shows the I-beam member 1247 in a fully distal position after a firing stroke. - Before, during, and/or after the I-
beam member 1247 is advanced through tissue clamped between thefirst jaw member 1204 and thesecond jaw member 1206, electrical current can be supplied to electrodes located in thefirst jaw member 1204 and/orsecond jaw member 1206 in order to weld/fuse the tissue, as described in greater detail in this specification. For example, electrodes may be configured to deliver RF energy to tissue clamped between thefirst jaw member 1204 and thesecond jaw member 1206 when in a closed position to weld/fuse the tissue. - Distal and proximal translation of the I-
beam member 1247 between a proximally retracted position and a distally advanced position may be accomplished with asuitable firing mechanism 1246. Referring toFIGS. 83-91 , the I-beam member 1247 is connected to the threadeddrive member 1248, wherein the threadedrotary drive nut 1250 is in a threaded engagement with the threadeddrive member 1248. Referring primarily toFIG. 83 , the threadedrotary drive nut 1250 is positioned within in the endeffector drive housing 1216 proximal to theclosure nut 1232 between a proximalannular flange 1264 and a distalannular flange 1266. The threadedrotary drive nut 1250 is mechanically constrained from translation in any direction, but is rotatable within the endeffector drive housing 1216 around a central axis A. Therefore, given the threaded engagement of therotary drive nut 1250 and the threadeddrive member 1248, rotational motion of therotary drive nut 1250 is transformed into translational motion of the threadeddrive member 1248 along the central axis A and, in turn, into translational motion of the I-beam member 1247 along the central axis A. - The threaded
drive member 1248 is threaded through therotary drive nut 1250 and is located at least partially inside alumen 1268 of arotary drive shaft 1270. The threadeddrive member 1248 is not attached or connected to therotary drive shaft 1270. In use, the threadeddrive member 1248 is freely movable within the lumen of therotary drive shaft 1270 and will translate within the lumen of therotary drive shaft 1270 when driven by rotation of therotary drive nut 1250. Therotary drive shaft 1270 and the threadeddrive member 1248 form a concentric rotary drive shaft/screw assembly that is located in theshaft assembly 1214. In addition, the threadeddrive member 1248 extends distally through alumen 1272 of theclosure nut 1232. Similar to the above, the threadeddrive member 1248 is freely movable within thelumen 1272 of theclosure nut 1232, and, as a result, the threadeddrive member 1248 will translate within thelumen 1272 of theclosure nut 1232 when driven by rotation of therotary drive nut 1250. - Referring to
FIGS. 83-91 , therotary drive nut 1250 may comprise a threadeddistal portion 1274. Theclosure nut 1232 may comprise a threadedproximal portion 1276. The threadeddistal portion 1274 of therotary drive nut 1250 and the threadedproximal portion 1276 of theclosure nut 1232 are in a threaded engagement. As described above, the threadedrotary drive nut 1250 is mechanically constrained from translation in any direction, but is rotatable within the endeffector drive housing 1216 around a central axis A. Therefore, given the threaded engagement of therotary drive nut 1250 and theclosure nut 1232, the rotational motion of therotary drive nut 1250 is transformed into translational motion of theclosure nut 1232 along the central axis A and, in turn, into pivotal motion in thejaw assembly 1211. - As shown in
FIG. 83 , the endeffector drive housing 1216, the endeffector connector tube 1218, and the intermediatearticulation tube segment 1220, which together comprise theshaft assembly 1214, have open lumens and, therefore, theshaft assembly 1214 comprises a lumen extending longitudinally therethrough, as shown in FIGS. 83 and 85-91. Referring again to FIGS. 83 and 85-91, the concentric rotary drive shaft/threaded drive member assembly is located within the lumen of theshaft assembly 1214 and passes through the endeffector drive housing 1216, the endeffector connector tube 1218, and the intermediatearticulation tube segment 1220. Although not shown inFIGS. 83-91 , at least therotary drive shaft 1270 passes through a lumen of theshaft assembly 1214 and is operably coupled to a driving mechanism that provides rotational motion and axial translational motion to therotary drive shaft 1270. For example, in some embodiments, thesurgical tool 1200 may be operably coupled through theshaft assembly 1214 to a robotic surgical system that provides rotational motion and axial translational motion to therotary drive shaft 1270, such as, for example, the robotic surgical systems described in connection with FIGS. 5 and 16-21. For example, therotary drive shaft 1270 may be coupled, through the shaft assembly, to the proximaldrive shaft segment 380 described herein above. In some embodiments, for example, thesurgical tool 1200 may be operably coupled through theshaft assembly 1214 to a hand-held surgical device, such as the device described herein above with respect toFIGS. 46-63 . For example, therotary drive shaft 1270 may be operably coupled, though theshaft assembly 560, to the proximaldrive shaft segment 380′ described herein above. - In some embodiments, the threaded
drive member 1248 has a length that is less than the length of therotary drive shaft 1270 and, therefore, lies within only a distal portion of therotary drive shaft 1270, for example. The threadeddrive member 1248 and therotary drive shaft 1270 may be flexible so that the threadeddrive member 1248 and therotary drive shaft 1270 can bend without damage or loss of operability during articulation of thesurgical tool 1200 about the articulation joint 1208. - Described in greater detail elsewhere in the specification, the
rotary drive shaft 1270 may comprise arotary drive head 1278. Therotary drive head 1278 comprises a femalehex coupling portion 1280 on the distal side of therotary drive head 1278 and therotary drive head 1278 comprises a malehex coupling portion 1282 on the proximal side of therotary drive head 1278. The distal femalehex coupling portion 1280 of therotary drive head 1278 is configured to mechanically engage with a malehex coupling portion 1284 of therotary drive nut 1250 located on the proximal side of therotary drive nut 1250. As described elsewhere, the proximal malehex coupling portion 1282 of therotary drive head 1278 is configured to mechanically engage with a femalehex coupling portion 1286 of the endeffector drive housing 1216 in order to rotate theend effector 1202 around the central axis A. - Referring to
FIG. 85 , therotary drive shaft 1270 is shown in a fully proximal axial position in which thehex coupling portion 1282 of therotary drive head 1278 is mechanically engaged with the female hex shaft coupling portion of the endeffector drive housing 1216. In this configuration, rotation of therotary drive shaft 1270 causes rotation of the head portion of thesurgical tool 1200 about the head rotation joint 1210, including rotation of theend effector 1202 and the endeffector drive housing 1216. In this configuration, the portion of thesurgical tool 1200 that is distal to the head rotation joint 1210 (e.g., a head portion) rotates with rotation of therotary drive shaft 1270, and the portion of thesurgical tool 1200 that is proximal to the head rotation joint 1210 does not rotate with rotation of therotary drive shaft 1270. An example of a head rotation joint 1210 is described in connection withFIGS. 64-82 , 83-91 and 92-96. Other suitable techniques and rotation means for rotating theend effector 1202 relative to theshaft assembly 1214 are within the scope of the current disclosure. It will be appreciated that a desired rotation speed of therotary drive shaft 1270 to drive therotary drive nut 1250 may be greater than a desired rotational speed for rotating the head portion. For example, therotary drive shaft 1270 may be driven by a motor (not shown) that is operable at different rotary speeds. - The orientation of the threading of the threaded
drive member 1248 and therotary drive nut 1250 may be established so that either clockwise or counterclockwise rotation of therotary drive shaft 1270 will cause distal or proximal translation of the threadeddrive member 1248 and I-beam member 1247. Stated another way, therotary drive shaft 1270, and therotary drive nut 1250 can be rotated in a first direction to advance the threadeddrive member 1248 distally and correspondingly, rotated in a second opposite direction to retract the threadeddrive member 1248 proximally. The pitch and/or number of starts of the threading of the threadeddrive member 1248 and the threading of therotary drive nut 1250 may be selected to control the speed and/or duration of the rotation of therotary drive nut 1250 and, in turn, the translation of the threadeddrive member 1248. In this manner, the direction, speed, and/or duration of rotation of therotary drive shaft 1270 can be controlled in order to control the direction, speed, and magnitude of the longitudinal translation of the I-beam member 1247 along thefirst channel 1260 andsecond channel 1262, as described above. - Similar to the above, the orientation of the threading of the threaded
distal portion 1274 of therotary drive nut 1250 and the threading of the threadedproximal portion 1276 of theclosure nut 1232 may be established so that either clockwise or counterclockwise rotation of therotary drive shaft 1270 will cause distal or proximal translation of theclosure nut 1232 and in turn closure or opening of thejaw assembly 1211. Stated another way, threadeddistal portion 1274 can be rotated in a first direction to advance the threadedproximal portion 1276 distally and correspondingly, rotated in a second opposite direction to retract the threadedproximal portion 1276 proximally. The pitch and/or number of starts of the threading of the threadeddistal portion 1274 of the threadeddrive member 1248 and the threading of threadedproximal portion 1276 of theclosure nut 1232 may be selected to control speed and/or duration of the rotation of therotary drive nut 1250 and translation of theclosure nut 1232. In this manner, the direction, speed, and/or duration of rotation of therotary drive shaft 1270 can be controlled in order to control the direction, speed, and magnitude of the pivoting of the of thejaw assembly 1211. - Referring to
FIGS. 86-88 , therotary drive shaft 1270 is shown in a fully extended distal axial position in which the femalehex coupling portion 1280 of therotary drive head 1278 is mechanically engaged with the malehex coupling portion 1284 of therotary drive nut 1250. In this configuration, rotation of therotary drive shaft 1270 in a first direction (for example a clockwise direction) around the central axis A begins a firing stroke by causing rotation of therotary drive nut 1250 in the first direction. The rotation of the rotary drive nut advances the threadeddrive member 1248, which, in turn, advances the I-beam member 1247 distally. Simultaneously, the rotation of therotary drive nut 1250 advances theclosure nut 1232 distally, which closes thejaw assembly 1211. Theclosure nut 1232 and the threadeddrive member 1248 are advanced distally until theclosure nut 1232 is disengaged from threaded engagement with therotary drive nut 1250 as illustrated inFIG. 88 . Stated another way, theclosure nut 1232 can be advanced distally until the threads of the threadeddistal portion 1274 of therotary drive nut 1250 are no longer threadedly engaged with the threads of the threadedproximal portion 1276 of theclosure nut 1232. Thus, as a result, further rotation of therotary drive nut 1250 in the first direction will not advance theclosure nut 1232 distally. Theclosure nut 1232 will sit idle during the remainder of a firing stroke. Additional rotation of therotary drive nut 1250, in the same direction, continues the distal advancement of the threadeddrive member 1248, which continues the distal advancement of the I-beam member 1247 for the remainder of the firing stroke. - The
surgical tool 1200 may comprise a biasingmember 1288, a helical spring, and/or a washer spring for example, situated at least partially around the threadeddistal portion 1274 of therotary drive nut 1250. As illustrated inFIG. 86 , the biasingmember 1288 may include a proximal end abutted against the distalannular flange 1266 of the endeffector drive housing 1216, and a distal end abutted against aproximal end 1290 of theclosure nut 1232. Once theclosure nut 1232 is released from threaded engagement with therotary drive nut 1250, the biasingmember 1288 can keep theclosure nut 1232 from reengaging therotary drive nut 1250 by pushing theclosure nut 1232 axially in a distal direction along the central axis A until thedistal portion 1238 of theclosure nut 1232 abuts against aterminal wall 1294 of theproximal shaft portion 1212 of theend effector 1202. The biasingmember 1288 also ensures that thejaw assembly 1211 remains under positive closure pressure by biasing theclosure nut 1232 abutted against theterminal wall 1294 of theproximal shaft portion 1212 of theend effector 1202 as the I-beam member 1247 is being advanced distally through theclosed jaw assembly 1211. - Referring primarily to
FIG. 84 , theclosure nut 1232 may comprise acam member 1296 extending distally from theclosure nut 1232. Referring primarily toFIG. 87 , thecam member 1296 may extend through anopening 1298 of theterminal wall 1294 of theproximal shaft portion 1212 of theend effector 1202 when thedistal portion 1238 of theclosure nut 1232 is abutted against theterminal wall 1294 of theproximal shaft portion 1212 of theend effector 1202 under positive pressure from the biasingmember 1288. - Referring to
FIG. 88 , therotary drive shaft 1270 is shown in a fully extended distal axial position in which the femalehex coupling portion 1280 of therotary drive head 1278 is mechanically engaged with the makehex coupling portion 1284 of therotary drive nut 1250. In this configuration, rotation of therotary drive shaft 1270 in a second direction opposite the first direction (for example a counter clockwise direction) begins a reverse stroke by causing an opposite rotation of therotary drive nut 1250, which retracts the threadeddrive member 1248, which in turn retracts the I-beam member 1247. At least during the initial phase of the reverse stroke, theclosure nut 1232 remains disengaged from therotary drive nut 1250. However, when the I-beam member 1247 is being retracted, the I-beam member 1247 can engage thecam member 1296 of theclosure nut 1232. Any further retraction of the I-beam member 1247 can simultaneously open thejaw assembly 1211 by pushing theclosure nut 1232 axially in a proximal direction along the central axis A toward therotary drive nut 1250. In order for the I-beam member 1247 to push theclosure nut 1232 proximally, the I-beam member 1247 must compress the biasingmember 1288. As the I-beam member 1247 is refracted, the I-beam member 1247 can push theclosure nut 1232 proximally until the closure nut is returned into threaded engagement with therotary drive nut 1250. At such point, therotary drive nut 1250 can pull theclosure nut 1232 proximally owing to the threaded engagement therebetween. As theclosure nut 1232 is retracted proximally, thefirst link 1230, and the second link will cause thejaw assembly 1211 to open. The retraction of the I-beam member 1247 and the opening of thejaw assembly 1211 continue simultaneously during the remainder of the reverse stroke. - The sequence of events causing the closure of the
jaw assembly 1211, the full extension of the I-beam member 1247, the full refraction of the I-beam member 1247, and the reopening of thejaw assembly 1211 is illustrated inFIGS. 85-91 in a chronological order.FIG. 85 shows thejaw assembly 1211 in a fully open position, the I-beam member 1247 in a fully retracted position, and therotary drive shaft 1270 in a fully retracted axial position, wherein the femalehex coupling portion 1280 of therotary drive head 1278 is mechanically disengaged from the malehex coupling portion 1284 of therotary drive nut 1250. In a first phase of operation, returning toFIG. 86 , therotary drive shaft 1270 is advanced axially to mechanically engage the femalehex coupling portion 1280 of therotary drive head 1278 with the malehex coupling portion 1284 of therotary drive nut 1250. Referring again toFIG. 86 , the rotation of therotary drive shaft 1270 in a first direction (for example a clockwise direction) around the central axis A causes the rotation of therotary drive nut 1250 in the first direction. Theclosure nut 1232 and the threadeddrive member 1248 are simultaneously advanced distally by rotation of therotary drive nut 1250 in the first direction. In turn, the closure of thejaw assembly 1211 and the initial advancement of the I-beam member 1247 occur simultaneously during the first phase of operation. In a second phase of operation, referring now toFIG. 87 , theclosure nut 1232 is disengaged from threaded engagement with therotary drive nut 1250. During the remainder of the second phase of operation, therotary drive nut 1250 continues to advance the threadeddrive member 1248 independently of theclosure nut 1232. As a result, referring primarily toFIG. 88 , thejaw assembly 1211 remains closed and the I-beam member 1247 continues to advance until the end of the second phase of operation. - In a third phase of operation, as illustrated in
FIG. 89 , therotary drive shaft 1270 is rotated in a second direction opposite the first direction, which causes the rotation of therotary drive nut 1250 in the second direction. In the third phase of operation, theclosure nut 1232 remains disengaged fromrotary drive nut 1250. The rotation of therotary drive nut 1250 retracts the threadeddrive member 1248 independent of theclosure nut 1232. In result, thejaw assembly 1211 remains closed, and the I-beam member 1247 is retracted in response to the rotation of the rotary drive. In a fourth phase of operation, referring primarily toFIG. 90 , therotary drive nut 1250 continues its rotation in the second direction thereby retracting the threadeddrive member 1248 which retracts I-beam member 1247 until the I-beam member 1247 engages thecam member 1296 ofclosure nut 1232. Any further retraction of the I-beam member 1247 simultaneously opens thejaw assembly 1211 by pushing theclosure nut 1232 axially in a proximal direction along the central axis A towards therotary drive nut 1250 compressing the biasingmember 1288. Referring primarily toFIG. 91 , the I-beam member 1247 can continue to push theclosure nut 1232 proximally until it is returned into threaded engagement with therotary drive nut 1250. The retraction of the I-beam member 1247 and the opening of thejaw assembly 1211 continue simultaneously during the remainder of the fourth phase of operation. - Referring to
