ROD REDUCER INSTRUMENT FOR SPINAL SURGERY

• US 20170252074A1
• Filed: 03/02/2017
• Published: 09/07/2017
• Est. Priority Date: 03/04/2016
• Status: Active Grant

• Current Assignee: Spinal Elements, Inc.
• Original Assignee: Spinal Elements, Inc.
• Inventors: Semingson, Taylor, Shoshtaev, Eugene, Martin, Greg, Blain, Jason
• Granted Patent: US 10,085,778 B2
• Time in Patent Office: Days
• 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 17/7086 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
• 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
• CPC Class Codes: A61B 2090/0808 for indicating correct assembly of components, e.g. of the surgical apparatus
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument

Abstract

Embodiments of a rod reducer and methods of using a rod reducer are provided. In some embodiments, the rod reducer includes a sleeve comprising a lumen and one or more tabs; an engagement member comprising a distal portion and a proximal portion, wherein the proximal portion is configured to be rotated relative to the distal portion; and a collar coupled to the sleeve, wherein the collar is configured to deflect the tabs inward into the lumen. In some embodiments, the rod reducer has a first configuration wherein the tabs engage the proximal portion and the proximal portion can be rotated to translate the engagement member and the rod reducer has a second configuration wherein the proximal portion can be pushed or pulled to translate the engagement member.

Claims

1. A rod reducer comprising:

a sleeve comprising a lumen and one or more tabs;

an engagement member comprising a distal portion and a proximal portion, wherein the proximal portion is configured to be rotated relative to the distal portion;

a collar coupled to the sleeve, wherein the collar is configured to deflect the tabs inward into the lumen,

wherein the rod reducer has a first configuration wherein the tabs engage the proximal portion and the proximal portion can be rotated to translate the engagement member,

wherein the rod reducer has a second configuration wherein the proximal portion can be pushed or pulled to translate the engagement member.

2. The rod reducer as in claim 1, wherein the sleeve comprises a pair of legs separated by a slot.

3. The rod reducer as in claim 2, wherein the pair of legs is configured to remain straight in the first configuration and the second configuration.

4. The rod reducer as in claim 1, wherein the collar is configured to be rotated to switch between the first configuration and the second configuration.

5. The rod reducer as in claim 1, wherein the sleeve and the engagement member each comprise a marking, wherein alignment of the markings indicate a position to switch between the first configuration and the second configuration.

6. The rod reducer as in claim 1, wherein the sleeve and the engagement member each comprise a marking, wherein alignment of the markings indicates a distal position of the engagement member.

7. The rod reducer as in claim 1, wherein the sleeve and the engagement member each comprise a marking, wherein alignment of the markings indicate a maximum distal position of the engagement member for coupling the rod reducer to a fastener.

8. The rod reducer as in claim 1, wherein the tabs comprise threads and the proximal portion of the engagement member comprise threads.

9. The rod reducer as in claim 1, wherein the sleeve comprises one or more notches near a distal end, the one or more notches configured to allow the sleeve to rotate relative to a fastener.

10. The rod reducer as in claim 1, wherein the sleeve and the distal portion of the engagement member comprise a mating configuration.

11. The rod reducer as in claim 10, wherein the mating configuration comprises an undercut.

12. The rod reducer as in claim 10, wherein the rod reducer includes one or more alignment features configured to ensure alignment of the mating configuration.

13. The rod reducer as in claim 10, wherein in the mating configuration, the distal portion of the engagement member prevents a pair of legs of the sleeve from deflecting.

14. The rod reducer as in claim 1, wherein the engagement member comprises a lumen configured to accept a set screw.

15. A method of using a rod reducer comprising:

pushing or pulling a proximal portion of an engagement member to translate a distal portion of the engagement member within a lumen of a sleeve;

rotating a collar to deflect one or more tabs into engagement with the proximal portion of the engagement member; and

rotating the proximal portion of the engagement member to translate the distal portion of the engagement member within the lumen of the sleeve.

16. The method as in claim 15, further comprising engaging a thread of one or more tabs with a thread of the proximal portion of the engagement member.

17. The method as in claim 15, further comprising rotating the proximal portion of the engagement member relative to the distal portion of the engagement member.

18. The method as in claim 15, further comprising engaging an undercut of the sleeve with the distal portion of the engagement member.

19. The method as in claim 15, further comprising coupling a distal portion of the sleeve to a fastener.

20. The method as in claim 19, further comprising rotating the sleeve to decouple the distal portion of the sleeve from the fastener.

21. The method as in claim 15, further comprising aligning a marking of the sleeve with a marking of the engagement member prior to rotating the collar.

22. The method as in claim 21, wherein aligning a marking of the sleeve with a marking of the engagement member indicates that a thread of the one or more tabs aligns with a thread of the proximal portion of the engagement member.

23. The method as in claim 15, wherein the proximal portion of the engagement member is rotated until a marking of the sleeve is aligned with a marking of the engagement member indicating that the distal portion of the engagement member is in a distalmost position.

24. The method as in claim 21, wherein aligning a marking of the sleeve with a marking of the engagement member indicates when the distal portion of the engagement member is sufficiently coupled with the sleeve to prevent a pair of legs of the sleeve from unintentionally disengaging from a fastener.