Device and method for treatment or evacuation of intervertebral disc or vertebral body

• US 8,500,742 B2
• Filed: 05/19/2011
• Issued: 08/06/2013
• 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): Hammond, Ellen C
• Assistant Examiner(s): BRAY, STUART SAMUEL
• Application Number:
  US13/111,601
• Publication Number:
  US 20110224741A1
• Time in Patent Office: 810 Days
• Field of Search: 606/86.A, 606/279, 606/13, 606/27, 606/32, 606/41, 604/164.01
• US Class Current: 606/86.A
• 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 S-shaped elongated tool in an intervertebral disc or a vertebral body. The S-shaped elongated tool has shape memory properties and retains its predetermined arcuate shape when no pressure or force is applied to it.

Claims

1. A percutaneous method of treatment of an interior of a mammalian vertebral body, comprising the steps of:

a) forming an opening through a wall of a mammalian vertebral body;

b) advancing a cannula through said opening in said wall of the mammalian vertebral body, wherein said cannula extends into the interior of the mammalian vertebral body;

c) with said cannula in position in said opening of said mammalian vertebral body, engaging said cannula with an elongated tool formed of a shape memory material and comprising a preformed S-shape, and advancing said elongated tool along said cannula, wherein said preformed S-shape of said elongated tool is deformed by said cannula while said preformed S-shape engages said cannula;

d) continuing to advance said elongated tool along said cannula until a portion of said elongated tool comprising said preformed S-shape exits said cannula into the interior of the mammalian vertebral body, whereupon the preformed S-shape of said elongated tool assumes said preformed S-shape as said elongated tool exits said cannula in the interior of the mammalian vertebral body;

e) positioning said elongated tool as desired within the interior of the mammalian vertebral body by advancing and retracting said elongated tool relative to said cannula and advancing and retracting said cannula relative to a wall of said vertebral body;

e) performing a procedure using said elongated tool; and

f) withdrawing said elongated tool from the interior of the mammalian vertebral body.

2. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 1, wherein the preformed S-shape of said elongated tool comprises two separate and distinct arcs.

3. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises placement of materials within the mammalian vertebral body.

4. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises removal of mammalian vertebral body tissue.

5. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the elongated tool is advanced through a sheath, wherein said preformed S-shape of said elongated tool is deformed by said sheath while said preformed S-shape engages said sheath, and the elongated tool is advanced through the sheath until a portion of the elongated tool comprising said preformed S-shape exits the sheath into the interior of the mammalian vertebral body, whereupon the preformed S-shape of said elongated tool assumes said preformed S-shape.

6. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the method is performed using a trans-pedicular approach to the mammalian vertebral body.

7. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the method is performed using an extrapedicular approach to the mammalian vertebral body.

8. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises placement of materials within the mammalian vertebral body by vertebroplasty.

9. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises expansion of the mammalian vertebral body.

10. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises expansion of the mammalian vertebral body by kyphoplasty.

11. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool further comprises the step of rotating the elongated tool substantially 180 degrees within the cannula.

12. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises placement of filler within the mammalian vertebral body.

13. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises placement of bone cement within the mammalian vertebral body.

14. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises removal of material from the mammalian vertebral body and placement of spacers where the material is removed.

15. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the procedure performed using the elongated tool comprises placement of regenerative material within the mammalian vertebral body.

16. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein said cannula comprises a lumen, and where said elongated tool is transported into the interior of the mammalian vertebral body through said lumen.

17. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 2, wherein the elongated tool comprises a catheter.

18. A percutaneous method of treatment of an interior of a mammalian vertebral body as described in claim 1, wherein said cannula comprises a lumen, and where said elongated tool is transported into the interior of the mammalian vertebral body through said lumen.