FIGS. 92-96 , a multi-axis articulating and rotatingsurgical tool 1300 comprises anend effector 1302 including ajaw assembly 1311 comprising afirst jaw member 1304 and asecond jaw member 1306. Thefirst jaw member 1304 is movable relative to thesecond jaw member 1306 between an open position and a closed position to clamp tissue between thefirst jaw member 1304 and thesecond jaw member 1306. Thesurgical tool 1300 is configured to independently articulate about an articulation joint 1308. As described above, thesurgical tool 1300 is also configured to independently rotate about a head rotation joint 1310. - The
end effector 1302 is coupled to ashaft assembly 1314 comprising an endeffector drive housing 1316, an endeffector connector tube 1318, an intermediate articulation tube segment 1320, and a distal outer tube portion (not shown inFIGS. 92-96 ). Theend effector 1302 and theshaft assembly 1314 together can comprise thesurgical tool 1300. Theend effector 1302 may be removably coupled to the endeffector drive housing 1316 using a mechanism as described, for example, in connection withFIGS. 106-115 . The endeffector connector tube 1318 comprises acylindrical portion 1322 and aball portion 1324. The endeffector drive housing 1316 is coupled to thecylindrical portion 1322 of the endeffector connector tube 1318 through the head rotation joint 1310. Theend effector 1302 and the endeffector drive housing 1316 together comprise a head portion of thesurgical tool 1300. The head portion of thesurgical tool 1300 is independently rotatable about the head rotation joint 1310. - Referring primarily to
FIG. 92 , thesurgical tool 1300 may include aclosure mechanism 1326 for moving thefirst jaw member 1304 relative to thesecond jaw member 1306 between an open position (FIG. 93 ) and a closed position (FIG. 94 ). As illustrated, inFIG. 83 , thefirst jaw member 1304 may include first mountingholes 1328, and thesecond jaw member 1306 may include second mounting holes (not shown inFIGS. 92-96 ). Thefirst jaw member 1304 can be arranged relative to thesecond jaw member 1306 such that a pivot or trunnion pin (not shown inFIGS. 92-96 ) extends through the first mountingholes 1328 of thefirst jaw member 1304 and the second mounting holes of thesecond jaw member 1306 to pivotally couple thefirst jaw member 1304 to thesecond jaw member 1306. Other suitable means for coupling thefirst jaw member 1304 and thesecond jaw member 1306 are within the scope of this disclosure. - Referring to
FIGS. 92-96 , the closure mechanism may comprise aclosure link 1330 which translates axially relative to the endeffector drive housing 1316 between a first position and a second position. Theclosure link 1330 may comprise adistal end 1332 and aproximal end 1334. Thedistal end 1332 may be pivotally connected to aproximal portion 1336 of thefirst jaw member 1304 such that when theclosure link 1330 is translated between the first position and the second position, thefirst jaw member 1304 is moved relative to thesecond jaw member 1306 between an open and a closed position. - Referring to
FIGS. 92-96 , theclosure mechanism 1328 may also comprise a closure driver in the form of abarrel cam 1338 for example. Thebarrel cam 1338 may be positioned within the endeffector drive housing 1316. Thebarrel cam 1338 may comprise a generally cylindrical shape having alumen 1340 therethrough. Thebarrel cam 1338 may include a firstarcuate groove 1346, and a secondarcuate groove 1348 defined in a peripheral surface thereof. The firstarcuate groove 1346 may receive a first pin 1350 extending from the endeffector drive housing 1316. The secondarcuate groove 1348 may receive a second pin (not shown inFIGS. 92-96 ) extending from the endeffector drive housing 1316. The first pin 1350 and the second pin (not shown inFIGS. 92-96 ) may extend from circumferentially opposite sides of an inner wall of the endeffector drive housing 1316. Thebarrel cam 1338 may rotate around central axis A, wherein, as thebarrel cam 1338 is rotated around central axis A, the first pin 1350 travels along the firstarcuate groove 1346, and the second pin travels along the secondarcuate groove 1348 thereby translating thebarrel cam 1338 axially along central axis A. The result is a conversion of the rotational motion of thebarrel cam 1338 into an axial motion of theclosure link 1330. Stated another way, the rotation of thebarrel cam 1338 in a first direction (for example a clockwise direction) around the central axis A may result in advancing thebarrel cam 1338 axially in a distal direction. Correspondingly, the rotation of thebarrel cam 1338 in a second direction (for example a counter clockwise direction) opposite the first direction may result in retracting thebarrel cam 1338 axially in a proximal direction along the central axis A. - Referring to
FIGS. 92-96 , theproximal end 1334 of theclosure link 1330 may be operatively engaged with thebarrel cam 1338 such that the axially advancement of thebarrel cam 1338 may cause theclosure link 1330 to be advanced axially, and, in turn close thejaw assembly 1311. Similarly, the proximal retraction of thebarrel cam 1338 may retract theclosure link 1330, which may open thejaw assembly 1311. As illustrated inFIGS. 92-96 , thebarrel cam 1338 may include acircumferential recess 1354 on the external wall of thebarrel cam 1338 at a distal portion thereof. The proximal end of theclosure link 1330 may comprise aconnector member 1356. Theconnector member 1356 may be operably engaged with thebarrel cam 1338 along therecess 1354. As a result, thebarrel cam 1338 may translate axial motions to theclosure link 1330 through theconnector member 1356. - Referring primarily to
FIG. 92 , thesurgical tool 1300 may include afiring mechanism 1358. Thefiring mechanism 1358 may include an I-beam member 1360, a threadeddrive member 1362, and a threadedrotary drive nut 1364. The I-beam member 1360 may operate in a manner similar to that of the axiallymovable member 3016 described herein above and may comprise a first I-beam flange 1367 and a second I-beam flange 1368. The first I-beam flange 1367 and the second I-beam flange 1368 are connected with an intermediate portion 1370. The intermediate portion 1370 of the I-beam member 1360 may comprise a cuttingmember 1372, which may comprise a sharp edge or blade for example, to transect tissue clamped between thefirst jaw member 1304 and thesecond jaw member 1306 when thejaw assembly 1311 is closed. The I-beam member 1360 may translate distally within a first channel (not shown inFIGS. 92-96 ) defined in thefirst jaw member 1304 and within asecond channel 1376 defined in thesecond jaw member 1306 to cut through clamped tissue during a distal translation (firing) stroke.FIG. 96 illustrates the I-beam member 1360 after a firing stroke. - Before, during, and/or after the I-
beam member 1360 is advanced through tissue clamped between thefirst jaw member 1304 and thesecond jaw member 1306, electrical current can be supplied toelectrodes 1378 located in thefirst jaw member 1304 and/orsecond jaw member 1306 in order to weld/fuse the tissue, as described in greater detail in this specification. For example,electrodes 1378 may be configured to deliver RF energy to tissue clamped between thefirst jaw member 1304 and thesecond jaw member 1306 when in a closed position to weld/fuse the tissue. - Distal and proximal translation of the I-
beam member 1360 between a proximally retracted position and a distally advanced position may be accomplished with asuitable firing mechanism 1358. Referring toFIGS. 92-96 , the I-beam member 1360 is connected to the threadeddrive member 1362, wherein the threadeddrive member 1362 is threadedly engaged with therotary drive nut 1364. The threadedrotary drive nut 1364 is positioned within the endeffector drive housing 1316 distal to thebarrel cam 1338 between a proximalannular flange 1339A and a distalannular flange 1339B. The threadedrotary drive nut 1364 is mechanically constrained from translation in any direction, but is rotatable within the endeffector drive housing 1316. Therefore, given the threaded engagement of therotary drive nut 1364 and the threadeddrive member 1362, rotational motion of therotary drive nut 1364 is transformed into translational motion of the threadeddrive member 1362 along the central axis A and, in turn, into translational motion of the I-beam member 1360 along the central axis A. - The threaded
drive member 1362 is threaded through therotary drive nut 1364 and is located at least partially inside alumen 1381 of arotary drive shaft 1382. The threadeddrive member 1362 is not attached or connected to therotary drive shaft 1382. The threadeddrive member 1362 is freely movable within thelumen 1381 of therotary drive shaft 1382 and will translate within thelumen 1381 of therotary drive shaft 1382 when driven by rotation of therotary drive nut 1364. Therotary drive shaft 1382 and the threadeddrive member 1362 form a concentric rotary drive shaft/threaded drive member assembly that is located in theshaft assembly 1314. In addition, the threadeddrive member 1362 extends distally through alumen 1384 of thebarrel cam 1338 wherein the threadeddrive member 1362 is freely movable within thelumen 1384 of thebarrel cam 1338 and will translate within thelumen 1384 of thebarrel cam 1338 when the threaded drive member is driven by rotation of therotary drive nut 1364. - As shown in
FIG. 92 , the endeffector drive housing 1316, the endeffector connector tube 1318, and the intermediate articulation tube segment 1320, which together comprise theshaft assembly 1314, have lumens extending therethrough. As a result, theshaft assembly 1314 can comprise a lumen extending therethrough, as illustrated inFIGS. 92-96 . Referring again toFIGS. 92-96 , the concentric rotary drive shaft/threaded drive member assembly is located within the lumen of theshaft assembly 1314 and passes through the endeffector drive housing 1316, the endeffector connector tube 1318, and the intermediate articulation tube segment 1320. Although not shown inFIGS. 92-96 , at least therotary drive shaft 1382 passes through a lumen of theshaft assembly 1314 and is operably coupled to a driving mechanism that provides rotational and/or axial translational motion to therotary drive shaft 1382. For example, in some embodiments, thesurgical tool 1300 may be operably coupled through theshaft assembly 1314 to a robotic surgical system that provides rotational motion and/or axial translational motion to therotary drive shaft 1382, such as, for example, the robotic surgical systems described in connection with FIGS. 5 and 16-21. For example, therotary drive shaft 1382 may be operably coupled, though theshaft assembly 1314, to the proximaldrive shaft segment 380 described herein above. Also, in some embodiments, thesurgical tool 1300 may be utilized in conjunction with a hand-held surgical device, such as the device described herein above with respect toFIGS. 46-63 . For example, therotary drive shaft 1382 may be operably coupled, through theshaft assembly 1314, to the proximaldrive shaft segment 380′ described herein above. - In some embodiments, the threaded
drive member 1362 has a length that is less than the length of therotary drive shaft 1382 and, therefore, lies within only a distal portion of therotary drive shaft 1382, for example. The threadeddrive member 1362 and therotary drive shaft 1382 may be flexible so that the threadeddrive member 1362 and therotary drive shaft 1382 can bend without damage or loss of operability during articulation of thesurgical tool 1300 about the articulation joint 1308. - The
rotary drive shaft 1382 may comprise arotary drive head 1386. Therotary drive head 1386 may comprisespline members 1388 disposed circumferentially around an external surface of therotary drive head 1386 and oriented co-axially with theshaft assembly 1314. The endeffector drive housing 1316 may comprise aspline coupling portion 1390 comprisingspline members 1392 disposed circumferentially around an internal wall of the endeffector drive housing 1316 and oriented co-axially with theshaft assembly 1314. Thebarrel cam 1338 may comprise aspline coupling portion 1394 comprisingspline members 1396 disposed circumferentially around an internal wall ofbarrel cam 1338 and oriented co-axially with theshaft assembly 1314. Therotary drive nut 1364 may also comprise aspline coupling portion 1397 comprisingspline members 1398 disposed circumferentially around an internal wall ofrotary drive nut 1364 and oriented co-axially with theshaft assembly 1314. As illustrated inFIG. 93 , therotary drive shaft 1382 may be selectively retracted proximally to bring therotary drive head 1386 into operable engagement with thespline coupling portion 1390 of the endeffector drive housing 1316. In this configuration, rotation of therotary drive shaft 1382 causes rotation of the head portion of thesurgical tool 1300 about the head rotation joint 1310, including rotation of theend effector 1302 and the endeffector drive housing 1316. In this configuration, the portion of thesurgical tool 1300 that is distal to the head rotation joint 1310 rotates with rotation of therotary drive shaft 1382, and the portion of thesurgical tool 1300 that is proximal to the head rotation joint 1310 does not rotate with rotation of therotary drive shaft 1382. An example of a head rotation joint 1310 is described in connection withFIGS. 64-82 , 83-91 and 92-96. Other suitable techniques and rotation means for rotating theend effector 1302 relative to theshaft assembly 1314 are within the scope of the current disclosure. It will be appreciated that a desired rotation speed of therotary drive shaft 1382 to drive therotary drive nut 1364 may be greater than a desired rotational speed for rotating the head portion. For example, therotary drive shaft 1270 may be driven by a motor (not shown) that is operable at different rotary speeds. - As illustrated in
FIG. 94 , therotary drive shaft 1382 may be selectively advanced distally to bring therotary drive head 1386 into operable engagement with thespline coupling portion 1394 of thebarrel cam 1338. In this configuration, rotation of therotary drive shaft 1382 causes rotation of thebarrel cam 1338. As described above, the rotation of thebarrel cam 1338 causes axial motions in theclosure link 1330. In result, the rotation of therotary drive shaft 1382 in a first direction (for example a clockwise direction) around the central axis A may cause theclosure link 1330 to be advanced distally along the central axis A, which may close thejaw assembly 1311. Alternatively, the rotation of therotary drive shaft 1382 in a second direction (for example a clockwise direction) opposite the first direction may cause theclosure link 1330 to be retracted proximally along the central axis A, which in turn may open thejaw assembly 1311. - As illustrated ire
FIG. 95 , therotary drive shaft 1382 may be selectively advanced distally to pass therotary drive head 1386 through the lumen of thebarrel cam 1338 into aspace 1399 in the endeffector drive housing 1316 between thebarrel cam 1338 and therotary drive nut 1364 wherein therotary drive head 1386 is not in operable engagement with any of the spline coupling portions. Therotary drive shaft 1382 may then be further advanced distally to bringrotary drive head 1386 into operable engagement with thespline coupling portion 1397 of therotary drive nut 1364 as illustrated inFIG. 96 . In this configuration, rotation of therotary drive shaft 1382 causes rotation of therotary drive nut 1364. As described above, the rotation of therotary drive nut 1364 causes axial motions in the threadeddrive member 1362. In result, rotation of therotary drive shaft 1382 in a first direction (for example a clockwise direction) around the central axis A, may cause the threadeddrive member 1362 to be advanced distally, which in turn may advance the I-beam member 1360 distally. Alternatively, rotation of therotary drive shaft 1382 in a second direction (for example a clockwise direction) opposite the first direction may cause the threadeddrive member 1362 to be retracted proximally, which may retract the I-beam member 1360 proximally. - The sequence of events causing the closure of the
jaw assembly 1311, the full extension of the I-beam member 1360, the full refraction of the I-beam member 1360, and the reopening of thejaw assembly 1311 is illustrated inFIGS. 93-96 in a chronological order.FIG. 93 shows thejaw assembly 1311 in a fully open position, the I-beam member 1360 in a fully retracted position, and therotary drive shaft 1382 in a retracted axial position, wherein therotary drive head 1386 is operably engaged with thespline coupling portion 1390 of the endeffector drive housing 1316. In a first phase of operation, therotary drive shaft 1382 is rotated to rotate theend effector 1302 into an appropriate orientation, for example relative to a blood vessel. In a second phase of operation, therotary drive shaft 1382 is advanced axially to bring therotary drive head 1386 into operable engagement with thespline coupling portion 1394 of thebarrel cam 1338. In this configuration, therotary drive shaft 1382 may be rotated in a first direction (for example a clockwise direction) around the central axis A to close thejaw assembly 1311 around the blood vessel. Theelectrodes 1378 in thefirst jaw member 1304 and thesecond jaw member 1306 may be activated to seal the blood vessel. In a third phase of operation, therotary drive shaft 1382 may then be advanced axially to bring therotary drive head 1386 into operable engagement with thespline coupling portion 1397 of therotary drive nut 1364. In this configuration, therotary drive shaft 1382 may be rotated in a first direction around the central axis A (for example a clockwise direction) to advance the I-beam member 1360 thereby transecting the sealed blood vessel. In a fourth phase of operation, therotary drive shaft 1382 may be rotated in a second direction (for example a counter clockwise direction) opposite the first direction to retract the I-beam member 1360. - In a fifth phase of operation, the
rotary drive shaft 1382 is retracted axially to bring therotary drive head 1386 into operable engagement with thespline coupling portion 1394 of thebarrel cam 1338. In this configuration, therotary drive shaft 1382 may be rotated in a second direction (for example a counter clockwise direction) opposite the first direction to reopen thejaw assembly 1311 thereby releasing the sealed cut blood vessel. - As described above, a surgical tool can utilize a drive system for translating a drive member distally within an end effector of the surgical tool, to advance a cutting member within the end effector, for example, and for translating the drive tube proximally to retract the drive tube and/or cutting member.
