CA2559984A1 - Spinal fixation element and methods - Google Patents

Spinal fixation element and methods Download PDF

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Publication number
CA2559984A1
CA2559984A1 CA002559984A CA2559984A CA2559984A1 CA 2559984 A1 CA2559984 A1 CA 2559984A1 CA 002559984 A CA002559984 A CA 002559984A CA 2559984 A CA2559984 A CA 2559984A CA 2559984 A1 CA2559984 A1 CA 2559984A1
Authority
CA
Canada
Prior art keywords
spinal
fixation element
access device
spinal fixation
feature
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.)
Granted
Application number
CA002559984A
Other languages
French (fr)
Other versions
CA2559984C (en
Inventor
Paul Birkmeyer
Michael Zajack
Erasmo Lopez
Ramon A. Ruberte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DePuy Spine LLC
Original Assignee
Depuy Spine, Inc.
Paul Birkmeyer
Michael Zajack
Erasmo Lopez
Ramon A. Ruberte
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Depuy Spine, Inc., Paul Birkmeyer, Michael Zajack, Erasmo Lopez, Ramon A. Ruberte filed Critical Depuy Spine, Inc.
Publication of CA2559984A1 publication Critical patent/CA2559984A1/en
Application granted granted Critical
Publication of CA2559984C publication Critical patent/CA2559984C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7005—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7083—Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
    • A61B17/7085—Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements for insertion of a longitudinal element down one or more hollow screw or hook extensions, i.e. at least a part of the element within an extension has a component of movement parallel to the extension's axis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00238—Type of minimally invasive operation

Abstract

A spinal fixation element is provided having a feature formed thereon that facilitates placement of the spinal fixation element through an access device, thus allowing the spinal fixation element to be positioned in relation to a spinal anchor that is coupled to the access device and that is implanted in a vertebra in a patient~s spine. The feature also optionally facilitates placement of the spinal fixation element in relation to spinal anchors implanted in adjacent vertebrae. In particular, the spinal fixation element is adapted for use with an access device that has at least one slot or opening formed therein and having a width that is less than a width of the feature, thus preventing the feature from passing therethrough. The spinal fixation element can therefore be inserted through the access device, and a portion of the fixation element can be passed through the slot or opening in the access device while the feature is retained in the access device. As a result, the feature is seated within a spinal anchor that is coupled to the access device, and the remaining portion of the spinal fixation element can extend through the slot, preferably to be positioned within a spinal anchor disposed within an adjacent vertebra.

Claims (30)

