Spinous process fixation system and methods thereof

Patent metadata

Field	Value
Publication number	US-9539032-B2
Application number	US-201614989919-A
Country	US
Kind code	B2
Filing date	Jan 7, 2016
Priority date	Nov 26, 2013
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An implantable device may be provided. The implantable device may comprise an upper assembly comprising a ramped base and a pair of opposing windows. The pair of opposing windows may extend upward from either lateral side of the ramped base. A gripping assembly may be disposed in each window. The implantable device may further comprise a lower assembly comprising a ramped base and a pair of opposing windows. The pair of opposing windows may extend down from either lateral side of the ramped base. A gripping assembly is disposed in each window. The implantable device may further comprise a ramped actuator assembly disposed between the upper assembly and the lower assembly. The ramped actuator may be configured to transition the implantable device from a collapsed form having a first height to an expanded form having a second height and wherein the second height is greater than the first height.

First claim

What is claimed is:

1. A surgical method comprising:
inserting an implantable device into an interspinous space, wherein the implantable device is in a collapsed form having a first height; and
expanding the implantable device in the interspinous space, wherein the implantable device is expanded to an expanded form having a second height,
wherein the implantable device comprises:
an upper assembly including a pair of upwardly facing extensions;
a lower assembly including a pair of downwardly facing extensions; and
an actuation assembly positioned between the upper assembly and the lower assembly for changing a distance of separation between the upper assembly and the lower assembly, wherein the actuation assembly comprises a first ramped actuator, a second ramped actuator and a central screw, wherein rotation of the central screw draws the first ramped actuator toward the second ramped actuator, thereby causing expansion of the implantable device.

2. The method of claim 1 , wherein the first ramped actuator is a front ramped actuator and the second ramped actuator is a rear ramped actuator.

3. The method of claim 2 , wherein the upper assembly comprises a first angled wedge and a second angled wedge, wherein the first angled wedge engages the front ramped actuator and the second angled wedge engages the rear ramped actuator.

4. The method of claim 3 , wherein the first angled wedge and the second angled wedge slope in opposite directions.

5. The method of claim 3 , wherein the first angled wedge comprises a first groove and the second angled wedge comprises a second groove.

6. The method of claim 3 , wherein a first dovetail connection is formed between the first angled wedge and the front ramped actuator and a second dovetail connection is formed between the second angled wedge and the rear ramped actuator.

7. The method of claim 1 , wherein at least one spike extends from the upper assembly into an upper spinous process member and at least one spike extends from the lower assembly into a lower spinous process member.

8. A surgical method comprising:
inserting an implantable device into an interspinous space, wherein the implantable device is in a collapsed form having a first height; and
expanding the implantable device in the interspinous space, wherein the implantable device is expanded to an expanded form having a second height,
wherein the implantable device comprises:
an upper assembly including a pair of upwardly facing extensions;
a lower assembly including a pair of downwardly facing extensions;
an actuation assembly positioned between the upper assembly and the lower assembly for changing a distance of separation between the upper assembly and the lower assembly, wherein the actuation assembly comprises a first ramped actuator, a second ramped actuator and a central screw, wherein rotation of the central screw draws the first ramped actuator toward the second ramped actuator, thereby causing expansion of the implantable device;
a first spike plate assembly inserted through at least one of the upwardly facing extensions; and
a second spike plate assembly inserted through at least one of the downwardly facing extensions.

9. The method of claim 8 , wherein the upper assembly comprises a first angled wedge and the lower assembly comprises a second angled wedge.

10. The method of claim 9 , wherein the first angled wedge comprises a first groove and the second angled wedge comprises a second groove.

11. The method of claim 10 , wherein each of the first angled wedge and the second angled wedge are configured to engage the first ramped actuator.

12. The method of claim 11 , wherein each of the first angled wedge and the second angled wedge form a dovetail connection with the first ramped actuator.

13. The method of claim 8 , wherein the upper assembly comprises a first window for receiving the first plate assembly therethrough and the lower assembly comprises a second window for receiving the second plate assembly therethrough.

14. The method of claim 13 , wherein the first window further receives a first telescoping subassembly therethrough and the second window further receives a second telescoping subassembly therethrough.

15. The method of claim 8 , wherein the first spike plate assembly is inserted through a first window in at least one of the upwardly facing extensions and the second spike plate assembly is inserted through a second window in at least one of the downwardly facing extensions.

Assignees

• Globus Medical Inc

Inventors

• Zappacosta Jason
• Ingalhalikar Aditya
• Reed Don
• Rightler Robert
• Clutter Darren

Classifications

• Y10T29/49826

  Assembling or joining · CPC title

• A61B2017/00991

  Telescopic means · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61B17/7068 Primary

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

• A61B17/7067 Primary

  Devices bearing against one or more spinous processes and also attached to another part of the spine; Tools therefor · CPC title