Expansion-assisting delivery system for self-expanding stent
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Abstract
A delivery system for a self-expanding stent includes a catheter having a distal end and being configured to retain a self-expanding stent proximate the distal end. The delivery system also includes an inflatable device provided on the catheter and positioned proximate the distal end. The inflatable device, typically a balloon, is configured to selectively assist the self-expanding stent with radially expansion. The catheter includes a tubular member and an outer member coaxially positioned about the tubular member. The outer member can slide relative to the tubular member in an axial direction. The outer member is configured to retain a self-expanding stent in a radially-compressed position and to release the self-expanding stent to a radially-expanded position. The delivery system may also include a holding sleeve provided on the tubular member, spaced from the distal end of the catheter, and configured to hold the self-expanding stent. The delivery system preferably includes a loading funnel configured to be removably attachable to the distal end of the tubular member and configured to assist with radial compression of the self-expanding stent and advancement of the self-expanding stent within the outer member.
70 Citations
49 Claims
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1-28. -28. (canceled)
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29. A delivery system for a self-expanding stent, the delivery system comprising:
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an inner member having a distal end, the inner member being configured to retain a self-expanding stent proximate the distal end, the inner member including a marker band disposed between a distalmost leading end of the self-expanding stent and a trailing end of the self-expanding stent, wherein the marker band indicates a re-constrain limit of a partially-expanded, self-expanding stent;
an outer member positioned about the inner member, the outer member being slidable relative to the inner member in an axial direction;
a holding sleeve positioned within an interior of the stent so as to retain the positioning of the stent; and
a single inflatable device positioned about the inner member, wherein the inflatable device is disposed solely between the holding sleeve and the distal end of the inner member. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method for implantation of a self-expanding stent, the method comprising:
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providing a delivery system comprising;
a self-expanding stent;
an inner member having a distal end, the inner member being configured to retain a self-expanding stent proximate the distal end, the inner member including a marker band disposed between a distalmost leading end of the self-expanding stent and a trailing end of the self-expanding stent, wherein the marker band indicates a re-constrain limit of a partially-expanded, self-expanding stent;
an outer member positioned about the inner member, the outer member being slidable relative to the inner member in an axial direction;
a holding sleeve positioned within an interior of the stent so as to retain the positioning of the stent; and
a single inflatable device positioned about the inner member, wherein the inflatable device is disposed solely between the holding sleeve and the distal end of the inner member;
delivering the delivery system to a region of a vessel to be repaired;
implanting the self-expanding stent into a wall of the vessel to be repaired; and
inflating the inflatable device to assist expansion of the self-expanding stent. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
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Specification