WO2005112793A1 - Snap-lock for drill sleeve - Google Patents
Snap-lock for drill sleeve Download PDFInfo
- Publication number
- WO2005112793A1 WO2005112793A1 PCT/US2005/017394 US2005017394W WO2005112793A1 WO 2005112793 A1 WO2005112793 A1 WO 2005112793A1 US 2005017394 W US2005017394 W US 2005017394W WO 2005112793 A1 WO2005112793 A1 WO 2005112793A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sleeve
- bone
- drill
- bore
- protrusion
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1725—Guides or aligning means for drills, mills, pins or wires for applying transverse screws or pins through intramedullary nails or pins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1728—Guides or aligning means for drills, mills, pins or wires for holes for bone plates or plate screws
-
- 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
- A61B90/90—Identification means for patients or instruments, e.g. tags
-
- 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
- A61B90/90—Identification means for patients or instruments, e.g. tags
- A61B90/94—Identification means for patients or instruments, e.g. tags coded with symbols, e.g. text
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/17—Guides or aligning means for drills, mills, pins or wires
- A61B17/1735—Guides or aligning means for drills, mills, pins or wires for rasps or chisels
-
- 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
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/062—Measuring instruments not otherwise provided for penetration depth
-
- 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
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0801—Prevention of accidental cutting or pricking
- A61B2090/08021—Prevention of accidental cutting or pricking of the patient or his organs
-
- 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
- A61B90/90—Identification means for patients or instruments, e.g. tags
- A61B90/92—Identification means for patients or instruments, e.g. tags coded with colour
Definitions
- the present invention is related to a drill sleeve system. More particularly, the invention is related to a snap lock design for provisionally retaining a drill sleeve to a screw insertion sleeve.
- Orthopedic fixation devices such as plates are frequently coupled to bone with fasteners inserted through holes in the device.
- fractures may be treated by inserting an elongated member into a channel reamed in the intramedullary canal.
- This elongated member or "intramedullary nail” as it is known in the art, may provide stability to the bone until the fractured bone segments heal together.
- Intramedullary nails may be fastened to the bone in which they reside using screws inserted through pre-formed holes in the nail. Corresponding holes may be drilled in the adjacent bone to allow easier insertion of the screws in the bone.
- holes can be formed with the aid of a drill guide aligned with the targeted screw hole.
- a drill may be introduced through the drill guide is thus guided through the screw hole to drill a hole in the bone underlying the screw hole.
- the drilling and screw insertion process can be performed percutaneously.
- an incision may be made in the skin overlying the bone, and a trocar may be inserted into the incision and used to separate the soft tissue to create an initial passage
- a drill may be inserted through the drill sleeve and used to form a" hblelri the b ⁇ rie''a's ⁇ eN ⁇ U ' siy' ' described.
- a screw insertion sleeve may thereafter be inserted through the passage and used to facilitate engagement of the screw with the screw hole and bone.
- these three pieces may be provided as a single unit to facilitate handling and use by the surgeon.
- the three pieces may be nested within each other and inserted as a single unit.
- At least two of the pieces may be provided with features aimed at preventing separation of the individual pieces while they are being handled by the user.
- snap rings, ball detents, or threads may be used to secure the pieces together.
- the user may pull the pieces apart (in the case of a snap-ring or ball-detent) or may unthread the pieces (where threaded pieces are provided).
- Snap-ring locking devices may be difficult to sterilize, and threaded pieces may be difficult to handle in the surgical environment.
- An orthopedic system comprising a first sleeve member having an outer surface and an inner surface defining a longitudinal bore and a surface; and a second sleeve member having an outer surface and an inner
- the second sleeve member may further be configured to be at least partly received within the bore of the first sleeve
- first and second sleeves may be bbhfi ju etftd' r ⁇ fi ⁇ ive-te- irfll tiirtherethrough to drill a hole in bone.
- one of the first and second sleeve members may further comprise a protrusion and the other may comprise a corresponding recess, the protrusion and recess being co- operable to provisionally axially lock the first and second sleeve members together when the second sleeve member is at least partly received within the bore of the first sleeve member.
- the second sleeve may be dis-engageable from the first sleeve through the application of an axial separation force between the first and second sleeves and a radial compression force to at least a portion of the second sleeve.
- the system may also comprising a trocar configured to be received within the longitudinal bore of the second sleeve.
- the first and second sleeve members further may each have a proximal end comprising a flange member and a distal end comprising a tapered tip region.
- the longitudinal bore of the first sleeve may further be configured to receive a driver and bone fastener therethrough to allow insertion of the fastener into bone in a direction along the longitudinal axis of the bore.
- the tapered tip of at least one of the first or second sleeve members configured to align with a fastener hole in a bone fixation element.
- the bone fixation element may be a bone plate or an intramedullary nail.
- the protrusion may be integrally formed with the associated sleeve, and in one embodiment may comprise at least one circumferential ridge.
- the recess may comprise at least one circumferential groove corresponding to the at least one ridge.
- the protrusion further may comprise first and second tapered surfaces.
- the second sleeve may comprise at least one longitudinal slot disposed between the inner and outer surfaces of the sleeve, the slot running from at ⁇ eas ⁇ rW 'erild f the" sfe v ⁇ ' a>hd having a length, the slot further configured to render at least a portion of the sleeve radially flexible.
