Percutaneous spinal implants and methods

• US 20060184247A1
• Filed: 10/19/2005
• Published: 08/17/2006
• Est. Priority Date: 02/17/2005
• Status: Active Grant

• Current Assignee: Kyphon SARL (Medtronic Plc)
• Original Assignee: Kyphon SARL (Medtronic Plc)
• Inventors: Edidin, Avram Allan, Malandain, Hugues F., Vandervelde, Robert Alexander
• Granted Patent: US 8,038,698 B2
• Time in Patent Office: Days
• US Class Current: 623/17.110
• CPC Class Codes: A61B 17/025 Joint distractors
• 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

An apparatus includes an elongate member having a proximal portion configured to be deformed from a first configuration to a second configuration. The elongate member has a distal portion configured to be deformed from a first configuration to a second configuration. A non-expanding central portion is positioned between the proximal portion and the distal portion. The non-expanding central portion is configured to engage adjacent spinous processes.

Claims

1. An apparatus, comprising:

an elongate member having

a proximal portion configured to be deformed from a first configuration to a second configuration to cause deformation of the proximal portion;

a distal portion configured to be deformed from a first configuration to a second configuration to cause deformation of the distal portion; and

a non-expanding central portion between the proximal portion and the distal portion, the non-expanding central portion configured to engage adjacent spinous processes.

2. The apparatus of claim 1, wherein the proximal portion, the distal portion and the central portion are monolithically formed.

3. The apparatus of claim 1, wherein the proximal portion is configured to deform to its second configuration before the distal portion deforms to its second configuration.

4. The apparatus of claim 1, wherein the proximal portion includes a first surface and a second surface that are spaced apart in the first configuration and matingly engage in the second configuration, the first surface and the second surface configured to restrict further deformation of the proximal portion once matingly engaged.

5. The apparatus of claim 1, wherein the proximal portion, the distal portion and the central portion together form a tube having a substantially constant inner diameter.

6. The apparatus of claim 1, wherein the elongated member is configured to be inserted between adjacent spinous processes percutaneously.

7. The apparatus of claim 1, wherein the proximal portion has a plurality of projections configured to extend outwardly from the elongate member in the second configuration.

8. The apparatus of claim 1, wherein the distal portion has a plurality of projections configured to extend outwardly from the elongate member in the second configuration.

9. The apparatus of claim 1, wherein the proximal portion and the distal portion each have a plurality of projections configured to extend outwardly from the elongate member in the second configuration, at least one projection from the plurality of projections being asymmetrical about an axis of the at least one projection.

10. The apparatus of claim 1, wherein the proximal portion and the distal portion deform from the first configuration to the second configuration substantially without distraction of the adjacent spinous processes.

11. The apparatus of claim 1, wherein the proximal portion and the distal portion are configured to deform from the first configuration to the second configuration under an axial load.

12. An apparatus, comprising:

an elongate member including a deformable distal portion and a deformable proximal portion, the deformable distal portion and the deformable proximal portion each having a first configuration for insertion of the elongate member between adjacent spinous processes and a second configuration defining at least two projections disposed substantially adjacent to a side of the adjacent spinous processes,

the at least two projections of the deformable distal portion and the at least two projections of the deformable proximal portion configured to substantially maintain a lateral position relative to the adjacent spinous processes.

13. The apparatus of claim 12, wherein the deformable proximal portion is configured to deform before the deformable distal portion.

14. The apparatus of claim 12, wherein the elongate member is configured to be inserted between adjacent spinous processes through an opening in a body, the opening being smaller than a diameter of the at least two projections.

15. The apparatus of claim 12, wherein the deformable proximal portion and the deformable distal portion are movable between the first configuration and the second configuration under an axially applied load.

16. An apparatus, comprising:

an elongate body including

a first deformable portion configured to be inserted through an opening in a body, the first deformable portion having a first configuration for insertion between adjacent spinous processes and a second configuration, the size of the first deformable portion in the second configuration being greater than a size of the opening;

a second deformable portion configured to be inserted through the opening in the body, the second deformable portion having a first configuration and a second configuration, the size of the second portion in the second configuration being greater than the size of the opening; and

a central portion disposed between the first deformable portion and the second deformable portion, the first deformable portion and the second deformable portion are each configured to change from the first configuration to the second configuration substantially without distracting bone.

17. The apparatus of claim 16, wherein the size of the first portion in the second configuration and the second portion in the second configuration is greater than 1 millimeter.

18. The apparatus of claim 16, wherein the central portion is non-expandable.

19. The apparatus of claim 16, wherein the first deformable portion and the second deformable portion are actuatable at different times.

20. The apparatus of claim 16, wherein the first deformable portion in the second configuration includes at least two projections disposed adjacent to a side of the adjacent spinous processes, a distance defined between a distal end of a first projection from the at least two and a distal end of a second projection from the at least two projections being greater than a space between the adjacent spinous processes.

21. The apparatus of claim 16, wherein the first deformable portion includes a plurality of slits, the plurality of slits configured to define at least two projections when the first deformable portion is in the second configuration.

22. The apparatus of claim 16, wherein the first deformable portion and the second deformable portion are mechanically actuatable.

23. The apparatus of claim 16, wherein the first deformable portion, the second deformable portion and the central portion are monolithically formed.

24. The apparatus of claim 16, wherein the first deformable portion, the second deformable portion and the central portion are physically distinct components.

25. The apparatus of claim 16, wherein the central portion is configured to be inflated.