Reduction screw tab break off and storage instrument

Patent metadata

Field	Value
Publication number	US-11096725-B2
Application number	US-201916276324-A
Country	US
Kind code	B2
Filing date	Feb 14, 2019
Priority date	Feb 14, 2019
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

Various exemplary methods and devices are provided for the removal and retention of bone screw rod reduction tabs extending from one or more bone screws implanted in a spinal column during a surgical procedure. In one embodiment, a removal and retention tool is provided having an elongated shaft with a channel formed therein that is configured to receive a rod reduction tab. The elongate shaft can be advanced over a rod reduction tab on a screw, and moved laterally to detach the reduction tab from the screw. The tool can include features to engage and retain the detached tab within the channel. Moreover, the tool can be configured to receive and retain multiple tabs, thus eliminating the need to remove the tool from a surgical site. The tool can also include a release actuator for releasing any tabs stored within the elongate shaft as may be needed.

First claim

What is claimed is:

1. A tool for breaking off and retaining a rod reduction tab on a spinal screw, the tool comprising:
an elongate shaft having rails extending along opposed sides thereof between proximal and distal ends thereof and a back wall extending between the rails, wherein the back wall is disposed opposite an open side of the elongate shaft, the rails and the back wall defining a channel therebetween configured to slidably receive at least one rod reduction tab on a spinal screw, the elongate shaft further including a deflectable retaining member formed in the back wall and disposed within the channel and configured to frictionally engage a rod reduction tab received within the channel; and
a release actuator slidably disposed within the channel, the release actuator being configured to slide proximally in response to receipt of a rod reduction tab within the channel, and the release actuator being configured to advance distally to overcome a bias applied by the deflectable retaining member and to distally eject any rod reduction tabs disposed within the channel.

2. The tool of claim 1 , further comprising a handle coupled to the proximal end of the elongate shaft.

3. The tool of claim 1 , further comprising at least one stop on the elongate shaft adjacent the distal end, the at least one stop being configured to retain the release actuator within the channel.

4. The tool of claim 3 , wherein the at least one stop on the elongate shaft comprises a retaining bar extending across the channel.

5. The tool of claim 1 , wherein the channel is configured to receive and store at least four rod reduction tabs.

6. The tool of claim 1 , wherein the release actuator includes a thumb concavity configured to seat a user's thumb.

7. The tool of claim 1 , wherein the release actuator includes a distal extension configured to abut against a proximal end of a rod reduction tab disposed within the channel.

8. The tool of claim 7 , wherein the distal extension is configured to deflect the deflectable retaining member out of the channel.

9. The tool of claim 1 , wherein the deflectable retaining member includes a projection on a distal end thereof protruding into the channel.

10. A tool for breaking off and retaining a rod reduction tab on a spinal screw, the tool comprising:
an elongate shaft having an open distal end and a channel extending proximally from the open distal end to an opposite proximal end, the channel defined by rails extending along opposed sides thereof and a back wall extending between the rails, wherein the back wall is disposed opposite an open side of the elongate shaft, the channel configured to slidably receive at least one rod reduction tab on a spinal screw inserted into the open distal end, the elongate shaft further including a deflectable retaining member coupled to the back wall and disposed within the channel and configured to frictionally engage a rod reduction tab received within the channel; and
a release actuator slidably disposed within the channel, the release actuator being configured to slide proximally along the rails in response to receipt of a rod reduction tab within the channel, and the release actuator being configured to advance distally along the rails to overcome a bias applied by the deflectable retaining member and to distally eject any rod reduction tabs disposed within the channel.

11. The tool of claim 10 , further comprising a handle coupled to the proximal end of the elongate shaft.

12. The tool of claim 10 , further comprising at least one stop on the elongate shaft adjacent the open distal end, the at least one stop being configured to retain the release actuator within the channel.

13. The tool of claim 12 , wherein the at least one stop on the elongate shaft comprises a retaining bar extending across the channel.

14. The tool of claim 10 , wherein the channel is configured to receive and store at least four rod reduction tabs.

15. The tool of claim 10 , wherein the release actuator includes a thumb concavity configured to seat a user's thumb.

16. The tool of claim 10 , wherein the release actuator includes a distal extension configured to abut against a proximal end of a rod reduction tab disposed within the channel.

17. The tool of claim 16 , wherein the distal extension is configured to deflect the deflectable retaining member out of the channel.

18. The tool of claim 10 , wherein the deflectable retaining member includes a projection on a distal end thereof protruding into the channel.

Assignees

• Medos Int Sarl

Inventors

• Peterson Joseph
• Spratt Frank

Classifications

• A61B17/7086

  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 title

• A61B2090/037

  with a frangible part, e.g. by reduced diameter · CPC title

• A61B17/7035

  Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other · CPC title

• A61B17/8863 Primary

  Apparatus for shaping or cutting osteosynthesis equipment by medical personnel · CPC title

• A61B17/7091

  for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges · CPC title