Instrument and method for guiding surgical implants and instruments during surgery

• US 7,491,208 B2
• Filed: 04/28/2005
• Issued: 02/17/2009
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Bruneau, Aurelien, Melkent, Anthony J., Pond, John D. Jr.
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): Araj; Michael J
• Application Number:
  US11/117,034
• Publication Number:
  US 20060247658A1
• Time in Patent Office: 1,391 Days
• Field of Search: 606/61, 606/86, 606/99, 606/104, 606/246, 606/277, 606/279
• US Class Current: 606/104
• CPC Class Codes: A61B 17/7011 Longitudinal element being non-straight, e.g. curved, angled or branched adjustable length longitudinal elements A61B17/7014; A61B17/7019 takes precedence, e.g. coil springs
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7082 for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws driving other bone screws A61B17/8875
• CPC Class Codes: A61B 17/7085 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
• CPC Class Codes: A61B 17/7091 for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges

Abstract

An apparatus is provided for guiding a surgical implant to a bone anchor during surgery. The apparatus includes a bone anchor extender releasably attachable to the bone anchor wherein the bone anchor extender clips onto a head portion of the bone anchor to assist in guiding the surgical implant to the bone anchor.

Claims

1. A device for guiding surgical implants to a bone anchor during surgery comprising:

a first bone anchor extender and a second bone anchor extender, wherein each of said first and second bone anchor extenders extends along a longitudinal axis between a proximal end and a distal end and further comprises;

a clip positioned at said proximal end and including a medial portion extending along said longitudinal axis to said proximal end, said clip further including first and second side portions extending substantially parallel to said longitudinal axis and substantially perpendicularly to said medial portion, said first and second side portions each including a raised tab projecting therefrom toward the other said first and second side portions structured for receiving and releasably attaching to a first portion of a head portion of said bone anchor; and

an extension portion extending distally from said clip to a position above said head portion of said bone anchor when said clip is releasably attached to said head portion of said bone anchor; and

wherein said first and second bone anchor extenders assist in guiding the surgical implant to the bone anchor.

2. The device of claim 1 wherein said clip further comprises:

a medial surface extending along said medial portion and from which said extension portion distally extends, said medial surface extending laterally between a first edge and an opposite second edge and further comprising a bumper projecting from said medial surface between said first and second side portions; and

wherein said first side portion extends from said first edge of said medial surface and said second side portion extends from said second edge of said medial surface.

3. The device of claim 2 wherein said first side portion and said second side portion extend perpendicularly from said medial surface.

4. The device of claim 2 wherein said first side portion and said second side portion extend substantially perpendicularly from said medial surface.

5. The device of claim 2 wherein said raised tabs are located in facing relation to one another with each spaced a same distance from said medial surface and a same distance from said proximal end.

6. The device of claim 5 wherein said first raised tab is integrally formed with said first side portion and said second raised tab is integrally formed with said second side portion.

7. The device of claim 5 wherein each of said first raised tab and said second raised tab comprises an angled face and a retention edge, said retention edge being positioned opposite from said angled face and closer to said medial surface than said angled face.

8. The device of claim 7 wherein said angled face guides a portion of said head portion of said bone anchor to a position where said portion of said head portion is secured between said retention edge and said medial surface whereby retaining said bone anchor extension on said bone anchor.

9. The device of claim 5, wherein said first raised tab and said second raised tab are positioned in a plane spaced apart from and extending substantially parallel to said medial surface.

10. A device for guiding a surgical implant to a bone anchor during surgery comprising:

a first bone anchor extender extending along a longitudinal axis between a proximal end and a distal end, said first bone anchor extender further comprising a clip portion releasably attachable to said bone anchor, said clip portion extending from said proximal end toward said distal end of said first bone anchor extender and including a medial surface laterally extending between a first longitudinal sidewall and a second longitudinal sidewall, said first and second sidewalls extending substantially transversely from said medial surface to a terminal portion and forming facing surfaces defining an area therebetween for receiving said bone anchor, wherein said first bone anchor extender further comprises an elongate extension portion extending distally from said proximal portion to said distal end, said extension portion being bendable relative to said clip portion and elastic to revert back its pre-bent shape; and

a second bone anchor extender extending along a longitudinal axis between a proximal end and a distal end, said second bone anchor extender further comprising a clip portion releasably attachable to said bone anchor on a side of said bone anchor opposite said first bone anchor extender, said clip portion extending from said proximal end toward said distal end of said second bone anchor extender and including a medial surface laterally extending between a first longitudinal sidewall and a second longitudinal sidewall, said first and second sidewalls extending substantially transversely from said medial surface to a terminal portion and forming facing surfaces defining an area therebetween for receiving said bone anchor, wherein said second bone anchor extender further comprises an elongate extension portion extending distally from said proximal portion to said distal end, said extension portion being bendable relative to said clip portion and elastic to revert back its pre-bent shape, wherein said extension portions of said first and second bone anchor extenders are spaced from one another to provide a pathway therebeteween.

