Interspinous spacer
First Claim
1. An implantable spacer for placement between adjacent spinous processes, the adjacent spinous processes including a superior spinous process and an inferior spinous process, each of the superior and inferior spinous processes having two lateral surfaces, the implantable spacer comprising:
- a body having a longitudinal axis, a first lateral side, and a second lateral side;
a wing connected to the body and capable of movement with respect to the body, the wing comprising a first rotating member at the first lateral side of the body including a first pair of extension members having first longitudinal axes, a second rotating member at the second lateral side of the body including a second pair of extension members having second longitudinal axes, and at least one caming surface;
an actuator assembly connected to the body, the actuator assembly comprising an actuator and a shaft connected to the actuator;
wherein the actuator assembly is configured such that the shaft is accessible at the proximal end of the spacer, and the actuator is configured to move relative to the body to contact the caming surface of the wing to move the wing from a first position for insertion to a second position for stabilizing the spinous processes; and
wherein the first longitudinal axes of the first pair of extension members are coincident with each other in the first and second positions, and the second longitudinal axes of the second pair of extension members are coincident with each other in the first and second positions.
2 Assignments
0 Petitions
Accused Products
Abstract
An implantable spacer for placement between adjacent spinous processes is provided. The spacer includes a body and a wing rotatable connected to the body. The wing includes two U-shaped configurations that together define a substantially H-shaped configuration for retaining the spacer between adjacent spinous processes. An actuator assembly is connected to the body and to the wing with the proximal end of the spacer being connectable to a removable driver that is configured to engage the actuator assembly. While connected to the spacer, the driver is rotatable in one direction to deploy the wing from an undeployed to a deployed configuration and in an opposite direction to undeploy the wing. In the deployed configuration, the spacer acts as a space holder opening up the area of the spinal canal, maintaining foraminal height, reducing stress on the facet joints and relieving pain for the patient.
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Citations
24 Claims
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1. An implantable spacer for placement between adjacent spinous processes, the adjacent spinous processes including a superior spinous process and an inferior spinous process, each of the superior and inferior spinous processes having two lateral surfaces, the implantable spacer comprising:
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a body having a longitudinal axis, a first lateral side, and a second lateral side; a wing connected to the body and capable of movement with respect to the body, the wing comprising a first rotating member at the first lateral side of the body including a first pair of extension members having first longitudinal axes, a second rotating member at the second lateral side of the body including a second pair of extension members having second longitudinal axes, and at least one caming surface; an actuator assembly connected to the body, the actuator assembly comprising an actuator and a shaft connected to the actuator; wherein the actuator assembly is configured such that the shaft is accessible at the proximal end of the spacer, and the actuator is configured to move relative to the body to contact the caming surface of the wing to move the wing from a first position for insertion to a second position for stabilizing the spinous processes; and wherein the first longitudinal axes of the first pair of extension members are coincident with each other in the first and second positions, and the second longitudinal axes of the second pair of extension members are coincident with each other in the first and second positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An implantable spacer for placement between adjacent spinous processes, the adjacent spinous processes including a superior spinous process and an inferior spinous process, each of the superior and inferior spinous processes having two lateral surfaces, the implantable spacer comprising:
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a body having a first lateral portion, a second lateral portion, a superior surface configured to contact the superior spinous process, and an inferior surface configured to contact the inferior spinous process; a wing assembly having a first rotating member at the first lateral portion and a second rotating member at the second lateral portion, wherein the first rotating member has a first superior extension member and a first inferior extension member extending coincidentally along a first common axis in an undeployed state, and the second rotating member has a second superior extension member and a second inferior extension member extending coincidentally along a second common axis in the undeployed state; and an actuator coupled to the body, the actuator being configured to rotate the first and second rotating members such that the first superior and first inferior extension members rotate together in a common rotational direction and the second superior and second inferior extension members rotate together in the common rotational direction from the undeployed state to a deployed state. - View Dependent Claims (22, 23, 24)
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Specification