Stent delivery system
First Claim
1. A medical device for delivery of a self-expanding stent comprising:
- a catheter having a catheter shaft, a self-expanding stent disposed about a stent receiving region of the catheter shaft;
a retractable sheath disposed about the catheter shaft and the stent, the retractable sheath having an internal surface and an external surface; and
a retractable membrane, prior to delivery of the stent a first portion of the retractable membrane being positioned between the stent and the inner surface of the retractable sheath, a second portion of the retractable membrane extends from the first portion and along the external surface of the retractable sheath, the retractable sheath and the retractable membrane being independently moveable relative to one another.
3 Assignments
0 Petitions
Accused Products
Abstract
A medical device for delivery of a self-expanding stent comprises a catheter assembly having a catheter shaft and a self-expanding stent disposed thereabout. A retractable sheath is disposed about the catheter shaft and the stent. The retractable sheath retains the stent in a reduced diameter condition prior to delivery. A retractable membrane is also disposed about the catheter shaft and the stent prior to delivery. Prior to delivery a first portion of the membrane is positioned between the stent and the retractable sheath. A second portion of the retractable membrane extends from the first portion and is positioned radially external of the retractable sheath. The retractable sheath and the retractable membrane are independently moveable relative to one another.
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Citations
20 Claims
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1. A medical device for delivery of a self-expanding stent comprising:
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a catheter having a catheter shaft, a self-expanding stent disposed about a stent receiving region of the catheter shaft; a retractable sheath disposed about the catheter shaft and the stent, the retractable sheath having an internal surface and an external surface; and a retractable membrane, prior to delivery of the stent a first portion of the retractable membrane being positioned between the stent and the inner surface of the retractable sheath, a second portion of the retractable membrane extends from the first portion and along the external surface of the retractable sheath, the retractable sheath and the retractable membrane being independently moveable relative to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A medical device for delivery of a self-expanding stent comprising:
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a catheter, the catheter having a catheter shaft, a portion of the catheter shaft defining a stent receiving region; a self-expanding stent, the stent being expandable from a reduced state to an expanded state, in the reduced state the stent having a diameter less than the diameter in the expanded state; a retaining sheath, the retaining sheath being disposed about the catheter shaft and being longitudinally moveable relative thereto, the retaining sheath being moveable between a retaining position and a withdrawn position, in the retaining position the a portion of the retaining region being disposed about the stent receiving region and retaining the stent in the reduced state, in the withdrawn position the sheath being removed from the stent receiving region; and a rolling membrane, the rolling membrane being moveable from a covered configuration to a withdrawn configuration, the rolling membrane having a first end, a second end and inside region and an outside region, the first end being fixedly engaged to a portion of the catheter shaft proximal to the stent receiving region, the inside region positioned between the catheter shaft and the retaining sheath and extending distally from the first end to a distal end of the retaining sheath, the outside region extending to the second end external of the retaining sheath, the outside region extending proximally from the inside region, the second end being engaged to a retraction member, in the covered configuration the inside region positioned between the stent and the retaining sheath, in the withdrawn configuration the rolling membrane being withdrawn from about the stent.
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Specification