- the at least one slot may divide a first end of the sleeve into first and second halves, wherein pressing the first and second halves toward each other may disengage the ridge from the recess, thereby allowing the first and second sleeves to be axially engaged with, or disengaged from, each other.
- the second sleeve may have two longitudinal slots diametrically disposed with respect to each other about the circumference of the sleeve.
- the protrusion may comprise at least one tapered surface configured to facilitate radial compression of the second sleeve when the sleeve is inserted into the bore of the first sleeve.
- the first and second sleeves and the trocar may be color coded to provide a visual indication of the size of a bone screw that can be received through the bore of the first sleeve.
- the outer surface of the first sleeve may be configured to be received within the bore of an aiming arm of an intramedullary nail to align the sleeve with a targeted fastener hole in a portion of the intramedullary nail.
- An orthopedic system comprising a first sleeve having proximal and distal ends, a longitudinal axis and inner and outer surfaces.
- a second sleeve may be provided having proximal and distal ends, a longitudinal axis, and inner and outer surfaces, where the inner surface is configured to receive at least a portion of the first sleeve.
- the inner surface may further be configured to receive a bone fastener and driver for inserting the fastener into the hole drilled in bone.
- the inner surface of at least one of the first and second sleeves may be configured to receive a drill bit for drilling a hole in bone.
- At least a' p rtibrWt ⁇ ie first slee ' may be slidably receivable within at least a portion of the second sleeve.
- One of the second sleeve inner surface and the first sleeve outer surface may comprise a projection, and the other may comprise a corresponding recess so that when the first sleeve is received within the second sleeve, the projection and recess may cooperate to releasably axially engage the first sleeve with the second sleeve.
- the projection may be integrally formed with the associated sleeve.
- the protrusion may also comprise at least one circumferential ridge, or a plurality of discrete protruding elements.
- the recess may comprise at least one circumferential groove corresponding to the at least one ridge.
- the protrusion may comprise first and second tapered surfaces configured to engage a portion of the inner surface of the second sleeve.
- the sleeves may be disengageable from each other by applying an axial separation force between the first and second sleeves and a radial compression force to at least a portion of the first sleeve.
- the system may further comprise a trocar configured to be received within the longitudinal bore of the first sleeve.
- the sleeves further may each have a proximal end comprising a flange member and a distal end comprising a tapered tip region.
- the tapered tip of at least one of the first or second sleeves may be configured to align with a fastener hole in a bone fixation element.
- the bone fixation element may be a bone plate or an intramedullary nail.
- the first sleeve may comprise at least one longitudinal slot disposed between the inner and outer surfaces of the sleeve, the slot running from at least
- the slot further configured to render at least a portion of the sleeve radially flexible.
- the at least one slot may divide a first end 'of the" firsYs eeve Info frrst'a id second halves, wherein when the first sleeve is fully received within the second sleeve, pressing the first and second halves toward each other disengages the ridge from the recess, thereby allowing the first sleeve to be removed from the second sleeve.
- the first tapered surface may cooperate with the inner surface of the second sleeve to radially compress the first and second halves together.
- the first sleeve may have two longitudinal slots diametrically disposed with respect to each other about the circumference of the sleeve.
- the protrusion may comprise at least one tapered surface configured to facilitate radial compression of the first sleeve when the sleeve is inserted into the bore of the second sleeve.
- the first and second sleeves and the trocar may be color coded to provide a visual indication of the size of a bone screw that can be received through the bore of the first sleeve.
- the outer surface of the first sleeve may be configured to be received within the bore of an aiming arm of an intramedullary nail to align the sleeve with a targeted fastener hole in a portion of the intramedullary nail.
- a method of drilling a hole in bone comprising: (a) providing a drill sleeve and protection sleeve combination, the drill sleeve telescopically receivable within at least a portion of the protection sleeve, the drill sleeve having an inner surface for receiving a drill bit for drilling a hole in a bone, the drill sleeve having an outer surface comprising one of a projection and a recess configured to engage a corresponding recess or projection disposed on an inner surface of the protection sleeve to provisionally axially lock the sleeves together; wherein the drill and protection sleeve are separable from each other through the
- the drill sleeve and protection sleeve further may comprise a trocar configured to be received within the longitudinal bore of the drill sleeve.
- the sleeves further each have a proximal end comprising a flange member and a distal end comprising a tapered tip region.
- the bone fixation element may be a bone plate or an intramedullary nail.
- the projection may be integrally formed with the associated sleeve.
- the projection may comprise a plurality of discrete protruding elements.
- the projection may comprise at least one circumferential ridge.
- the recess may comprise at least one circumferential groove corresponding to the at least one ridge.
- the protrusion may comprise first and second tapered surfaces configured to engage a portion of the recess.
- the drill sleeve may comprise at least one longitudinal slot disposed between the inner and outer surfaces of the sleeve, the slot running from at least one end of the sleeve and having a length, the slot further configured to render at least a portion of the sleeve radially flexible, the at least one slot may divide a first end of the drill sleeve into first and second halves so that when the drill sleeve is fully received within the screw insertion sleeve, pressing the first and lecorid 'halVe'y'fJbward'each'bth'er may disengage the protrusion from the recess, thereby allowing the drill sleeve to be removed from the screw insertion sleeve.
