BALLOON EXPANDABLE CEMENT DIRECTOR AND RELATED METHODS
First Claim
1. A system for treating a vertebral body comprising:
- a delivery device comprising a distal end configured for insertion into a vertebral body and a proximal end comprising a handle;
an expandable device configured to be releasably coupled to the distal end of the delivery device, the expandable device comprising a mesh structure comprising a plurality of layers including a first layer comprising a first shape memory material in an austenite phase at body temperature and a second layer comprising a second shape memory material in a martensite phase at body temperature, wherein by forming the mesh structure with the austenite layer and a martensite layer, the mesh structure is configured to correspond in shape to an original undeformed shape of the mesh structure prior to collapsing the mesh structure for delivery, the mesh structure provides structural support for the vertebral body upon deployment and prior to cement injection, anda balloon configured to be coupled at the distal end of the delivery device and adapted to expand the expandable device when disposed therein.
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Accused Products
Abstract
The invention relates to a cement director for insertion within a vertebral body or other body structure, and related methods of use. An example method includes creating a cavity in a vertebral body, inserting a collapsible mesh structure into the cavity in a collapsed state, wherein the collapsible mesh structure comprises regions of different permeability to a bone cement, inflating a balloon within the collapsible mesh structure to expand the mesh structure, and injecting a bone cement into the mesh structure, wherein the bone cement flows preferentially out of the mesh structure through at least one region of greater permeability.
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Citations
20 Claims
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1. A system for treating a vertebral body comprising:
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a delivery device comprising a distal end configured for insertion into a vertebral body and a proximal end comprising a handle; an expandable device configured to be releasably coupled to the distal end of the delivery device, the expandable device comprising a mesh structure comprising a plurality of layers including a first layer comprising a first shape memory material in an austenite phase at body temperature and a second layer comprising a second shape memory material in a martensite phase at body temperature, wherein by forming the mesh structure with the austenite layer and a martensite layer, the mesh structure is configured to correspond in shape to an original undeformed shape of the mesh structure prior to collapsing the mesh structure for delivery, the mesh structure provides structural support for the vertebral body upon deployment and prior to cement injection, and a balloon configured to be coupled at the distal end of the delivery device and adapted to expand the expandable device when disposed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for treating a vertebral body comprising:
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a delivery device comprising a distal end configured for insertion into a vertebral body and a proximal end comprising a handle; an expandable device configured to be releasably coupled to the distal end of the delivery device, the expandable device comprising a mesh structure comprising a plurality of layers including a first layer comprising a first shape memory material in an austenite phase at body temperature and a second layer comprising a second shape memory material in a martensite phase at body temperature, wherein the mesh structure includes at least one region of greater permeability relative to a second region of lesser permeability, and a balloon configured to be coupled at the distal end of the delivery device and adapted to expand the expandable device when disposed therein. - View Dependent Claims (17, 18, 19, 20)
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Specification