Method and apparatus for performing spinal surgery

Patent metadata

Field	Value
Publication number	US-9554833-B2
Application number	US-201314029724-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Nov 10, 2009
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

Implants, instruments, and methods for performing surgical procedures on the spine, including one or more of creating an operative corridor to the spine, delivering implants to the spine, fusing one or more segments of the spine, and fixing one or more segments of the spine.

First claim

What is claimed is:

1. An inserter for anchoring a bone anchor, comprising:
a driver assembly extending along a longitudinal axis and having a driver shaft and a distal engagement feature configured to engage a drive feature of the bone anchor;
a receptacle that is coupled to the driver assembly such that the receptacle cannot rotate relative to the distal engagement feature, and that is configured to translate along the longitudinal axis relative to the bone anchor, wherein such translation causes the receptacle to deflect while the driver shaft does not translate along the longitudinal axis relative to the bone anchor; and
a blade engagement member including a first elongate wing extension extending along a first length parallel to the longitudinal axis and a second elongate wing extension extending along a second length parallel to the longitudinal axis, the first elongate wing extension and the second elongate wing extension configured to slidably engage a retractor blade of a retractor assembly, wherein a plane that contains the first length and the second length is offset from the longitudinal axis.

2. The inserter of claim 1 , wherein the driver shaft freely rotates relative to the blade engagement member such that a retractor blade attached to the blade engagement member does not rotate with the bone anchor as the bone anchor is driven into bone.

3. The inserter of claim 1 , wherein the blade engagement member further comprises a deflectable tab configured to be received within notches in the retractor blade.

4. The inserter of claim 1 , wherein the receptacle has deflectable flanges that are configured to deflect inward around the head of the bone anchor to secure the bone anchor to the receptacle.

5. The inserter of claim 4 , including a thumb wheel linked to the receptacle that when operated draws the deflectable flanges into a cylindrical body of the blade engagement member causing the deflectable flanges to deflect.

6. The inserter of claim 5 , wherein the distal engagement feature of the driver assembly is housed within the receptacle such that when a bone anchor head is secured in the receptacle the distal engagement feature will engage with the bone anchor head drive feature.

7. The inserter of claim 6 , wherein the receptacle rotates with the driver shaft.

8. The inserter of claim 7 , wherein the driver shaft is cannulated.

9. An inserter for anchoring a bone anchor, comprising:
a driver assembly having a driver shaft and a distal engagement feature configured to engage a drive feature of the bone anchor;
an engagement assembly having a blade engagement member configured to releasably engage a retractor blade of a retractor assembly, the blade engagement member including a body having a pair of wing extensions configured to engage with a pair of track grooves along an interior face of the retractor blade and a deflectable tab configured to be received within notches in the retractor blade; and
a receptacle that surrounds a portion of the driver and that is coupled to the driver assembly such that the receptacle cannot rotate relative to the distal engagement feature, and which, upon translation relative to the engagement assembly and relative to the driver, deflects to hold the bone anchor.

10. The inserter of claim 9 , wherein the driver shaft freely rotates relative to the blade engagement member such that a retractor blade attached to the blade engagement member does not rotate with the bone anchor as the bone anchor is driven into bone.

11. The inserter of claim 9 , further including a thumb wheel linked to the receptacle that when operated draws the deflectable flanges into a cylindrical body of the blade engagement member causing the deflectable flanges to deflect.

12. The inserter of claim 11 , wherein the distal engagement feature of the driver assembly is housed within the receptacle such that when a bone anchor head is secured in the receptacle the distal engagement feature will engage with the bone anchor head drive feature.

13. The inserter of claim 12 , wherein the receptacle rotates with the driver.

14. The inserter of claim 13 , wherein the driver shaft is cannulated.

15. An inserter for anchoring a bone anchor, comprising:
a driver assembly having a driver shaft and a distal engagement feature configured to engage a drive feature of the bone anchor;
a receiver assembly having a receiver shaft and a receiver member including a receptacle configured to releasably capture a head of the bone anchor therein, wherein the receiver shaft is disposed within the driver shaft; and
a blade engagement member configured to releasably engage a retractor blade of a retractor assembly and that is rotationally independent from the driver assembly such that when a retractor blade is releasably engaged to the blade engagement member the retractor blade does not rotate with the driver assembly.

16. The inserter of claim 15 , wherein the receptacle has deflectable flanges that are configured to deflect inward around the head of the bone anchor to secure the bone anchor to the receiver member.

17. The inserter of claim 16 , including a thumb wheel linked to the receiver member that when operated draws the deflectable flanges into a cylindrical body of the blade engagement member causing the deflectable flanges to deflect.

18. The inserter of claim 16 , wherein the distal engagement feature of the driver assembly is housed within the receptacle such that when a bone anchor head is secured in the receptacle the distal engagement feature will engage with the bone anchor head drive feature.

19. The inserter of claim 18 , wherein the receptacle rotates with the driver shaft.

20. The inserter of claim 19 , wherein the driver shaft is cannulated.

21. The inserter of claim 15 , wherein the driver shaft freely rotates relative to the blade engagement member such that a retractor blade attached to the blade engagement member does not rotate with the bone anchor as the bone anchor is driven into bone.

22. The inserter of claim 15 , wherein the blade engagement member comprises a body with a pair of wing extensions that are configured to slidably engage a pair of track grooves along an interior face of the retractor blade.

23. The inserter of claim 22 , wherein the blade engagement member further comprises a deflectable tab configured to be received within notches in the retractor blade.

24. An inserter for anchoring a bone anchor, comprising:
a driver assembly having a cannulated driver shaft and a distal engagement feature configured to engage a drive feature of the bone anchor;
a receiver member configured to capture a head of the bone anchor, the receiver member including a receptacle coupled to the driver assembly such that the receptacle cannot rotate relative to the distal engagement feature and houses the distal engagement member, such that when the bone anchor is captured in the receptacle the distal engagement member engages with the bone anchor drive feature, the receptacle including deflectable flanges configured to deflect inward around a head of the bone anchor when the receiver member translates along the longitudinal axis relative to the driver assembly to secure the bone anchor in the receptacle; and
a blade engagement assembly configured to releasably engage a retractor blade of a retractor assembly, the blade engagement assembly is configured to enable translation of the receiver member independent of the driver assembly,

Assignees

• Nuvasive Inc

Inventors

• Woolley Troy B
• Lovell Nathan
• Serra Michael
• Peterson Mark

Classifications

• A61B17/7077 Primary

  for moving bone anchors attached to vertebrae, thereby displacing the vertebrae · CPC title

• A61B1/32

  Devices for opening or enlarging the visual field, e.g. of a tube of the body · CPC title

• A61B17/7076

  for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation · CPC title

• A61B2017/0256

  for the spine · CPC title

• A61B17/0206 Primary

  with antagonistic arms as supports for retractor elements · CPC title