Stent delivery system
First Claim
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1. A method of delivering a stent within a body comprising:
- providing a catheter having an inner shaft, with a ring disposed on the inner shaft, the ring having discontinuous protrusions at different circumferential positions, a stent mounted around the inner shaft, and a sheath having a longitudinal length positioned around the stent;
the protrusions having an outside diameter at least as great as the outer diameter of the mounted stent;
positioning a distal end of the catheter at a delivery site within the body by advancing the catheter through a body passageway;
translating the sheath relative to the stent;
releasing the stent from the catheter at the delivery site; and
removing the catheter from the body.
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Abstract
The present invention relates to a system for delivering a medical prosthesis into a body lumen. A preferred embodiment of the invention utilizes a catheter having a stent mounted at the distal end that is released into the body lumen by movement of an outer sheath covering the stent in the proximal direction. The stent expands to conform to the inner wall of the lumen and the catheter is withdrawn.
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Citations
9 Claims
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1. A method of delivering a stent within a body comprising:
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providing a catheter having an inner shaft, with a ring disposed on the inner shaft, the ring having discontinuous protrusions at different circumferential positions, a stent mounted around the inner shaft, and a sheath having a longitudinal length positioned around the stent;
the protrusions having an outside diameter at least as great as the outer diameter of the mounted stent;positioning a distal end of the catheter at a delivery site within the body by advancing the catheter through a body passageway; translating the sheath relative to the stent; releasing the stent from the catheter at the delivery site; and removing the catheter from the body. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of delivering a stent within a body comprising:
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providing a catheter having an inner shaft, with a ring disposed on the inner shaft, the ring having discontinuous protrusions at different circumferential positions, a stent mounted around the inner shaft, and a sheath having a longitudinal length positioned around the stent;
the protrusions having an outside diameter at least as great as the outer diameter of the mounted stent and extending through a portion of the proximal end of the stent;positioning a distal end of the catheter at a delivery site within the body by advancing the catheter through a body passageway; translating the sheath relative to the stent; releasing the stent from the catheter at the delivery site; and removing the catheter from the body.
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8. A stent delivery system comprising:
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a catheter having an inner shaft; a ring disposed on the inner shaft, the ring having discontinuous protrusions at different circumferential positions; a stent mounted around the inner shaft, the protrusions having an outside diameter at least as great as the outer diameter of the mounted stent and extending through a portion of the proximal end of the stent; and a sheath having a longitudinal length positioned around the stent.
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9. A method of assembling a stent delivery system comprising:
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a catheter having an inner shaft; disposing a ring on an inner shaft of a catheter, the ring having discontinuous protrusions at different circumferential positions; mounting a stent around the inner shaft, the protrusions having an outside diameter at least as great as the outer diameter of the mounted stent and extending through a portion of the proximal end of the stent; and positioning a sheath having a longitudinal length around the stent.
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Specification