FIGS. 97 and 98 illustrate an exampledrive shaft assembly 1400 that may be employed in connection with anend effector 1420 and/or any of the end effectors described herein. For example, the drive shaft assembly 1400 (as well as theassembly 1400′) may correspond to various threaded rotary drive members described herein including, for example, the threadedrotary drive members drive shaft assembly 1400 can be advanced distally in order to rotate ajaw member 1422 of theend effector 1420 between a closed position and an open position, as illustrated inFIG. 97 , and advance a cutting member between thejaw member 1422 and ajaw member 1424 positioned opposite thejaw member 1422. In one example form, thedrive shaft assembly 1400 includes a drive member, or tube, 1402 that can comprise a series of annularjoint segments 1404 cut therein. - In various example embodiments, the
drive member 1402 can comprise a hollow metal tube comprised of stainless steel, titanium, and/or any other suitable material, for example, that has a series of annularjoint segments 1404 formed therein. In at least one embodiment, the annularjoint segments 1404 can comprise a plurality of loosely interlockingdovetail shapes 1406 that are, for example, cut into thedrive member 1402 by a laser and serve to facilitate flexible movement between the adjoiningjoint segments 1404. Such laser cutting of a tube stock can create a flexible hollow drive tube that can be used in compression, tension and/or torsion. Such an arrangement can employ a full diametric cut that is interlocked with the adjacent part via a “puzzle piece” configuration. These cuts are then duplicated along the length of the hollow drive tube in an array and are sometimes “clocked” or rotated to change the tension or torsion performance. Further to the above, the interlocking dovetailsshapes 1406 are but one example embodiment and, in various circumstances, thedrive member 1402 can comprise any suitable array of articulation joints comprising interlocking drive projections and drive recesses. In various circumstances, thedrive member 1402 can comprise an articulation joint lattice comprising operably engaged projections and recesses which can be interlocked to transmit linear and/or rotary motions therebetween. In a sense, in various embodiments, thedrive member 1402 can comprise a plurality or a multitude of articulation joints defined within the body of thedrive member 1402. Thedrive member 1402 can include a plurality of articulation joints which are intrinsic to the body of thedrive member 1402. - Further to the above, the
drive member 1402 can be pushed distally such that a longitudinal force is transmitted through thedrive member 1402 and to a cutting member, for example, operably coupled with a distal end of thedrive member 1402. Correspondingly, thedrive member 1402 can be pulled proximally such that a longitudinal force is transmitted through thedrive member 1402 and to the cutting member. The interlockingdovetail shapes 1406 can be configured to transmit the longitudinal pushing and pulling forces between thejoint segments 1404 regardless of whether thejoint segments 1404 are longitudinally aligned, as illustrated inFIG. 98 , and/or articulated relative to each other to accommodate the articulation of the articulation joint 1430 which rotatably connects theend effector 1420 to the shaft of the surgical instrument. More particularly, further to the above, the articulation joint 1430 can comprise one ormore articulation segments 1434 which can move relative to one another to permit theend effector 1420 to rotate wherein, in order to accommodate the relative movement of the articulationjoint segments 1434, thejoint segments 1404 of thedrive member 1402 can rotate or shift relative to each other. In at least the illustrated embodiment ofFIG. 97 , the articulationjoint segments 1434 can define a passage 1435 extending therethrough which can be configured to closely receive thedrive tube 1402 and constrain large transverse movements between thejoint segments 1404 while concurrently permitting sufficient relative movement between thejoint segments 1404 when the articulation joint 1430 has been articulated.FIGS. 99-101 illustrate alternative example micro-annularjoint segments 1404′ of adrive member 1402′ that can comprise a plurality of laser cutshapes 1406′ that roughly resemble loosely interlocking, opposed “T” shapes and T-shapes with a notched portion therein, for example. The laser cutshapes 1406′ can also roughly resemble loosely interlocking, opposed “L” shapes and L-shapes defining a notched portion, for example. The annularjoint segments joint segment FIGS. 99 and 100 , thejoint segment 1404D′ on thedistal end 1403′ of thedrive member 1402′ has a distalmounting collar portion 1408D′ that facilitates attachment to other drive components for actuating the end effector. Similarly, thejoint segment 1404P′ on theproximal end 1405′ of thedrive member 1402′ has a proximalmounting collar portion 1408P′ that facilitates attachment to other proximal drive components or portions of a quick disconnect joint, for example. - The joint-to-joint range of motion for each particular
joint segment 1404′ can be increased by increasing the spacing in the laser cuts. In various circumstances, however, the number and/or density of the laser cuts within any particular region of thedrive member 1402′ can cause thedrive member 1402′ to be particularly flexible in that region. To ensure that thejoint segments 1404′ remain coupled together without significantly diminishing the drive tube's ability to articulate through desired ranges of motion, a secondary constraining member can be employed to limit or prevent the outward expansion of thejoint segments 1404′. In the example embodiment depicted inFIGS. 102 and 103 , a secondary constrainingmember 1410 comprises aspring 1412 or an otherwise helically-wound member. In various example embodiments, thedistal end 1414 of thespring 1412 can correspond to and can be attached to the distalmounting collar portion 1408D′ and can be wound tighter than thecentral portion 1416 of thespring 1412. Similarly, theproximal end 1418 of thespring 1412 can correspond to and can be attached to theproximal collar portion 1408P′ and can be wound tighter than thecentral portion 1416 of thespring 1412. As a result of the tighter winding, thedistal end 1414 and/or theproximal end 1418 can comprise coils which are positioned closer together than the coils of thecentral portion 1416. Stated another way, the coils per unit distance of thedistal end 1414 and/or theproximal end 1418 can be greater than the coils per unit distance of thecentral portion 1416. In any event, thespring 1412 can define alongitudinal aperture 1413 within which thedrive member 1402′, and/or thedrive member 1402, for example, can be positioned. Thelongitudinal aperture 1413 and thedrive member 1402′ can be sized and configured such that thedrive member 1402′ is closely received within thelongitudinal aperture 1413 wherein, in various circumstances, the coils of thespring 1412 can limit the outward movement of thejoint segments 1404′ such that thejoint segments 1404′ do not become disconnected from one another when they are articulated relative to one other. As outlined above, thedistal end 1414 of thespring 1412 can be fixedly mounted to thedistal end 1403′ of thedrive member 1402′ and theproximal end 1418 of thespring 1412 can be fixedly mounted to theproximal end 1405′ of thedrive member 1402′ wherein the movement of thedistal tube end 1403′ can move thedistal spring end 1414 and, correspondingly, the movement of theproximal tube end 1405′ can move theproximal spring end 1418. In various circumstances, the spring ends 1414 and 1418 can be welded, for example, to the tube ends 1403′ and 1405′, respectively. In at least the illustrated embodiment, the coils of thecentral portion 1416 may not be fixedly mounted to thedrive member 1402′. In at least one such embodiment, thedrive member 1402′ can be configured to at least partially articulate within the coils of thecentral portion 1416 until thedrive member 1402′ contacts the coils wherein, at such point, the coils can be configured to at least partially expand or shift to accommodate the lateral movement of thedrive member 1402′. In various other embodiments, at least portions of the coils of thecentral portion 1416 can be fixedly mounted, such as by welding, for example, to thedrive member 1402′. - Further to the above, the constraining
member 1410 may be installed on thedrive member 1402′ with a desired pitch such that the constrainingmember 1410 also functions, for example, as aflexible drive thread 1440 which can be threadably engaged with other threaded drive components on the end effector and/or the drive system, as described above. Thedrive member 1402′ can be constrained from being revolved around its longitudinal axis wherein, when a threaded drive input is engaged with thethread 1440 and is rotated in a first direction by a motor, for example, thedrive member 1402′ can be advanced distally within theend effector 1420. Correspondingly, when the threaded drive input engaged with thethread 1440 is rotated in a second, or opposite, direction, thedrive member 1402′ can be retracted proximally. It will be appreciated that the constrainingmember 1410 may be installed in such a manner that thethread 1440 includes a constant, or at least substantially constant, pitch along the length thereof. In such embodiments, thedrive member 1402′ can be advanced and/or retracted at a constant, or an at least substantially constant, rate for a given rate in which the threaded drive input is rotated. It will also be appreciated that the constrainingmember 1410 can be installed in such a manner that thethread 1440 includes a variable pitch, or a pitch which changes along the length of thedrive member 1402′. For example, the variable pitch arrangement of the constrainingmember 1410 may be used to slow thedrive assembly 1400′ down or speed thedrive assembly 1400′ up during certain portions of the firing stroke of thedrive assembly 1400′. For instance a first portion of thethread 1440 can include a first pitch which is smaller than the pitch of a second portion of thethread 1440 wherein the first pitch can drive a closing member at a first rate and the second portion can drive a firing member at a second rate, for example. In at least some forms, for example, the drive shaft assembly comprises a variable pitch thread on a hollow flexible drive shaft that can be pushed and pulled around a ninety degree bend or greater, for example. - As discussed above, the
drive member 1402′ can be constrained from revolving about its longitudinal axis. Moreover, the entiredrive shaft assembly 1400′ can be constrained from rotating about its longitudinal axis. In various embodiments, thedrive member 1402′ can comprise a longitudinal slot defined therein which can be engaged with one or more projections which can extend inwardly from theend effector 1420 and/or the articulationjoint members 1434 into the longitudinal slot, for example. Such an arrangement of the longitudinal slot and the projections can be configured to prevent or at least limit the rotation of thedrive shaft assembly 1400′ about its own longitudinal axis. As used herein, the longitudinal axis of thedrive shaft assembly 1400′, and/or thedrive member 1402′, can extend along the center of thedrive shaft assembly 1400′ regardless of whether thedrive shaft assembly 1400′ is in a straight configuration or a bent configuration. As a result, the path and direction of the longitudinal axis of thedrive shaft assembly 1400′ may change when theend effector 1420 is articulated and thedrive shaft assembly 1400′ articulates to accommodate the articulation of theend effector 1420. Further to the above, thedrive member 1402′ can be fixedly mounted to and extend proximally from a cutting member positioned within theend effector 1420. As described herein, the cutting member can be closely received within various slots and/or channels defined in the end effector which can prevent the cutting member, and thedrive shaft assembly 1400′ extending therefrom, from being rotated, or at least substantially rotated about its longitudinal axis. While the longitudinal axis of thedrive shaft assembly 1400′ can be defined by thedrive member 1402′, the longitudinal axis can be defined by thespring 1412. In at least one such embodiment, the center path of the spring coils can define the longitudinal axis of thedrive shaft assembly 1400′. In any event, thedrive shaft assembly 1400′ can be constrained from revolving around its longitudinal axis. - Turning now to
FIGS. 104 and 105 , thedrive shaft assembly 1400′ can comprise an internal constraining member, such as aflexible core 1417, for example, which can be configured to limit or prevent the inward movement or collapse of thejoint segments 1404′ of thedrive member 1402′. Thedrive member 1402′ can define an internallongitudinal cavity 1415 which can be configured to closely receive theflexible core 1417. In at least one such embodiment, theinternal cavity 1415 defined in thedrive member 1402′ can comprise a diameter or width which is equal to, or at least substantially equal to, the diameter or width of theflexible core 1417. In various circumstances during the articulation of theend effector 1420, for example, portions of thejoint segments 1404′ can deflect or be displaced inwardly toward theflexible core 1417 wherein, when thejoint segments 1404′ contact theflexible core 1417, thecore 1417 can inhibit the inward movement of thejoint segments 1404′ and prevent thedrive member 1402′ from collapsing inwardly. Theflexible core 1417 can be mounted to at least portions of thedrive member 1402′ such as thedistal end 1408D′ and/or theproximal end 1408P′ thereof, for example. In certain embodiments, theflexible core 1417 may not be fixedly mounted to thedrive member 1402′ wherein, in such embodiments, theflexible core 1417 can be held in place by thedrive member 1402′. In any event, theflexible core 1417 can be sufficiently flexible so as to permit thedrive shaft assembly 1400′ to bend or articulate as necessary to transmit the pushing and pulling motions applied thereto, as described above. - As outlined above, the
shaft assembly 1400′, for example, can be configured to bend or flex to accommodate the articulation of theend effector 1420 about the articulation joint 1430. Thedrive member 1402′, theflexible core 1417, and/or thespring 1412 can be resilient such that theshaft assembly 1400′ can return to its original longitudinal configuration, for example. In various circumstances, theend effector 1420 can be rotated from its articulated position back to its longitudinal, or straight, position and, as such, theshaft assembly 1400′ can be configured to bend or flex in order to accommodate the return of theend effector 1420. - Referring to
FIGS. 106-108 , asurgical tool 1000 may include asurgical end effector 1001 and ashaft assembly 1003.Surgical end effector 1001 may be configured to perform surgical activities in response to drive motions applied thereto.Shaft assembly 1003 may be configured to transmit such drive motions tosurgical end effector 1001. Thesurgical end effector 1001 may include afirst jaw member 1002, and asecond jaw member 1004. Thefirst jaw member 1002 may be movable relative to thesecond jaw member 1004 between a first position and a second position. Alternatively, thefirst jaw member 1002 andsecond jaw member 1004 may be moveable relative to each other between a first position and a second position. The first position may be an open position and the second position may be a closed position. - Referring to
FIGS. 106-108 , thefirst jaw member 1002 may be pivotally movable relative to thesecond jaw member 1004 between a first position and a second position. As illustrated inFIG. 108 , thefirst jaw member 1002 may include mounting holes (not shown), and thesecond jaw member 1004 may include mountingholes 1008. Thefirst jaw member 1002 can be arranged relative to thesecond jaw member 1004 such that a pivot or trunnion pin (not shown) is inserted through the mounting holes of thefirst jaw member 1002 and the mountingholes 1008 of thesecond jaw member 1004 to pivotally couple thefirst jaw member 1002 to thesecond jaw member 1004. Other suitable means for coupling thefirst jaw member 1002 and thesecond jaw member 1004 are contemplated within the scope of this disclosure. - Referring to
FIGS. 106-108 ,surgical end effector 1001 may be adapted to perform multiple functions. For example,surgical end effector 1001 may include grippingportions 1010 disposed on exterior surfaces of thefirst jaw member 1002 and/or thesecond jaw member 1004. Grippingportions 1010 may be adapted for contacting and bluntly dissecting tissue. Suitablegripping portions 1010 are described, for example, in connection withFIGS. 116-131 .Surgical end effector 1001 may also include angledtissue engagement surfaces 1012 for transecting tissue. Suitable angledtissue engagement surfaces 1012 are described, for example, in connection withFIGS. 132-142 . Thefirst jaw member 1002 may include aninterior surface 1014 and thesecond jaw member 1004 may include aninterior surface 1016. The first 1014 and second 1016 interior surfaces may be configured to grip, pass, and/or manipulate tissue and/or surgical implements such asneedles 1015 for suturing tissue. This gripping, passing, and/or manipulating functionality is described, for example, in connection withFIGS. 153-168 . Furthermore,surgical end effector 1001 may also includeelectrodes 1017 and/or another electrically active surface for sealing blood vessels during a surgical procedure. Theelectrodes 1017 may be configured to deliver radio frequency (RF) energy to tissue clamped between thefirst jaw member 1002 and thesecond jaw member 1004 when in a closed position to weld/fuse the tissue, which may be transected by translating a cutting member 1018. Suitable electrodes are described, for example, in connection withFIGS. 153-168 . - Referring to
