Spinous process fixation system and methods thereof

Patent metadata

Field	Value
Publication number	US-11813175-B2
Application number	US-202117483149-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Dec 31, 2012
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

An implantable device includes a barrel. The barrel has a first portion and a second portion. The implantable device includes a first plate having multiple projections extending from one side of the first plate, where the first plate is configured to movably couple to the first portion of the barrel. The implantable device includes a second plate having multiple projections extending from one side of the second plate, where the second plate is configured to movably couple to the second portion of the barrel. The barrel is configured to transition from a collapsed form having a first height to an expanded form having a second height, where the second height is greater than the first height.

First claim

What is claimed is:

1. A method of surgically stabilizing adjacent vertebral bodies, said method comprising:
providing an implantable device, the implantable device including:
a barrel having a longitudinal axis;
a first plate having multiple projections extending from the first plate and configured to engage a spinous process of the adjacent vertebral bodies, the first plate configured to movably couple to the barrel; and
a second plate having multiple projections extending from the second plate and configured to be engage the spinous process of the adjacent vertebral bodies, the second plate configured to movably couple to the barrel,
wherein the barrel is configured to transition from a collapsed form having a first height to an expanded form having a second height, wherein the barrel comprises a first endplate, a second endplate, an actuator positioned between the first endplate and the second endplate, wherein the actuator includes a first ramp and a second ramp for abutting one of either the first end plate or the second endplate such that driving of the actuator along the longitudinal axis causes expansion of the barrel,
wherein the first and second plates are configured to move independently of each other;

inserting the implantable device into an interspinous space between the adjacent vertebral bodies; and
expanding the barrel from the first height to the second height using the actuator in the interspinous space to provide an interspinous distraction in order to reduce a load placed on the spinous process by the first and second plates so as to reduce a chance of breaking the spinous process.

2. The method of claim 1 , wherein the second height is greater than the first height.

3. The method of claim 1 , wherein the barrel has a bulleted shape in both a lateral direction and a posterior direction.

4. The method of claim 1 , wherein the implantable device further includes a central screw threadably coupled to the actuator and configured to move the first end plate relative to the second endplate to cause expansion of the barrel upon rotation of the central screw.

5. The method of claim 1 , wherein the barrel further comprises a central screw inserted through the first ramp and the second ramp.

6. The method of claim 5 , wherein the first ramp and the second ramp are configured to act on the first endplate and the second endplate in response to a rotation of the central screw.

7. The method of claim 1 , wherein the barrel comprises a first window and a second window, the first window and the second window configured to receive graft packing material.

8. The method of claim 1 , wherein the first endplate having a shaped groove and the second endplate having a shaped groove.

9. The method of claim 1 , wherein the first plate and the second plate are each shaped in a lordotic profile.

10. The method of claim 1 , wherein the first plate comprises a bushing to enable the first plate to angulate about the bushing and the second plate comprises a bushing to enable the second plate to angulate about the bushing.

11. The method of claim 1 , wherein the first plate is locked in position using a first set screw at any position within a range of motion for the first plate and the second plate is locked in position using a second set screw at any position within a range of motion for the second plate.

12. The method of claim 11 , wherein the first set screw includes a cup-shaped end to lock the first plate in position and the second set screw includes a cup-shaped end to lock the second plate in position.

13. A method of surgically stabilizing adjacent vertebral bodies, said method comprising:
providing an implantable device, the implantable device including:
a barrel having a longitudinal axis, a first portion and a second portion;
a first plate shaped in a lordotic profile movably coupled to the barrel and configured to engage a spinous process of the adjacent vertebral bodies, wherein the first plate is capable of angulating relative to the first portion of the barrel; and
a second plate shaped in a lordotic profile movably coupled to the barrel and configured to engage the spinous process of the adjacent vertebral bodies,
wherein the second plate is capable of angulating relative to the second portion of the barrel,
wherein the barrel is configured to transition from a collapsed form having a first height to an expanded form having a second height, wherein the barrel comprises a first endplate, a second endplate, an actuator positioned between the first endplate and the second endplate, wherein the actuator includes a first ramp and a second ramp for abutting one of either the first endplate or the second endplate such that driving of the actuator along the longitudinal axis causes expansion of the barrel,
wherein the first and second plates are configured to move independently of each other,

inserting the implantable device into an interspinous space between the adjacent vertebral bodies; and
expanding a distance between the first endplate of the barrel and the second endplate of the barrel from the first height to the second height using the actuator in the interspinous space to provide an interspinous distraction in order to reduce a load placed on the spinous process by the first and second plates so as to reduce a chance of breaking the spinous process.

14. The method of claim 13 , wherein the first plate is configured to angulate up to about 25 degrees relative to the first portion and the second plate is configured to angulate up to about 25 degrees relative to the second portion.

15. The method of claim 13 , wherein the first portion and the second portion are rails that extend from a same side of the barrel.

16. The method of claim 13 , wherein the second height is greater than the first height.

17. The method of claim 13 , wherein the first plate is locked in position using a first set screw at any position within a range of motion for the first plate, the first set screw having a cup-shaped end; and the second plate is locked in position using a second set screw at any position within a range of motion for the second plate, the second set screw having a cup-shaped end.

18. The method of claim 13 , further comprising a central screw threadably coupled to the actuator and configured to move the first end plate relative to the second endplate to cause expansion of the barrel upon rotation of the central screw.

19. The method of claim 13 , wherein the barrel comprises a first window and a second window, the first window and the second window configured to receive graft packing material.

20. The method of claim 13 , wherein the first endplate having a shaped groove and the second endplate having a shaped groove.

Assignees

• Globus Medical Inc

Inventors

• Zappacosta Jason
• Reed Don
• Ingalhalikar Aditya

Classifications

• A61F2/4465 Primary

  having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine · CPC title

• A61B17/7062 Primary

  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 title

• A61B17/7065

  Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor · CPC title

• A61B17/7068

  Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor · CPC title

• A61F2002/30433

  using additional screws, bolts, dowels, rivets or washers e.g. connecting screws · CPC title