SURGICAL TOOLS FOR TREATMENT OF SPINAL STENOSIS

• US 20120143206A1
• Filed: 12/27/2011
• Published: 06/07/2012
• Est. Priority Date: 06/25/2009
• Status: Abandoned Application

• Current Assignee: Baxano Surgical, Inc.
• Original Assignee: Baxano Surgical, Inc.
• Inventors: Wallace, Michael P., Leguidleguid, Roy, Leguidleguid, Ronald, Cantorna, Nestor C.
• Application Number:
  US13/338,134
• Publication Number:
  US 20120143206A1
• Time in Patent Office: Days
• US Class Current: 606/103
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2017/320044 Blunt dissectors

Abstract

Described herein are devices and methods for positioning a wire around a target tissue. In some embodiments, a probe device includes a rigid outer cannula having a curved distal region and a flexible inner cannula slideably disposed within the rigid outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula. In some embodiments, the probe device further includes a distal tip at the distal end of the inner cannula and a safety retainer cable coupled to the distal tip and secured to the probe proximally from the distal end of the safety retainer; wherein the safety retainer cable extends proximally from the distal tip and is slack. In some embodiments, the inner cannula comprises an elongate body with a longitudinally extending support member and a longitudinally extending tubular body, configured to pass a wire, disposed inside the elongate body.

Claims

1. A probe device for positioning a wire around a target tissue, the device comprising:

a rigid outer cannula having a curved distal region;

a flexible inner cannula slideably disposed within the rigid outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula;

a safety retainer extending distally; and

a distal tip at the end of the inner cannula, the distal tip coupled to the safety retainer.

2. The device of claim 1, wherein the distal tip comprises a port for exit of a wire through the distal tip.

3. The device of claim 1, wherein the safety retainer extends proximally to distally along with the inner cannula.

4. The device of claim 1, wherein at least a portion of the safety retainer is held slack within the device.

5. The device of claim 1, wherein the safety retainer is secured to the probe near the proximal end region of the safety retainer.

6. The device of claim 1, wherein the safety retainer comprises a cable extending within a safety retainer lumen within a cannula wall of the inner cannula.

7. The device of claim 4, wherein the cable is slideably disposed within the safety retainer lumen within the cannula wall of the inner cannula.

8. The device of claim 7, wherein the safety retainer comprises a loop of material extending within a first safety retainer lumen extending through the cannula wall, through the distal tip, and extending within a second safety retainer lumen extending through the cannula wall.

9. The device of claim 8, wherein the loop of cable is slack within the safety retainer lumens of the inner cannula.

10. The device of claim 1, wherein the safety retainer comprises a cable disposed within a central lumen of the inner cannula.

11. The device of claim 10, wherein the cable is slideably disposed within the central lumen of the inner cannula.

12. The device of claim 10, wherein the cable is slack within the central lumen of inner cannula.

13. The device of claim 1, wherein the cable is Nitinol.

14. The device of claim 1, wherein the safety retainer comprises a loop of material extending within a central lumen of the inner cannula, through the distal tip, and extending back within the central lumen of the inner cannula.

15. The device of claim 1, further comprising a longitudinally extending shape memory member.

16. The device of claim 15, wherein the shape memory member is a tubular member disposed within a central lumen within a cannula wall of the inner cannula.

17. The device of claim 15, wherein the shape memory member is a tubular member disposed within a central lumen of the inner cannula adjacent to the safety retainer also within the central lumen.

18. The device of claim 15, wherein the shape memory member is a Nitinol tube.

19. A probe device for positioning a wire around a target tissue, the probe device comprising:

a rigid outer cannula having a curved distal region;

a flexible inner cannula slideably disposed within the rigid outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula;

a distal tip at the distal end of the inner cannula; and

a safety retainer cable coupled to the distal tip and secured to the probe proximally from the distal end of the safety retainer;

wherein the safety retainer cable extends proximally from the distal tip and is slack.

20. A probe device for positioning a wire around a target tissue, the device comprising:

an outer cannula having a curved distal region;

an inner member slideably disposed within the outer cannula, wherein the inner member comprises;

an elongate body;

a longitudinally extending support member disposed inside the elongate body, and

a longitudinally extending tubular body disposed inside the elongate body, configured to assume a curved shape when extended distally from the outer cannula, and configured to pass a wire, and

a distal tip coupled to the support member.

21. The device of claim 20, wherein the elongate body comprises a central lumen configured to receive the tubular body and at least one support member lumen to receive the support member.

22. The device of claim 20, wherein the elongate body comprises a single central lumen and the support member and the tubular body are disposed inside the central lumen of the elongate body.

23. The device of claim 20, wherein the solid support members are curved.

24. The device of claim 20, wherein the solid support members comprises a shape memory alloy.

25. The device of claim 20, wherein the tubular body is a shape memory material.

26. The device of claim 25, wherein the tubular body is Nitinol.

27. The device of claim 25, wherein the tubular body has a curved distal end.

28. The device of claim 20, wherein the tubular body is flanked by solid support members.

29. A probe device for positioning a wire around a target tissue, the device comprising:

an outer cannula having a curved distal region sized and configured to be advanced towards a lateral recess and a neural foramen in a patient;

an inner cannula slideably disposed within the outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula and configured to extend through the neural foramen and at least partially around an anterior portion of a facet joint and posterior to a spinal disc; and

a proximal handle comprising a hand grip region coupled to the outer cannula and a plunger region coupled to the inner cannula.

30. A probe device for positioning a wire around a target tissue, the device comprising:

an outer cannula having a curved distal region;

an inner cannula slideably disposed within the outer cannula, wherein the inner cannula is configured to assume a curved shape when extended distally from the outer cannula; and

a proximal handle comprising a hand grip region coupled to the outer cannula and a plunger region coupled to the inner cannula;

wherein the proximal end of the plunger region comprises a funneled port for insertion of a wire through the probe.