Interspinous spacer
First Claim
1. An implantable interspinous spacer for engaging adjacent spinous processes of a subject, the implantable interspinous spacer comprising:
- a body defining a passageway;
arms connected to the body, each arm having a pair of extensions spaced apart from one another to define an opening, wherein the arms are rotatable with respect to the body such that the arms move from an undeployed configuration for inserting the implantable interspinous spacer between the spinous processes to a first deployed configuration for positioning each spinous process within one of the openings between the extensions, and wherein the arms are linearly movable with respect to the body such that the arms move from the first deployed configuration to a second deployed configuration for distracting the spinous processes; and
an actuator assembly configured to deploy the arms and comprising an actuator, wherein the actuator is movable along the passageway to rotate the arms from the undeployed configuration to the first deployed configuration and to linearly move the arms from the first deployed configuration to the second deployed configuration.
1 Assignment
0 Petitions
Accused Products
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 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. An actuator assembly is disposed inside the longitudinal passageway and connected to the body. When advanced, the actuator assembly contacts camming surfaces of the 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 providing sufficient distraction to open the neural foramen. An insertion instrument is provided for implanting the interspinous process spacer. The system is configured for implantation through a small percutaneous incision employing minimally invasive techniques.
591 Citations
28 Claims
-
1. An implantable interspinous spacer for engaging adjacent spinous processes of a subject, the implantable interspinous spacer comprising:
-
a body defining a passageway; arms connected to the body, each arm having a pair of extensions spaced apart from one another to define an opening, wherein the arms are rotatable with respect to the body such that the arms move from an undeployed configuration for inserting the implantable interspinous spacer between the spinous processes to a first deployed configuration for positioning each spinous process within one of the openings between the extensions, and wherein the arms are linearly movable with respect to the body such that the arms move from the first deployed configuration to a second deployed configuration for distracting the spinous processes; and an actuator assembly configured to deploy the arms and comprising an actuator, wherein the actuator is movable along the passageway to rotate the arms from the undeployed configuration to the first deployed configuration and to linearly move the arms from the first deployed configuration to the second deployed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An implantable spacer for distracting adjacent spinous processes of a subject, the implantable spacer comprising:
-
a spacer body defining a passageway; arms coupled to the spacer body and each arm including a pair of extensions spaced apart from one another to define an opening between the extensions; and an actuator assembly in the passageway and operable to cause the arms to rotate from an undeployed configuration for delivering the implantable spacer between the spinous processes toward a deployed configuration for positioning spinous processes in the openings, and wherein the actuator assembly is operable to translate the arms relative to the spacer body such that the arms move linearly from the deployed configuration to a distracted configuration for distracting the spinous processes positioned in the openings. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
25. An implantable spacer for distracting adjacent spinous processes of a subject, the implantable spacer comprising:
-
a spacer body defining a passageway; arms coupled to the spacer body and each arm including a pair of extensions spaced apart from one another to define an opening between the extensions, wherein the arms include a first arm and a second arm, wherein the first arm includes a first pin positioned in a first slot in the spacer body and about which the extensions of the first arm rotate when the first arm moves from the undeployed configuration toward the deployed configuration, and a second pin positioned in a second slot in the spacer body and movable along the second slot to move the first arm toward the deployed configuration, wherein the second slot has an arcuate section and a linear section, wherein the second pin moves along the arcuate section when the first arm rotates toward the deployed configuration, and wherein the second pin moves along the linear section when the first arm moves toward the distracted configuration; and an actuator assembly in the passageway and operable to cause the arms to rotate from an undeployed configuration for delivering the implantable spacer between the spinous processes toward a deployed configuration for positioning spinous processes in the openings, and wherein the actuator assembly is operable to drive the arms from the deployed configuration to a distracted configuration for distracting the spinous processes positioned in the openings. - View Dependent Claims (26)
-
-
27. An implantable interspinous spacer for engaging adjacent first and second vertebrae of a subject, comprising:
-
a body; first and second arms each rotatable with respect to the body to move from a delivery configuration to a rotated configuration for engaging the first and second vertebrae, and wherein the first and second arms are linearly movable with respect to the body to move from the rotated configuration to a distraction configuration; and an actuator movable along the body to rotate the first and second arms toward the rotated configuration and to linearly move the first and second arms toward the distracted configuration. - View Dependent Claims (28)
-
Specification