Stent delivery system
First Claim
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1. A stent delivery system comprising:
- a catheter having an inner shaft with a distal end and a proximal end;
an outer shaft disposed around the inner shaft, wherein the outer shaft is movable relatively to the inner shaft;
a handle attached to the proximal end of the catheter;
a stent concentrically arranged around a distal region of the inner shaft, wherein a guide wire is disposed in a lumen of the inner shaft; and
a sheath extending around the inner shaft and the stent, the sheath having a composite structure and being coupled to an actuator on the handle with a wire such that the sheath can be moved longitudinally relative to the inner shaft in response to the movement of the actuator.
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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 The stent expands to conform to the inner wall of the lumen and the catheter is withdrawn.
326 Citations
12 Claims
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1. A stent delivery system comprising:
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a catheter having an inner shaft with a distal end and a proximal end;
an outer shaft disposed around the inner shaft, wherein the outer shaft is movable relatively to the inner shaft;
a handle attached to the proximal end of the catheter;
a stent concentrically arranged around a distal region of the inner shaft, wherein a guide wire is disposed in a lumen of the inner shaft; and
a sheath extending around the inner shaft and the stent, the sheath having a composite structure and being coupled to an actuator on the handle with a wire such that the sheath can be moved longitudinally relative to the inner shaft in response to the movement of the actuator. - View Dependent Claims (2, 3, 4, 5)
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6. A stent delivery system comprising:
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a catheter having an inner shaft with a distal end and a proximal end, wherein a guidewire is disposed within a lumen of the inner shaft;
a handle attached to the proximal end of the catheter;
an outer shaft disposed around the inner shaft, wherein the outer shaft is movable relatively to the inner shaft;
a stent mounting platform extending concentrically around a distal section of the inner shaft, wherein a guide wire is disposed in a lumen of the inner shaft;
a sheath with a proximal end and a distal end, the sheath having a plurality of layers such that a material property of at least one of the layers of the sheath varies from the proximal end to the distal end of the sheath; and
an actuator on the handle, the actuator being coupled to the sheath with a wire such that the sheath can be moved relative to the stent mounting platform with the actuator. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification