Tissue Cavitation Device and Method
First Claim
1. A method for treating bone comprising the steps of:
- forming a passage in bone;
creating a cavity by cutting bone, wherein the cavity formed by cutting bone is generally spherical and has a larger diameter than the passage; and
expanding the volume of the cavity by expanding a device within the cavity, thereby reducing a fracture.
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Accused Products
Abstract
A percutaneous surgical device and method for creating a cavity within tissue during a minimally invasive procedure. A cavitation device includes a shaft interconnected to a flexible cutting element. A flexible cutting element has a first shape suitable for minimally invasive passage into tissue. The flexible cutting element has a means to move toward a second shape suitable for forming a cavity in tissue. When used in bone, the resulting cavity is usually filled with bone cement or suitable bone replacement material that is injectable and hardens in situ. The disclosed cavitation device and methods can be used for the following applications: (1) treatment or prevention of bone fracture, (2) joint fusion, (3) implant fixation, (4) tissue harvesting (especially bone), (5) removal of diseased tissue (hard or soft tissue), and (6) general tissue removal (hard or soft tissue).
142 Citations
20 Claims
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1. A method for treating bone comprising the steps of:
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forming a passage in bone; creating a cavity by cutting bone, wherein the cavity formed by cutting bone is generally spherical and has a larger diameter than the passage; and expanding the volume of the cavity by expanding a device within the cavity, thereby reducing a fracture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reducing a fracture comprising the steps of:
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forming a passage in bone; providing a tissue cavitation device, wherein the tissue cavitation device comprises a deformable cutting element; separating a portion of bone about the passage with by rotating the deformable cutting element of the tissue cavitation device to create a cavity, wherein the diameter of the cavity is larger than the diameter of the passage; and expanding the volume of the cavity, thereby reducing the fracture. - View Dependent Claims (10, 11, 12, 13, 14, 15, 17, 18, 19, 20)
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16. A method of reducing a fracture comprising the steps of:
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forming a passage in bone using a first device along a linear axis; separating a portion of bone using by rotating a second device to create a cavity, wherein the cavity is substantially coincident with the linear axis and has a non-uniform diameter; and expanding the volume of the cavity with a third device, thereby reducing the fracture.
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Specification