Device to aid in the deployment of a shape memory instrument
First Claim
1. A method of creating or enlarging a cavity in a vertebral body, the method comprising steps of:
- inserting a friction reduction covering and a cavity creation member toward the vertebral body, wherein the friction reduction covering defines a covering opening and the cavity creation member includes an end portion substantially disposed in the covering opening;
moving the cavity creation member relative to the friction reduction covering, while a cannula causes the friction reduction covering to remain stationary in the cannula, such that the end portion becomes increasingly displaced from the friction reduction covering; and
during the moving step, transitioning the end portion from a first shape to a second shape that is different from the first shape.
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Abstract
A system is configured to create or enlarge a cavity in a tissue body and generally includes a cannula, a friction reduction covering, and a cavity creation member. The cavity creation member includes an end portion that is configured to transition between a first shape and a second shape that is different from the first shape. In operation, retracting the friction reduction covering relative to end portion causes the end portion to change shape from the first shape to the second shape such that the cavity creation member is configured to create or enlarge a cavity in the tissue body as the second end portion exits the friction reduction member.
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Citations
20 Claims
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1. A method of creating or enlarging a cavity in a vertebral body, the method comprising steps of:
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inserting a friction reduction covering and a cavity creation member toward the vertebral body, wherein the friction reduction covering defines a covering opening and the cavity creation member includes an end portion substantially disposed in the covering opening; moving the cavity creation member relative to the friction reduction covering, while a cannula causes the friction reduction covering to remain stationary in the cannula, such that the end portion becomes increasingly displaced from the friction reduction covering; and during the moving step, transitioning the end portion from a first shape to a second shape that is different from the first shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of creating or enlarging a cavity in a vertebral body, the method comprising steps of:
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inserting a friction reduction covering and a cavity creation member towards the vertebral body, wherein the friction reduction covering defines a covering opening and the cavity creation member includes an end portion substantially disposed in the covering opening; moving an adjustable stop away from both the friction reduction covering and the end portion of the cavity creation member so as to define a gap between the adjustable stop and a proximal end of the friction reduction covering; moving the cavity creation member relative to the friction reduction covering such that the end portion becomes increasingly displaced from the friction reduction covering, the step of moving the cavity creation member comprising applying a biasing force to the cavity creation member so as to close the gap; and during the step of moving the cavity creation member, transitioning the end portion from a first shape to a second shape that is different from the first shape. - View Dependent Claims (18, 19, 20)
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Specification