11. The device of claim 10 wherein said first and second bone anchor extenders each further comprises:

said extension portion extending distally from a distal end of said clip portion to a position above said bone anchor when said clip portion is releasably attached to said bone anchor.

12. The device of claim 11 wherein for each of said first and second bone anchor extenders a width of said clip portion is greater than a width of said extension portion.

13. The device of claim 11 wherein for each of said first and second bone anchor extenders each of said first sidewall and said second sidewall includes a tapered portion extending between said terminal portion and said extension portion at said distal end of said clip portion.

14. The device of claim 10 wherein for each of said first and second bone anchor extenders said area defined between said first and second sidewalls is sized and structured for receiving a portion of a head portion of said bone anchor.

15. The device of claim 14 wherein for each of said first wad second bone anchor extenders said medial surface is contoured complementarily to said head portion of said bone anchor.

16. The device of claim 15 wherein said medial surface is contoured in an arc.

17. The device of claim 10 wherein for each of said first and second bone anchor extenders said first sidewall and said second sidewall extend substantially parallel to one another in a first direction from said medial surface.

18. The device of claim 10 wherein for each of said first and second bone anchor extenders said medial surface further comprises a bumper extending transversely therefrom, said bumper being positioned to space said bone anchor from said medial surface when said bone anchor extender is connected to said bone anchor.

19. The device of claim 18 wherein said bumper is integrally formed with said medial surface.

20. A device for guiding a surgical implant to a bone anchor during surgery comprising:

a first bone anchor extender extending along a longitudinal axis between a proximal end and a distal end, said first bone anchor extender further comprising a clip portion releasably attachable to said bone anchor, said clip portion extending from said proximal end toward said distal end of said first bone anchor extender and including a medial surface laterally extending between a first longitudinal sidewall and a second longitudinal sidewall, said first and second sidewalls extending substantially transversely from said medial surface to a terminal portion and forming facing surfaces defining an area therebetween for receiving said bone anchor; and

a second bone anchor extender extending along a longitudinal axis between a proximal end and a distal end, said second bone anchor extender further comprising a clip portion releasably attachable to said bone anchor on a side of said bone anchor opposite said first bone anchor extender, said clip portion extending from said proximal end toward said distal end of said second bone anchor extender and including a medial surface laterally extending between a first longitudinal sidewall and a second longitudinal sidewall, said first and second sidewalls extending substantially transversely from said medial surface to a terminal portion and forming facing surfaces defining an area therebetween for receiving said bone anchor, wherein for each of said first and second bone anchor extenders said first sidewall further comprises a first raised tab positioned thereon and said second sidewall further comprises a second raised tab positioned thereon.

21. The device of claim 20 wherein said first raised tab is integrally formed with said first sidewall and said second raised tab is integrally formed with said second sidewall.

22. The device of claim 20 wherein each of said first raised tab and said second raised tab comprises an angled face and a retention edge, said retention edge being positioned opposite from said angled face and closer to said medial portion than said angled face.

23. The device of claim 22 wherein said angled face guides a portion of a head portion of said bone anchor to a position where said portion of said head portion is secured between said retention edge and said medial surface whereby retaining said bone anchor extension on said bone anchor.

24. The device of claim 20, wherein for each of said first and second bone anchor extenders said first raised tab is positioned between said terminal portion of said first sidewall and said medial surface and said second raised tab is positioned between said terminal portion of said second sidewall and said medial surface.

25. The device of claim 24, wherein for each of said first and second bone anchor extenders said first and second raised tabs are elongated and extend substantially parallel to said longitudinal axis of said bone anchor extender.

26. The device of claim 25, wherein for each of said first and second bone anchor extenders said first raised tab further includes a first leading edge extending at an angle from said first sidewall toward said medial surface and intersecting a first retention edge extending substantially transversely from said first sidewall and said second raised tab further includes a second leading edge extending at angle from said second sidewall toward said medial surface and intersecting a second retention edge extending substantially transversely from said second sidewall.

27. The device of claim 26, wherein for each of said first and second bone anchor extenders said clip portion further comprises a projection positioned on said medial surface between said first and second sidewalls, said projection extending transversely from said medial surface and being structured to space said bone anchor from said medial surface and into contact wit said first and second retention edges when said clip portion is releasably attached to said bone anchor.

28. A device for guiding a surgical implant to a bone anchor during surgery, said device comprising:

an elongated guide member extending along a longitudinal axis between a proximal end and a distal end, said elongated member defining a clip portion at said proximal end, said clip portion including;

a recessed medial surface extending between a first raised lateral edge and a second raised lateral edge, said first and second raised lateral edges each extending substantially perpendicularly to said medial surface and said medial surface includes a bumper extending therefrom between said first and second raised lateral edges;

a first elongated tab portion projecting substantially transversely from said first lateral edge toward said second lateral edge; and

a second elongated tab portion projecting substantially transversely from said second lateral edge toward said first lateral edge; and

wherein said clip portion is structured to receive a portion of said bone anchor between said first and second elongated tab portions and said medial surface to releasably attach said guide member to said bone anchor.