Surgical Instrumentation and Method for Treatment of a Spinal Structure

• US 20100076445A1
• Filed: 12/01/2009
• Published: 03/25/2010
• Est. Priority Date: 02/12/2004
• Status: Abandoned Application

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Pagano, Paul J.
• Application Number:
  US12/628,973
• Publication Number:
  US 20100076445A1
• Time in Patent Office: Days
• US Class Current: 606/94
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 17/3472 for bones, e.g. intraosseus injections
• 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 17/8858 laterally or radially expansible inflatable A61B17/8855
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/0801 Prevention of accidental cutting or pricking

Abstract

Instrumentation and method for treatment of a spinal structure, comprising an elongate member including a deformable distal portion having an initial configuration for placement within the spinal structure and a deformed configuration wherein the distal portion is outwardly deformed to form a cavity in the spinal structure. The elongate member comprises a cannula member and an actuator member that is removably positioned within the cannula member and configured to transition the deformable distal portion from the initial configuration toward the deformed configuration. The actuator member is selectively removed from the cannula member to provide a passageway for delivery of a material into the cavity formed in the spinal structure.

Claims

1. Instrumentation for treatment of the spine, comprising:

an elongate member extending along a longitudinal axis and including a flexible and elastically deformable distal portion having an initial configuration for placement within a vertebral body and an elastically deformed configuration wherein said distal portion is outwardly deformed, said elongate member comprising a cannula member and an actuator member, said cannula member sized to extend into a vertebral body of the spine, said actuator member being removably positioned within said cannula member and configured to transition said deformable distal portion from said initial configuration toward said elastically deformed configuration by imposition of an axial compression force onto said deformable distal portion, said actuator member being selectively removed from said cannula member to provide a passageway for delivery of a material into the vertebral body.

2. The instrumentation of claim 1, wherein said cannula member includes a distal end portion and wherein the distal end portion extends distally beyond the deformable distal portion in the elastically deformed configuration.

3. The instrumentation of claim 1 wherein the a cannula member includes a pointed tip.

4. The instrumentation of claim 1, further comprising a retaining element adapted to selectively prevent transitioning of said deformable distal portion from said initial configuration toward said deformed configuration.

5. The instrumentation of claim 1, wherein said material comprises a flowable material.

6. The instrumentation of claim 5, wherein said material comprises a settable material providing internal support to the cavity formed in the vertebral body.

7. The instrumentation of claim 6, wherein said material comprises bone cement.

8. The instrumentation of claim 5, wherein said elongate member includes a connector portion defining a passage in communication with said passageway in said cannula member, said connector portion adapted for coupling with a material delivery system to inject said flowable material through said passageway in said cannula member and into the cavity in the vertebral body.

9. The instrumentation of claim 8, wherein said connector portion comprises a luer-type fitting.

10. The instrumentation of claim 8, wherein said connector portion comprises a threaded fitting adapted for threading engagement with said material delivery system.

11. The instrumentation of claim 1, wherein said axial compression force is provided by axial displacement of said actuator member relative to said deformable distal portion.

12. The instrumentation of claim 1, wherein said imposition of said axial compression force onto said deformable distal portion results in axial compression of said deformable distal portion to outwardly buckle said deformable distal portion toward said elastically deformed configuration.

13. Instrumentation for treatment of the spine, comprising:

an elongate member extending along a longitudinal axis and including a deformable distal portion having an initial configuration for placement within a vertebral body of the spine and a deformed configuration wherein said distal portion is outwardly deformed, said elongate member comprising a cannula member and an actuator member, said cannula member sized to extend into the vertebral body, said actuator member being removably positioned within said cannula member and configured to transition said deformable distal portion from said initial configuration toward said deformed configuration, said actuator member being selectively removed from said cannula member to provide a passageway for delivery of a material into the vertebral body; and

wherein relative displacement between said actuator member and said cannula member results in axial compression of said deformable distal end portion to transition said deformable distal end portion toward said deformed configuration.

14. The instrumentation of claim 13, further comprising an actuator mechanism coupled between said actuator member and said cannula member to regulate said relative displacement therebetween and to generate a controlled magnitude of force against the vertebral body.

15. The instrumentation of claim 13, further comprising a retaining element engaged between said actuator member and said cannula member to selectively prevent said relative displacement and transitioning of said deformable distal portion from said initial configuration toward said deformed configuration;

and

wherein disengagement of said retaining element from between said actuator member and said cannula member permits said relative linear displacement and transitioning of said deformable distal portion from said initial configuration toward said deformed configuration.

16. Instrumentation for treatment of the spine, comprising:

an actuator member extending along a longitudinal axis and including a flexible and elastically deformable distal portion having an initial configuration for insertion into a vertebral bone of the spine and a mechanically and elastically deformed configuration;

means for defining through passage in the vertebral bone for receipt of the actuator member;

means for mechanically deforming said distal portion from said initial configuration toward said mechanically and elastically deformed configuration by imposition of an axial compression force onto said deformable distal portion; and

means for delivering a material into the vertebral body through the means for defining through passage.

17. The instrumentation of claim 16, further comprising means for selectively preventing transitioning of the deformable distal portion from the initial configuration toward the mechanically deformed configuration.

18. The instrumentation of claim 16, further comprising means for selectively controlling said imposition of said axial compression force onto said deformable distal portion to generate a controlled magnitude of force against the vertebral bone.

19. The instrumentation of claim 16, wherein said axial compression force is provided by relative axial displacement of said deformable distal portion.

20. The instrumentation of claim 16, further comprising means for coupling said means for delivering to said means for defining through passage.