IP Library › Granted Patent US 12,226,130
Granted Patent B2
US 12,226,130 · App. 17/522,350 · Granted Feb 18, 2025

Interspinous spacer

Inventors: Moti Altarac (Irvine, CA); Shawn Tebbe (Leixlip, IE); Joey Camia Reglos (Lake Forest, CA); Yang Cheng (Foothill Ranch, CA); Murali P. Kadaba (San Carlos, CA); Daniel H. Kim (Houston, TX)
Assignee: VertiFlex, Inc.
A61B17/7062A61B17/7065A61B2017/00004A61B2017/00557A61F2/0077
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Quick Facts
Patent No.
US 12,226,130
App. No.
17/522,350
Granted
Feb 18, 2025
Kind
B2
Abstract

An implantable spacer for placement between adjacent spinous processes in a spinal motion segment is provided. The spacer includes a body defining a longitudinal axis and passageway. A first arm and a second arm are connected to the body. Each arm has a pair of extensions and a saddle defining a U-shaped configuration for seating a spinous process therein. Each arm has a proximal earning surface and is capable of rotation with respect to the body. An actuator assembly is disposed inside the passageway and connected to the body. When advanced, a threaded shaft of the actuator assembly contacts the earning surfaces of arms to rotate them from an undeployed configuration to a deployed configuration. In the deployed configuration, the distracted adjacent spinous processes are seated in the U-shaped portion of the arms.

Claims (26)

1. A method for implanting a spacer between adjacent spinous processes, the method comprising

inserting the spacer between the adjacent spinous processes, wherein the spacer comprises a body, a first arm coupled to the body, a second arm coupled to the body, and an actuator assembly coupled to the body, wherein each of the first and second arms is configured for receiving a spinous process and comprises a proximal caming surface and a distal portion configured for receiving the spinous process; and

rotating a shaft of an actuator assembly to move an actuator of the actuator assembly to move the first and second arms from an undeployed configuration to a deployed configuration in which the first and second arms receive the adjacent spinous processes, wherein the shaft of the actuator assembly comprises at least one bearing surface maintaining contact with each of the proximal caming surfaces as the first and second arms are moved from the undeployed configuration to the deployed configuration.

2. The method of claim 1 , wherein rotating the shaft comprises rotating a spindle coupled to the shaft to rotate the shaft.

3. The method of claim 2 , wherein rotation of the spindle in one direction advances the actuator distally to engage the proximal caming surfaces and deploy the first and second arms into the deployed configuration and rotation of the spindle in an opposite direction moves the actuator proximally to permit the first and second arms to return to the undeployed configuration.

4. The method of claim 1 , wherein rotating the shaft comprises rotating the shaft until engagement of the first and second arms with a stop mechanism.

5. The method of claim 1 , wherein rotating the shaft comprises rotating the shaft to rotate the first and second arms from the undeployed configuration in which the first and second arms are substantially parallel to a longitudinal axis of the body of the spacer to the deployed configuration in which the first and second arms are approximately transverse to the longitudinal axis of the body.

6. The method of claim 1 , wherein rotating the shaft comprises rotating the shaft to rotate the first and second arms approximately 90 degrees from the undeployed configuration to the deployed configuration.

7. The method of claim 1 , wherein rotating the shaft comprises coupling a driver to the spacer to rotate the shaft using the driver.

8. The method of claim 7 , wherein coupling the driver comprises inserting a portion of the driver into notches of a spindle coupled to the shaft.

9. The method of claim 7 , wherein rotating the shaft further comprises holding the body of the spacer using an insertion instrument while rotating the shaft using the driver.

10. The method of claim 1 , further comprising coupling an insertion instrument onto the spacer for inserting the spacer between the adjacent spinous processes.

11. The method of claim 10 , wherein coupling the insertion instrument comprises inserting prongs of the insertion instrument into notches on the body of the spacer.

12. The method of claim 10 , wherein rotating the shaft comprises inserting a portion of a driver through the insertion instrument and coupling the portion of the driver to the spacer to rotate the shaft using the driver.

13. The method of claim 12 , wherein coupling the driver comprises inserting a part of the driver into notches of a spindle coupled to the shaft.

14. The method of claim 10 , further comprising separating the insertion instrument from the spacer after rotating the shaft.

15. The method of claim 1 , wherein inserting the spacer comprises inserting the spacer using a midline approach.

16. The method of claim 1 , wherein, during the inserting and the rotating, the spacer and an insertion instrument coupled to the spacer are kept directly posterior to a spine of a subject.

17. A method for implanting a spacer between adjacent spinous processes, the method comprising

inserting the spacer between the adjacent spinous processes, wherein the spacer comprises a body, a first arm coupled to the body, a second arm coupled to the body, and an actuator assembly coupled to the body, wherein each of the first and second arms is configured for receiving a spinous process and comprises a proximal caming surface; and

rotating a shaft of an actuator assembly to move an actuator of the actuator assembly to move the first and second arms from an undeployed configuration to a deployed configuration in which the first and second arms receive the adjacent spinous processes, wherein the shaft of the actuator comprises at least one bearing surface contacting at least one of the proximal caming surfaces, wherein rotating the shaft comprises rotating a spindle coupled to the shaft to rotate the shaft, wherein rotating the spindle comprises rotating the spindle to deflect a tooth of a lock from an engagement between a pair of teeth of the spindle and to reengage the tooth of the lock between another pair of teeth of the spindle.

18. A method for implanting a spacer between adjacent spinous processes, the method comprising

inserting the spacer between the adjacent spinous processes, wherein the spacer comprises a body, a first arm coupled to the body, a second arm coupled to the body, and an actuator assembly coupled to the body, wherein each of the first and second arms is configured for receiving a spinous process and comprises a proximal caming surface, wherein each of the first arm and the second arm comprises a bridge and two extensions coupled to the bridge and is configured to receive a one of the adjacent spinous processes between the two extensions; and

rotating a shaft of an actuator assembly to move an actuator of the actuator assembly to move the first and second arms from an undeployed configuration to a deployed configuration in which the first and second arms receive the adjacent spinous processes, wherein the actuator comprises at least one bearing surface contacting at least one of the proximal caming surfaces.

19. The method of claim 18 , wherein the at least one bearing surface contacts the proximal caming surfaces of both the first and second arms.

20. The method of claim 19 , wherein the at least one bearing surface comprises a first bearing surface and a second bearing surface, wherein the first bearing surface contacts the proximal caming surface of the first arm and the second bearing surface contacts the proximal caming surface of the second arm.

Continuity (9)
Continuation 15966287 · Apr 30, 2018
Continuation 14887201 · Oct 19, 2015
Continuation 13619195 · Sep 14, 2012
Continuation 12220427 · Jul 24, 2008
Continuation In Part 12217662 · Jul 8, 2008
Continuation In Part 12148104 · Apr 16, 2008
Continuation In Part 11593995 · Nov 7, 2006
Continuation In Part 11582874 · Oct 18, 2006
Related Publication 20220061894A1 · Mar 3, 2022
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