Device and method for treatment of intervertebral disc disruption

• US 7,322,962 B2
• Filed: 04/23/2005
• Issued: 01/29/2008
• Est. Priority Date: 04/23/2004
• Status: Active Grant

• Current Assignee: Leonard Edward Forrest
• Original Assignee: Leonard Edward Forrest
• Inventors: Forrest, Leonard Edward
• Primary Examiner(s): Lucchesi; Nicholas D.
• Assistant Examiner(s): BOUCHELLE, LAURA A
• Application Number:
  US11/112,475
• Publication Number:
  US 20050240171A1
• Time in Patent Office: 1,011 Days
• Field of Search: 604/164.01
• US Class Current: 604/164.01
• CPC Class Codes: A61B 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• CPC Class Codes: A61B 17/8816 characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/00238 Type of minimally invasive operation A61B2017/00805 takes precedence
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/00831 Material properties
• CPC Class Codes: A61B 2018/0044 Spinal cord
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455

Abstract

A method of positioning an arcuate catheter against an inner annular wall of the disc, and particularly on the posterior and postero-lateral portions of the inner annulus of the disc, by arthroscopy is presented. The arcuate catheter retains its predetermined arcuate shape when no pressure or force is applied to the catheter. This present device and method require no forward tip pressure on the inner annular wall of a mammalian intervertebral disc. An arcuate sheath having a cutter is used to remove tissue from the inner annulus of the disc. In another embodiment an arcuate sheath is used to progressively remove material from the interior of the mammalian intervertebral disc. In yet another embodiment, an arcuate sheath and catheter are used to remove the entire intervertebral disc and place supports to maintain a disc space.

Claims

1. A method of treatment of the interior of a mammalian intervertebral disc, comprising the steps of:

a) forming an opening through a posterior wall of a mammalian intervertebral disc;

b) advancing a sheath having a preformed S-shape through said opening in the posterior wall of the mammalian intervertebral disc, wherein said sheath extends into the interior of the mammalian intervertebral disc;

c) advancing an elongated tool through a lumen in said sheath until a least a portion of said elongated tool is advanced out of said sheath and into the interior of the mammalian intervertebral disc;

d) performing a process on the interior of the mammalian intervertebral disc using said tool; and

e) withdrawing said sheath and said tool from the interior of the mammalian intervertebral disc.

8. A method of treatment of an interior of a mammalian intervertebral disc as described in claim 1, wherein the opening in the posterior wall of the mammalian intervertebral disc is formed by a process comprising the steps of:

piercing tissue adjacent to the mammalian intervertebral disc and forming an opening in the tissue,

identifying a nerve root that is adjacent to the opening in the tissue;

inserting a retractor through an introducer that is present in the opening in the tissue, and lifting a nerve root over said introducer; and

removing said retractor from said introducer, and inserting a tool into said introducer for forming an opening in the posterior wall of the mammalian intervertebral disc.

10. A method of treatment of an interior of a mammalian intervertebral disc as described in claim 1, wherein a guide introducer extends through said opening in the posterior wall of the mammalian intervertebral disc, and wherein said sheath is transported along said guide introducer into the interior of the mammalian intervertebral disc, and wherein the preformed S-shape of said sheath is deformed by said guide introducer when said sheath is transported by said guide introducer to the interior of the mammalian intervertebral disc, and wherein said sheath regains said preformed S-shape upon exit from said guide introducer.

11. A method of treatment of an interior of a mammalian intervertebral disc as described in claim 10, wherein said sheath is progressively advanced from said guide introducer as said process is performed by said elongated tool on the interior of the mammalian intervertebral disc.

13. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 10, wherein a distal end of said elongated tool is selectively positioned at different points on said wall of the interior of the mammalian intervertebral disc as said process is performed by said elongated tool, by combining selective advancement and retraction of said introducer guide within said interior of the mammalian intervertebral disc with selective advancement and retraction of said sheath from a distal end of said guide introducer.

2. A method of treatment of the interior of a mammalian intervertebral disc, comprising the steps of:

a) forming an opening through a posterior wall of a mammalian intervertebral disc;

b) advancing a guide introducer through said opening in said posterior wall of the mammalian intervertebral disc, wherein said guide introducer extends into the interior of the mammalian intervertebral disc;

c) advancing a sheath having a preformed compound arcuate shape at a distal end thereof through said opening in the posterior wall of the mammalian intervertebral disc using said introducer, wherein said sheath is transported by said introducer and said sheath extends into the interior of the mammalian intervertebral disc;

d) advancing an elongated tool through a lumen in said sheath until a least a portion of said elongated tool is advanced out of said sheath, and positioning said elongated tool as desired in the interior of the mammalian intervertebral disc by variably advancing and retracting said guide introducer within the interior of the mammalian intervertebral disc and variably advancing and retracting said sheath relative to said introducer; and

e) withdrawing said sheath and said tool from the interior of the mammalian intervertebral disc.

3. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, comprising the further steps of:

advancing a distal end of said sheath to a position that is near a lateral wall of the mammalian intervertebral disc and opposite said opening is the posterior wall of the mammalian intervertebral disc;

advancing at least a portion said sheath through and beyond a distal end of said introducer and advancing at least a portion of said elongated tool through and beyond a distal end of said lumen of said sheath and into the interior of the mammalian intervertebral disc;

retracting said sheath and said guide introducer while maintaining said elongated tool in a substantially static position relative to said distal end of said lumen of said sheath, whereupon said elongated tool minimizes tissue in the interior of the mammalian intervertebral disc;

again advancing said distal end of said sheath to a position that is near the lateral wall of the mammalian intervertebral disc and opposite said opening is the posterior wall of the mammalian intervertebral disc;

advancing a further portion of said sheath beyond said distal end of said guide introducer; and

again retracting said introducer and said lumen while maintaining said elongated tool in a substantially static position relative to said distal end of said lumen of said sheath, whereupon said elongated tool minimizes tissue in the interior of the mammalian intervertebral disc.

5. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises a preformed compound curve shape near a distal end thereof.

6. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises multiple preformed compound curves near a distal end thereof.

7. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises a preformed S-shape near a distal end thereof.

9. A method of treatment of an interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises a deformable locator tip that extends beyond a distal end of said sheath, wherein said deformable locator tip is visible under a fluoroscope, and wherein said method comprises the further steps of:

defining a limit of advancement of said sheath by advancing a distal end of said sheath to a position that is near a lateral wall of the interior of the mammalian intervertebral disc and opposite said opening is said posterior wall until said deformable locator tip visibly deforms due to contact of the deformable locator tip with said lateral wall of the interior of the mammalian intervertebral disc.

12. A method of treatment of an interior of a mammalian intervertebral disc as described in claim 3, wherein elongated tool is retracted relative to said distal end of said lumen of said sheath, and said sheath and said catheter are rotated about their axes, and said distal end of said lumen of said sheath is advanced to a position that is near a lateral wall of the mammalian intervertebral disc, and subsequently retracting said sheath while maintaining said elongated tool in a substantially static position relative to said distal end of said lumen of said sheath, whereupon said elongated tool minimizes tissue in an interior of the mammalian intervertebral disc.

14. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises at least two lumens that longitudinally traverse a length of said sheath.

15. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises at least two lumens that longitudinally traverse a length of said sheath, and wherein a pressure change is delivered to the interior of the mammalian intervertebral disc through at least one of said at least two lumens of said sheath, and wherein a material is transported through said at least one of said at least two lumens of said sheath by said pressure change.

16. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool comprises a cutter.

17. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool comprises a device for emitting radio frequency.

18. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool comprises a device for emitting heat.

19. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool comprises forceps.

20. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises at least three lumens that longitudinally traverse a length of said sheath.

21. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said sheath comprises at least three lumens that longitudinally traverse a length of said sheath, and wherein materials are delivered to the interior of the mammalian intervertebral disc through at least one of the at least three lumens, and materials are withdrawn from the interior of the mammalian intervertebral disc through at least one of the at least three lumens.

22. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool comprises fiber optic cable.

38. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said guide introducer is substantially straight and forms said sheath as straight as said sheath is transported by said guide introducer.

39. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said guide introducer comprises a substantially straight lumen that forms said sheath as straight as said sheath is transported by said guide introducer.

42. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said elongated tool minimizes contents of the interior of the mammalian intervertebral disc.

43. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein said tool therapeutically treats the interior of the mammalian intervertebral disc.

44. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, further comprising the step of positioning spacers within the interior of the mammalian intervertebral disc by a second elongated tool that is transported and positioned by said sheath.

45. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, further comprising the step of sealing said opening after said sheath and said tool are withdrawn from the interior of the mammalian intervertebral disc.

48. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 3, wherein said elongated tool comprises a cutter.

55. A method of treatment of the interior of a mammalian intervertebral disc as described in claim 2, wherein the method is used to reach all areas of the interior of the mammalian intervertebral disc.

4. A method of treatment of the interior of a mammalian intervertebral disc, comprising the steps of:

a) forming an opening through a posterior wall of a mammalian intervertebral disc;

b) advancing an introducer through said opening in said posterior wall of the mammalian intervertebral disc, wherein said introducer extends into the interior of the mammalian intervertebral disc;

c) advancing a sheath through said opening in the posterior wall of the mammalian intervertebral disc using said introducer, wherein said sheath extends into the interior of the mammalian intervertebral disc;

d) advancing an elongated tool having a preformed S-shape through a lumen in said sheath until a least a portion of said elongated tool is advanced out of said sheath and into the interior of the mammalian intervertebral intervertebral disc, and positioning said elongated tool as desired within the interior of the mammalian intervertebral disc by variably advancing and retracting said sheath within the interior of the mammalian intervertebral disc and variably advancing and retracting said elongated tool relative to said sheath; and

e) withdrawing said sheath and said tool from the interior of the mammalian intervertebral disc.

23. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc, comprising:

a) a guide introducer that traverses an opening in the mammalian intervertebral disc;

b) a sheath having a preformed S-shape, wherein said sheath is transported into the interior of the mammalian intervertebral disc by said guide introducer, and said sheath is deformable and is deformed by said guide introducer as said sheath is transported, and said sheath regains its preformed S-shape upon exiting said guide introducer; and

c) an elongated tool that traverses an interior lumen of said sheath, wherein at least a portion of said elongated tool extends from said sheath opposite said introducer and within the interior of the mammalian intervertebral disc.

24. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said guide introducer comprises a lumen, and wherein said sheath is transported through said lumen and into the interior of the mammalian intervertebral disc, wherein said sheath is deformed by said lumen, and wherein said sheath progressively regains its preformed S-shape upon exiting said lumen.

25. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises a deformable locator tip that extends beyond a distal end of said sheath, wherein said deformable locator tip is visible under a fluoroscope.

26. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises a cutter.

27. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises at least two lumens that longitudinally traverse a length of said sheath.

28. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises at least two lumens that longitudinally traverse a length of said sheath, and wherein material is transported through at least one of said at least two lumens of said sheath.

29. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises means for separating tissue from said disc.

30. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises a device for emitting radio frequency.

31. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises a device for emitting heat.

32. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises forceps.

33. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises at least three lumens that longitudinally traverse a length of said sheath.

34. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises at least three lumens that longitudinally traverse a length of said sheath, and wherein materials are delivered to the interior of the mammalian intervertebral disc through at least one of the at least three lumens, and materials are withdrawn from the interior of the mammalian intervertebral disc through at least one of the at least three lumens.

35. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises fiber optic cable.

36. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises means for removing tissue from the interior of the mammalian intervertebral disc.

37. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said lumen of said sheath opens at a distal end of said sheath, and wherein said elongated tool extends from and beyond said distal end of said sheath.

40. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said guide introducer is substantially straight and forms at least a portion of said sheath as straight as said sheath is transported by said guide introducer.

41. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said guide introducer comprises a substantially straight lumen that forms said sheath as straight as said sheath is transported by said guide introducer.

46. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said tool therapeutically treats the interior of the mammalian intervertebral disc.

47. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said tool minimizes contents of the interior of the mammalian intervertebral disc.

49. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said sheath comprises a side portal.

50. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said elongated tool comprises means for positioning spacers in the interior of the mammalian intervertebral disc.

51. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 50, further comprising spacers that are positioned in the interior of the mammalian intervertebral disc.

52. A device for use in treatment or evacuation of the interior of a mammalian intervertebral disc as described in claim 23, wherein said guide introducer is a percutaneous guide introducer.

53. A method of treatment of the interior of a mammalian intervertebral disc, comprising the steps of:

a) forming an opening through a posterior wall of a mammalian intervertebral disc;

b) positioning a lumen through said opening in said posterior wall of said mammalian intervertebral disc, wherein said lumen extends from an exterior of said posterior wall through said opening and into the interior of said mammalian intervertebral disc;

c) advancing a catheter through said lumen and into said interior of said mammalian intervertebral disc;

d) continuing to advance said catheter until said catheter contacts a lateral wall of said mammalian intervertebral disc, and thereafter, maintaining a distal end of said catheter in substantially a static position relative to said lateral wall of said mammalian intervertebral disc, while continuing to advance said catheter into an interior of said mammalian intervertebral disc until a length of said catheter having a preformed arcuate shape approximating a shape of a lateral posterior wall of said mammalian intervertebral disc is positioned against a lateral posterior wall of said mammalian intervertebral disc;

e) performing a therapeutic process on said interior of said mammalian intervertebral disc with said catheter; and

f) withdrawing said catheter from the interior of said mammalian intervertebral disc through said lumen.

54. A method of treatment of the interior of a mammalian intervertebral disc, comprising the steps of:

a) forming a opening through a posterior wall of the mammalian intervertebral disc;

b) positioning a lumen through said opening in said posterior wall of said mammalian intervertebral disc, wherein said lumen extends from an exterior of said posterior wall through said opening and into the interior of said mammalian intervertebral disc;

c) advancing a distal end of said lumen to a position that is near a lateral wall of said mammalian intervertebral disc opposite said opening in said posterior wall;

d) advancing a catheter through said lumen and into said interior of said mammalian intervertebral disc;

e) continuing to advance said catheter until said catheter contacts a lateral wall of said mammalian intervertebral disc;

f) retracting said distal end of said lumen to a position that is near said opening in said posterior wall, and thereafter, maintaining a distal end of said catheter in a substantially static position relative to said lateral wall of said mammalian intervertebral disc while continuing to advance said catheter into an interior of said mammalian intervertebral disc until a length of said catheter having a preformed arcuate shape approximating a shape of a lateral posterior wall of said mammalian intervertebral disc is positioned against a lateral posterior wall of said mammalian intervertebral disc;

g) performing a therapeutic process on said interior of said mammalian intervertebral disc with said catheter; and

h) withdrawing said catheter from the interior of said mammalian intervertebral disc through said lumen.