FIGS. 108-111 ,surgical end effector 1001 may be releasably attached toshaft assembly 1003. An operator or a surgeon may attachsurgical end effector 1001 toshaft assembly 1003 to perform a surgical procedure. In the embodiment depicted inFIG. 108 ,shaft assembly 1003 includes a coupling arrangement in the form of a quick disconnect arrangement or joint 1019 that facilitates quick attachment of adistal shaft portion 1020 of theshaft assembly 1003 to aproximal shaft portion 1022 of thesurgical end effector 1001. The quick disconnect joint 1019 may serve to facilitate the quick attachment and detachment of a plurality of drive train components used to provide control motions from a source of drive motions to an end effector that is operably coupled thereto. - As illustrated in
FIG. 112 ,surgical end effector 1001 may be interchanged with other surgical end effectors suitable for use withshaft assembly 1003. For example,surgical end effector 1001 may be detached fromshaft assembly 1003 and a secondsurgical end effector 1024 may be attached toshaft assembly 1003. In another example, the secondsurgical end effector 1024 may be replaced with a thirdsurgical end effector 1026.Surgical end effectors shaft assembly 1003. Yet,surgical end effectors - The
surgical end effector 1001 may include an actuation mechanism. The actuation mechanism may comprise a closure mechanism for moving thefirst jaw member 1002 relative to thesecond jaw member 1004. The actuation mechanism may comprise a firing mechanism for transecting tissue grasped between the first,jaw member 1002 and thesecond jaw member 1004. The closure and firing may be accomplished by separate mechanisms, which may be driven separately or contemporaneously. Alternatively, the closure and firing may be accomplished via a single mechanism. Suitable closure mechanisms and suitable firing mechanisms are described, for example, in connection withFIGS. 64-82 , 83-91 and 92-96. - Referring to
FIG. 113 , anactuation mechanism 1028 is shown. The actuation mechanism may include areciprocating member 1030. The reciprocatingmember 1030 may define acam slot 1032 configured to receive acam pin 1034 coupled to thefirst jaw member 1002. Distal and proximal movement of thereciprocating member 1030 may cause thecam pin 1032 to translate within thecam slot 1034, which may, in turn, cause thefirst jaw member 1002 to pivot from an open position (e.g., proximal position of the reciprocating member 1030) to a closed (e.g., distal position of the reciprocating member 1030). In embodiments where the first 1002 and the second 1004 jaw members are movable, bothjaw members reciprocating member 1030 may define a pair of cam slots or grooves. The reciprocatingmember 1030 may comprise an I-beam member adapted to slide over thejaw members jaw members jaw members member 1030 may include acutting blade 1036. Thecutting blade 1036 may be attached to thereciprocating member 1030 and situated such that it can be extended and retracted with the reciprocatingmember 1030. The cutting member may be extended to transect tissue or material present between thejaw members - Referring to
FIGS. 108-111 , theactuation mechanism 1028 may include arotary drive nut 1038 and a threadedrotary drive member 1040. Therotary drive member 1040 may extend proximally from the reciprocatingmember 1030. The reciprocatingmember 1030 and therotary drive member 1040 may be formed together as one piece. Alternatively, the reciprocatingmember 1030 and therotary drive member 1040 may be formed separately and welded together. Other techniques for joining thereciprocating member 1030 and therotary drive member 1040 may be employed and are contemplated within the scope of this disclosure. Therotary drive nut 1038 may be operably supported within theproximal shaft portion 1022 of thesurgical end effector 1001, which extends proximally relative to thejaw members rotary drive nut 1038 may be rotated around a central axis extending through theproximal shaft portion 1022, for example, as described herein above. Therotary drive member 1040 may extend proximally from the reciprocatingmember 1030 along the central axis through therotary drive nut 1038. Therotary drive nut 1038 and therotary drive member 1040 may be arranged in a mating arrangement such that rotation of therotary drive nut 1038 around the central axis in one direction (e.g. clockwise direction) may advance therotary drive member 1040, and rotation of therotary drive nut 1038 around the central axis in the opposite direction (e.g. counter clockwise direction) may retract therotary drive member 1040. This actuation mechanism and other suitable actuations mechanisms are described, for example, in connection withFIGS. 64-82 , 83-91 and 92-96. - Referring to
FIGS. 108-111 , thesurgical tool 1000 may include arotary drive shaft 1042 disposed longitudinally throughshaft assembly 1003. Therotary drive shaft 1042 may include arotary drive head 1044 at a distal portion thereof. Therotary drive nut 1038 may comprise anactuation coupler 1046 for mating arrangement with therotary drive head 1044 such that when coupled, therotary drive head 1044 may transmit rotary motions to theactuation coupler 1046. Therotary drive shaft 1042 may be selectively moved axially between multiple discrete positions. For example, therotary drive shaft 1042 may be extended axially to bring therotary drive head 1044 into operable engagement with theactuation coupler 1046 as depicted inFIG. 111 . Alternatively, therotary drive shaft 1042 may be retracted axially to disengage therotary drive head 1044 from theactuation coupler 1046. Such arrangement may allow for a quick and efficient attachment and detachment of a plurality of surgical end effectors toshaft assembly 1003. - Referring to
FIGS. 108-110 ,surgical end effector 1001 is shown detached fromshaft assembly 1003. Theproximal shaft portion 1022 ofsurgical end effector 1001 is disengaged from thedistal shaft portion 1020 of theshaft assembly 1003. As depicted inFIG. 108 , theproximal shaft portion 1022 of thesurgical end effector 1001 may include a tapered end for mating arrangement with a funneling end on thedistal shaft portion 1020 of theshaft assembly 1003. Therotary drive shaft 1042 may include a hollow distal portion that extends distally along a central axis through therotary drive head 1044 and terminates at a distal opening thereof. The hollow distal portion may receive a proximal portion of therotary drive member 1040 when thesurgical end effector 1001 is attached to theshaft assembly 1003. Therotary drive member 1040 may rotate freely in the hollow distal portion of therotary drive shaft 1042. As depicted inFIG. 110 , thesurgical end effector 1001 is attached toshaft assembly 1003 simply by inserting the proximal portion of therotary drive member 1040 into the hollow portion of therotary drive shaft 1042 and guiding the tapered end of theproximal shaft portion 1022 of thesurgical end effector 1001 into a mating arrangement with the funneling end of thedistal shaft portion 1020 of theshaft assembly 1003. As depicted inFIG. 111 , once thesurgical end effector 1001 is attached toshaft assembly 1003, therotary drive shaft 1042 may be advanced to bring therotary drive head 1044 into operable engagement with theactuation coupler 1046 to transmit rotary motions to therotary drive nut 1038. Other attachment means and techniques for releasably attaching thesurgical end effector 1001 to theshaft assembly 1003 are contemplated within the scope of this disclosure. - As illustrated in
FIGS. 108-110 , theproximal shaft portion 1022 ofsurgical end effector 1001 and thedistal shaft portion 1020 of theshaft assembly 1003 may have aligning features to ensure that thesurgical end effector 1001 and theshaft assembly 1003 are correctly aligned upon attachment. In an example embodiment, as illustrated inFIG. 108 , theproximal shaft portion 1022 ofsurgical end effector 1001 includes akey feature 1048 and thedistal shaft portion 1020 of theshaft assembly 1003 may include aslot 1050 for receiving the key feature. Other aligning means and techniques for aligning thesurgical end effector 1001 to theshaft assembly 1003 are contemplated within the scope of this disclosure. - Referring to
FIG. 114 , thesurgical end effector 1001 may include an actuation mechanism wherein the firing and closure are performed separately. This actuation mechanism and other suitable actuation mechanisms are described, for example, in connection withFIGS. 83-91 and 92-96. In an example embodiment, as illustrated inFIG. 114 , thesurgical end effector 1001 comprises aclosure mechanism 1052 and afiring mechanism 1054 which are driven separately. Theclosure mechanism 1052 includes aclosure driver 1056 and thefiring mechanism 1054 includes afiring driver 1058. As described above,surgical end effector 1001 may be releasably attached toshaft assembly 1003. As depicted inFIG. 114 , theproximal shaft portion 1022 ofsurgical end effector 1001 may be detached from thedistal shaft portion 1020 of theshaft assembly 1003. Once theproximal shaft portion 1022 ofsurgical end effector 1001 is attached to thedistal shaft portion 1020 of theshaft assembly 1003, theshaft drive 1042 may be extended distally to a first discrete position to be in operable engagement with theclosure driver 1056. Alternatively, the shaft drive may be extended distally to a second discrete position distal to the first discrete position to be in operable engagement with thefiring driver 1058. - As illustrated in
FIG. 115 , thesurgical tool 1000 may include an articulation joint 1060 for articulating thesurgical end effector 1001 about a longitudinal tool axis “LT”. In this example embodiment, the articulation joint 1060 is disposed proximal to thedistal portion 1020 of theshaft assembly 1003. The articulation joint 1060 articulates thedistal portion 1020 of theshaft assembly 1003. When theproximal portion 1022 of thesurgical end effector 1001 is attached to thedistal portion 1020 of theshaft assembly 1003, articulation of thedistal portion 1020 ofshaft assembly 1003 will cause thesurgical end effector 1003 to articulate. - In an example embodiment, as illustrated in
FIG. 115 , the articulation joint 1060 includes aproximal socket tube 1062 that is attached to theshaft assembly 1003 and defines a proximal ball socket therein. SeeFIG. 115 . Aproximal ball member 1064 is movably seated within the proximal ball socket. As can be seen inFIG. 115 , theproximal ball member 1064 has a central drive passage that enables therotary drive shaft 1042 to extend therethrough. In addition, theproximal ball member 1064 has four articulation passages therein which facilitate the passage of fourdistal cables 1066 therethrough. As can be further seen inFIG. 115 , the articulation joint 1060 further includes an intermediatearticulation tube segment 1068 that has an intermediate ball socket formed therein. The intermediate ball socket is configured to movably support therein adistal ball member 1070 formed on adistal connector tube 1072. Thecables 1066 extend through cable passages formed in thedistal ball member 1070 and are attached thereto bylugs 1074. Other attachment means suitable for attaching cables to theend effector ball 1070 are contemplated within the scope of this disclosure. - Referring to
FIGS. 116-120 , asurgical tool 900 may include a surgical end effector extending from ashaft assembly 903. Thesurgical end effector 901 may be configured to perform surgical activities in response to drive motions applied thereto. Thesurgical end effector 901 may include afirst jaw member 902, and asecond jaw member 904. Thefirst jaw member 902 may be movable relative to thesecond jaw member 904 between a first position and a second position. Alternatively, thefirst jaw member 902 andsecond jaw member 904 may be moveable relative to each other between a first position and a second position. The first position may be an open position and the second position may be a closed position. - Referring to
FIGS. 116-120 , thefirst jaw member 902 may be pivotally movable relative to thesecond jaw member 904 between an open position and a closed position. As illustrated inFIG. 120 , thefirst jaw member 902 may include mountingholes 906, and thesecond jaw member 904 may include mountingholes 908. Thefirst jaw member 902 can be arranged relative to thesecond jaw member 904 such that a pivot or trunnion pin (not shown) is inserted through the mountingholes 906 of thefirst jaw member 902 and the mountingholes 908 of thesecond jaw member 904 to pivotally couple thefirst jaw member 902 to thesecond jaw member 904. Other suitable means for coupling thefirst jaw member 902 and thesecond jaw member 904 are contemplated within the scope of this disclosure. - Referring to
FIGS. 116-120 ,surgical end effector 901 may be adapted to perform multiple functions. For example,surgical end effector 901 may include angled tissue engagement surfaces 910 for transecting tissue. Suitable tissue engagement surfaces 910 are described, for example, in connection withFIGS. 132-142 . Thefirst jaw member 902 may include aninterior surface 912 and thesecond jaw member 904 may include aninterior surface 914. The firstinterior surface 912 and the secondinterior surface 914 may be configured to grip, pass, and/or manipulate tissue and/or surgical implements such asneedles 915 for suturing tissue. This gripping, passing, and/or manipulating functionality is described, for example, in connection withFIGS. 153-168 . - Referring to
FIGS. 116-120 , thesurgical end effector 901 may also includeelectrodes 916 and/or another electrically active surface for sealing blood vessels during a surgical procedure. Theelectrodes 916 may be configured to deliver radio frequency (RF) energy to tissue clamped between thefirst jaw member 902 and thesecond jaw member 904 when in a closed position to weld/fuse the tissue, which may be transected by translating a cutting member.Suitable electrodes 916 are described, for example, in connection withFIGS. 6-10 andFIGS. 153-168 . Thesurgical end effector 901 may be releasably attached to ashaft assembly 903. An operator or a surgeon may attachsurgical end effector 901 toshaft assembly 903 to perform a surgical procedure. Suitable techniques and mechanisms for releasably attaching thesurgical end effector 901 to theshaft assembly 903 are described, for example, in connection withFIGS. 106-115 . - Referring to
FIGS. 116-120 , thesurgical end effector 901 may include an actuation mechanism. The actuation mechanism may comprise a closure mechanism for moving the first jaw member relative to the second jaw member. The actuation mechanism may comprise a firing mechanism for transecting tissue grasped between the first jaw member and the second jaw member. The closure and firing may be accomplished by separate mechanisms, which may be driven separately or contemporaneously. Alternatively, the closure and firing may be accomplished by a single mechanism. Suitable closure mechanisms and suitable firing mechanisms are described, for example, in connection withFIGS. 64-82 , 83-91 and 92-96. - As illustrated in
FIG. 117 , anexample actuation mechanism 920 is shown. Theactuation mechanism 920 may include a reciprocatingmember 918 similar to the axiallymovable member 3016 described herein above. The reciprocatingmember 918, or acam pin 924 thereof, may be received within acam slot 922. Distal and proximal movement of the reciprocatingmember 918 may cause thecam pin 924 to translate within thecam slot 922, which may, in turn, cause thefirst jaw member 902 to pivot from an open position (e.g., proximal position of the reciprocating member 918) to a closed (e.g., distal position of the reciprocating member 918). In embodiments where the first 902 and the second 904 jaw members are movable, both jaw members may comprisecam slot 922 and the reciprocatingmember 918 may define a pair of cam pins. The reciprocatingmember 918 may comprise an I-beam member adapted to slide over thefirst jaw member 902 and thesecond jaw member 904 to close thefirst jaw member 902 and thesecond jaw member 904, and/or to provide a clamping force tending to force thefirst jaw member 902 and thesecond jaw member 904 together. The reciprocatingmember 918 may include acutting blade 926. Thecutting blade 926 may be attached to the reciprocatingmember 918 and situated such that it can be extended and retracted with the reciprocatingmember 918. Thecutting blade 926 may be extended to transect tissue or material present between thefirst jaw member 902 and thesecond jaw member 904. - Referring to
FIGS. 116-120 , thefirst jaw member 902 may include anexterior surface 928. The exterior surface offirst jaw member 902 may include a firsttissue gripping portion 930. Thesecond jaw member 904 may also include anexterior surface 932. Theexterior surface 932 ofsecond jaw member 904 may include a secondtissue gripping portion 934. The firsttissue gripping portion 930 and secondtissue gripping portion 934 may grip tissue by contacting and temporarily adhering to tissue. The firstgripping portion 930 and the secondgripping portion 934 may contact and bluntly dissect tissue while thefirst jaw member 902 and thesecond jaw member 904 is moving relative to each other from the closed position to the open position. - In an example embodiment, the
surgical end effector 901 may be utilized during a surgical procedure to dissect tissue. For example, the firstgripping portion 930 and the secondgripping portion 934 may contact and temporarily adhere to a first and second tissue portions (not shown) respectively such that when thefirst jaw member 902 is moved relative to thesecond jaw member 904 from a closed position to an open position, the first tissue portion is separated from the second tissue portion along facial planes while substantially preserving locoregional architecture and structural integrity of vessels and nerves. The firstgripping portion 930 and the secondgripping portion 934 may be configured to create operative space during a surgical procedure by bluntly separating (dissecting) tissue layers as thefirst jaw member 902 is moved relative to thesecond jaw member 904. - As illustrated in
FIG. 121 , the firstgripping portion 930 and the secondgripping portion 934 may be formed onto distal sections of theexterior surfaces second jaw members gripping portions exterior surfaces gripping portions exterior surfaces - The first and second
gripping portions second jaw members second jaw members gripping portions - The first and second
gripping portions gripping portions gripping portions - Referring to
FIGS. 116-120 , the first and secondgripping portions protrusions 938. In at least one embodiment, the grippingfeatures 936 may be in the form ofdepressions 940. - Referring to
FIGS. 121-126 , the grippingfeatures 936 may be spatially arranged in agripping pattern 942.Gripping pattern 942 may include a plurality ofprotrusions 938. The gripping pattern may include a plurality ofdepressions 940. In at least one embodiment, as illustrated in FIG., 127 thegripping pattern 942 may include a plurality of alternatingprotrusions 938 anddepressions 940. In one embodiment, as illustrated inFIG. 123 , thegripping pattern 942 may include fourprotrusions 938. - As illustrated in
FIG. 128 ,gripping pattern 942 may include a plurality ofprotrusions 940 spatially arranged in a circle. Other arrangements are possible and within the scope of the present disclosure. As illustrated inFIG. 122 ,gripping pattern 942 may include a plurality ofprotrusions 938 spatially arranged in multiple rows wherein each row includesseveral protrusions 938 aligned along the length of the row. Each row may include alternatingprotrusions 938 anddepressions 940. - Referring to
FIG. 123-128 , thegripping pattern 942 may includevertical protrusions 938 that extend horizontally on grippingportion 930. As illustrated in FIG., thevertical protrusions 938 may extend in opposing directions. In certain embodiments, as illustrated inFIG. 124 , theprotrusions 938 may extend in parallel rows. In at least one embodiment, as illustrated inFIG. 125 ,gripping pattern 942 includes a first plurality ofparallel protrusions 938 a, and a second plurality ofparallel protrusions 938 b, wherein thefirst plurality 938 a is in a slanted arrangement with thesecond plurality 938 b. In at least one embodiment, as illustrated inFIG. 125 , the grippingportion 930 may include a herringbone pattern. - Referring to
FIGS. 129-131 , thegripping pattern 942 may definevertical protrusions 938 that extend horizontally on grippingportion 930 in a non linear fashion. For example, as illustrated inFIG. 129 , thenon-linear protrusions 938 may extend in a in a zigzag fashion. In certain embodiments, as illustrated inFIGS. 130 and 131 , thenon-linear protrusions 938 may extend in parallel rows. In certain embodiments, as illustrated inFIGS. 130 , and 131, thenon-linear protrusions 938 may extend in opposing directions. - Referring to
FIGS. 132 through 137 , anend effector 500 comprises afirst jaw member 502A and asecond jaw member 502B. Thefirst jaw member 502A is movable relative to thesecond jaw member 502B between an open position (FIGS. 132 and 136 ) and a closed position (FIGS. 133 , 134, and 137) to clamp tissue between thefirst jaw member 502A and thesecond jaw member 502B. Thefirst jaw member 502A comprises angled tissue-contactingsurfaces second jaw member 502B comprises angled tissue-contactingsurfaces first jaw member 502A comprises a first positively-angled tissue-contactingsurface 504A and a first negatively-angled tissue-contactingsurface 506A. Thesecond jaw member 502B comprises a second positively-angled tissue-contactingsurface 504B and a second negatively-angled tissue-contactingsurface 506B. - As used herein, the terms “positively-angled” and “negatively-angled” refer to the direction in which a tissue-contacting surface is angled relative to the body of the jaw member comprising the tissue-contacting surface and a clamping plane of the jaw member. Referring to
FIG. 138 , afirst jaw member 502A′ and asecond jaw member 502B′ are shown in a closed position such as to clamp tissue between theopposed jaw members 502A′ and 502B′. This closed position is analogous to the closed position shown inFIGS. 133 , 134, 135, 137, and 142. Thefirst jaw member 502A′ comprises afirst jaw body 503A′, a firsttissue gripping element 507A′, and afirst clamping plane 505A. Thesecond jaw member 502B′ comprises asecond jaw body 503B′, a secondtissue gripping element 507B′, and asecond clamping plane 505B. Generally, the tissue gripping elements and the clamping planes of the jaw members of an end effector are in an opposed orientation when the jaw members are in a closed position such as to clamp tissue between opposed jaw members. - The
first jaw member 502A′ comprises a first positively-angled tissue-contactingsurface 504A′ forming an angle (α) relative to thefirst clamping plane 505A and away from thefirst jaw body 503A′ at the periphery of the firsttissue gripping element 507A′ of thefirst jaw member 502A′. Thefirst jaw member 502A′ comprises a first negatively-angled tissue-contactingsurface 506A′ forming an angle (α) relative to thefirst clamping plane 505A and toward from thefirst jaw body 503A′ at the periphery of the firsttissue gripping element 507A′ of thejaw member 502A′. - Accordingly, as used herein, the term “positively-angled” is used to specify tissue-contacting surfaces that angle away from a clamping plane and that angle away from the jaw body at the periphery of the tissue gripping element of the jaw member comprising the positively-angled tissue-contacting surface. Likewise, as used herein, the term “negatively-angled” is used to specify tissue-contacting surfaces that angle away from a clamping plane and that angle toward the jaw body at the periphery of the tissue gripping element of the jaw member comprising the negatively-angled tissue-contacting surface.
- Thus, the
second jaw member 502B′ comprises a second positively-angled tissue-contactingsurface 504B′ forming an angle (α) relative to thesecond clamping plane 505B and away from thesecond jaw body 503B′ at the periphery of the secondtissue gripping element 507B′ of thesecond jaw member 502B′. Thesecond jaw member 502B′ comprises a second negatively-angled tissue-contactingsurface 506A′ forming an angle (α) relative to thesecond clamping plane 505B and toward from thesecond jaw body 503B′ at the periphery of the secondtissue gripping element 507B′ of thesecond jaw member 502B′. - Referring again to
FIGS. 132-134 , thefirst jaw member 502A comprises afirst jaw body 503A and a firsttissue gripping element 507A, and thesecond jaw member 502B comprises asecond jaw body 503B and a secondtissue gripping element 507B. The first positively-angled tissue-contactingsurface 504A of thefirst jaw member 502A is angled away from thefirst jaw body 503A at the periphery of the firsttissue gripping element 507A. The first negatively-angled tissue-contactingsurface 506A of thefirst jaw member 502A is angled toward thefirst jaw body 503A at the periphery of the firsttissue gripping element 507A. The second positively-angled tissue-contactingsurface 504B of thesecond jaw member 502B is angled away from thesecond jaw body 503B at the periphery of the secondtissue gripping element 507B. The second negatively-angled tissue-contactingsurface 506B of thesecond jaw member 502B is angled toward thesecond jaw body 503B at the periphery of the secondtissue gripping element 507B. - When the
first jaw member 502A and thesecond jaw member 502B are in a closed position, such as to clamp tissue between the first and second jaw members, the first positively-angled tissue-contactingsurface 504A opposes the second negatively-angled tissue-contactingsurface 506B. When thefirst jaw member 502A and thesecond jaw member 502B are in a closed position, such as to clamp tissue between the first and second jaw members, the first negatively-angled tissue-contactingsurface 506A opposes the second positively-angled tissue-contactingsurface 504B. - As shown in
FIGS. 132-133 and 136-137, the first positively-angled tissue-contactingsurface 504A and the first negatively-angled tissue-contactingsurface 506A are disposed along substantially the entire length of thefirst jaw member 502A. The second positively-angled tissue-contactingsurface 504B and the second negatively-angled tissue-contactingsurface 506B are disposed along substantially the entire length of thesecond jaw member 502B. - The
end effector 500 comprises an “I-beam”member 508, which in some embodiments, may function as a closure member and/or a tissue-cutting member. The I-beam member 508 may operate in a manner similar to that described herein above with respect to the axiallymovable member 3016 described herein above. The I-beam member 508 may be sized and configured to fit at least partially within channels in thefirst jaw member 502A and thesecond jaw member 502B. The I-beam member 508 may operably translate along the channels in thefirst jaw member 502A and thesecond jaw member 502B, for example, between a first, proximally retracted position correlating with thejaw members jaw members beam member 508 may be configured to operably translate within the channels in the first andsecond jaw members tissue gripping elements second jaw members - The movement of the
first jaw member 502A relative to thesecond jaw member 502B between an open position (FIGS. 132 and 136 ) and a closed position (FIGS. 133 , 134, and 137) to clamp tissue between thefirst jaw member 502A and thesecond jaw member 502B may be actuated with a suitable closure actuation mechanism. Translation of the I-beam member between a retracted position and an advanced position may be actuated with a suitable translation actuation mechanism. Suitable closure actuation mechanisms and suitable translation actuation mechanisms are described, for example, in connection withFIGS. 64-82 , 83-91 and 92-96. - Referring to
FIGS. 139 and 140 , anend effector 510 comprises afirst jaw member 512A and asecond jaw member 512B. Thefirst jaw member 512A is movable relative to thesecond jaw member 512B between an open position (FIGS. 139 and 140 ) and a closed position (no shown) to clamp tissue between thefirst jaw member 512A and thesecond jaw member 512B. Thefirst jaw member 512A comprises angled tissue-contactingsurfaces second jaw member 512B comprises angled tissue-contactingsurfaces first jaw member 512A comprises a first positively-angled tissue-contactingsurface 514A and a first negatively-angled tissue-contactingsurface 516A. Thesecond jaw member 512B comprises a second positively-angled tissue-contactingsurface 514B and a second negatively-angled tissue-contactingsurface 516B. - The
first jaw member 512A comprises afirst jaw body 513A and a firsttissue gripping element 517A, and thesecond jaw member 512B comprises asecond jaw body 513B and a secondtissue gripping element 517B. The first positively-angled tissue-contactingsurface 514A of thefirst jaw member 512A is angled away from afirst jaw body 513A at the periphery of the firsttissue gripping element 517A. The first negatively-angled tissue-contactingsurface 516A of thefirst jaw member 512A is angled toward thefirst jaw body 513A at the periphery of the firsttissue gripping element 517A. The second positively-angled tissue-contactingsurface 514B of thesecond jaw member 512B is angled away from asecond jaw body 513B at the periphery of the secondtissue gripping element 517B. The second negatively-angled tissue-contactingsurface 516B of thesecond jaw member 512B is angled toward thesecond jaw body 513B at the periphery of the secondtissue gripping element 517B. - When the
first jaw member 512A and thesecond jaw member 512B are in a closed position, such as to clamp tissue between the first and second jaw members, the first positively-angled tissue-contactingsurface 514A opposes the second negatively-angled tissue-contactingsurface 516B. When thefirst jaw member 512A and thesecond jaw member 512B are in a closed position, such as to clamp tissue between the first and second jaw members, the first negatively-angled tissue-contactingsurface 516A opposes the second positively-angled tissue-contactingsurface 514B. - The first positively-angled tissue-contacting
surface 514A is disposed along a proximal portion of the length of thefirst jaw member 512A. The second positively-angled tissue-contactingsurface 514B is disposed along a proximal portion of the length of thesecond jaw member 512B. The first negatively-angled tissue-contactingsurface 516A is disposed along substantially the entire length of thefirst jaw member 512A. The second negatively-angled tissue-contactingsurface 516B is disposed along substantially the entire length of thesecond jaw member 502B. - The
end effector 510 comprises an “I-beam”member 518, which in some embodiments, may function as a closure member and/or a tissue-cutting member. The I-beam member 518 may be sized and configured to fit at least partially within channels in thefirst jaw member 512A and thesecond jaw member 512B. The I-beam member 518 may translate along the channels in thefirst jaw member 512A and thesecond jaw member 512B, for example, between a first, proximally retracted position correlating with thejaw members jaw members beam member 518 may be configured to operably translate within the channels in the first andsecond jaw members tissue gripping elements second jaw members - The movement of the
first jaw member 512A relative to thesecond jaw member 512B between an open position (FIGS. 139 and 140 ) and a closed position (not shown) to clamp tissue between thefirst jaw member 512A and thesecond jaw member 512B may be actuated with a suitable closure actuation mechanism. Translation of the I-beam member between a retracted position and an advanced position may be actuated with a suitable translation actuation mechanism. Suitable closure actuation mechanisms and suitable translation actuation mechanisms are described, for example, in connection withFIGS. 64-82 , 83-91 and 92-96. - The
first jaw member 512A and thesecond jaw member 512B comprise a first distaltextured portion 519A and second distaltextured portion 519B, respectively. The first distaltextured portion 519A of thefirst jaw member 512A is disposed distal and directly adjacent to the proximaltissue gripping element 517A of thefirst jaw member 512A comprising the first positively-angled tissue-contactingsurface 514A. The first positively-angled tissue-contactingsurface 514A does not extend distally along the length of thefirst jaw member 512A into the first distaltextured portion 519A. The second distaltextured portion 519B of thesecond jaw member 512B is disposed distal and directly adjacent to the proximaltissue gripping element 517B of thesecond jaw member 512B comprising the second positively-angled tissue-contactingsurface 514B. The second positively-angled tissue-contactingsurface 514B does not extend distally along the length of thesecond jaw member 512B into the second distaltextured portion 519B. The first and second distaltextured portions second jaw members end effector 510 to grip, pass, and/or manipulate surgical implements such as needles for suturing tissue, in addition to gripping tissue, for example, during dissection operations. This gripping, passing, and/or manipulating functionality is described, for example, in connection withFIGS. 116-131 and 154-164. - The
first jaw member 512A and thesecond jaw member 512B comprise a firstgripping portion 521A and secondgripping portion 521B, respectively. The firstgripping portion 521A is disposed on an outwardly-facing surface of thefirst jaw member 512A, and the secondgripping portion 521B is disposed on an outwardly-facing surface of thesecond jaw member 512B. Thegripping portions FIGS. 116-131 and 154-164. -
FIG. 141 is a perspective view of anend effector 510′ similar to theend effector 510 shown inFIGS. 139 and 140 , but comprisingelectrodes 522 located in the secondtissue gripping element 517B of thesecond jaw member 516B and located between the second positively-angled tissue-contactingsurface 514B and the second negatively-angled tissue-contactingsurface 516B. Theelectrodes 522 may be configured to deliver RF energy to tissue clamped between thefirst jaw member 512A and thesecond jaw member 512B when in a closed position to weld/fuse the tissue, which may be transected by translating the I-beam member 518 comprising a cutting member. AlthoughFIG. 141 shows twoelectrodes 522, it is understood that an end-effector in accordance with the embodiments described in this specification may comprise at least one or more electrodes comprising any suitable shape and orientation, as described, for example, in this specification. Thesecond jaw member 516B also comprises an offsetelectrode 524 at thedistal tip 525 configured to deliver RF energy to tissue during dissection operations, for example. In some embodiments, the first distaltextured portion 519A and second distaltextured portion 519B may also be electrodes configured, for example, to deliver RF energy to tissue during dissection operations. This electrode functionality is described, for example, in connection withFIGS. 154-164 . - Referring to
FIG. 142 , anend effector 530 comprises afirst jaw member 532A and asecond jaw member 532B shown in a closedposition clamping tissue 545 between the jaw members. Thefirst jaw member 532A comprises a first positively-angled tissue-contactingsurface 534A and a first negatively-angled tissue-contactingsurface 536A. Thesecond jaw member 532B comprises a second positively-angled tissue-contactingsurface 534B and a second negatively-angled tissue-contactingsurface 536B. Thetissue 545 physically contacts the angled tissue-contactingsurfaces tissue 545 and the angled tissue-contactingsurfaces tissue 545 between thefirst jaw member 532A and thesecond jaw member 532B. As shown inFIG. 142 , the clamping of the tissue between thefirst jaw member 532A and thesecond jaw member 532B compresses thetissue 545 between the mutually opposed tissue-contactingsurfaces surfaces compressed tissue 545. The tortuous deformation improves the clamping action of theend effector 530 on thetissue 545, which in turn, improves the welding/fusion of thetissue 545 and/or the transection of thetissue 545. Thetissue 545 can be welded/fused, for example, by the application of RF energy throughelectrodes 542 located in the tissue gripping element of thesecond jaw member 532B and located between the second positively-angled tissue-contactingsurface 534B and the second negatively-angled tissue-contactingsurface 536B. Thetissue 545 can be transected, for example, by translating the I-beam member 538, which translates the cuttingmember 541 through the clampedtissue 545. - In some embodiments, an end effector may comprise a first jaw member comprising a first positively-angled tissue-contacting surface and a first negatively-angled tissue-contacting surface, and a second jaw member comprising a second positively-angled tissue-contacting surface and a second negatively-angled tissue-contacting surface. The angled tissue-contacting surfaces may form angles (α) relative to a clamping plane as described, for example, in connection with
FIG. 138 . The magnitude of the angle (α) between a tissue contacting surface and a clamping plane may range from 5-degrees to 85-degrees or any sub-range subsumed therein such as, for example, from 10-degrees to 80-degrees, from 20-degrees to 70-degrees, from 30-degrees to 60-degrees, from 40-degrees to 50-degrees, from 25-degrees to 50-degrees, or from 30-degrees to 45-degrees. - In some embodiments, angled tissue-contacting surfaces may independently form angles relative to respective clamping planes. The angle formed by the angled tissue-contacting surfaces may be substantially the same or different in a given end effector. For example, two opposed angled tissue-contacting surfaces (e.g., a first positively-angled tissue-contacting surface and an opposed second negatively-angled tissue-contacting surface) may both form a common angle (α1) relative to respective clamping planes, and two other opposed angled tissue-contacting surfaces (e.g., a first negatively-angled tissue-contacting surface and an opposed second positively-angled tissue-contacting surface) may both form a common angle (α2) relative to respective clamping planes, wherein |α1|≠|α2|.
- In some embodiments, an angled tissue-contacting surface may extend a predetermined distance normal to a respective clamping plane coincident with a horizontal tissue contacting portion of a jaw member. For example, referring to
FIG. 138 , the first positively-angled tissue-contactingsurface 504A′ extends a distance normal to thefirst clamping plane 505A, and the second positively-angled tissue-contactingsurface 504B′ extends a distance normal to thesecond clamping plane 505B. Likewise, the first negatively-angled tissue-contactingsurface 506A′ extends a distance normal to thefirst clamping plane 505A, and the second negatively-angled tissue-contactingsurface 506B′ extends a distance normal to thesecond clamping plane 505B. In some embodiments, an angled tissue-contacting surface may extend a distance between 0.025 inch to 0.25 inch normal to a respective clamping plane, or any sub-range subsumed therein such as, for example, 0.025 inch to 0.01 inch or 0.025 inch to 0.05 inch. - While the angled tissue-contacting surfaces shown in
FIGS. 132 through 142 are illustrated as being planar surfaces, it is to be appreciated that in some embodiments, the angled tissue-contacting surfaces may be curved surfaces or a combination of planar surfaces and curved surfaces. - In some embodiments, end effectors comprising angled tissue-contacting surfaces may be configured to operably couple to robotic surgical systems such as, for example, the robotic surgical systems described in connection with, for example,
FIGS. 1-45 . In some embodiments, end effectors having angled tissue-contacting surfaces may be configured to operably couple to hand-held surgical devices such as, for example, the hand-held surgical devices described in connection withFIGS. 46-63 . - The angled tissue-contacting surfaces described in connection with
FIGS. 132 through 142 provide various advantages to end effectors configured to grip/clamp tissue, weld/fuse tissue, transect tissue, or any combination of these operations. For example, in some embodiments, as illustrated inFIGS. 132 through 142 , the positively-angled tissue contacting surfaces are integral with the outer surfaces of the jaw members (i.e., formed from a single piece of material). As such, the positively-angled tissue contacting surfaces provide for a thicker jaw member structure in the thickness dimension (labeled dimension T inFIGS. 141 and 142 ). The thicker jaw member structure increases the strength and stiffness of the jaw members, which provides improved gripping/clamping load to tissue. In some embodiments, for example, a thicker jaw member structure provided by positively-angled tissue contacting surfaces may increase the moment of inertia of the jaw members by 20-30% relative to jaw members comprising co-planar tissue-contacting surfaces. An increased moment of inertia may provide an improved weld zone for fusing and cauterizing tissue clamped in an end effector comprising angled tissue-contacting surfaces by providing a more focused area for RF energy to enter and fuse tissue. - Any of the electrosurgical tools described herein may be energized utilizing current/energy paths extending from the generator or other signal source (such as generator 3002) through conductors, such as the
supply 3012 and return 3014 conductors (seeFIG. 6 ), through the shaft assembly to the electrode or electrodes. Within the shaft assembly, the current paths may be provided by wires that extend through the shaft assembly. Wires, however, must be configured to avoid kinking, twisting or other deformation at the various articulation and rotation joints of the tools, including the articulation joint 3500 described herein. In the illustrated embodiments, an electrosurgical tool may utilize components of the shaft assembly as current paths for energizing electrosurgical electrodes. This may eliminate the need for wires and simplify articulation and rotation of the surgical tool. - In the illustrated embodiments, a rotary connector assembly may be utilized to allow a rotary drive shaft or other internal component of the shaft assembly to provide an energized current path between a generator and the end effector and/or an electrode thereof. The rotary connector may be configured to maintain a connection between the energized current path and the end effector despite rotation of the shaft and/or end effector. In bi-polar configurations, a return path may be formed by conductive components of the shaft and end effector such as, for example, a skin of the shaft, the I-beam member or other knife, portions of the various jaw members, etc., as described herein
-
FIGS. 143-146 illustrate one embodiment of arotary connector assembly 1100 installed in anend effector 550 andshaft assembly 560 as described herein with respect toFIGS. 64-81 .FIG. 143 is a cross-sectional view of one embodiment of theend effector 550 andshaft assembly 560 illustrating an example installation of therotary electrode assembly 1100.FIG. 144 is an exploded view of one embodiment of theend effector 550 andshaft assembly 560 showing therotary electrode assembly 1100 both installed on the rotary drive shaft 630 (indicated byreference numbers 1100′, 1102′, 1104′) and exploded (indicated byreference numbers FIG. 145 is a cross-sectional view of one embodiment of theend effector 550 andshaft assembly 560 showing therotary electrode assembly 1100 with arotary drive head 632 in a proximal position.FIG. 146 is a cross-sectional view of one embodiment of theend effector 550 andshaft assembly 560 showing therotary electrode assembly 1100 with therotary drive head 632 in a distal position. - The
rotary electrode assembly 1100 may be positioned within the endeffector drive housing 608 and may comprise anouter contact 1102 and aninner contact 1103. Theouter contact 1102 may be positioned around an inner wall of the endeffector drive housing 608. In the illustrated embodiment, and in functionally similar embodiments, theouter contact 1102 may be in the shape of a cylinder or other figure of revolution. Theouter contact 1102 may be in electrical communication with one ormore electrodes 1112 in theend effector 550 via one or more leads, such aslead 1110. Thelead 1110 may be in physical contact with theouter contact 1102 and may extend through thelower jaw member 602B to theelectrode 1112 as shown. Thelead 1110 may be fastened to theelectrode 1112 in any suitable manner including, for example, with a solder or other similar joint. For example, multiple energized electrodes may be utilized with onelead 1110 directed to each electrode. In the illustrated embodiment, thelead 1110 may be insulated so as to avoid electrical communication with other portions of theend effector 550 andshaft assembly 560. - The
inner contact 1103 may be physically coupled to therotary drive shaft 630, for example, proximal from thehex coupling portion 634, as shown. Theinner contact 1103 may be in electrical contact with theouter contact 1102. For example, theinner contact 1103 may be in physical contact with theouter contact 1102. In the illustrated embodiment and in functionally similar embodiments, theinner contact 1103 may maintain electrical contact with theouter contact 1102 as therotary drive shaft 630 and/or theend effector 560 rotates. For example, theouter contact 1102 may be a figure of revolution such that theinner contact 1103 is in physical contact with thecontact 1102 as therotary drive shaft 630 rotates. - In the illustrated embodiment and in functionally similar embodiments, the
inner contact 1103 may also be a figure of revolution. For example, as illustrated, theinner contact 1103 may comprise a ringedbrush 1104 and agrooved conductor 1106. Thegrooved conductor 1106 may be positioned around therotary drive shaft 630 proximal from thehex coupling portion 634. Thegrooved conductor 1106 may define agroove 1107 to receive the ringedbrush 1104. The ringedbrush 1104 may have a diameter larger than that of thegroove 1107. In the illustrated embodiment and in functionally similar embodiments, the ringedbrush 1104 may define aslot 1105. For example, theslot 1105 may allow the diameter of the ringedbrush 1104 to expand and contract. For example, the diameter of the ringedbrush 1104 may be expanded in order to place it over the remainder of thegrooved conductor 1106 and into theslot 1107. Also, when theinner contact 1103 is placed within theouter contact 1102, its diameter may be contracted. In this way, the tendency of the ringedbrush 1104 to resume its original diameter may cause the ringedbrush 1104 to exert an outward force on theouter contact 1102 tending to keep the ringedbrush 1104 andouter contact 1102 in physical and electrical contact with one another. - The
inner contact 1103 may be in electrical communication with a suitable shaft component, thus completing the current path from theelectrode 1112 to a generator, such as thegenerator 3002 described herein above with respect toFIG. 6 and/or an internal generator. In the illustrated embodiment, theinner contact 1103, and particularly thegrooved conductor 1106, is in physical and electrical contact with acoiled wire component 1114 wrapped around therotary drive shaft 630. The coiledwire component 1114 may extend proximally through the shaft where it may be coupled directly or indirectly to the generator. As described herein, the coiledwire component 1114 may also act as a spring to provide rigidity to therotary drive shaft 630 around an articulation joint, for example, as described herein with respect toFIGS. 31-31 andspring 3612. In some embodiments, therotary drive shaft 630 may comprise an outer insulated sleeve. Theinner contact 1103 may be in electrical contact with the outer insulated sleeve in addition to or instead of the coiledwire component 1114. An example insulatedsleeve 1166 is described herein with respect toFIG. 151 . Another example of a potential insulated sleeve is the constrainingmember 3660 described herein above with respect toFIG. 45 . - In the illustrated embodiment, the a current return path from the
electrode 1112 may be provided by various components of theend effector 550 andshaft assembly 560 including, for example, thejaw members effector drive housing 608 and other shaft members extending proximally. Accordingly, portions of the energized current path may be electrically isolated from other components of theend effector 550 andshaft assembly 560. For example, as described above, thelead 1110 between theouter contact 1102 andelectrode 1112 may be surrounded by anelectrical insulator 1111, as shown. Also, theouter contact 1102 andinner contact 1103 may be isolated from other components of theend effector 550 andshaft assembly 560. For example, aninsulator 1118 may be positioned to electrically isolate theouter contact 1102 from the endeffector drive housing 608. Aninsulator 1116 may be positioned to isolate theouter contact 1102 andinner contact 1103 from therotary drive shaft 630. Theinsulator 1118 may be an additional component or, in some embodiments, may be provided as a TEFLON or other insulating coating. As illustrated inFIGS. 145-146 , theinsulator 1116 may extend proximally, also isolating the coiledwire component 1114 from both therotary drive shaft 630 and from other components of theshaft assembly 560 such as, for example, the endeffector drive housing 608. - In the embodiment illustrated in
FIGS. 145-146 , theouter contact 1102 may be extended proximally and distally such that electrical contact between theouter contact 1102 andinner contact 1103 is maintained with therotary drive shaft 630 androtary drive head 632 in different proximal and distal positions. For example, inFIG. 145 , therotary drive shaft 630 androtary drive head 632 are pulled proximally such that the malehex coupling portion 636 of thedrive shaft head 632 is received by hexshaft coupling portion 609 of the endeffector drive housing 608. In this position, rotation of therotary drive shaft 630 may cause rotation of the endeffector drive housing 608 andend effector 550, as described herein. Additionally, as illustrated inFIG. 145 , theinner contact 1103 may be in physical and electrical contact with theouter contact 1102. InFIG. 146 , therotary drive shaft 630 androtary drive head 632 are pushed distally such that thehex coupling portion 634 of therotary drive head 632 receives the threadedrotary drive nut 606. In this position, rotation of therotary drive shaft 630 may cause rotation of the threadedrotary drive nut 606 that, in turn, causes rotation of the threadedrotary drive member 604 and distal and/or proximal translation of the I-beam member 620. Additionally, as illustrated inFIG. 146 , theinner contact 1103 may be in physical and electrical contact with theouter contact 1102. -
FIGS. 147-148 are cross-sectional views of one embodiment of theend effector 550 andshaft assembly 560 where a longitudinal length of theouter contact 1108 is selected such that therotary connector assembly 1100 alternately creates and breaks an electrical connection limited by the longitudinal position of theinner contact 1103. For example, inFIG. 147 , therotary drive shaft 630 androtary drive head 632 are positioned proximally such that the malehex coupling portion 636 is received into the hexshaft coupling portion 609 of thedistal shaft portion 608. As illustrated, the inner contact 1103 (and specifically the ring brush 1104) may contact not thecontact 1102, but instead may contact theinsulator 1108. In this way, there may not be a completed electrical connection between theelectrode 1112 and the generator when therotary drive shaft 630 androtary drive head 632 are in the proximal position shown inFIG. 147 . When therotary drive shaft 630 androtary drive head 632 are positioned distally to contact the threadeddrive nut 606, as illustrated inFIG. 148 , theinner contact 1103 may be in electrical (and physical) contact with thecontact 1102, completing the current path between theelectrode 1112 and generator. The configuration illustrated inFIGS. 147-148 may be useful in various different contexts. For example, it may be undesirable to energize theelectrode 1112 when thejaw members jaw members rotary drive shaft 630 when theshaft 630 is positioned distally (FIG. 148 ) and not when theshaft 630 is positioned proximally (FIG. 147 ). Accordingly, in the configuration ofFIGS. 147-148 , the current path from the generator to theelectrode 1112 is complete only when therotary drive shaft 630 androtary drive head 632 are positioned distally. - In some of the embodiments described herein, the
end effector 550 may be removable from the endeffector drive housing 608 and, for example, may be interchangeable with other end effectors (not shown). Examples of mechanisms for implementing interchangeable electrodes are provided herein with respect toFIGS. 106-115 . In such implementations, thelead 1110 may comprise an end effector portion and a shaft portion connected by a connector assembly.FIGS. 149-150 illustrate one embodiment of theend effector 550 andshaft assembly 560 showing a configuration including thelead portions 1130, 1132 andconnector assembly 1120. For example, as illustrated inFIGS. 149-150 and as described herein, aproximal portion 603 of thejaw member 602B may be received within the endeffector drive housing 608. Theproximal portion 603 of thejaw member 602B is illustrated within the endeffector drive housing 608 inFIG. 149 and separated from the endeffector drive housing 608 inFIG. 150 . Theconnector assembly 1120 may comprise an end effector side-lead 1122 and a shaft-side lead 1124. The respective leads may be brought into physical and electrical contact with one another when theproximal portion 603 is received into thedistal shaft portion 608, as illustrated inFIG. 149 . In various embodiments, theconnector assembly 1120 may be configured so as to maintain electrical isolation of the energized current path from other components of theend effector 550 andshaft 560. For example,insulation insulation leads insulation leads -
FIG. 151 illustrates a cross-sectional view of an alternate embodiment of anend effector 1140 andshaft assembly 1142 showing another context in which arotary connector assembly 1147 may utilized. Theend effector 1140 may comprisejaw members jaw members jaw members beam member 1156 that, in the illustrated embodiment, may comprise acutting edge 1148 for severing tissue between thejaw members beam member 1156 may be driven distally and proximally by rotation of a threaded I-beam member shaft 1154. The I-beam member shaft 1154 may be rotated via amain drive shaft 1149. For example, themain drive shaft 1149 may be coupled to agear 1150. Thegear 1150 may be in mechanical communication with agear 1152 coupled to the I-beam member shaft 1154 as illustrated. - The
end effector 1140 may comprise anelectrode 1158 that may operate in a manner similar to that ofelectrode 1112, etc., described herein above. Aninsulated lead 1160 may be electrically coupled to theelectrode 1158 and may extend proximally to anouter contact 1162. Theouter contact 1162 may be positioned on an inner wall of ashaft member 1141 in a manner similar to that in which thecontact 1102 is coupled to theinner wall 1108 of the endeffector drive housing 608. A inner contact 1164 (e.g., brush) may be positioned around themain drive shaft 1149 such that thebrush 1164 is in electrical contact with thecontact 1162. Thebrush 1164 may also be in electrical contact with aconductive sleeve 1166 positioned around themain drive shaft 1149. Thesleeve 1166 may be electrically isolated from themain drive shaft 1149 and from the remainder of theshaft 1142, for example, byinsulators - It will be appreciated that the
rotary electrode assembly 1100 may be utilized with any of the end effector and/or shaft assembly embodiments described herein. For example,FIG. 152 illustrates a cross-sectional view of one embodiment of the end effector and shaft assembly ofFIGS. 83-91 illustrating another example installation of arotary electrode assembly 1100 including theouter contact 1102 andinner contact 1103 as described herein. -
FIGS. 153-168 illustrate various embodiments of anelectrosurgical end effector 700 comprising a proximaltissue treatment zone 706 and a distaltissue treatment zone 708. The proximaltissue treatment zone 706 utilizes various electrodes and cutting edges to treat tissue, for example, as described herein above with respect to endeffector 3000 shown inFIGS. 6-10 . Treatment provided by the proximaltissue treatment zone 706 may include, for example, clamping, grasping, transsection, coagulation, welding, etc. The distaltissue treatment zone 708 may also comprise one ormore electrodes 742 and may be utilized to apply treatment to tissue and, in some embodiments, to perform other surgical tasks such as grasping and manipulating suturing needles and/or other surgical implements. -
FIG. 153 illustrates one embodiment of theend effector 700. Theend effector 700 may be utilized with various surgical tools including those described herein. As illustrated, theend effector 700 comprises afirst jaw member 720 and asecond jaw member 710. Thefirst jaw member 720 may be movable relative to thesecond jaw member 1004 between open positions (shown inFIGS. 153-156 ) and closed positions (shown inFIGS. 166 and 165 ). For example, thejaw members pivot point 702. Thejaw members jaw members jaw members FIGS. 6-8 . In use, theend effector 700 may be transitioned from an open position to a closed position to capture tissue between thejaw members jaw members jaw members - The proximal
tissue treatment zone 706 of theend effector 700 may treat tissue in a manner similar to that described above with respect to theend effector 3000. Tissue between thejaw members teeth FIGS. 154-159 . In the proximaltissue treatment zone 706, thejaw members longitudinal channels FIGS. 155 and 159 ) may traverse distally and proximally within thelongitudinal channels end effector 3000 and axiallymovable member 3016. In some embodiments, distal and proximal translation of the I-beam member 820 may also transition thejaw members beam member 820 may comprise flanges positioned to contact cam surfaces of therespective jaw members flanges FIGS. 6-10 . The I-beam member 820 may also define a distally directed cuttingelement 822 that may transect tissue between thejaw members beam member 820 advances distally. In some embodiments, thejaw members surfaces surfaces FIGS. 132-137 . - The proximal
tissue treatment zone 706 may additionally comprise various electrodes and/or current paths for providing electrosurgical (RF) and/or other energy to tissue. Thesecond jaw member 710 may comprise asupply electrode 848 positioned around thechannel 810. See e.g.,FIGS. 153-155 and 157. Thesupply electrode 848 may be in electrical communication with a generator for providing RF energy, such as thegenerator 3002 described herein above. For example, thesupply electrode 848 may be coupled to one or more supply connector leads 846. The supply connector leads 846 may extend distally through a shaft assembly to atool interface 302 and/or handle 2500 and ultimately to a generator, such as thegenerator 3002 or an internal generator, as described herein. Thesupply electrode 848 may be electrically insulated from other elements of theend effector 700. For example, referring toFIG. 10 , the supply electrode (indicated on either side of thechannel 810 by 848 a and 848 b) may be positioned on an insulating layer 844 (again indicated on either side of thechannel 810 by 844 a, 844 b). The insulatinglayer 844 may be made of any suitable insulating material, such as ceramic, TEFLON, etc. In some embodiments, the insulatinglayer 844 may be applied as a coating to thejaw member 810. Thesupply electrode 848 may operate in conjunction with a return path to apply bipolar RF energy to tissue, such astissue 762 shown inFIG. 159 . Current provided via thesupply electrode 848 may flow through thetissue 762 and return to the generator via the return path. The return path may comprise various electrically conducting components of theend effector 700. For example, in some embodiments, the return path may comprise bodies of the first andsecond jaws beam member 820, the tissue-contactingsurfaces - In the illustrated embodiments, the
supply electrode 848 is offset from the return path. For example, thesupply electrode 848 is positioned such that when thejaw members FIG. 159 , theelectrode 848 is not in electrical contact (e.g., physical contact) with conductive portions of theend effector 700 that may serve and a return path for RF current. For example, thefirst jaw member 720 may comprise an opposing member 878 (indicated inFIG. 159 as 878 a and 878 b on either side of the channel 812) positioned opposite theelectrode 848 such that upon closure of thejaw members electrode 848 is in direct contact with the opposingmember 878 and not with any other portions of theend effector 700. The opposingmember 878 may be electrically insulating. In this way, it may be possible to close thejaw members supply electrode 848 to the return path. In some embodiments, the opposingmember 878 may be selectively insulating. For example, the opposingmember 878 may comprise a positive temperature coefficient (PTC) body, as described above, that is conductive below a temperature threshold (e.g., about 100° C.) and insulating at higher temperatures. In this way, the opposingmember 878 may form part of the return path, but only until its temperature exceeds the temperature threshold. For example, if thesupply electrode 848 were to be electrically shorted to an opposingmember 878 comprising PTC or a similar material, the short would quickly drive the temperature of the opposingmember 878 about the threshold, thus relieving the short. - The distal
tissue treatment zone 708 may define distal graspingsurfaces jaw members grasping surfaces proximally treatment zone 706. The distalgrasping surfaces surfaces grip elements 741 for increasing friction between the graspingsurfaces grip elements 741 may comprise any suitable texture defined by thesurfaces surfaces - In some embodiments, the distal
tissue treatment zone 708 may also be configured to apply monopolar and/or bipolar electrosurgical (e.g., RF) energy. For example, thesurface 790 a may be and/or comprise adistal supply electrode 742. For example, thesurface 790 a itself may be made from a conductive material and therefore be thedistal supply electrode 742. In some embodiments, as described herein, theconductive electrode 742 may comprise a conductive material coupled to an insulatinglayer 845. The insulatinglayer 845 may be a dielectric layer and/or a coating applied to thejaw member 710. Thedistal supply electrode 742 may be in electrical contact with a generator, such as thegenerator 3002 described herein above and/or an internal generator. In some embodiments, thedistal supply electrode 742 may be in electrical contact with thesupply electrode 848 of the proximaltissue treatment zone 706. In this way, thedistal supply electrode 742 may be energized when theproximal supply electrode 848 is energized. In some embodiments, thedistal supply electrode 742 may be energized independent of theproximal supply electrode 848. For example, thedistal supply electrode 742 may be coupled to the generator via a dedicated supply line (not shown). - A return path for electrical energy provided by the
distal supply electrode 742 may also comprise any suitable conductive portion of the end effector including, for example, thejaw member 710, thejaw member 720, the I-beam member 820, etc. In some embodiments, the distalgrasping surface 790 b may also form adistal return electrode 748 that may be part of the return path from thedistal supply electrode 742. For example, thedistal return electrode 748 may be in electrical contact with thejaw member 720 that may, in turn, be in electrical contact with a generator such as thegenerator 3000. Thedistal return electrode 748 may be formed in any suitable manner. For example, thesurface 790 b may be conductive, thus forming theelectrode 748. In some embodiments, a conductive material may be applied to thesurface 790 b, where the conductive material makes up theelectrode 748. - In the illustrated embodiments, the
distal supply electrode 742 is not offset. For example, thedistal supply electrode 742 is aligned with thereturn electrode 748. Accordingly, theend effector 700 may be configured such that thedistal supply electrode 742 does not come into contact with thereturn electrode 748 when thejaw members gap 780 may exist between thedistal supply electrode 742 and thedistal return electrode 748 when thejaw members gap 780 is visible inFIGS. 160 , 161, 162, 163, 164 and 165. - In various embodiments, the
gap 780 may be generated as a result of the dimensions (e.g., thickness) of various components of the proximaltissue treatment zone 706. For example, when the opposingmember 878 and theproximal supply electrode 848 may extend towards the axis LT such that when theelectrode 848 andmember 878 are in physical contact with one another (e.g., when thejaw members surfaces 790 a,b are not in physical contact with one another. Any suitable combination of the opposingmember 878, thesupply electrode 848 and the insulatinglayer 844 may be utilized to bring about this result. - Referring now to
FIGS. 160 , 163 and 164, the insulatinglayer 844 and the insulatinglayer 845 may be continuous (e.g., form a continuous insulating layer). Similarly, theproximal supply electrode 848 anddistal supply electrode 742 may be continuous (form a continuous electrode). The opposingmember 878 is also illustrated. As illustrated, the electrode 848 (e.g., the portion of the continuous electrode in the proximal zone 706) is thicker than theelectrode 742. Accordingly, when theelectrode 848 contacts the opposingmember 878, the thickness of theelectrode 848 may prevent the distal graspingsurfaces 790 a,b from contacting one another, thus forming thegap 780.FIG. 161 illustrates an alternative embodiment of theend effector 700 where theelectrode 742 and theelectrode 848 are of the same thickness. The thickness of the opposingmember 878, however, is selected such that when theelectrode 848 contacts the opposingmember 878, the distal graspingsurfaces 790 a,b do not contact one another, forming thegap 780.FIG. 162 illustrates another embodiment where the insulatinglayer 844 is thicker than the insulatinglayer 845, thus preventing contact between the distal graspingsurfaces 790 a, b and forming thegap 780. - In some embodiments, the
distal supply electrode 742 may extend distally to a portion of adistal edge 886 of thejaw member 710. For example,FIG. 153 shows adistal electrode portion 744. Thedistal electrode portion 744 may be utilized by a clinician to apply electrosurgical energy to tissue that is not necessarily between thejaw members distal electrode portion 744 may be utilized to provide bipolar and/or monopolar cauterization. In bi-polar embodiments, thedistal electrode portion 744 may utilize a return path similar to the return paths described herein. In some embodiments, the respective jaw members may comprise external depressions and/orprotrusions FIGS. 116-131 . The depressions and/orprotrusions distal electrode portion 744. In some embodiments where thedistal electrode portion 744 is present, the insulatinglayer 845 may extend distally under the distal electrode portion, as shown inFIG. 164 . - It will be appreciated that the length of the respective
tissue treatment zones FIG. 165 shows an embodiment where the distaltissue treatment zone 708 is relatively shorter than thezone 708 shown in the other figures. For example, inFIG. 165 , the distaltissue treatment zone 708 extends proximally by a lesser distance from the distal tip of theend effector 700 than thezones 708 illustrated elsewhere. - In some embodiments, the distal
tissue treatment zone 708 may be utilized as a general surgical grasper. For example, the distal graspingsurfaces 790 a,b may be utilized to grasp and manipulate tissue. Also, in some embodiments, the distal graspingsurfaces 790 a,b, may be utilized to grasp and manipulate artificial surgical implements such as needles, clips, staples, etc. For example,FIGS. 160 , 161, 162 and 163 show a surgical implement 896 secured between the distal graspingsurfaces 790 a, b. InFIGS. 160 , 161 and 162 the surgical implement 896 has a round cross-section (e.g., a suturing needle). InFIG. 163 , the surgical implement 896 has a non-round cross-section (e.g., a trailing end of a suturing needle, a clip, etc.). When used as a grasper, thedistal treatment zone 708 may or may not apply electrosurgical energy to objects between the tissue surfaces 790 a,b. For example, it may not be desirable to apply electrosurgical energy to a needle or other surgical implement. - It will be appreciated that, as described above, some components of the proximal
tissue treatment zone 706 may be common and/or continuous with some components of the distaltissue treatment zone 708. For example,FIG. 167 illustrates one embodiment of thejaw member 710 with theelectrodes layers layers continuous layer 899. A distal portion of thecontinuous layer 899 may make up the insulatinglayer 845 while a proximal portion of the insulatinglayer 899 may make up the insulatinglayer 844. The insulatinglayer 844, as illustrated, defines anotch 897 corresponding to thechannel 810, as shown, such that the I-beam member 820 may traverse thechannel 810 without contacting thecontinuous layer 899. Also, as illustrated, the insulatinglayer 845 defines adistal portion 843 that extends over a part of thedistal end 886 of thejaw member 710. Thedistal portion 843, for example, may be positioned under thedistal electrode portion 744. -
FIG. 166 illustrates an embodiment of thejaw member 710, as illustrated inFIG. 167 , with theelectrodes regions Regions channel 810.Region 850 c is positioned distal from a distal-most portion of thechannel 810.FIG. 168 illustrates an alternate embodiment where thethird region 850 c is omitted. Accordingly, first andsecond regions electrode 848 extend distally to thedistal supply electrode 742. - In various embodiments, a surgical instrument can comprise an end effector and a shaft assembly coupled proximal to the end effector. The end effector comprises a first jaw member, a second jaw member, and a closure mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The shaft assembly comprises an articulation joint configured to independently articulate the end effector in a vertical direction and a horizontal direction. The surgical instrument also comprises at least one active electrode disposed on at least one of the first jaw member and the second jaw member. The at least one active electrode is configured to deliver RF energy to tissue located between the first jaw member and the second jaw member when in the closed position.
- In various embodiments, a surgical instrument can comprise an end effector and a shaft assembly coupled proximal to the end effector. The end effector comprises a first jaw member, a second jaw member, and a closure mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The shaft assembly comprises a head rotation joint configured to independently rotate the end effector. The surgical instrument also comprises at least one active electrode disposed on at least one of the first jaw member and the second jaw member. The at least one active electrode is configured to deliver RF energy to tissue located between the first jaw member and the second jaw member when in the closed position.
- A surgical tool can comprise an end effector, comprising a first jaw member, a second jaw member and a closure mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The surgical tool further comprises a shaft assembly proximal to the surgical end effector, wherein the surgical end effector is configured to rotate relative to the shaft assembly, and a rotary drive shaft configured to transmit rotary motions. The rotary drive shaft is selectively movable axially between a first position and a second position relative to the shaft assembly, wherein the rotary drive shaft is configured to apply the rotary motions to the closure mechanism when in the first axial position, and wherein the rotary drive shaft is configured to apply the rotary motions to the end effector when in the second axial position. In addition, the closure mechanism of the surgical tool comprises an I-beam member configured to translate in an axial direction to cam the first jaw member toward to the second jaw member. The I-beam member is connected to a threaded rotary drive member coupled to a rotary drive nut, wherein the rotary drive shaft is configured to engage with the rotary drive nut to transmit rotary motions to the rotary drive nut. Rotary motions of the rotary drive nut actuate translation of the threaded rotary drive member and the I-beam in the axial direction. Furthermore, the first jaw member and the second jaw member comprise channels configured to slidably engage with the I-beam member, wherein rotary motions of the rotary drive nut actuate translation of the I-beam in the channels between a proximally refracted position and a distally advanced position.
- A surgical tool can comprise an end effector, comprising a first jaw member, a second jaw member, and a first actuation mechanism configured to move the first jaw member relative to the second jaw member between an open position and a closed position. The surgical tool further comprises a shaft assembly proximal to the surgical end effector, and a rotary drive shaft configured to transmit rotary motions. The rotary drive shaft is selectively moveable between a first position and a second position relative to the shaft assembly, wherein the rotary drive shaft is configured to engage and selectively transmit the rotary motions to the first actuation mechanism when in the first position, and wherein the rotary drive shaft is configured to disengage from the actuation mechanism when in the second position. In addition, the first actuation mechanism comprises an I-beam member configured to translate in an axial direction to cam the first jaw member toward to the second jaw member, the I-beam member connected to a threaded rotary drive member coupled to a rotary drive nut, wherein the rotary drive shaft is configured to engage with the rotary drive nut to transmit rotary motions to the rotary drive nut, and wherein rotary motions of the rotary drive nut actuate translation of the threaded rotary drive member and the I-beam in the axial direction. Furthermore, the first jaw member and the second jaw member comprise channels configured to slidably engage with the I-beam member, and wherein rotary motions of the rotary drive nut actuate translation of the I-beam in the channels between a proximally retracted position and a distally advanced position.
- A surgical tool can comprise an end effector comprising a first jaw member, and a second jaw member, wherein the first jaw member is movable relative to the second jaw member between an open position and a closed position. The surgical tool also comprises first and second actuation mechanisms, and a clutch member configured to selectively engage and transmit rotary motion to either the first or the second actuation mechanism. In addition, the first actuation mechanism comprises an I-beam member configured to translate in an axial direction to cam the first jaw member toward the second jaw member, the I-beam member connected to a threaded rotary drive member coupled to a rotary drive nut, wherein the clutch member is configured to engage with the rotary drive nut to transmit rotary motions to the rotary drive nut, and wherein rotary motions of the rotary drive nut actuates translation of the threaded rotary drive member and the I-beam in the axial direction. Furthermore, the first jaw member and the second jaw member comprise channels configured to slidably engage with the I-beam member, and wherein rotary motions of the rotary drive nut actuate translation of the I-beam in the channels between a proximally retracted position and a distally advanced position.
- A surgical tool can comprise an interchangeable end effector, a handle assembly and a shaft assembly. The interchangeable end effector comprises a first jaw member including a first electrode and a second jaw member including a second electrode. The first jaw member is moveable relative to the second jaw member between a first position and a second position. The handle assembly is proximal to said surgical end effector. The shaft assembly extends between the handle assembly and the interchangeable end effector. The shaft assembly comprises a rotary drive shaft configured to transmit rotary motions. The rotary drive shaft is selectively axially moveable relative to the shaft assembly between a plurality of discrete positions. A coupling arrangement can releasably attach the interchangeable end effector to the shaft assembly.
- A surgical tool can comprise an interchangeable end and a shaft assembly. The interchangeable end may comprise a first jaw member including a first electrode, a second jaw member including a second electrode, a closure mechanism configured to move the first jaw member relative to the second jaw member between a first position and a second position, and an actuation driver configured to drive the closure mechanism. The shaft assembly extends proximal to the interchangeable end effector and comprises a rotary drive shaft configured to transmit rotary motions to the actuation driver. A coupling arrangement can releasably attach the interchangeable end effector to the shaft assembly.
- A surgical tool can comprise, an interchangeable end effector and a shaft assembly. The end effector comprises a first jaw member including a first electrode, a second jaw member including a second electrode, a closure mechanism configured to move the first jaw member relative to the second jaw member between a first position and a second position, and an actuation driver configured to drive the closure mechanism. The shaft assembly extends proximal to the interchangeable end effector and comprises a rotary drive shaft configured to transmit rotary motions. The interchangeable end effector is releasably attached to the shaft assembly. The rotary drive shaft is selectively extendable axially to operably engage and transmit the rotary motions to the actuation driver.
- A surgical end effector can comprise a first jaw member and a second jaw member. The first jaw member defines an exterior surface on a distal portion thereof. The second jaw member defines an exterior surface on a distal portion thereof. The first jaw member is moveable relative to the second jaw member between a first position and a second position. At least one of the exterior surfaces of the first and second jaw members includes a tissue gripping portion.
- A surgical tool can comprise a surgical end effector, a handle assembly and a drive shaft. The surgical end effector comprises a first jaw member defining an exterior surface on a distal portion thereof and a second jaw member defining an exterior surface on a distal portion thereof. The first jaw member is moveable relative to the second jaw member between a first position and a second position. At least one of the exterior surfaces of the first and second jaw members includes a tissue gripping portion. The handle assembly is proximal to said surgical end effector. The drive shaft extends between said surgical end effector and said handle assembly and is configured to move the first jaw relative to the second jaw between the first position and the second position in response to actuation motions in the handle.
- A surgical tool can comprise an actuation system, a surgical end effector and a shaft assembly. The actuation system is for selectively generating a plurality of control motions. The surgical end effector is operably coupled to said actuation system and comprises a first jaw member and a second jaw member. The first jaw member defines an exterior surface on a distal portion thereof. The second jaw member defines an exterior surface on a distal portion thereof. The first jaw member is movably supported relative to the second jaw member between an open position and a closed position in response to closure motions generated by said actuation system. At least one of the exterior surfaces of the first and second jaw members includes a tissue adhering portion. The shaft assembly is for transmitting said plurality of control motions to the surgical end effector.
- An end effector can comprise a first jaw member and a second jaw member. The first jaw member is movable relative to the second jaw member between an open position and a closed position. The first jaw member comprises a first positively-angled tissue-contacting surface. The second jaw member comprises a second positively-angled tissue-contacting surface. At least one of the first jaw member and the second jaw member comprises at least one active electrode disposed on the jaw member adjacent to the positively-angled tissue-contacting surface. The at least one active electrode is configured to deliver RF energy to tissue located between the first jaw member and the second jaw member when in the closed position.
- An end effector can comprise a first jaw member and a second jaw member. The first jaw member is movable relative to the second jaw member between an open position and a closed position. The first jaw member comprises a first positively-angled tissue-contacting surface and a first negatively-angled tissue-contacting surface. The second jaw member comprises a second positively-angled tissue-contacting surface and a second negatively-angled tissue-contacting surface. The first positively-angled tissue-contacting surface opposes the second negatively-angled tissue-contacting surface when the first and second jaw members are in the closed position. The first negatively-angled tissue-contacting surface opposes the second positively-angled tissue-contacting surface when the first and second jaw members are in the closed position.
- An end effector can comprise a first jaw member and a second jaw member. The first jaw member is movable relative to the second jaw member between an open position and a closed position. The first jaw member comprises a first proximal tissue-contacting portion, a first distal textured portion adjacent to the first proximal tissue-contacting portion, a first positively-angled tissue-contacting surface disposed along the first proximal tissue-contacting portion, and at least one first electrode located in the first proximal tissue-contacting portion adjacent to the first positively-angled tissue-contacting surface. The second jaw member comprises a second proximal tissue-contacting portion, a second distal textured portion adjacent to the second proximal tissue-contacting portion, a second positively-angled tissue-contacting surface disposed along the second proximal tissue-contacting portion, and at least one second electrode located in the second proximal tissue-contacting portion adjacent to the second positively-angled tissue-contacting surface. The at least one first electrode and the at least one second electrode are in a bipolar configuration to deliver RF energy to tissue located between the first jaw member and the second jaw member when in the closed position.
- A surgical tool can comprise an end effector. The end effector can comprise first and second jaw members, a shaft assembly, a rotatable drive shaft, a first electrical contact and a second electrical contact. The first and second jaw members are pivotable relative to one another from an open position to a closed position. An electrode is positioned on the first jaw member. The shaft assembly extends proximally from the end effector, is at least partially hollow, and defines an inner wall. The rotatable drive shaft extends proximally within the shaft assembly. The first electrical contact is coupled to the inner wall of the shaft assembly and positioned around at least a portion of the drive shaft. The second electrical contact is coupled to and rotatable with the drive shaft. The second electrical contact is positioned to be electrically connected to the first electrical contact as the drive shaft rotates.
- A surgical end effector for use with a surgical tool can comprise a first jaw member and a second jaw member. The second jaw member is pivotable relative to the first jaw member from a first open position to a closed position, where the first and second jaw members are substantially parallel in the closed position. The second jaw member comprises an offset proximal supply electrode and a distal supply electrode. The offset proximal supply electrode is positioned to contact an opposing member of the first jaw member when the first and second jaw members are in the closed position. The distal supply electrode is positioned distal of the offset proximal electrode and is aligned with a conductive surface of the first jaw member when the first and second jaw members are in the closed position. When the first and second jaw members are in the closed position, the proximal supply electrode is in contact with the opposing member and the distal supply electrode is not in contact with the conductive surface of the first jaw member.
- A surgical end effector for use with a surgical tool can comprise first and second jaw members pivotable from a first open position to a closed position. The first and second jaw members define a proximal tissue treatment region and distal tissue treatment region. The second jaw member comprises, in the proximal tissue treatment region, an offset proximal supply electrode positioned such that when the jaw members are in the closed position the proximal supply electrode is in physical contact with the first jaw member and is not in electrical contact with the first jaw member. The second jaw member further comprises, in the distal tissue treatment region, a distal supply electrode positioned such that when the jaw members are in the closed position, the distal supply electrode is aligned with a conductive surface of the first jaw member. When the jaw members are in the closed position, the jaw members define a physical gap between the distal supply electrode and the conductive surface of the first jaw member.
- The devices disclosed herein can be designed to be disposed of after a single use, or they can be designed to be used multiple times. In either case, however, the device can be reconditioned for reuse after at least one use. Reconditioning can include any combination of the steps of disassembly of the device, followed by cleaning or replacement of particular pieces, and subsequent reassembly. In particular, the device can be disassembled, and any number of the particular pieces or parts of the device can be selectively replaced or removed in any combination. Upon cleaning and/or replacement of particular parts, the device can be reassembled for subsequent use either at a reconditioning facility, or by a surgical team immediately prior to a surgical procedure. Those skilled in the art will appreciate that reconditioning of a device can utilize a variety of techniques for disassembly, cleaning/replacement, and reassembly. Use of such techniques, and the resulting reconditioned device, are all within the scope of the present application.
- Although the present invention has been described herein in connection with certain disclosed example embodiments, many modifications and variations to those example embodiments may be implemented. For example, different types of end effectors may be employed. Also, where materials are disclosed for certain components, other materials may be used. The foregoing description and following claims are intended to cover all such modification and variations.
- Any patent, publication, or other disclosure material, in whole or in part, that is said to be incorporated by reference herein is incorporated herein only to the extent that the incorporated materials does not conflict with existing definitions, statements, or other disclosure material set forth in this disclosure. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material.
Claims (20)
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2013
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EP3574855B1 (en) | 2021-05-26 |
BR112014032738B1 (en) | 2021-09-28 |
RU2644274C2 (en) | 2018-02-08 |
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JP6279567B2 (en) | 2018-02-14 |
US20170196637A1 (en) | 2017-07-13 |
CN104582601B (en) | 2018-05-11 |
WO2014004236A1 (en) | 2014-01-03 |
CN104582600B (en) | 2018-04-13 |
EP2866693B1 (en) | 2019-07-24 |
US11007004B2 (en) | 2021-05-18 |
CN104582600A (en) | 2015-04-29 |
EP2866694A1 (en) | 2015-05-06 |
US20140005708A1 (en) | 2014-01-02 |
BR112014032754A2 (en) | 2017-06-27 |
JP2015525611A (en) | 2015-09-07 |
RU2643402C2 (en) | 2018-02-01 |
EP3888571B1 (en) | 2024-02-07 |
RU2015102539A (en) | 2016-08-20 |
EP3888571A1 (en) | 2021-10-06 |
BR112014032738A2 (en) | 2017-06-27 |
EP3574855A1 (en) | 2019-12-04 |
CN104582601A (en) | 2015-04-29 |
RU2015102669A (en) | 2016-08-20 |
US9204879B2 (en) | 2015-12-08 |
WO2014004235A1 (en) | 2014-01-03 |
JP2015527902A (en) | 2015-09-24 |
JP6266609B2 (en) | 2018-01-24 |
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