Systems and methods for treatment of compressed nerves

• US 8,652,157 B2
• Filed: 05/18/2012
• Issued: 02/18/2014
• Est. Priority Date: 08/07/2009
• Status: Expired due to Fees

• Current Assignee: Thayer Intellectual Property, Inc.
• Original Assignee: Thayer Intellectual Property, Inc.
• Inventors: McCormack, Bruce M., Eyster, Edward Fletcher, Smith, Jeffrey D., Liou, Edward, Carver, Jonathan, How, Peter, Druker, Joshua, Leugers, Martin, Tanaka, Shigeru, McCormack, Joseph G.
• Primary Examiner(s): Hughes, S. Thomas
• Assistant Examiner(s): NGUYEN, TIN DUC
• Application Number:
  US13/475,745
• Publication Number:
  US 20130131454A1
• Time in Patent Office: 641 Days
• Field of Search: 606/167, 606/170, 606/171, 606/176, 606/177, 606/178, 606/159, 606/108, 606/79, 606/40, 604/523, 600/567, 600562-566, 301/663, 303/35, 301/62, 303/69, 303/92, 303/93, 303/94
• US Class Current: 606/176
• CPC Class Codes: A61B 1/00045 Display arrangement
• CPC Class Codes: A61B 1/00087 Tools A61B17/00234 takes precedence
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00188 with focusing or zooming features
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/320036 adapted for use within the carpal tunnel
• CPC Class Codes: A61B 2090/309 using white LEDs
• CPC Class Codes: A61B 2090/3614 using optical fibre
• CPC Class Codes: A61B 5/4893 Nerves
• CPC Class Codes: A61B 5/6847 mounted on an invasive device

Abstract

Disclosed herein is a system for releasing a ligament. In one embodiment, the system includes a proximal handle, a tubular body, and a flexible body. The tubular body includes a proximal end and a distal end. The handle is coupled to the proximal end. The flexible body extends through the tubular body and includes a tissue cutting portion. The flexible body or tubular body is longitudinally displaceable to move the tissue cutting portion between a non-deployed state and a deployed state.

Claims

1. A system for releasing a ligament, the system comprising:

a proximal handle;

an outer tubular body comprising a proximal end and a plurality of first portions of a cutting structure, the proximal handle coupled to the proximal end of the outer tubular body; and

an inner flexible body extending through the outer tubular body and comprising a plurality of second portions of the cutting structure,

wherein at least one of the inner flexible body or the outer tubular body is longitudinally displaceable relative to the other to combine the first portions of the cutting structure with the second portions of the cutting structure to form the cutting structure when the cutting structure is in a deployed state, and

wherein at least one of the first portions and at least one of the second portions of the cutting structure align with each other to form a tooth or a serration structure of the cutting structure when the first portions and the second portions are combined in the deployed state.

2. The system of claim 1, wherein the first portions of the cutting structure comprises at least a portion of teeth or serrations structures forming the cutting structure.

3. The system of claim 2, wherein the second portions of the cutting structure comprises at least another portion of teeth or serrations structures forming the cutting structure.

4. The system of claim 1, wherein the inner flexible body and the outer tubular body are configured to prevent tissue from substantially engaging the first portions of the cutting structure when the first portions and the second portions are not combined to form the cutting structure.

5. The system of claim 1, wherein the first portions of the cutting structure comprises teeth or serration structures with proximal generally vertical surfaces and distal sloped surfaces, the second portions of the cutting structure comprises teeth or serration structures with proximal generally vertical surfaces and distal sloped surfaces.

6. The system of claim 5, wherein, when the first and the second portions are combined, the vertical surfaces of the first and the second portions combine to form the vertical surfaces of the teeth or the serration structures of the cutting structure, and the sloped surfaces of the first and the second portions combine to form the sloped surfaces of the teeth or the serration structures of the cutting structure.

7. The system of claim 5, wherein the teeth or the serration structures of the first portions of the cutting structure are at least partially defined in the outer tubular body via apertures defined in the outer tubular body.

8. The system of claim 1, further comprising an actuator near the proximal handle that causes the at least one of the inner flexible body or the outer tubular body to longitudinally displace relative to the other.

9. The system of claim 8, wherein the actuator is displaced along a track on the proximal handle.

10. The system of claim 1, wherein the first portions of the cutting structure are defined in the outer tubular body by a plurality of openings that expose at least a portion of the inner flexible body extending through the outer tubular body.

11. The system of claim 10, wherein the inner flexible body further comprises a non-cutting portion between a distal end of the inner flexible body and the second portions of the cutting structure, the plurality of openings exposing the non-cutting portion of the inner flexible body when the cutting structure is in a non-deployed state.

12. The system of claim 10, wherein the plurality of openings exposes the second portions of the cutting structure when the cutting structure is in the deployed state.

13. The system of claim 10, wherein the second portions of the cutting structure includes projections and, when the cutting structure is in a non-deployed state, the projections are received in the plurality of openings in such a manner so as to substantially prevent tissue from entering the plurality of openings.

14. The system of claim 13, wherein the inner flexible body is radially outwardly biased to cause the projections to enter the plurality of openings.

