ROD REDUCTION DEVICE

• US 20110087298A1
• Filed: 06/11/2009
• Published: 04/14/2011
• Est. Priority Date: 06/11/2008
• Status: Active Grant

• Current Assignee: K2M, Inc (Stryker Corporation)
• Original Assignee: K2M, Inc (Stryker Corporation)
• Inventors: Jones, Scott
• Granted Patent: US 8,303,595 B2
• Time in Patent Office: Days
• US Class Current: 606/86.A
• CPC Class Codes: A61B 17/7086 Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers

Abstract

A rod reduction device includes a rod reducing member, an anchoring member, and a sleeve. The rod reducing member is configured to engage a spinal rod. The anchoring member is configured to removably attach to a bone anchor. The sleeve defines a longitudinal axis and is operably associated with the rod reducing member and the anchoring member. The sleeve is rotatable with respect to the anchoring member for longitudinally translating the rod reducing member relative to the anchoring member.

Claims

1. A rod reduction device, comprising:

a rod reducing member configured to engage a spinal rod;

an anchoring member configured to removably attach to a bone anchor; and

a sleeve defining a longitudinal axis and being operably associated with the rod reducing member and the anchoring member, the sleeve being operable with respect to the anchoring member for longitudinally translating the rod reducing member relative to the anchoring member.

2. The rod reduction device of claim 1, wherein the sleeve rotates about the longitudinal axis of the sleeve independent of the rod reducing member.

3. The rod reduction device of claim 1, wherein the anchoring member includes first and second arms extending distally from an anchor head.

4. The rod reduction device of claim 3, wherein the internal surface of the sleeve rotates about the external surface of the anchor head.

5. The rod reduction device of claim 3, wherein the sleeve and the anchor head are threadably engaged.

6. The rod reduction device of claim 3, wherein at least one of the first and second arms has a distal end removably attachable to a bone anchor.

8. The rod reduction device of claim 1, wherein the proximal end of the sleeve includes at least one notch configured to engage a driving instrument.

10. The rod reduction device of claim 2, further comprising a ring disposed between the sleeve and the rod reducing member, the ring facilitating the rotational movement of the sleeve relative to the rod reducing member.

20. The rod reduction device of claim 2, wherein the rod reducing member remains rotationally stationary as the sleeve longitudinally translates the rod reducing member in response to the rotation of the sleeve.

7. (canceled)

9. (canceled)

11. (canceled)

12. A rod reduction device, comprising:

a sleeve defining a longitudinal axis and having a pair of arms extending distally herefrom, each arm having a distal end configured to engage that is engagable with a bone anchor;

a rod reducing member operably associated with the sleeve, wherein the rod reducing member translates along the longitudinal axis of the sleeve in response to rotation of the sleeve about the longitudinal axis of the sleeve, wherein the rod reducing member is engagable with a spinal rod for selectively reducing the spinal rod into the bone anchor.

13. The rod reduction device of claim 12, wherein the sleeve includes a threaded internal surface.

15. The rod reduction device of claim 12, wherein the rod reducing member includes an annular ring disposed on a proximal end thereof and the sleeve includes an annular channel extending through a distal end thereof, wherein the annular ring and the annular channel are operably associated with each other.

16. The rod reduction device of claim 15, wherein the sleeve rotates about the longitudinal axis of the sleeve with respect to the annular ring of the rod reducing member.

17. The rod reduction device of claim 12, wherein the sleeve includes at least one notch disposed at the proximal end thereof.

18. The rod reduction device of claim 16, wherein the rod reducing member remains rotationally stationary as the annular channel of the sleeve rotates about the annular ring of the rod reducing member.

19. The rod reduction device of claim 16, wherein the rod reducing member remains rotationally stationary as the sleeve longitudinally translates the rod reducing member in response to the rotation of the sleeve.

14. (canceled)

21. A method of reducing a rod, comprising the steps of:

providing a rod reduction device including a rod reducing member, an anchoring member, and a sleeve;

positioning a bone anchor in bone;

coupling the anchoring member of the rod reduction device to the bone anchor;

rotating the sleeve of the rod reduction device about a longitudinal axis defined by the sleeve;

translating the rod reducing member longitudinally along the longitudinal axis; and

reducing a rod into the bone anchor with the rod reducing member.

22. The method of claim 21, further comprising the step of translating the rod reducing member longitudinally along the longitudinal axis of the sleeve in response to the rotation of the sleeve about the longitudinal axis of the sleeve.

23. The method of claim 21, further comprising the step of maintaining the rod reducing member rotationally stationary as the sleeve rotates about the longitudinal axis of the sleeve.