1. A spinal implant kit, comprising:
an access device having an inner lumen extending between proximal and distal ends, and at least one opening formed in a sidewall thereof adjacent to the distal end;
and a spinal fixation element having a feature formed thereon adjacent to a terminal end thereof, the feature being sized to prevent passage thereof through the at least one opening in the access device.
2. The spinal implant kit of claim 1, wherein the feature comprises a bulbous protrusion formed on the terminal end of the spinal fixation element.
3. The spinal implant kit of claim 2, wherein the bulbous protrusion includes a substantially flattened portion.
4. The spinal implant kit of claim 1, wherein the feature comprises a protrusion extending radially outward from the spinal fixation element.
5. The spinal implant kit of claim 1, wherein the at least one sidewall opening in the access device extends from the distal end of the access device and terminates distal to the proximal end of the access device.
6. The spinal implant kit of claim 5, wherein the at least one opening has a length that is greater than a length of the spinal fixation element.
7. The spinal implant kit of claim 5, wherein the access device includes opposed openings formed therein.
8. The spinal implant kit of claim 1, further comprising a pusher member adapted to advance the spinal fixation element in a distal direction within the access device.
9. The spinal implant kit of claim 8, wherein the pusher member comprises an elongate shaft having a proximal, handle portion and a distal portion that is slidably disposable within and extends into the at least one opening in the sidewall of the access device.
10. The spinal implant kit of claim 1, further comprising a pusher member that is slidably disposable within the at least one opening in the sidewall of the access device such that it is effective to cause a portion of the spinal fixation element to extend through the at least one opening in the sidewall.
11. The spinal implant kit of claim 10, further comprising an actuating member adapted to move the pusher member between a first, proximal position and a second, distal position.
12. A spinal implant kit, comprising:
an access device having an inner lumen extending between proximal and distal ends, and at least one opening formed in a sidewall thereof adjacent to the distal end;
and a spinal fixation element having a bulbous protrusion formed thereon adjacent to a terminal end thereof, the bulbous protrusion being configured to prevent passage thereof through the at least one opening in the access device.
13. The spinal implant kit of claim 12, wherein the bulbous protrusion has a diameter that is greater than a width of the at least one opening in the access device.
14. A method for implanting a spinal fixation element into at least one spinal anchor disposed within a vertebra in a patient's spinal column, comprising:
introducing a spinal fixation element having a feature formed adjacent to a terminal end thereof through a lumen in an access device coupled to a spinal anchor, the access device including a slot formed in a sidewall adjacent to a distal end thereof and adapted to prevent the feature from passing therethrough; and manipulating the spinal fixation element to cause the feature to sit within a receiving member of the spinal anchor coupled to the access device, and to cause a remaining portion of the spinal fixation element to extend through the slot.
15. The method of claim 14, further comprising the step of locking the feature of the spinal fixation element with respect to the spinal anchor.
16. The method of claim 14, wherein the feature comprises a bulbous protrusion formed on the terminal end of the spinal fixation element.
17. The method of claim 14, wherein the slot in the access device extends from the distal end of the access device and terminates distal to the proximal end of the access device.
18. The method of claim 17, wherein the slot has a length that is greater than a length of the spinal fixation element.
19. The method of claim 17, wherein the access device has a diameter that is less than a length of the spinal fixation element.
20. The method of claim 14, wherein the step of manipulating the spinal fixation element comprises advancing the spinal fixation element distally within the access device using a pusher member.
21. The method of claim 20, wherein the pusher member is slidably disposed within the at least one opening in the sidewall of the access device such that it is effective to cause a portion of the spinal fixation element to extend through the at least one opening in the sidewall.
22. The method of claim 14, wherein the step of manipulating the spinal fixation element further comprises positioning the remaining portion of the spinal fixation element within a receiving member of a spinal anchor disposed within an adjacent vertebra in a patient's spinal column.
23. The method of claim 14, wherein the spinal fixation element is inserted into a proximal end of the access device with the feature leading.
24. The method of claim 23, wherein the step of manipulating the spinal fixation element comprises extending a trailing portion of the spinal fixation element through the slot in the access device.
25. The method of claim 14, wherein the spinal fixation element is inserted into a proximal end of the access device with the feature trailing.
26. The method of claim 25, wherein the step of manipulating the spinal fixation element comprises extending a leading portion of the spinal fixation element through the slot in the access device, and then advancing the feature distally within the access device to seat the feature within the receiving member of the spinal anchor.
27. A method for implanting a spinal fixation element, comprising:
providing at least two spinal anchors implanted in adjacent vertebrae of a patient's spine;
providing an access device having an inner lumen extending between proximal and distal ends, the distal end being adapted to couple to one of the spinal anchors, the access device further including a slot formed in a sidewall thereof adjacent to the distal end;
providing a spinal fixation element having a first end and a second end with a feature formed thereon, the feature being sized to prevent passage thereof through the slot in the sidewall of the access device;
inserting the spinal fixation element through the lumen in the access device;
and manipulating the spinal fixation element to cause the feature to be positioned within the spinal anchor attached to the access device and the first end to extend through the slot, such that the spinal fixation element extends between the spinal anchors.
28. The method of claim 27, wherein the spinal fixation element is inserted through the lumen in the access device with the second end leading and the first end trailing.
29. The method of claim 27, wherein the spinal fixation element is inserted through the lumen in the access device with the first end leading and the second end trailing.
30. The use of the spinal implant kit claimed in any one of claims 1 to 13 for implanting a spinal fixation element.
CA2559984A 2004-03-19 2005-02-10 Spinal fixation element and methods Expired - Fee Related CA2559984C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/708,721 2004-03-19
US10/708,721 US7547318B2 (en) 2004-03-19 2004-03-19 Spinal fixation element and methods
PCT/US2005/004208 WO2005094416A2 (en) 2004-03-19 2005-02-10 Spinal fixation element and methods

Publications (2)

Publication Number Publication Date
CA2559984A1 true CA2559984A1 (en) 2005-10-13
CA2559984C CA2559984C (en) 2010-05-18

Family

ID=34991055

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2559984A Expired - Fee Related CA2559984C (en) 2004-03-19 2005-02-10 Spinal fixation element and methods

Country Status (6)

Country Link
US (2) US7547318B2 (en)
EP (1) EP1737366B1 (en)
JP (1) JP4499152B2 (en)
AU (1) AU2005227866B2 (en)
CA (1) CA2559984C (en)
WO (1) WO2005094416A2 (en)

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US8828005B2 (en) 2014-09-09
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US20090216328A1 (en) 2009-08-27

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