Bone access system
First Claim
1. A bone access system comprising:
- a cannula, said cannula adapted for driving through compact bone tissue, a flexible conduit, said conduit adapted to be slidably received within said cannula, and a core wire, said core wire adapted to be slidably received within said flexible conduit and including a distal portion having a pre-formed curve, wherein, together, said core wire and said flexible conduit are adapted to be advanced from a distal end of said cannula to form a curved path through cancellous bone tissue.
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Accused Products
Abstract
Instruments and methodology for nonlinear access to bone tissue sites are described. Embodiments disclosed include a conduit for delivering material or a medical device to a site and a core member that is able to steer the conduit and allow the combination to be advanced thorough cancellous bone. A cannula and stylet may be provided to first advance through hard bone. The core member includes a curved tip that may be straightened by the cannula or an actuator sheath to vary sweep of the curve. An obturator may be included in the system. This instrument may include a flexible portion as well. Each of the obturator and conduit may be provided with any of a variety of active tips. The systems may be used to perform hard tissue site implantation, for example, in connection with a high pressure injection system.
147 Citations
18 Claims
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1. A bone access system comprising:
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a cannula, said cannula adapted for driving through compact bone tissue, a flexible conduit, said conduit adapted to be slidably received within said cannula, and a core wire, said core wire adapted to be slidably received within said flexible conduit and including a distal portion having a pre-formed curve, wherein, together, said core wire and said flexible conduit are adapted to be advanced from a distal end of said cannula to form a curved path through cancellous bone tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18)
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17. A method of bone access comprising:
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advancing a cannula through bone tissue in a substantially straight path; and
advancing a steerable member inserted in said cannula through bone tissue in a path that extends radially from an axis of said cannula, wherein said steerable member comprises a flexible conduit and a core wire having a preformed curve, said core wire adapted to direct said conduit in said radially-extending path upon release from a substantially straight, constrained state.
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Specification