Apparatus and methods for delivery of braided prostheses
First Claim
Patent Images
1. An apparatus for delivering a stent to a body lumen, said apparatus comprising:
- an elongate flexible shaft having a proximal end, a distal end and a lumen therebetween;
self-expanding tubular stent having a sidewall defining a plurality of apertures therethrough, wherein the apertures are adapted to allow fluid flow therethrough, the stent carried in the flexible shaft lumen at least partially in a radially collapsed configuration and being separated into a first portion having a desired length for deployment and a second portion that remains in the flexible shaft lumen in the collapsed configuration after the apparatus has been removed from the body lumen, wherein upon deployment the first portion is radially expanded into an expanded configuration everted relative to the collapsed configuration;
a slidable member adjacent the flexible shaft for advancing the stent from the flexible shaft lumen so that said stent radially expands into engagement with an inner wall of the body lumen and applies a radially outward force against the inner wall; and
a separation element adjacent the flexible shaft, the separation element adapted to separate the stent into the first portion which is released from the flexible shaft so as to remain in the body lumen while the second portion remains disposed at least partially in the flexible shaft lumen after the apparatus has been removed from the body lumen.
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Accused Products
Abstract
Blood vessels and other body lumens are expanded using an evertible braided prosthesis. The braided prosthesis is delivered to the blood vessel in a radially collapsed configuration. A leading edge of the braided prosthesis is then everted so that it expands as it is advanced through the blood vessel. Optionally, the prosthesis can be provided with a biologically active substance in order to inhibit hyperplasia or have other desired biological effects.
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Citations
24 Claims
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1. An apparatus for delivering a stent to a body lumen, said apparatus comprising:
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an elongate flexible shaft having a proximal end, a distal end and a lumen therebetween; self-expanding tubular stent having a sidewall defining a plurality of apertures therethrough, wherein the apertures are adapted to allow fluid flow therethrough, the stent carried in the flexible shaft lumen at least partially in a radially collapsed configuration and being separated into a first portion having a desired length for deployment and a second portion that remains in the flexible shaft lumen in the collapsed configuration after the apparatus has been removed from the body lumen, wherein upon deployment the first portion is radially expanded into an expanded configuration everted relative to the collapsed configuration; a slidable member adjacent the flexible shaft for advancing the stent from the flexible shaft lumen so that said stent radially expands into engagement with an inner wall of the body lumen and applies a radially outward force against the inner wall; and a separation element adjacent the flexible shaft, the separation element adapted to separate the stent into the first portion which is released from the flexible shaft so as to remain in the body lumen while the second portion remains disposed at least partially in the flexible shaft lumen after the apparatus has been removed from the body lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for delivering a stent to a body lumen, said method comprising:
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positioning a delivery catheter carrying self-expanding tubular stent having a sidewall defining a plurality of apertures therethrough adapted to allow fluid flow therethrough, to a target site within the body lumen, the stent being into a first portion having a desired length for deployment and a second portion that remains carried within the delivery catheter after the delivery catheter has been removed from the body lumen; advancing the stent from the delivery catheter into the body lumen; radially expanding the first portion of the stent from a contracted state to an expanded state, wherein in the expanded state the expanded first portion of the stent is in engagement with an inner wall of the body lumen so as to apply a radially outward force against the inner wall, and wherein the expanded first portion is everted relative to the second portion; separating the stent into the first portion and the second portion; and releasing the first portion into the target site while the second portion of the stent remains carried within the delivery catheter after the delivery catheter has been removed from the body lumen. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification