CA2185147A1 - Laparoscopic stapler with overload sensor and interlock - Google Patents
Laparoscopic stapler with overload sensor and interlockInfo
- Publication number
- CA2185147A1 CA2185147A1 CA002185147A CA2185147A CA2185147A1 CA 2185147 A1 CA2185147 A1 CA 2185147A1 CA 002185147 A CA002185147 A CA 002185147A CA 2185147 A CA2185147 A CA 2185147A CA 2185147 A1 CA2185147 A1 CA 2185147A1
- Authority
- CA
- Canada
- Prior art keywords
- linkage
- jaws
- trigger
- interlock
- normal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
Abstract
A surgical stapler (20) with an overload sensor and lockout is disclosed. The surgical stapler (2) is particularly useful in laparoscopic surgical procedures.
Description
LAPAROSCOPIC STAPLER WITH
OVERLOAD SENSOR AND INTERLOCK
BACKGROUND
This invention relates to laparoscopic staplers, and in particular to an overload sensor and lockout for laparoscopic staplers.
Lap~uscopic surgical techniques have greatly reduced the trauma and risks associated with certain surgeries, and have e,~pedited patient recovery and reduced sc~rring. However, laparoscopic surgical techniques also present many c~ nges to the surgeon. The ~urgeon must pe~ d~lic~te procedures with a limited view of the surgical site. The surgeon is sepa,~led from the surgical field, and cannot always rely on the sense of touch. one area that can be particularly challenging is in the use of laparoscopic staplers. These staplers typically include jaws which gather or approximate the tissues to be stapled, and a staple forming apparatus which forms a staple in the tissues approximated in the jaws. An example of such a stapler is disclosed in Green et al., U.S. PatentNo. 5,040,715. In using laparoscopic staplers, the surgeon does not have an ideal, three iim~n~ional view of the tissues being stapled as co,llpa,ed to some open surgical techniques, and receives only limited tactile feeclbac~ of the tissues being appr~imated in the jaws by the operation of the instrument. Thus, it is possible for the s.l~eon to occasionally gather excessive tissue between the jaws of the stapler. If there is excessive tissue between the jaws, there is a risk that the stapler could be damaged, or that if a staple is placed it will not be propelly formed or will not adequately hold the tissue. Thus, the ~ulgeon must proceed slowly and deliberately to ~nticir~te the potential for approximating an excess quantity of tissue between the jaws of the stapler.
BRIEF DESCRIPTION OF THE INVENTION
The present invention relates to a laparoscopic stapler with an overload sensor that intell upls the operation of the jaws and/or prevents the placement of a staple if more than a predetermined amount of tissue has been WO 95t29639 PCT/US95/04847 approximated between the jaws. This overload sensor allows the surgeon to proceed faster with the stapling operation, since the surgeon does not have to rely solely on the limited visual and tactile feeclb~ck available.
Generally the laparoscopic stapler of this invention comprises jaws 5 which close together to approximate the tissues to be stapled and a linkage operable to close the jaws. At least a portion of the linkage is movable, in response to a load between the jaws, out of its normal operating position so that normal operation of the linkage is intellupted. A spring resili~ntly biases the movable portion of the linkage to its normal operating position, and holds the lo movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined appr~liate amount of tissue.
However the spring allows the movable portion of the linkage to move from its normal opeldting position as the linkage closes the jaws on more than the predetermined ap~ropliate amount of tissue so that normal operation of the 15 linkage will be interrupted.
In the ~lefelled embodiment, the laparoscopic stapler also includes an interlock that prevents a staple from being formed when there is more than a predetermined amount of tissue between the jaws. The preferred embodiment of the laparoscopic stapler comprises jaws which close together to approximate the 20 tissues to be stapled, and a linkage operable to close the jaws. The stapler also includes a staple forming appaldl~ls and a trigger for actu~ting the staple forming app~d~us to form a staple in the tissues approxim~ted in the jaws. At least a portion of the linkage is movable, in response to a load between the jaws, out of its normal operating position so that normal operation of the linkage is 25 intellu~led. A spring resiliently biases the movable portion of the linkage to its normal operating position, and holds the movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined al)propliate amount of tissue. However, the spring allows the movable portion of the linkage to move from its normal operating position as the30 linkage closes the jaws on more than the predetermined apl)ro~liate amount oftissue so that normal operation of the linkage will be interrupted. An interlock, releasable upon the normal operation of the linkage, engages the trigger and prevents the ~ctll~tion of the staple forming apparatus until released.
Thus, the laparoscopic stapler of the present invention helps to reduce the chance that the surgeon will close the jaws on an inappropliate amount 5 of tissue, and in the prefell~d embodiment reduces the chance that the surgeonwill attempt to place a staple in an inapprop,iate amount of tissue. This reduces the risk of improper staple formation or p~ ernçnt, and reduces the risk of damage to the stapling equipment. These and other features and advantages will be in part appaltnt, and in part pointed out hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a longitudinal cross-sectional view of the proximal end of a laparoscopic stapler constructed according to the principles of this invention, with the linkage in the normal operating position with the jaws open;
Figure 2 is a longitu-lin~l cross-sectional view of the proximal end of the laparoscopic stapler, with the linkage in the normal opelating position with the jaws closed;
Figure 3 is a longitudinal cross-sectional view of the proximal end of the la~aroscopic stapler, with the linkage out of its normal operating position as would occur from an overload between the jaws;
Figure 4 is a side elevation view of the distal end of the stapler with the jaws open, collesponding to the handle position of Figure l; and Figure 5 is a side elevation view of the distal end of the stapler with the jaws closed, collesponding to the handle position of Figure 2.
2s Corresponding reference numerals indicate corresponding parts throughout the drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The proximal end of laparoscopic stapler with overload sensor constructed according to the principles of this invention is in~ ted generally as 20 in Fig. 1.
The end of the stapler comprises a housing 22, including a finger ring 24 for the 21~5147 user to grasp the stapler. The stapler has a pair of jaws 2 and 4 (see Figures 4and 5) which gather or approximate the tissues to be stapled. The jaws 2 and 4 are shown in their open position in Figure 4, cGll~sponding to the handle position shown in Figure 1. The jaws 2 and 4 are shown in their closed position 5 in Figure 5, corresponding to the handle position shown in Figure 2. The stapler also includes a staple forming apparatus which forms a staple in the tissues approximated in the jaws 2 and 4. For example, the stapler may include the staple forming apparatus and/or other features of the staplers disclosed in commonly ~signed U.S. Patent Application No. 08/236,379, filed on May 2, 1994.
The stapler also includes a linkage 26 operable to close the jaws 2 and 4. The linkage preferably includes member 28, and links 30 and 32. The distal end of the link 30 is pivotally connected to the member 28 with forward toggle pin 34. The proximal end of the link 30 and the distal end of the link 3215 are pivotally connected with a center toggle pin 36. The proximal end of the link 32 is pivotally connectçd to base 38 with rear toggle pin 40. Operation of the linkage by the movement of the center toggle pin inwardly toward the housing 22 causes the jaws 2 and 4 to close.
According to the principles of this invention, a portion of the linkage 26 20 is preferably movable in response to a load between the jaws 2 and 4. In thisprefe,led embodiment, the base 38, which pivotally supports the proximal end of the link 32, is slidable inside the housing 22. A support 42, having a longiturlin~lly extending slot 44 therein, is provided inside the housing 22. The base 38 has a pin 46 that is received in the slot 44 in the support 42 to limit the 25 proximal and distal movement of the base 38. When the linkage 26 is in its normal operating position, the links 30 and 32 can move inwardly until the center toggle pin 36 connecting the links engages the normal stop 48. This occurs when the base 38 is in its distal-most position as shown in Figures 1 and 2. However,when the linkage 26 is not in its normal operating position, the links 30 and 3230 can only move inwardly until the pin engages the stop 50. This occurs when the base 28 slides proximally, which allows the proximal end of the link 32 to slide--4--proximally. The stop 50 interferes with the operation of the linkage 26.
Moreover, the proximal movement of the proximal end of the link 32 reduces the net amount of distal movement of the distal end of the link 30, thereby reducingthe amount the jaws 2 and 4 are closed.
s Thus, when the linkage 26 remains in its normal O~ldtiilg position, the linkage operates as shown in Fig. 2, and closes the jaws 2 and 4, as shown in Figure S. However, when the linkage 26 moves from its normal o~.dling position, the stop 50 interferes with the operation of the linkage, intel~upling the linkage as shown in Fig. 3, and preventing the jaws 2 and 4 from lo completely closing.
The stapler also comprises a spring 52 that extends between an anchor 54 on the housing 22, and an anchor 56 on the base 38. The spring 52 resiliently biases the linkage 26 to its normal operating position, by resilit ntly biasing the base 38 distally. The spring 52 is sized to hold the linkage 26 in its normal Op~ldtillg position as the linkage 26 closes the jaws 2 and 4 on no more than a predetermined appropliate amount of tissue. However, the spring 52 is also sized to allow a portion of the linkage 26 to move from its normal opeld~ing position as the linkage 26 closes the jaws 2 and 4 on more than the predetermined appr~liate amount of tissue so that normal operation of the linkage 26 is interrupted.
The stapler preferably includes a trigger 60 for ~h~ting the staple forming app~dlus to form a staple in the tissues approximated in the jaws 2 and 4. The trigger is conne~ted by a trigger shaft 62 to the staple forming app~lus.The trigger 60 is operated distally relative to the housing 22 to actuate the staple forming device.
An interlock 64, releasable upon the normal operation of the linkage 26, engages the trigger 60 and prevents the ~rt-~tion of the staple forming appa d~us until the interlock 64 is released. The interlock 64 is preferably pivotally mounted in the housing for movement between a locked position in which the interlock 64 engages the trigger 60, and an unlocked position in which the interlock 64 is spaced from the trigger 60. A portion of the interlock 64 is exposed through a window 66 in the housing 22.
In this preferred embodiment, the stapler also includes a handle or grip 68, pivotally mounted to the housing 22. The grip includes an arcuate slot s 70 which receive the center toggle pin 36, so that the pivoting of the grip 68toward the housing 22 operates the linkage 26 to cause the jaws 2 and 4 to close.
The grip 68 also has a tang 72, that is adapted to fit through the window 66 in the housing 22, and releasably hold the grip against the housing 22 to hold the jaws 2 and 4 closed. The tang 72 has a notch 74 to engage the marginal edge of the window 66. The tang 72 projects sufficiently through the window 60 in the housing 22 to pivot the interlock 64. When the linkage 26 operates normally, thegrip 68 can pivot to a position against the housing 22 so that the tang 72 pivots the interlock 64 to release it from the trigger 60. However, when the linkage 26does not operate normally, as occurs when there is too much tissue between the 15 jaws 2 and 4, the linkage 26 prevents the grip 68 from pivoting against the housing 22, and thus prevents the tang 72 from extending sufficiently through the window 66 to pivot the interlock 64, thereby leaving the trigger 60 locked. The grip 68 can be released from its locked position against the housing 22 by sliding knob 76, which causes the notch 74 or tang 72 to di~çng~ge from the window 66.
OPERATION
The operation of the stapler is readily understood. The opeldtor manipulates the stapler into position, and closes the jaws 2 and 4 by squeezing the grip 68 to operate the linkage 26. If there is no more than a predetermined 2s amount of tissue between the jaws 2 and 4, the linkage 26 will operate normally, with the links 30 and 32 pivoting until the center toggle pin 36 abuts the stop 48.
The tang 72 on the grip 68 extends through the window 66 to engage the margins of the window 66, thereby locking the jaws 2 and 4. The tang 72 also pivots the interlock 64 to its unlocked position so that the operator can move the trigger 60 30 forward to actuate the staple forming al)pald~.ls. See Fig. 2.
If there is more than the predetermined amount of tissue between the jaws 2 and 4, then the force caused by the attempt to close the jaws 2 and 4causes the base 38 to slide proximally against the force of the spring 52, bringing the linkage 26 out of its normal operating position. The links 30 and 32 pivot S until the center toggle pin 36 abuts the stop 52. In this position, the jaws 2 and 4 are not fully closed, re~uçing the overloading of the stapler. Furthermore, the grip 68 cannot pivot sufficiently close to the housing for the tang 72 to penetrate sl~ffi~ien~ly through the window 66 to release the interlock 64. Thus, the trigger 60 is locked from actuating the staple former, reducing the risk of a malformed o or il..plo~lly placed staple.
Thus, the laparoscopic stapler of the present invention helps to reduce overloading of the stapler and reduces the risk of malformed or iml)l~elly placed staples.
OVERLOAD SENSOR AND INTERLOCK
BACKGROUND
This invention relates to laparoscopic staplers, and in particular to an overload sensor and lockout for laparoscopic staplers.
Lap~uscopic surgical techniques have greatly reduced the trauma and risks associated with certain surgeries, and have e,~pedited patient recovery and reduced sc~rring. However, laparoscopic surgical techniques also present many c~ nges to the surgeon. The ~urgeon must pe~ d~lic~te procedures with a limited view of the surgical site. The surgeon is sepa,~led from the surgical field, and cannot always rely on the sense of touch. one area that can be particularly challenging is in the use of laparoscopic staplers. These staplers typically include jaws which gather or approximate the tissues to be stapled, and a staple forming apparatus which forms a staple in the tissues approximated in the jaws. An example of such a stapler is disclosed in Green et al., U.S. PatentNo. 5,040,715. In using laparoscopic staplers, the surgeon does not have an ideal, three iim~n~ional view of the tissues being stapled as co,llpa,ed to some open surgical techniques, and receives only limited tactile feeclbac~ of the tissues being appr~imated in the jaws by the operation of the instrument. Thus, it is possible for the s.l~eon to occasionally gather excessive tissue between the jaws of the stapler. If there is excessive tissue between the jaws, there is a risk that the stapler could be damaged, or that if a staple is placed it will not be propelly formed or will not adequately hold the tissue. Thus, the ~ulgeon must proceed slowly and deliberately to ~nticir~te the potential for approximating an excess quantity of tissue between the jaws of the stapler.
BRIEF DESCRIPTION OF THE INVENTION
The present invention relates to a laparoscopic stapler with an overload sensor that intell upls the operation of the jaws and/or prevents the placement of a staple if more than a predetermined amount of tissue has been WO 95t29639 PCT/US95/04847 approximated between the jaws. This overload sensor allows the surgeon to proceed faster with the stapling operation, since the surgeon does not have to rely solely on the limited visual and tactile feeclb~ck available.
Generally the laparoscopic stapler of this invention comprises jaws 5 which close together to approximate the tissues to be stapled and a linkage operable to close the jaws. At least a portion of the linkage is movable, in response to a load between the jaws, out of its normal operating position so that normal operation of the linkage is intellupted. A spring resili~ntly biases the movable portion of the linkage to its normal operating position, and holds the lo movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined appr~liate amount of tissue.
However the spring allows the movable portion of the linkage to move from its normal opeldting position as the linkage closes the jaws on more than the predetermined ap~ropliate amount of tissue so that normal operation of the 15 linkage will be interrupted.
In the ~lefelled embodiment, the laparoscopic stapler also includes an interlock that prevents a staple from being formed when there is more than a predetermined amount of tissue between the jaws. The preferred embodiment of the laparoscopic stapler comprises jaws which close together to approximate the 20 tissues to be stapled, and a linkage operable to close the jaws. The stapler also includes a staple forming appaldl~ls and a trigger for actu~ting the staple forming app~d~us to form a staple in the tissues approxim~ted in the jaws. At least a portion of the linkage is movable, in response to a load between the jaws, out of its normal operating position so that normal operation of the linkage is 25 intellu~led. A spring resiliently biases the movable portion of the linkage to its normal operating position, and holds the movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined al)propliate amount of tissue. However, the spring allows the movable portion of the linkage to move from its normal operating position as the30 linkage closes the jaws on more than the predetermined apl)ro~liate amount oftissue so that normal operation of the linkage will be interrupted. An interlock, releasable upon the normal operation of the linkage, engages the trigger and prevents the ~ctll~tion of the staple forming apparatus until released.
Thus, the laparoscopic stapler of the present invention helps to reduce the chance that the surgeon will close the jaws on an inappropliate amount 5 of tissue, and in the prefell~d embodiment reduces the chance that the surgeonwill attempt to place a staple in an inapprop,iate amount of tissue. This reduces the risk of improper staple formation or p~ ernçnt, and reduces the risk of damage to the stapling equipment. These and other features and advantages will be in part appaltnt, and in part pointed out hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a longitudinal cross-sectional view of the proximal end of a laparoscopic stapler constructed according to the principles of this invention, with the linkage in the normal operating position with the jaws open;
Figure 2 is a longitu-lin~l cross-sectional view of the proximal end of the laparoscopic stapler, with the linkage in the normal opelating position with the jaws closed;
Figure 3 is a longitudinal cross-sectional view of the proximal end of the la~aroscopic stapler, with the linkage out of its normal operating position as would occur from an overload between the jaws;
Figure 4 is a side elevation view of the distal end of the stapler with the jaws open, collesponding to the handle position of Figure l; and Figure 5 is a side elevation view of the distal end of the stapler with the jaws closed, collesponding to the handle position of Figure 2.
2s Corresponding reference numerals indicate corresponding parts throughout the drawings.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The proximal end of laparoscopic stapler with overload sensor constructed according to the principles of this invention is in~ ted generally as 20 in Fig. 1.
The end of the stapler comprises a housing 22, including a finger ring 24 for the 21~5147 user to grasp the stapler. The stapler has a pair of jaws 2 and 4 (see Figures 4and 5) which gather or approximate the tissues to be stapled. The jaws 2 and 4 are shown in their open position in Figure 4, cGll~sponding to the handle position shown in Figure 1. The jaws 2 and 4 are shown in their closed position 5 in Figure 5, corresponding to the handle position shown in Figure 2. The stapler also includes a staple forming apparatus which forms a staple in the tissues approximated in the jaws 2 and 4. For example, the stapler may include the staple forming apparatus and/or other features of the staplers disclosed in commonly ~signed U.S. Patent Application No. 08/236,379, filed on May 2, 1994.
The stapler also includes a linkage 26 operable to close the jaws 2 and 4. The linkage preferably includes member 28, and links 30 and 32. The distal end of the link 30 is pivotally connected to the member 28 with forward toggle pin 34. The proximal end of the link 30 and the distal end of the link 3215 are pivotally connected with a center toggle pin 36. The proximal end of the link 32 is pivotally connectçd to base 38 with rear toggle pin 40. Operation of the linkage by the movement of the center toggle pin inwardly toward the housing 22 causes the jaws 2 and 4 to close.
According to the principles of this invention, a portion of the linkage 26 20 is preferably movable in response to a load between the jaws 2 and 4. In thisprefe,led embodiment, the base 38, which pivotally supports the proximal end of the link 32, is slidable inside the housing 22. A support 42, having a longiturlin~lly extending slot 44 therein, is provided inside the housing 22. The base 38 has a pin 46 that is received in the slot 44 in the support 42 to limit the 25 proximal and distal movement of the base 38. When the linkage 26 is in its normal operating position, the links 30 and 32 can move inwardly until the center toggle pin 36 connecting the links engages the normal stop 48. This occurs when the base 38 is in its distal-most position as shown in Figures 1 and 2. However,when the linkage 26 is not in its normal operating position, the links 30 and 3230 can only move inwardly until the pin engages the stop 50. This occurs when the base 28 slides proximally, which allows the proximal end of the link 32 to slide--4--proximally. The stop 50 interferes with the operation of the linkage 26.
Moreover, the proximal movement of the proximal end of the link 32 reduces the net amount of distal movement of the distal end of the link 30, thereby reducingthe amount the jaws 2 and 4 are closed.
s Thus, when the linkage 26 remains in its normal O~ldtiilg position, the linkage operates as shown in Fig. 2, and closes the jaws 2 and 4, as shown in Figure S. However, when the linkage 26 moves from its normal o~.dling position, the stop 50 interferes with the operation of the linkage, intel~upling the linkage as shown in Fig. 3, and preventing the jaws 2 and 4 from lo completely closing.
The stapler also comprises a spring 52 that extends between an anchor 54 on the housing 22, and an anchor 56 on the base 38. The spring 52 resiliently biases the linkage 26 to its normal operating position, by resilit ntly biasing the base 38 distally. The spring 52 is sized to hold the linkage 26 in its normal Op~ldtillg position as the linkage 26 closes the jaws 2 and 4 on no more than a predetermined appropliate amount of tissue. However, the spring 52 is also sized to allow a portion of the linkage 26 to move from its normal opeld~ing position as the linkage 26 closes the jaws 2 and 4 on more than the predetermined appr~liate amount of tissue so that normal operation of the linkage 26 is interrupted.
The stapler preferably includes a trigger 60 for ~h~ting the staple forming app~dlus to form a staple in the tissues approximated in the jaws 2 and 4. The trigger is conne~ted by a trigger shaft 62 to the staple forming app~lus.The trigger 60 is operated distally relative to the housing 22 to actuate the staple forming device.
An interlock 64, releasable upon the normal operation of the linkage 26, engages the trigger 60 and prevents the ~rt-~tion of the staple forming appa d~us until the interlock 64 is released. The interlock 64 is preferably pivotally mounted in the housing for movement between a locked position in which the interlock 64 engages the trigger 60, and an unlocked position in which the interlock 64 is spaced from the trigger 60. A portion of the interlock 64 is exposed through a window 66 in the housing 22.
In this preferred embodiment, the stapler also includes a handle or grip 68, pivotally mounted to the housing 22. The grip includes an arcuate slot s 70 which receive the center toggle pin 36, so that the pivoting of the grip 68toward the housing 22 operates the linkage 26 to cause the jaws 2 and 4 to close.
The grip 68 also has a tang 72, that is adapted to fit through the window 66 in the housing 22, and releasably hold the grip against the housing 22 to hold the jaws 2 and 4 closed. The tang 72 has a notch 74 to engage the marginal edge of the window 66. The tang 72 projects sufficiently through the window 60 in the housing 22 to pivot the interlock 64. When the linkage 26 operates normally, thegrip 68 can pivot to a position against the housing 22 so that the tang 72 pivots the interlock 64 to release it from the trigger 60. However, when the linkage 26does not operate normally, as occurs when there is too much tissue between the 15 jaws 2 and 4, the linkage 26 prevents the grip 68 from pivoting against the housing 22, and thus prevents the tang 72 from extending sufficiently through the window 66 to pivot the interlock 64, thereby leaving the trigger 60 locked. The grip 68 can be released from its locked position against the housing 22 by sliding knob 76, which causes the notch 74 or tang 72 to di~çng~ge from the window 66.
OPERATION
The operation of the stapler is readily understood. The opeldtor manipulates the stapler into position, and closes the jaws 2 and 4 by squeezing the grip 68 to operate the linkage 26. If there is no more than a predetermined 2s amount of tissue between the jaws 2 and 4, the linkage 26 will operate normally, with the links 30 and 32 pivoting until the center toggle pin 36 abuts the stop 48.
The tang 72 on the grip 68 extends through the window 66 to engage the margins of the window 66, thereby locking the jaws 2 and 4. The tang 72 also pivots the interlock 64 to its unlocked position so that the operator can move the trigger 60 30 forward to actuate the staple forming al)pald~.ls. See Fig. 2.
If there is more than the predetermined amount of tissue between the jaws 2 and 4, then the force caused by the attempt to close the jaws 2 and 4causes the base 38 to slide proximally against the force of the spring 52, bringing the linkage 26 out of its normal operating position. The links 30 and 32 pivot S until the center toggle pin 36 abuts the stop 52. In this position, the jaws 2 and 4 are not fully closed, re~uçing the overloading of the stapler. Furthermore, the grip 68 cannot pivot sufficiently close to the housing for the tang 72 to penetrate sl~ffi~ien~ly through the window 66 to release the interlock 64. Thus, the trigger 60 is locked from actuating the staple former, reducing the risk of a malformed o or il..plo~lly placed staple.
Thus, the laparoscopic stapler of the present invention helps to reduce overloading of the stapler and reduces the risk of malformed or iml)l~elly placed staples.
Claims (10)
1. An improved endoscopic stapler apparatus having jaws which close together to approximate the tissues to be stapled and a linkage operable to close the jaws, the improvement comprising a portion of the linkage being movable, in response to a load between the jaws, out of its normal operating position so that normal operation of the linkage is interrupted, and a spring resiliently biasing the movable portion of the linkage to its normal operating position and holding the movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the movable portion of the linkage tomove from its normal operating position as the linkage closes the jaws on more than the predetermined appropriate amount of tissue so that normal operation of the linkage is interrupted.
2. An improved endoscopic stapler apparatus having jaws which close together to approximate the tissues to be stapled, a linkage operable to close the jaws, a staple forming apparatus, and a trigger for actuating the staple forming apparatus to form a staple in the tissues approximated in the jaws; the improvement comprising a portion of the linkage being movable, in response to a load between the jaws, out of its normal operation position so that normal operation of the linkage is interrupted; a spring resiliently biasing the movable portion of the linkage to its normal operating position and holding the movable portion of the linkage in its normal operating position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the movable portion of the linkage to move from its normal operating position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that normal operation of the linkage is interrupted; and an interlock, releasable upon the normal operation of the linkage, that engages the trigger and prevents the actuation of the staple forming apparatus until the interlock is released.
3. An endoscopic stapler apparatus, the apparatus comprising:
jaws which close together to approximate the tissues to be stapled;
a linkage operable to close the jaws, the linkage having at least one movable pivot point, movable into a normal load position in which the linkage can operate completely to close the jaws, and out of the normal load position inwhich the linkage cannot operate completely to close the jaws;
a handle for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal position, the spring holding the pivot point in its normal position as the linkage closes the jaws on a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal position as the linkage closes the jaws on more than a predetermined appropriate amount of tissue.
jaws which close together to approximate the tissues to be stapled;
a linkage operable to close the jaws, the linkage having at least one movable pivot point, movable into a normal load position in which the linkage can operate completely to close the jaws, and out of the normal load position inwhich the linkage cannot operate completely to close the jaws;
a handle for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal position, the spring holding the pivot point in its normal position as the linkage closes the jaws on a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal position as the linkage closes the jaws on more than a predetermined appropriate amount of tissue.
4. An endoscopic stapler apparatus, the apparatus comprising:
jaws which close together to approximate the tissues to be stapled;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted.
jaws which close together to approximate the tissues to be stapled;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted.
5. The endoscopic stapler apparatus according to claim 4 further comprising a staple forming apparatus, a trigger for actuating the staple forming apparatus to form a staple in the tissue approximated in the jaw, and an interlock for engaging the trigger and preventing the trigger from actuating the staple forming apparatus; and wherein the grip disengages the interlock from the trigger if the linkage operates completely, but does not disengage the interlock from the trigger if the operation of the linkage is interrupted, thereby preventing the trigger from operating when there is more than the predetermined appropriate amount of tissue between the jaws.
6. The endoscopic stapler according to claim 5 wherein the grip is pivotally mounted, and the pivoting of the grip operates the linkage.
7. An endoscopic stapler apparatus, the apparatus comprising:
jaws which close together to approximate the tissues to be stapled;
a staple forming apparatus;
a trigger for actuating the staple forming apparatus to form a staple in the tissues approximated in the jaws;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted;
an interlock for engaging the trigger and preventing the trigger from actuating the staple forming apparatus, the interlock being disengaged from the trigger upon the uninterrupted operation of the linkage to allow the staple forming apparatus to be actuated, but preventing the actuation of the staple forming apparatus of the operation of the linkage is interrupted.
jaws which close together to approximate the tissues to be stapled;
a staple forming apparatus;
a trigger for actuating the staple forming apparatus to form a staple in the tissues approximated in the jaws;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip for operating the linkage to close the jaws; and a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted;
an interlock for engaging the trigger and preventing the trigger from actuating the staple forming apparatus, the interlock being disengaged from the trigger upon the uninterrupted operation of the linkage to allow the staple forming apparatus to be actuated, but preventing the actuation of the staple forming apparatus of the operation of the linkage is interrupted.
8. The endoscopic stapler apparatus according to claim 7 further comprising a grip operating the linkage to close the jaws, the movement of the grip being interrupted if the operation of the linkage is interrupted, the grip disengaging the interlock from the trigger when the operation of the linkage is not interrupted, but leaving the interlock engaged to the trigger when the operation of the linkage is interrupted.
9. The endoscopic stapler apparatus according to claim 8 wherein the interlock is pivotable between a locked position in which the interlock engages the trigger, and an unlocked position in which the interlock does not engage thetrigger, and where the grip pivots the interlock from its locked position to itsunlocked position when the operation of the linkage is uninterrupted.
10. An endoscopic stapler apparatus, the apparatus comprising:
jaws which close together to approximate the tissues to be stapled;
a staple forming apparatus;
a trigger for actuating the staple forming apparatus to form a staple in the tissues approximated in the jaws;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip mounted the stapler apparatus for pivotal movement to operate the linkage to close the jaws, the pivoting movement of the grip being interrupted by an interruption in the operation of the linkage;
a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted;
an interlock for engaging the trigger and preventing the trigger from actuating the staple forming apparatus, the interlock being pivotable between a locked position in which the interlock engages the trigger, and an unlocked position in which the interlock does not engage the trigger, the grip pivoting the interlock to its unlocked position when the operation of the linkage is uninterrupted.
jaws which close together to approximate the tissues to be stapled;
a staple forming apparatus;
a trigger for actuating the staple forming apparatus to form a staple in the tissues approximated in the jaws;
a linkage operable to close the jaws, the linkage having at least one movable pivot point having a normal load position in which the linkage operates uninterrupted to close the jaws, and being movable out of the normal load position in which the operation of the linkage is interrupted;
a grip mounted the stapler apparatus for pivotal movement to operate the linkage to close the jaws, the pivoting movement of the grip being interrupted by an interruption in the operation of the linkage;
a spring resiliently biasing the movable pivot point to its normal load position, the spring holding the movable pivot point in its normal load position as the linkage closes the jaws on no more than a predetermined appropriate amount of tissue, but allowing the pivot point to move from its normal load position asthe linkage closes the jaws on more than the predetermined appropriate amount of tissue so that operation of the linkage is interrupted;
an interlock for engaging the trigger and preventing the trigger from actuating the staple forming apparatus, the interlock being pivotable between a locked position in which the interlock engages the trigger, and an unlocked position in which the interlock does not engage the trigger, the grip pivoting the interlock to its unlocked position when the operation of the linkage is uninterrupted.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US08/237,004 | 1994-05-02 | ||
US08/237,004 US5470007A (en) | 1994-05-02 | 1994-05-02 | Laparoscopic stapler with overload sensor and interlock |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2185147A1 true CA2185147A1 (en) | 1995-11-09 |
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ID=22891940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA002185147A Abandoned CA2185147A1 (en) | 1994-05-02 | 1995-04-20 | Laparoscopic stapler with overload sensor and interlock |
Country Status (6)
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US (2) | US5470007A (en) |
EP (1) | EP0749287B1 (en) |
AU (1) | AU2295395A (en) |
CA (1) | CA2185147A1 (en) |
DE (1) | DE69532111T2 (en) |
WO (1) | WO1995029639A1 (en) |
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CA2099100C (en) * | 1992-06-30 | 2005-02-22 | David T. Green | Apparatus for applying surgical fasteners |
CA2103507C (en) * | 1992-09-23 | 1998-09-15 | David A. Nicholas | Locking mechanism for endoscopic or laparoscopic surgical instruments |
US5485952A (en) * | 1992-09-23 | 1996-01-23 | United States Surgical Corporation | Apparatus for applying surgical fasteners |
US5439468A (en) * | 1993-05-07 | 1995-08-08 | Ethicon Endo-Surgery | Surgical clip applier |
US5470007A (en) * | 1994-05-02 | 1995-11-28 | Minnesota Mining And Manufacturing Company | Laparoscopic stapler with overload sensor and interlock |
-
1994
- 1994-05-02 US US08/237,004 patent/US5470007A/en not_active Expired - Lifetime
-
1995
- 1995-04-20 DE DE69532111T patent/DE69532111T2/en not_active Expired - Lifetime
- 1995-04-20 WO PCT/US1995/004847 patent/WO1995029639A1/en active IP Right Grant
- 1995-04-20 EP EP95916459A patent/EP0749287B1/en not_active Expired - Lifetime
- 1995-04-20 AU AU22953/95A patent/AU2295395A/en not_active Abandoned
- 1995-04-20 CA CA002185147A patent/CA2185147A1/en not_active Abandoned
- 1995-11-27 US US08/565,631 patent/US5630539A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0749287B1 (en) | 2003-11-12 |
US5470007A (en) | 1995-11-28 |
AU2295395A (en) | 1995-11-29 |
EP0749287A1 (en) | 1996-12-27 |
DE69532111D1 (en) | 2003-12-18 |
DE69532111T2 (en) | 2004-08-26 |
US5630539A (en) | 1997-05-20 |
WO1995029639A1 (en) | 1995-11-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued | ||
FZDE | Discontinued |
Effective date: 19990420 |