- the method may comprise the additional steps of: (g) inserting a bone fastener and screwdriver through the protections sleeve; and (h) driving the bone fastener into the hole in the bone to fix the bone fixation element to the bone. [0028] The method may further comprising the step, between steps (a) and
- step (b) of: inserting the outer surface of the protection sleeve into a bore in an aiming arm attached to an intramedullary nail; step (c) may further comprise advancing the protection sleeve and drill sleeve through the bore in the aiming arm to align with a fastener hole in the bone fixation element; and step (e) comprises drilling a hole in the bone through the fastener hole in the intramedullary nail.
- the method may further comprising the steps of: (h) inserting a bone fastener and screwdriver through the protection sleeve; (i) driving the bone fastener into the hole in the bone to fix the bone fixation element to the bone; and 0) removing the protection sleeve from the patient.
- FIG. 1 is a cross sectional assembled view of a protection sleeve, drill sleeve and trocar device of the present invention.
- FIGS. 2a and 2b are side and detail views of the trocar element of the device of FIG. 1;
- FIGS. 5a and 5b are side and cross-section views of the drill sleeve of FIG. 3a employing an alternative retention feature design;
- FIGS. 6a and 6b are side and cross-section views of the protection sleeve of FIG. 4a for use with the drill sleeve retention feature design of FIGS.
- FIG. 7 is a side view of an exemplary drill bit for use with the device of FIG. 1 ;
- FIG. 8 is a side view of an exemplary bone screw for use with the device of FIG. 1 ;
- FIG. 9 is a cross-section view of the device of FIG. 1 without the trocar, and with the drill bit of FIG. 7 inserted through the drill sleeve;
- FIG. 10 is a cross-section view of the system of FIG. 1 without the trocar and drill sleeve, and with a screw and screwdriver inserted through the protection sleeve;
- FIGS. 11a through 11 c are perspective views of the device of FIG. 1 being used with an aiming arm of an intramedullary nail assembly inserted in a femur;
- FIGS. 12a and 12b are side and cross section views of a wire guide sleeve for use with the protection sleeve of FIGS. 4a-c;
- FIG. 13 is a partial cross section view of a drill used with the protection sleeve of FIGS. 4a-c;
- FIG. 14 is a side view of a guide wire for use with the protection sleeve of FIGS. 4a-c and the wire guide sleeve of FIGS. 12a-b.
- DE HEJb DESCRIPTION OF THE PREFERRED EMBODIMENTS [0045]
- a drilling and screw insertion sleeve device is disclosed for use in installing fasteners for securing orthopedic fixation devices, such as bone plates, intramedullary nails, and the like, to bone segments of the human anatomy. Such fixation devices may be used to repair fractured bones or may be installed to protect against the fracturing of weak bones.
- the trocar 10 shows an exemplary device 1 for such use, comprising a trocar 10, a drill sleeve 20 and a protection sleeve 30.
- the trocar 10, drill sleeve 20 and protection sleeve 30 are in a nested configuration which allows them to be introduced through a surgical incision as a single unit.
- the device 1 when the device 1 is used for drilling holes and placing screws in bone, the device 1 may be inserted through a single incision made through the patient's skin immediately overlying one or more bone screw holes of a plate, nail, etc.
- the individual elements of the system may then be removed as necessary to perform the desired procedure.
- the trocar 10 may be removed after the device 1 has been appropriately placed in contact with the patient's bone or the screw hole of a fixation device.
- the device 1 has a proximal user end 2, a distal incision end 3, and a generally cylindrical longitudinal central portion 4 generally formed by the outer surface of the protection sleeve 30.
- the proximal end 2 is configured for easy grasping by the user, and the distal end 3 may have a tapered configuration to facilitate insertion into an incision in the patient.
- the trocar 10 comprises a rod-like member having proximal and distal ends 110, 120 and a cylindrical center portion 130 having an outer diameter "td,” a longitudinal axis "A-A,” and a length "tl.”
- the proximal end 110 may comprise a flange element 112 having an increased
- the trocar flange element 112 may have one or more annular grooves 119 that have a band of color applied to distinguish the trocar as being of a particular size.
- groove 119 may be provided with a band of color that matches similar color bands provided on the drill sleeve 20, protection sleeve 30, and drill 40 of the same system size. Color may be applied to the groove 119 by painting or other appropriate technique.
- the trocar distal end 120 may be tapered to allow easier insertion into the incision in the patient.
- the taper may form an angle ⁇ with respect to the longitudinal axis "A-A," which in the illustrated embodiment is about 30°, although other angles may be provided.
- the distal end 120 may have a tip portion 122 forming a sharp point to further facilitate movement of the trocar 10 (as well as drill sleeve 20 and protection sleeve 30) 1 through the surrounding tissue.
- the tip portion 122 may be used to separate the soft tissue as it is being pressed into and through the incision.
- an exemplary drill sleeve 20 having proximal and distal ends, 210, 220, a central cylindrical portion 230 having a longitudinal axis "B-B", and a length "dsl.”
- the drill sleeve 20 further may have an outer cylindrical surface 232 having a diameter "dod,” and an inner c hdricarsiirfa ⁇ e ⁇ il 234 , rtavn ⁇ g ⁇ , a' 1 d ⁇ ameter "did" defining a longitudinal bore 236
- the drill sleeve bore 236 may be sized to accept the cylindrical center portion 130 of trocar 10 during insertion of the sleeve 20 into the patient as part of system 1, and as illustrated in Fig. 1.
- the bore 236 may also be sized to accept an appropriately sized drill bit 40 (Figs. 7, 9) to allow drilling of underlying bone through the drill sleeve 20 along longitudinal axis "B-B" once the sleeve 20 has been introduced through the incision.
- the proximal end 210 of the drill sleeve 20 may comprise a flange
- the flange 212 having a diameter "dsfd” that is greater than the sleeve outer diameter "dod.”
- the flange 212 may further have a proximal end face 214 configured to engage the distal end face 118 of the trocar 10 when the trocar is fully inserted into the drill sleeve 20 (see Fig. 1).
- the flange 212 may further have a distal end face 216 configured to engage a proximal annular end face 314 of the protection sleeve 30 (see Figs. 1 and 4b), as will be described in more detail later.
- bore 236 may taper slightly outward at a point immediately adjacent the sleeve proximal end 210.
- the drill sleeve flange 212 may have an outer gripping surface 218 configured to allow easy grasping by a user.
- the outer diameter of the proximal end face 214 is larger than the outer diameter of distal end face 216, such that gripping surface 218 disposed therebetween is angled to face slightly in the distal direction. Gripping surface 218 is also slightly concave to more closely conform to the user's fingers as they may be applied to pull the drill sleeve 20 out of engagement with protection sleeve 30.
- (u ' 0'55]" ' " ll 'Tne'tfrilPsfeev ⁇ diStal end 220 may be tapered to allow easier insertion into the incision in the patient.
- the taper may form an angle ⁇ with respect to the longitudinal axis "B-B," which in the illustrated embodiment is about 30°, and which substantially matches angle ⁇ of the trocar distal end 120.
- the length "dsl” may be such that when the trocar 10 is inserted through the bore 236 of the drill sleeve, the distal tip 122 extends a distance "x" distally beyond the distal end 220 of the drill sleeve 20 (see Fig. 1).
- the drill sleeve 20 may further incorporate a locking feature to provisionally axially retain the drill sleeve within the protection sleeve 30 during handling and installation.
- This locking feature may be easily overcome by the application of finger pressure between the drill and protection sleeve flanges 212, 312 (Fig. 4a), as previously noted.
- the locking feature comprises a circumferential ridge 2000 located adjacent proximal end flange 212.
- ridge 2000 may have first and second tapered surfaces 2010, 2020 and a top surface 2030 having a height "rh” .
- the first and second tapered surfaces 2010, 2020 may be oriented at taper angles ⁇ , ⁇ with respect to the longitudinal axis "B-B" of the drill sleeve 20.
- the tapers 2010, 2020 may allow smooth engagement and disengagement of the circumferential ridge with an internal recess 3000 (Fig. 4c) of the protection sleeve 30, as will be described in more detail later.
- one or both of the tapered surfaces may also be slightly concave.
- the first tapered surface 2010 may engage the inner surface 334 of the protection "s"leevfe 30 td provide""! smooth compression of the proximal end 210 of the drill sleeve 20.
- the second tapered surface 2020 may contact the proximal end wall 3010 of the recess 3000 in the protection sleeve 30 to prevent the drill sleeve 20 from falling out of the proximal end 210 of the protection sleeve 30 during normal handling.
- the second surface taper angle ⁇ may be greater than the first surface taper angle ⁇ to result in a relatively low required engagement force between the pieces 20, 30 and a slightly higher disengagement force for separation of the pieces.
- ⁇ may be from about 5 degrees to about 90 degrees, and in one embodiment, ⁇ is about 30 degrees, ⁇ may be from about 1 degree to about 90 degrees, and in one embodiment, ⁇ is about 5 degrees.
- Ridge height "rh" may be from about 0.2 mm to about 1.0 mm, and in one embodiment is about 0.4 mm.
- a pair of longitudinal slots 2050, 2060 may be provided in diametrically opposed relationship in the drill sleeve proximal end 210 to allow compression of the drill sleeve 20 so that the circumferential ridge 2000 may engage the protection sleeve recess 3000.
- the slots 2050 may divide the proximal end 210 of the drill sleeve into first and second opposing halves 2110, 2120 that may be flexed toward each other to temporarily reduce the outer dimension of the circumferential ridge 2000 during installation and removal of the drill sleeve 20 from the protection sleeve 30.
- the slots 2050, 2060 may run from the drill sleeve proximal end 210 to a location between the sleeve proximal and distal ends 210, 220.
- the slots 2050, 2060 may have a length "si" and a width "sw,” and at their distafe ⁇ as rfiay be' pirb id ' ed with a stress-reducing enlarged cutout 2070, which in the illustrated embodiment is a circular cutout.
- Slot length "si" may be from about 20 mm to about 150 mm, and in one embodiment is about 65 mm.
- Slot width "sw” may be from about 0.5 mm to about 3.0 mm, and in one embodiment is about 1.0 mm.
- drill sleeve 20 could be provided with one or more slots, as desired. Further, where more than one slot is employed, the slots may have different lengths and/or different widths. Furthermore, the slots may have varying widths along their respective lengths.
- side flats 2080, 2090 may be provided on the outer surface 232 of the drill sleeve adjacent the drill sleeve proximal end 210.
- These flats 2080, 2090 may be disposed at 180 degree intervals, and may be centered on the slots 2050, 2060 to further facilitate insertion of the drill sleeve 20 into the protection sleeve 20. Since the slots 2050, 2060 only allow compression of the drill sleeve 20 in one dimension, the flats 2080, 2090 eliminate the remaining interference between the circumferential ridge 2000 and the inner surface 334 of the protection sleeve 30 adjacent to the slots 2050, 2060. It is noted that providing the drill sleeve 20 with more than two slots may allow the sleeve to be compressed in two dimensions, and thus the side flats 2080, 2090 may not be required.
- the drill sleeve 20 may be color-coded to distinguish the sleeve as corresponding to a particularly sized drill bit.
- the central cylindrical portion 230 may have an annular groove 232 formed in the outer surface 232 into which a band of color may be applied. The color applied may match the color applied to a trocar 10 that is sized to be received within the bore 236 of the drill sleeve 20.
- an exemplary protection sleeve 30 having proximal and distal ends, 310, 320, a central cylindrical portion 330 having a longitudinal axis "C-C", and a length "psl.”
- the protection sleeve 30 further may have an outer cylindrical surface 332 having a diameter "pod,” and an inner cylindrical surface 334 having a diameter "pid” defining a longitudinal bore 336 running along the length "psl.”
- the protection sleeve bore 336 may be sized to accept the cylindrical center portion 230 of drill sleeve 20 during insertion of the sleeves 20, 30 into the patient as part of system 1, and as illustrated in Fig. 1.
- the bore 336 may also be sized to accept an appropriately sized screw 50 and screwdriver 60 (Fig. 10) to facilitate insertion of the screw into the underlying bone through the protection sleeve 30 along the sleeve longitudinal axis "C-C" once the sleeve 30 has been introduced through the incision.
- the inner diameter "pid” may be about 1.0 mm to about 17.0 mm to allow insertion of screws, spiral blades or helical blades therethrough. Further description regarding such blades is provided in co-pending United States nonprovisional patent application serial number 10/269,976 to Roth et al., filed October 15, 2002 and titled "Orthopedic Implant Insertion Instruments," the entirety of which application is incorporated herein by reference.
- the protection sleeve 30 may receive screws having major diameters of from about 1 mm to about 8 mm and having head diameters of about 1.0 mm to about 12.0 mm.
- the proximal end 310 of the protection sleeve 30 may comprise a flange 312 having a diameter "psfd" that is greater than the sleeve outer diameter "pod.”
- the flange 312 may further have a proximal end face 314 configured to engage the distal end face 216 of the drill sleeve 20 when the drill sleeve is fully inserted irtttrt ⁇ p'r ⁇ td'ct ⁇ or sleeve 3U (see Fig. 1).
- the flange 312 may further have a distal end face 316 configured to allow gripping by a user.
- the protection sleeve flange 312 may further have an outer gripping surface 318 disposed between the proximal and distal end faces 314, 316 and configured to allow easy grasping by a user.
- the outer diameter of the proximal end face 314 is smaller than the outer diameter of distal end face 316, such that gripping surface 318 disposed therebetween is angled to face slightly in the proximal direction.
- Gripping surface 318 also may be slightly concave to more closely conform to the user's fingers as they may be applied to hold the protection sleeve 30 while pulling the drill sleeve 20 out of engagement with protection sleeve 30.
- the protection sleeve 30 may further have a recess 3000 disposed in the bore 336 adjacent the sleeve proximal end 310.
- This recess 3000 may be configured to engage the circumferential ridge 2000 of the drill sleeve 20 when the drill sleeve is fully inserted into the protection sleeve 30.
- the recess 3000 may have a diameter "rd,” and proximal and distal end surfaces 3010, 3020 that provide a transition between the recess 3000 and the bore 336.
- Recess diameter may be sized to provide a recess depth "rd” of from about 0.2 mm to about 1.0 mm to provide the desired interference and locking with circumferential ridge 2000. In one embodiment, the recess depth "rd” is about 0.6 mm. Further, to facilitate insertion of the drill sleeve 20 into the protection sleeve 30, the bore 336 may taper slightly outward immediately adjacent the sleeve proximal end 310.
- the protection sleeve distal end 320 may be tapered to allow easier insertion into the incision in the patient.
- the taper may form an angle ⁇ with r s'pe ⁇ t'to'fh ' fdnfjitud ⁇ rfal axis ' "C-C,” which in the illustrated embodiment is about 30°, and which substantially matches angles ⁇ and ⁇ of the trocar and drill sleeve distal ends 120, 220.
