Percutaneous spine distraction implant systems and methods

• US 20050165398A1
• Filed: 01/24/2005
• Published: 07/28/2005
• Est. Priority Date: 01/26/2004
• Status: Abandoned Application

• Current Assignee: Mark A. Reiley
• Original Assignee: Mark A. Reiley
• Inventors: Reiley, Mark A.
• Application Number:
  US11/041,570
• Publication Number:
  US 20050165398A1
• Time in Patent Office: Days
• US Class Current: 606/86.A
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/7062 Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs rib fixation devices A61B17/8076; Tools for such devices
• CPC Class Codes: A61B 17/7065 Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/0256 for the spine

Abstract

Systems and methods for treating spinal stenosis insert a guide element percutaneously into proximity with the adjacent spinous processes. The systems and methods direct an implant device over the guide element to a position resting between the adjacent spinous processes. The device is sized and configured to distend the adjacent spinous processes. The implant device itself can be variously constructed. It can, e.g., possess threaded lands and/or a notched region in which a spinous process can rest. The implant device has a lumen to accommodate passage of the guide element, so that the device can be passed percutaneously over the guide element for implantation between adjacent spinous processes.

Claims

1. An implant device for distending adjacent spinous processes comprising

a body sized and configured to rest between and distend the adjacent spinous processes, the body including inclined planes that taper from a superior surface to an inferior surface in an anterior-to-posterior direction.

2. A device according to claim 1, further including

a lumen in the body sized and configured to accommodate passage of a percutaneous guide element.

3. A device according to claim 1

wherein the inclined planes define a region that is sized and configured to receive a spinous process.

4. A device according to claim 3

wherein the region has a taper angle in the range of 4-25°

.

5. A device according to claim 3

wherein the region includes a surface sized and configured to frictionally engage bone.

6. A device according to claim 1

wherein the body is made of at least one selected prosthetic material.

7. A device according to claim 6

wherein the selected prosthetic material includes polyethylene, rubber, tantalum, titanium, chrome cobalt;

surgical steel, bony in-growth material, ceramic, artificial bone, or a combination thereof.

8. A device according to claim 1, further including

a tool sized and configured to engage the device and urge the device into a position resting between the adjacent spinous processes, the tool including a lumen accommodating passage of a guide element.

9. A device according to claim 1

wherein the body comprises a hinge mechanism and first and second arms coupled to the hinge mechanism which define an angle of taper.

10. A device according to claim 9

wherein the arms have a contracted condition permitting insertion of the device between adjacent spinous processes and an enlarged condition which distends the adjacent spinous processes.

11. A device according to claim 10

wherein the arms define an angle of taper selectively adjustable between 4-25°

.

12. A device according to claim 10, further comprising

means for moving the arms from the contracted position to the enlarged condition to increase the angle of taper.

13. A device according to claim 10, further comprising

a fixation member which engages a fixation member receiver to move the arms from the contracted position to the enlarged condition to increase the angle of taper.

14. A device according to claim 10, further comprising

a bladder adapted to receive an enlarging medium which enlarges the bladder to move the arms from the contracted position to the enlarged condition to increase the angle of taper.

15. A device according to claim 14

wherein the enlarging medium is bone cement.

16. A method for treating spinal stenosis comprising

directing a device as defined in claim 1 to a position resting between the adjacent spinous processes, the device being sized and configured to distend the adjacent spinous processes.