15. The system of claim 14, wherein the projections are matingly received in the plurality of openings in such a manner that the projections generally cause a smooth configuration for an outer circumferential surface of the outer tubular body in a region of the first portions of the cutting structure.

16. The system of claim 1, further comprising a distal handle configured to couple to a distal end of the at least one of the inner flexible body or the outer tubular body when the cutting structure is in the deployed state.

17. The system of claim 1, further comprising a nerve sensing system electrically coupled to the outer tubular body or the inner flexible body configured to sense nerve impulses or action potentials.

18. The system of claim 1, wherein the at least one of the first portions and the at least one of the second portions of the cutting structure laterally align with each other to form the tooth or the serration structure of the cutting structure when the first portions and the second portions are combined in the deployed state.

19. The system of claim 1, wherein the first portions of the cutting structure points radially outward from a longitudinal axis of the outer tubular body and the second portions of the cutting structure points radially outward from a longitudinal axis of the inner flexible body.

20. The system of claim 1, wherein the first and the second portions remain combined in the cutting structure during a cutting stroke.

21. A system for releasing a ligament, the system comprising:

a proximal handle;

an outer tubular body comprising a proximal end and a plurality of first portions of a cutting structure, the proximal handle coupled to the proximal end of the outer tubular body; and

an inner flexible body extending through the outer tubular body and comprising a plurality of a second portions of the cutting structure,

wherein at least one of the inner flexible body or the outer tubular body is longitudinally displaceable relative to the other to integrate the first portions of the cutting structure in an unopposed orientation with the second portions of the cutting structure to form the cutting structure when the cutting structure is in a deployed state, and

wherein at least one of the first portions and at least one of the second portions of the cutting structure align with each other to form a tooth or a serration structure of the cutting structure when the first portions and the second portions are integrated in the deployed state.

22. The system of claim 21, wherein the first portions of the cutting structure points radially outward from a longitudinal axis of the outer tubular body and the second portions of the cutting structure points radially outward from a longitudinal axis of the inner flexible body.

23. The system of claim 21, wherein the first portions of the cutting structure comprises at least a portion of teeth or serrations structures forming the cutting structure.

24. The system of claim 23, wherein the second portions of the cutting structure comprises at least another portion of teeth or serrations structures forming the cutting structure.

25. The system of claim 21, wherein the first portions of the cutting structure comprises teeth or serration structures with proximal generally vertical surfaces and distal sloped surfaces, the second portions of the cutting structure comprises teeth or serration structures with proximal generally vertical surfaces and distal sloped surfaces.

26. The system of claim 21, wherein a cutting stroke of the cutting structure occurs without relative longitudinal displacement between the first and the second portions of the cutting structure.

27. The system of claim 21, wherein the first and the second portions remain combined in the cutting structure during a cutting stroke.

28. A system for releasing a ligament, the system comprising:

a proximal handle;

an outer tubular body comprising a proximal end and a first portion of teeth or serration structures that includes a first proximal surface and a first distal surface, the first portion of the teeth or the serration structures pointing radially outward from a longitudinal axis of the outer tubular body, the proximal handle coupled to the proximal end of the outer tubular body; and

an inner flexible body extending through the outer tubular body and comprising a second portion of the teeth or the serration structures that includes a second proximal surface and a second distal surface, the second portion of the teeth or the serration structures pointing radially outward from a longitudinal axis of the inner flexible body,

wherein at least one of the first portion or the second portion is longitudinally displaceable relative to the other to combine the first portion of the teeth or the serration structures with the second portion of the teeth or the serration structures to align the first proximal surface with the second proximal surface and the first distal surface with the second distal surface to form the teeth or the serration structures when the teeth or the serration structures are in a deployed state.

29. The system of claim 28, wherein the first and the second proximal surfaces and the first and the second distal surfaces remain aligned in the cutting structure during a cutting stroke.

30. A system for releasing a ligament, the system comprising:

a proximal handle;

an outer tubular body comprising a proximal end and a first portion of a cutting structure that includes at least a top portion of a tooth or a serration structure that points radially outward from a longitudinal axis of the outer tubular body, the proximal handle coupled to the proximal end of the outer tubular body; and

an inner flexible body extending through the outer tubular body and comprising a second portion of the cutting structure that includes at least a bottom portion of the tooth or the serration structure that points radially outward from a longitudinal axis of the inner flexible body,

wherein at least one of the inner flexible body or the outer tubular body is longitudinally displaceable relative to the other to combine and align the at least the top portion of the tooth or the serration structure with the at least the bottom portion of the tooth or the serration structure to form the tooth or the serration structure of the cutting structure when the cutting structure is in a deployed state.

31. The system of claim 30, wherein the at least the top portion of the teeth or the serrations structure includes proximal generally vertical surfaces and distal sloped surfaces, the at least the bottom portion of the teeth or the serration structure includes proximal generally vertical surfaces and distal sloped surfaces.

32. The system of claim 30, wherein the at least the top portion of the teeth or the serration structure remains combined with the at least the bottom portion of the teeth or the serration structure during a cutting stroke of the cutting structure.