Stent delivery system allowing controlled release of a stent
First Claim
1. A stent delivery system, comprising:
- a generally cylindrical stent expandable from a collapsed state to an expanded state, the stent comprising a first portion having a first inner diameter and a second portion having a second inner diameter, the first inner diameter being smaller than the second inner diameter wherein the difference between the first inner diameter and the second inner diameter of the stent is the same in both the collapsed state and the expanded state; and
,a generally cylindrical holder comprising a first section having a first diameter and a second section having a second diameter, the first diameter being smaller than the second diameter, wherein a shoulder is formed between the first section and the second section of the holder, the shoulder being disposed distally adjacent the first portion of the stent; and
,wherein the stent is collapsed onto the holder, the second diameter of the holder being larger than the first inner diameter of the collapsed stent and smaller than the second inner diameter of the collapsed stent, the shoulder overlapping the first portion of the stent.
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Accused Products
Abstract
A stent delivery system includes a stent having at least one eyelet and at least one rivet and a holder supporting the stent, wherein the holder includes a first section having a first diameter and a second section having a second diameter. A sheath covers the stent and the holder. The rivets are attached to each of the eyelets. A first inner diameter of the stent at the position of the rivets is smaller than a second inner diameter of the stent at other positions because the rivets protrude inwardly. A shoulder is formed on the holder due to the difference between the first diameter and the second diameter of the holder. The shoulder is positioned distally adjacent the rivets. The shoulder interferes with the protruding rivets, thereby restraining the longitudinal movement of the stent relative to the holder. Although the sheath is pulled back, the stent does not jump out of the stent delivery system. As a result, the stent delivery system allows the stent to be released in a controlled manner upon its deployment.
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Citations
27 Claims
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1. A stent delivery system, comprising:
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a generally cylindrical stent expandable from a collapsed state to an expanded state, the stent comprising a first portion having a first inner diameter and a second portion having a second inner diameter, the first inner diameter being smaller than the second inner diameter wherein the difference between the first inner diameter and the second inner diameter of the stent is the same in both the collapsed state and the expanded state; and
,a generally cylindrical holder comprising a first section having a first diameter and a second section having a second diameter, the first diameter being smaller than the second diameter, wherein a shoulder is formed between the first section and the second section of the holder, the shoulder being disposed distally adjacent the first portion of the stent; and
,wherein the stent is collapsed onto the holder, the second diameter of the holder being larger than the first inner diameter of the collapsed stent and smaller than the second inner diameter of the collapsed stent, the shoulder overlapping the first portion of the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A stent delivery system, comprising:
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a generally cylindrical stent expandable from a collapsed state to an expanded state, the stent comprising a first portion having a first inner diameter and a second portion having a second inner diameter, the first inner diameter being smaller than the second inner diameter wherein the difference between the first inner diameter and the second inner diameter of the stent is the same in both the collapsed state and the expanded state; and
,a generally cylindrical holder comprising a first section having a first diameter, a second section having a second diameter, a third section having a third diameter and a fourth section having a fourth diameter, the first diameter being smaller than the second diameter, the second diameter being smaller than the fourth diameter and the third diameter being smaller than the second diameter and the third section disposed distally adjacent the second section, wherein a shoulder is formed between the first section and the second section and a groove is formed by the first section, the second section and the fourth section; and
,wherein the stent is collapsed onto the holder, the second diameter of the holder being larger than the first inner diameter of the collapsed stent and smaller than the second inner diameter of the collapsed stent and the shoulder is disposed distally adjacent the first portion of the stent and overlapping the first portion of the stent, thereby temporarily restraining a longitudinal movement of the stent relative to the holder. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification