METHOD AND APPARATUS FOR MANIPULATING MATERIAL IN THE SPINE

• US 20110060369A1
• Filed: 08/27/2010
• Published: 03/10/2011
• Est. Priority Date: 10/23/2003
• Status: Active Grant

• Current Assignee: Mis Ip Holdings LLC
• Original Assignee: TranS1 Incorporated (Baxano Surgical, Inc.)
• Inventors: Assell, Robert L., Arthurs, Brandon, Ainsworth, Stephen D.
• Granted Patent: US 8,308,777 B2
• Time in Patent Office: Days
• US Class Current: 606/279
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1697 specially adapted for wire insertion
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/7074 Tools specially adapted for spinal fixation operations other than for bone removal or filler handling A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39
• CPC Class Codes: A61B 17/8615 at the central region of the screw head
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/8888 at its central region
• CPC Class Codes: A61B 17/8897 Guide wires or guide pins
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22044 with a pointed tip
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element

Abstract

Disclosed are surgical tools, tool sets and methods for percutaneously accessing and preparing treatment sites within the spine for subsequent treatment procedures. The treatment site may be an inter-vertebral motion segments in the lumbar and sacral regions of the spine. The tool set may comprise introducer tools and bone dilators for accessing and tapping into a targeted site, such as, for example, the anterior surface of the S1 vertebral body. The tool set may also comprise cutters and extractors for preparing the treatment site for subsequent treatment procedures. The tool set may additionally comprise a bone graft inserter, an exchange system, and/or a temporary distraction tool for further preparing the treatment site for subsequent treatment procedures.

Claims

1. An axially-extending implantable rod for extending between at least two adjacent vertebral bodies in a spine, said rod comprising:

a distal portion;

a proximal portion;

an external surface extending between the distal portion and the proximal portion, the external surface including external threading extending in a first direction around a longitudinal axis of the rod along at least a portion of the external surface; and

an internal bore extending from the proximal portion at least partially through the rod, the internal bore including a threaded section with threading that extends around the longitudinal axis in a second direction that is opposite to the first direction, the internal bore further comprising a driver engagement section that has a non-circular cross-section.

2. The rod of claim 1, further comprising a driver configured for engagement with the driver engagement section of the internal bore.

3. The rod of claim 2, wherein the external threading is configured for implanting the rod in a first adjacent vertebral body when the driver rotated in the first direction.

4. The rod of claim 2, wherein the external threading is configured for withdrawing the rod from a first adjacent vertebral body when the driver rotated in the second direction.

5. The rod of claim 1, further comprising a releasable engagement structure configured for alignment between the drive member and the spinal implant.

6. The rod of claim 5, wherein the releasable engagement structure comprises one or more holes.

7. The rod of claim 1, further comprising a releasable engagement structure configured for alignment between the drive member and the spinal implant.

8. A method of implanting and removing a spinal implant extending trans-axially between at least two adjacent vertebral bodies in a spine, the method comprising

engaging a drive member with a non-circular cross-section with a corresponding non-circular portion of an internal bore of a spinal implant;

rotating the drive member and the spinal implant in a first direction to advance the spinal implant trans-axially into at least one vertebral body;

disengaging the drive member from the spinal implant;

engaging a threaded member with a threaded portion of the internal bore of the spinal implant by rotating the threaded member in a second direction that is opposite the first direction;

continuing to rotate the threaded member in the second direction to rotate the spinal implant in the second direction; and

withdrawing the spinal implant from the least one vertebral body.

9. The method of claim 8, wherein the engaging the non-circular cross-section comprises interfacing at least three corresponding longitudinally extending surfaces between the drive member and the internal bore of the spinal implant.

10. The method of claim 8, further comprising aligning a releasable engagement structure between the drive member and the spinal implant.

11. A method of implanting and removing a spinal implant comprising a first section and a second section, the method comprising

advancing the first and second sections of the spinal implant into a spine;

using a tip of an extraction member to engage and withdraw the first section of the spinal implant from the spine; and

using the tip of the extraction member to engage and withdraw the second section of the spinal implant from the spine.

12. The method of claim 11, wherein the tip of the extraction member releasably engages the first section of the spinal implant.

13. The method of claim 11, wherein the tip of the extraction member releasably engages the second section of the spinal implant.

14. The method of claim 11, wherein the tip of the extraction member comprises a thread configured to complement and releasably engage at least one of the first and the second sections of the spinal implant.

15. The method of claim 11, wherein the tip of the extraction member comprises a non-circular longitudinally extending structure configured to complement and releasably engage at least one of the first and the second sections of the spinal implant.

16. The method of claim 11, wherein the tip of the extraction member is configured to engage at least one of the first and the second sections of the spinal implant with the spine through rotation in a first direction.

17. The method of claim 16, wherein the tip of the extraction member is configured to withdraw at least one of the first and the second sections of the spinal implant with the spine through rotation in a second direction, the second direction opposite the first direction.

18. The method of claim 11, wherein the tip of the extraction member is configured to engage both the first and the second sections of the spinal implant with the spine.

19. The method of claim 11, wherein the tip of the extraction member is configured to withdraw both the first and the second sections of the spinal implant from the spine.