- the length "psl” may be such that when the drill sleeve 20 is inserted through the bore 336 of the protection sleeve, the distal end 220 extends a distance "y" distally beyond the distal end 320 of the protection sleeve 30 (see Fig. 1).
- This distance "y” may be selected so that the tapered ends 122, 220, 320 of the trocar 10, drill sleeve 20 and protection sleeve correspond to form one relatively smooth tapered surface which may facilitate the insertion and advancement of the two pieces into a patient incision.
- FIG. 5a - 5c show a drill sleeve 1200 having an alternative provisional retention feature comprising a raised circumferential ridge 1222 configured to engage a corresponding recess 1322 in an alternative protection sleeve 1300 (see Figs. 6a, 6b).
- the ridge 1222 may be disposed on the outer surface 1232 of the sleeve 1200 adjacent the distal end face of flange 1212.
- the drill sleeve 1200 may have a longitudinal slot 1224 formed in the proximal end 1210 and extending distally to intersect with an elongated window 1226 disposed between the inner and outer surfaces 1232, 1234 of the sleeve.
- Figs. 6a - 6c show a protection sleeve 1300 for use with the drill sleeve 1200 of Figs. 5a - 5c in which circumferential recess 1322 is disposed in inner surface 1334 adjacent proximal end flange 1312.
- Recess 1322 may be configured to receive ridge 1222 of the drill sleeve 1200 when the drill sleeve is inserted fully criz ⁇ th ' e'fjr ⁇ te ⁇ ti ⁇ n'sleeve 1300 as described previously in relation to the drill sleeve 20 and protection sleeve 30 of Figs. 3a and 4a.
- the drill sleeve 1200 of Figs. 5a - 5c and the protection sleeve 1300 of Figs. 6a-6c may further incorporate any or all of the other features previously described in relation to the drill sleeve 20 and protection sleeve 30 of Figs. 3a and 4a (e.g.
- distal end taper dimensions, color- coding, flange configurations, etc.
- the invention has been described as having the projection formed on the drill sleeve and the recess formed in the protection sleeve, this arrangement may be reversed.
- a projection or projections may be provided on the inner surface of the protection sleeve and the corresponding recess or recesses may be provided on the drill sleeve outer surface.
- the projection provided on the drill sleeve (or alternatively on the protection sleeve) may be formed by machining. Thus, if the sleeve itself is machined from a single piece of material, the projection may be formed during the general machining process.
- the projection may be provided by depositing a weld bead or fillet about the circumference of the drill sleeve/protection sleeve and then machining or grinding the bead or filled to the desired shape.
- the projection may comprise a series of raised rivets or applied nubs integrated, into the surface of the drill guide/protection sleeve and configured to engage the recess of the protection sleeve.
- the projection could be formed using a short sleeve or annular ring applied to the drill sleeve or protection sleeve. Such an arrangement may simplify the machining of the drill sleeve/protection
- Fig. 7 shows an exemplary drill bit 40 for use with the device 1.
- the drill bit 40 may have a proximal coupling end 410, a distal drilling end 420 and a central cylindrical shaft portion 430 disposed therebetween.
- a set of calibration marks 440 may be provided along at least a portion of the shaft 430. These calibration marks may be used to determine the depth to which the drill has been driven into bone.
- Fig. 8 shows an exemplary fastener for use with the device 1 in which bone screw 50 has a head 510 and a threaded shank 520, the head having a maximum diameter "msd” that is slightly smaller than the inner diameter "pid" of protection sleeve 30.
- the head may further have a drive recess 530 configured to receive the driving tip 610 of screwdriver 60 (see Fig.
- protection sleeve 30 is sized to receive bone screw 50 and screwdriver 60 to allow the screw 50 to be driven into the underlying bone via protection sleeve 30 and along axis "C-C.”
- a method of using the invention to engage a bone fastener with a fixation device and underlying bone is also provided. To assemble the device 1,
- drill sleeve 20 may be inserted into protection sleeve 30 until the circumferential ridge 2000 of the drill sleeve engages the proximal end 310 of the protection
- the assembled device 1 (Fig. 1) may then be inserted into an incision in the patient overlying a targeted bone screw hole of a fixation element.
- the user may insert the pointed end 3 of the device 1 into the incision, pressing the device down through the tissue by applying force to the device flanges 112, 212, 312.
- the tapered distal end surfaces 122, 220, 320 may serve to separate the tissue, facilitating passage of the device therethrough.
- the trocar 10 may be removed, and a drill bit may be 40 inserted through the bore 236 of the drill sleeve.
- the drill bit 40 may be advanced until the cutting end engages bone, and drilling may be performed until a desired depth is reached, as indicated by calibration marks 440 on the drill bit.
- the drill bit 40 may be removed from the drill sleeve 20, and drill sleeve 20 may be removed from the protection sleeve by squeezing together the arms 2110, 2120 of the proximal flange 212 and pulling the drill sleeve 20 up and away from the protection sleeve 30.
- An appropriately sized bone screw 50 may then be engaged with the end of a screwdriver 60 and the two may be inserted into the bore 336 of the protection sleeve 30 via the sleeve proximal end 310.
- the screw 50, and screwdriver 60 may then be advanced through the sleeve to engage the fixation device and/or the drilled hole in the bone.
