RCDF Instrument, Apparatus and Procedures

• US 20180353225A1
• Filed: 08/22/2018
• Published: 12/13/2018
• Est. Priority Date: 06/01/2016
• Status: Active Application

• Current Assignee: SpineCraft, LLC
• Original Assignee: SpineCraft, LLC
• Inventors: Asaad, Wagdy, Asadollahi, Mohammad Saeid
• Application Number:
  US16/108,489
• Publication Number:
  US 20180353225A1
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/7032 Screws or hooks with U-shaped head or back through which longitudinal rods pass
• CPC Class Codes: A61B 17/7076 for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
• 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 2017/564 Methods for bone or joint treatment

Abstract

Instruments, apparatus and procedures for performing surgical operations are provided. A sleeve for performing surgical procedures may include an elongate main body; a channel extending within a length of the elongate main body; and a retainer configured and dimensioned to releasably retain a fixation member in the sleeve at a predetermined orientation and predetermined distance from a distal end of the sleeve. An assembly for performing surgical procedures may include a sleeve comprising: an elongate main body, a channel extending within a length of the elongate main body; a fixation member having been preloaded in the sleeve; and a bone fastener comprising: a shaft configured to engage bone, a tulip configured to receive a rod, a retention feature and extended tabs extending from the tulip.

Claims

1. A sleeve for performing surgical procedures, said sleeve comprising:

an elongate main body;

a channel extending within a length of said elongate main body;

slots formed in said elongate main body and extending linearly along said length of said elongate main body said slots comprising distal end openings configured to slidably receive extended tabs that extend from a bone fastener therein; and

a retainer configured and dimensioned to releasably retain a fixation member in said sleeve at a predetermined orientation and predetermined distance from a distal end of said sleeve.

2. The sleeve of claim 1, wherein said retainer is resiliently deformable to receive the fixation member.

3. The sleeve of claim 2, wherein said retainer comprises at least one leaf spring.

4. The sleeve of claim 3, wherein said retainer comprises a pair of opposing leaf springs.

5. The sleeve of claim 2, wherein said retainer comprises at least one prong to releasably capture said fixation member.

6. The sleeve of claim 1, wherein a distal end portion of said sleeve is configured and dimensioned to attach to a tulip portion of a bone fastener.

7. The sleeve of claim 1, wherein said sleeve further comprises a tool interface configured to mate with a working end of a counter-torque tool.

8. The sleeve of claim 1, further comprising a passage formed through opposite walls of a distal end portion of said sleeve, said passage being configured to allow a rod or other connector to pass therethrough.

9. The sleeve of claim 7, wherein said tool interface is on external, side surfaces of said sleeve.

10. The sleeve of claim 1, wherein said slots comprise stops that are configured to mate lengthwise along sides of the extended tabs to prevent rotation of said sleeve relative to the extended tabs.

11. The sleeve of claim 1, further comprising an alignment feature provided on an inner surface of a wall of said elongate main body, configured to properly align an orientation of said sleeve in a height direction relative to a bone fastener, when said sleeve is attached to the bone fastener.

12. The sleeve of claim 11, wherein said alignment feature comprises a ledge or shoulder.

13. The sleeve of claim 1, further comprising stays forming anti-splaying slots with a wall of said elongate main body, wherein said anti-splaying slots are configured to receive proximal end portions of the extended tabs such that said stays contact said proximal end portions on outsides of said proximal end portions, and said wall contacts said proximal end portions on insides of said proximal end portions and said stays are configured to prevent splaying of the extended tabs.

14. The sleeve of claim 1, further comprising said fixation member releasably retained by said retainer at said predetermined orientation and predetermined distance from said distal end of said sleeve.

15. The sleeve of claim 14, wherein said fixation member comprises a set screw.

16. A sleeve for performing surgical procedures, said sleeve comprising:

an elongate main body;

a channel extending within a length of said elongate main body; and

elongated slots extending lengthwise in said elongate main body and having distal open ends configured and dimensioned to receive extended tabs that extend from a bone fastener, wherein the elongated slots are alignable with the extended tabs so that the extended tabs are slidable through the distal open ends and into the elongated slots; and

an alignment feature provided on an inner surface of a wall of said elongate main body, configured to properly align an orientation of said sleeve in a height direction relative to a bone fastener, when said sleeve is attached to the bone fastener.

17. The sleeve of claim 16, wherein said slots comprise stops that are configured to mate with sides of the extended tabs to prevent rotation of said sleeve relative to the extended tabs.

18. The sleeve of claim 16, wherein said alignment feature comprises a ledge or shoulder.

19. The sleeve of claim 16, further comprising stays forming anti-splaying slots with the a wall of said elongate main body, wherein said anti-splaying slots are configured to receive proximal end portions of the extended tabs and said stays are configured to prevent splaying of the extended tabs.

20. An assembly for performing surgical procedures, said assembly comprising:

a sleeve comprising;

an elongate main body; and

a channel extending within a length of said elongate main body;

a fixation member having been preloaded in said sleeve; and

a bone fastener comprising;

a shaft configured to engage bone;

a tulip configured to receive a rod;

a retention feature; and

extended tabs integral with and extending from said tulip;

wherein a distal end portion of said sleeve is mounted over said tulip;

wherein said extended tabs are received in slots in said sleeve by relative, linear sliding of said extended tabs relative to said slots; and

wherein said fixation member is located at a predetermined orientation and distance from a distal end of said sleeve to approximate a proximal end of said retention feature.

21. The assembly of claim 20, wherein said sleeve further comprises a retainer that releasably retains said fixation member in said sleeve at said predetermined orientation and said predetermined distance from said distal end of said sleeve.

22. The assembly of claim 21, wherein said retainer is resiliently deformable to receive the fixation member.

23. The assembly of claim 20, wherein said sleeve further comprises a tool interface configured to mate with a working end of a counter-torque tool.

24. The assembly of claim 23, further comprising a counter-torque tool, said working end of said counter-torque tool engageable with said tool interface.

25. The assembly of claim 20, wherein said sleeve further comprises a passage formed through opposite walls of said distal end portion of said sleeve, said passage being configured to allow the rod or other connector to pass therethrough.

26. The assembly of claim 20, wherein said slots extend over a majority of a length of said elongate main body.

27. The assembly of claim 26, wherein said slots comprise stops that mate with sides of said extended tabs to prevent rotation of said sleeve relative to said extended tabs.

28. The assembly of claim 20, wherein said sleeve further comprises an alignment feature provided on an inner surface of a wall of said elongate main body, configured to properly align an orientation of said sleeve in a height direction relative to said bone fastener.

29. The assembly of claim 20 wherein said sleeve further comprises stays forming anti-splaying slots with the a wall of said elongate main body, wherein said anti-splaying slots receive proximal end portions of said extended tabs and said stays prevent splaying of said extended tabs.

30. The assembly of claim 20, wherein said fixation member comprises a set screw.

31. A method of performing a surgical procedure, said method comprising:

providing an elongate sleeve having proximal and distal ends and a channel extending therethrough;

releasably retaining a fixation member in said channel of said sleeve at a predetermined orientation and predetermined distance from said distal end of said sleeve; and

assembling said sleeve on a bone fastener, wherein said assembling comprises aligning slots of the elongate sleeve with extended tabs of said bone fastener and linearly sliding the slots over the extended tabs.

32. The method of claim 31, wherein said fixation member is preloaded into said channel prior to said assembling.

33. The method of claim 31, wherein said fixation member is advanced against a retainer that resiliently deforms to allow said fixation member to pass by and resiliently returns to an unbiased configuration to releasably retain said fixation member.

34. The method of claim 33, wherein said retainer is spring loaded.

35. The method of claim 31, wherein said fixation member comprises a set screw.

36. The method of claim 32, wherein said fixation member is preloaded by:

mounting said fixation member on a loading block; and

advancing said fixation member and said loading block into said channel from said distal end of said sleeve.

37. The method of claim 31, further comprising:

mating said fixation member with a retention member of said bone fastener.

38. The method of claim 37, further comprising performing an operation on said bone fastener by manipulating said sleeve.

39. The method of claim 38, wherein said operation comprises at least one of reduction, distraction or compression.

40. The method of claim 38, further comprising finally fixing said fixation member in said retention member.

41. The method of claim 40, further comprising removing said sleeve from said bone fastener and breaking off said extended tabs.

42. The method of claim 31, wherein said elongate slots comprise stops that contact said extended tabs on opposite sides and prevent rotation of said elongate sleeve relative to the extended tabs.