Surgical access tube

Patent metadata

Field	Value
Publication number	US-9968348-B2
Application number	US-201313775571-A
Country	US
Kind code	B2
Filing date	Feb 25, 2013
Priority date	Feb 25, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

Implementations of the present disclosure provide an access tube including a wall structure and an optional handle extending from the wall structure. Selectively weakened areas facilitate selective resection of the wall structure to reveal windows that accommodate lateral intrusions by surrounding anatomical structures and/or provide increased access to an intervertebral disc. For example, a first distal weakened portion is configured to form a first window to afford lateral intrusion of a spinous process. A second distal weakened portion is configured to form a second window to afford lateral intrusion of facet. A proximal weakened portion is configured to afford additional angular access on a proximal end of the tube.

First claim

That which is claimed:

1. A tube for facilitating access to an anatomical structure through intervening and adjacent anatomical structures, the tube comprising:
a wall structure of material sufficiently stiff to define an hold open a tube opening to the anatomical structure through intervening anatomical structure; the wall structure including a proximal edge and a distal edge and a length extending therebetween;
the wall structure including a plurality of window portions removably formed with the wall structure configured for separation from a remainder of the wall structure to form a window-shaped opening to accommodate medial or lateral intrusion into the tube opening of at least one of the anatomical structures, the plurality of window portions including:
a first window portion located at the proximal edge of the wall structure configured to increase a viewing angle through the tube, the first window portion removably formed from the wall structure adjacent to a first weakened portion extending from the proximal edge and around the perimeter of the first window portion, and
a second window portion located at the distal edge of the wall structure configured to increase a viewing angle through the tube, the second window portion removably formed with the wall structure adjacent to a distal weakened portion extending from the distal edge and around a perimeter of the second window portion.
the first weakened portion is positioned at the same circumferential location as the distal weakened portion, and a second distal weakened portion positioned at an opposite circumferential location from the first weakened portion, each distal weakened portion forms a proximal arc which transitions to straight sides to intersect the distal edge of the tube, the first distal weakened portion having an arc base 5mm to 10mm long, the second distal weakened portion having an arc base 10mm to 20mm long, the second distal weakened portion having a height 1.8 to 3.75 times the height of the first distal weakened portion.

2. A tube of claim 1 , further comprising a third window portion located proximate the distal edge of the wall structure configured to increase a viewing angle through the tube, the third window portion removably formed with the wall structure adjacent to the second distal weakened portion.

3. A tube of claim 2 , wherein the third window portion has a maximum height of 30 mm.

4. A tube of claim 2 , wherein the second window portion is positioned to create a facet window and the third window portion located proximate the distal edge is positioned to create a spinous process window.

5. A tube of claim 4 , wherein the spinous process window and facet window are positioned on opposite sides of the wall structure.

6. A tube of claim 5 , wherein the facet window has a proximal arc shape.

7. A tube of claim 6 , wherein the proximal arc shape has a radius of up to 10 mm.

8. A tube of claim 5 , wherein the second and third windows are asymmetrical.

9. A tube of claim 8 , wherein the spinous process window has a height of 50% or less a height of a spinous process.

10. A tube of claim 9 , wherein the height of the spinous process window is 30 mm or less.

11. A tube of claim 10 , wherein the facet window has a height of 15 mm or less.

12. A tube of claim 10 , wherein the spinous process window is configured to accommodate a spinous process/lamina tapered region.

13. A tube of claim 10 , wherein the spinous process window has a proximal arc shape.

14. A tube of claim 13 , wherein the proximal arc shape has a radius of up to 10 mm.

15. A tube of claim 4 , wherein the spinous process window has a height 1.8 to 3.75 times a height of the facet window.

16. A tube of claim 2 , wherein the wall structure has a diameter and the third window portion has an axial height and a first ratio of the axial height to diameter is from 0.18 to 1.875.

17. A tube of claim 16 , wherein the second window portion is positioned to create a facet window and a second ratio is 0.18 to 0.9375.

18. A tube of claim 17 , wherein the second ratio is 0.42 to 0.45.

19. A tube of claim 16 , wherein the first ratio is 0.71 to 1.875.

20. A tube of claim 19 , wherein the first ratio is 0.9 to 1.1.

21. A tube of claim 2 , wherein a third window portion is located proximate the distal edge has a sweep angle of 15 degrees to 30 degrees.

22. A tube of claim 2 , wherein the first and third window portions are asymmetrical.

23. A tube of claim 1 , wherein the first window portion allows 30 degrees of viewing angle from the proximal edge.

24. A tube of claim 1 , wherein the selectively weakened portion encompasses a total of at least 110 degrees of the distal edge.

25. A tube of claim 1 , wherein the selectively weakened portion extends through a full thickness of the wall structure.

26. A tube of claim 1 , wherein the length is 90 mm or less.

27. A tube of claim 26 , wherein the wall structure is cylindrical and has a diameter of 19 mm or less.

28. A tube of claim 1 , wherein a side of the second window portion defines a sweep angle of between 15 degrees and 120 degrees.

29. A tube of claim 28 , wherein the window portion has a sweep angle of 90 degrees to 120 degrees.

30. A tube of claim 1 , wherein the proximal edge of the wall structure includes light deflecting surfaces that are configured to deflect light at least 30 degrees away from an axis of the wall structure.

31. A tube of claim 30 , wherein all surfaces of the proximal edges are light deflecting surfaces.

32. A tube of claim 31 , wherein the wall structure has a reflection reducing finish.

33. A tube of claim 30 , wherein the wall structure includes a color darker than white.

34. A tube of claim 1 , wherein the proximal edge of the wall structure includes antireflective surfaces.

35. A tube of claim 34 , wherein the antireflective surfaces are at least angled 30 degrees away from a sight line.

36. A tube of claim 1 , wherein the wall structure defines an annular structure having a substantially constant cross-section along the length of the wall structure.

37. A tube of claim 1 , wherein the wall structure is cylindrical and defines a substantially constant diameter along the length.

38. A tube of claim 1 , wherein the wall structure defines a curvilinear shape in cross-section having a substantially constant cross-section along the length of the wall structure.

39. A tube for facilitating access to an anatomical structure through intervening and adjacent anatomical structures, the tube comprising:
a wall structure of material sufficiently stiff to define and hold open a tube opening to the anatomical structure through intervening anatomical structure;
the wall structure including a proximal edge and a distal edge and a length extending therebetween, the wall structure defining an annular structure having a substantially constant cross-section along the length,
the proximal edge including light deflecting surfaces configured to deflect light at least 30 degrees away from an axis of the wall structure, the light deflecting surfaces including:
a first light deflecting surface extending from the proximal edge to an inner surface of the tu

Assignees

• Depuy Synthes Products Inc

Inventors

• Vennard Daniel
• Miller William
• Sims Hewatt Mcgraw

Classifications

• A61B17/0218 Primary

  for minimally invasive surgery (A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence) · CPC title

• A61B17/0293

  with ring member to support retractor elements · CPC title