- the screwdriver 60 may then be used to drive the bone screw into the bone hole, fixing the fixation device to the bone. Thereafter, the screwdriver 60 and protection sleeve 30 may be removed from the incision and the incision may be sutured closed.
- " Figs. 11a * -' ' i c ll'd ' strate the use of the invention for installing locking screws in the shaft of an intramedullary nail.
- intramedullary nail 70 is inserted in the intramedullary canal of a patient femur 80.
- Aiming arm 90 is engaged with the nail 70, and is used to guide the trajectory of the locking screw 50 to precisely align with one or more pre-formed fixation holes 72 in the nail 70.
- the device 1 may be inserted into an appropriate bore 92 in the aiming arm 90 corresponding to a fixation hole 72 in the nail 70.
- the outer surface 332 of the protection sleeve 30 may slide within the aiming arm bore 92 to align the device 1 with the fixation hole 72.
- Figs. 12a & b Shown in Figs. 12a & b is a wire guide sleeve 400 that may be used together with the protection sleeve 30 of Figs. 4a-c to create an initial opening in bone for insertion of an intramedullary nail.
- the sleeves 400, 30 may be used for inserting a spiral blade or helical blade into a fractured femoral head to connect the head to the associated femoral shaft.
- a large pre-drilled bone hole may be required to receive such large fixation devices (e.g. from about 8 mm to about 17 mm), and thus the protection sleeve may be used for receiving and guiding the large sized drill bit 500 (see Fig. 13) for drilling the hole in the bone.
- the wire guide sleeve 400 may be used for engaging a guide wire 600 (see Fig. 4)"for alig ⁇ irig h ⁇ sleBves J 400; 30 with the bone segments to be fixed.
- the guide wire 600 may be pre-inserted in at least one bone segment to provide precise alignment of the sleeves 400, 30 to ensure the drilled bone hole will have the precise trajectory desired by the surgeon.
- a bone hole thus prepared may ensure that the installed fixation device engages the bone portions in a manner that will best facilitate fusion of the fractured bone segments.
- the wire guide sleeve 400 may have any or all of the features of the drill sleeve 20 described in relation to Figs. 3a - e (e.g. tapered distal end 401, proximal flange element 402, generally cylindrical body portion 403, color coding, etc.).
- the wire guide sleeve 400 may also comprise any of the locking features as described in relation to Figs.
- the wire guide sleeve 400 has a circumferential ridge 404 having all of the features described in relation to circumferential ridge 2000 of drill sleeve 20 (see Fig. 3c), and also has longitudinal slots 406, 407 having all the features described in relation to slots 2050, 2060 of the drill sleeve 20 (see Fig. 3a). Further, the wire guide sleeve 400 may have a distal inner surface portion 405 sized and configured to coaxially receive the guide wire 600.
- the distal inner surface portion may have an inner diameter "wgid" of about 3.3 mm, which may accept a standard 3.0 mm guide wire.
- the outer surface diameter "wgod'Of the wire guide sleeve 400 may be from about 4 mm to about 17 mm, to allow it to be slidably received within the longitudinal bore 336 of the protection sleeve 30.
- the wire guide sleeve 400 may be received within the protection sleeve 30 and the assembled sleeves may thus receive the guide wire 600. It is noted that the indicated dimensions are provided for purposes of illustration only, and that other sizes, both larger and smaller, are also contemplated.
- the surgeon may first make an incision in the patient's skin to the depth of the bone.
- the protection sleeve 30, guide sleeve 400 and trocar 10 may be nested together as previously described in relation to Fig. 1 and driven through the incision down to the bone.
- the trocar 10 may then be removed and a guide wire inserted through the cannulation 405 in the wire guide sleeve 400 and advanced into the bone under x-ray or fluoroscopic observation.
- the guide wire 600 may have a threaded or drilling tip 602 that may allow the surgeon to positively engage the guide wire 600 to the bone.
- the wire guide sleeve 400 may then be disengaged from the protection sleeve 30 by radially compressing the flange 402 to disengage the locking feature, and may be slipped off the free end 604 of the guide wire 600.
- a drill 500 having a cannulation 502 may be placed over the free end 604 of the guide wire 14 and inserted into the bore 336 of the protection sleeve 30. The drill 500 may be advanced through the protection sleeve 30 until the tip 504 contacts bone and then may be rotated to drill the desired hole in the bone. Once the bone hole has been formed, the drill 500 and protection sleeve 30 may then be removed from the incision.
- the guide wire 600 may be removed or it may be left in place to be used as part of a subsequent procedure.
- the surgeon may undertake the same steps as described above, with the exception that instead of removing the protection sleeve 30 and guide wire 600 after the hole has been drilled, the surgeon may retain both elements in place and remove only the drill bit 500. Thereafter, a cannulated helical blade or Spiral blade may be slipped over the free end 604 of the guide wire andinserted- t ⁇ the Bore -336 Of the protection sleeve 30.
- a cannulated driving tool may follow the helical or spriral blade over the guide wire 600 and may be used to drive the blade into to the hole in the bone.
- the protection sleeve 30, drill sleeve 20, wire guide sleeve 400, trocar 10 and any or all of the other described instruments may be provided as part of an orthopedic kit for use during surgical procedures in which percutaneous placement of fasteners will be performed.
- the kit may comprise one or more device, and each device may comprise a trocar, drill sleeve, and protection sleeve sized to correspond to a different screw size.
- the kit includes a wire guide sleeve 400, it as well as the trocar and protection sleeve may be sized to correspond to different nail or spiral/helical blade sizes.
- the kit may contain three separate devices sized to correspond to screw sizes of 3.2 mm, 4.0 mm and 5.0 mm, respectively. Other device sizes may be provided as desired.
- the trocar 10, drill sleeve 20, wire guide sleeve 400 and protection sleeve 30 may be made of stainless steel, titanium, polymer or any other appropriate material.
- the trocar, drill sleeve and protection sleeve are manufactured from a martinsitic stainless steel.
- the trocar 10, drill sleeve 20, wire guide sleeve 400 and protection sleeve 30 also may be manufactured from a radiolucent or partially radiolucent materials such as ultra high molecular weight polyethylene (UHMWPE), poly-ether- ether-ketone (PEEK), extruded carbon fiber or other such material. Any or all of the components of the system may also be disposable.
- UHMWPE ultra high molecular weight polyethylene
- PEEK poly-ether- ether-ketone
- the invention in relation to its use with an intramedullary nail system, that the invention may be a"pptie.d d L Sny' orthopedic appil ⁇ ation in which a stabilizing device, such as a bone plate, rod, nail, etc., is to be applied to a bone.
- a stabilizing device such as a bone plate, rod, nail, etc.
- the invention may find application in maxillofacial indications where small-sized plates are applied to portions of the cranio-facial skeleton and where screw sizes may be as small as 1.0 mm.
- the invention may be used in large-scale applications, accepting up to 17 mm drills used for installation of spiral blades, helical blades, or for facilitating opening the insertion site for an intramedullary nail.
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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DE602005025624T DE602005025624D1 (en) | 2004-05-19 | 2005-05-17 | |
BRPI0511243A BRPI0511243B8 (en) | 2004-05-19 | 2005-05-17 | orthopedic system |
JP2007527409A JP4726902B2 (en) | 2004-05-19 | 2005-05-17 | Snap-fit lock on drill sleeve |
KR1020067026802A KR101176152B1 (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve |
AU2005244927A AU2005244927B2 (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve |
NZ551912A NZ551912A (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve that prevents the inadvertent separation of the telescopic parts |
EP05751069A EP1750597B1 (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve |
CA2567396A CA2567396C (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve |
AT05751069T ATE493078T1 (en) | 2004-05-19 | 2005-05-17 | SNAP CLOSURE FOR A DRILL SLEEVE |
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US10/849,714 | 2004-05-19 | ||
US10/849,714 US7033363B2 (en) | 2004-05-19 | 2004-05-19 | Snap-lock for drill sleeve |
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WO2005112793A1 true WO2005112793A1 (en) | 2005-12-01 |
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PCT/US2005/017394 WO2005112793A1 (en) | 2004-05-19 | 2005-05-17 | Snap-lock for drill sleeve |
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US (3) | US7033363B2 (en) |
EP (2) | EP2275045B1 (en) |
JP (1) | JP4726902B2 (en) |
KR (1) | KR101176152B1 (en) |
CN (1) | CN100473364C (en) |
AT (1) | ATE493078T1 (en) |
AU (1) | AU2005244927B2 (en) |
BR (1) | BRPI0511243B8 (en) |
CA (1) | CA2567396C (en) |
DE (1) | DE602005025624D1 (en) |
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WO (1) | WO2005112793A1 (en) |
ZA (1) | ZA200610160B (en) |
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US20060190001A1 (en) | 2006-08-24 |
US9480488B2 (en) | 2016-11-01 |
JP2007537835A (en) | 2007-12-27 |
CN100473364C (en) | 2009-04-01 |
EP1750597A1 (en) | 2007-02-14 |
EP1750597A4 (en) | 2010-01-13 |
DE602005025624D1 (en) | 2011-02-10 |
ZA200610160B (en) | 2008-06-25 |
AU2005244927B2 (en) | 2010-06-03 |
CA2567396C (en) | 2013-09-10 |
US7033363B2 (en) | 2006-04-25 |
US20150150568A1 (en) | 2015-06-04 |
US8974466B2 (en) | 2015-03-10 |
EP2275045B1 (en) | 2012-05-16 |
JP4726902B2 (en) | 2011-07-20 |
EP1750597B1 (en) | 2010-12-29 |
AU2005244927A1 (en) | 2005-12-01 |
BRPI0511243A (en) | 2007-11-27 |
EP2275045A1 (en) | 2011-01-19 |
CN1988852A (en) | 2007-06-27 |
US20050261698A1 (en) | 2005-11-24 |
ATE493078T1 (en) | 2011-01-15 |
KR20070023756A (en) | 2007-02-28 |
BRPI0511243B1 (en) | 2017-03-21 |
KR101176152B1 (en) | 2012-08-23 |
NZ551912A (en) | 2009-09-25 |
CA2567396A1 (en) | 2005-12-01 |
BRPI0511243B8 (en) | 2021-06-22 |
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