AXIALLY COMPRESSIBLE FLARED STENTS AND APPARATUS AND METHODS FOR DELIVERING THEM
First Claim
1. A stent comprising a tubular member including first and second ends defining a longitudinal axis therebetween and a plurality of cells disposed between the first and second ends, the tubular member being expandable from a contracted condition to an enlarged condition, the stent comprising:
- a first flaring portion configured to flare outwardly when the stent is expanded from the contracted condition to the enlarged condition; and
a second main portion adjacent the first portion, the second portion comprising a plurality of bands of cells connected to one another such that the main portion is axially compressible when the stent is expanded from the contracted condition to the enlarged condition.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent includes a flaring portion and a main portion connected to the flaring portion. The main portion includes a plurality of bands of cells spaced apart axially from one another, adjacent bands of cells being intermittently connected to one another. During use, the stent is introduced into a main vessel in a contracted condition and positioned with the flaring portion adjacent an ostium. The flaring portion is flared, and the stent is advanced at least partially into the ostium. The stent is expanded further such that the main portion expands within the branch body lumen and/or the flaring portion expands adjacent the ostium. The main portion compresses axially during at least one of the steps when the stent is expanded, which may enhance conformance of the stent relative to the ostium and/or enhance reinforcement of the ostium.
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Citations
28 Claims
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1. A stent comprising a tubular member including first and second ends defining a longitudinal axis therebetween and a plurality of cells disposed between the first and second ends, the tubular member being expandable from a contracted condition to an enlarged condition, the stent comprising:
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a first flaring portion configured to flare outwardly when the stent is expanded from the contracted condition to the enlarged condition; and
a second main portion adjacent the first portion, the second portion comprising a plurality of bands of cells connected to one another such that the main portion is axially compressible when the stent is expanded from the contracted condition to the enlarged condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A stent comprising a tubular member including first and second ends defining a longitudinal axis therebetween and a plurality of cells disposed between the first and second ends, the tubular member being expandable from a contracted condition to an enlarged condition through an intermediate condition, the stent comprising:
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a first flaring portion configured to flare outwardly when the stent is expanded from the contracted condition to the intermediate condition, the first flaring portion comprising a first set of cells at the first end and a second set of cells adjacent the first set of cells, the second set of cells comprising segments extending substantially axially in the contracted condition;
a second main portion adjacent the first flaring portion, the second main portion comprising a plurality of bands of cells; and
a plurality of links intermittently extending between adjacent bands of cells of the second main portion to allow axial compression or expansion of the adjacent bands of cells when the stent is expanded from the contracted condition to the expanded condition. - View Dependent Claims (12, 13)
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14. An apparatus for treating an ostium communicating between a main body lumen and a branch body lumen, comprising:
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an elongate member comprising a proximal end, a distal end sized for introduction into the main body lumen and the branch body lumen;
a first expandable member on the distal end, the first expandable member being expandable from a collapsed configuration to a generally spherical expanded configuration;
a second expandable member on the distal end adjacent the first expandable member, the second expandable member being expandable from a collapsed configuration to a substantially cylindrical expanded configuration; and
a stent on the distal end over the first and second expandable members, the stent comprising a first flaring portion overlying a portion of the first expandable member, and a second main portion overlying the second expandable member, the second main portion being axially compressible during expansion of at least one of the first and second expandable members. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for expanding a stent, comprising:
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providing a stent on one or more expandable members, the stent comprising first and second ends, a first flaring portion, and a second main portion connected to the first flaring portion;
expanding an expandable member to flare the first flaring portion;
expanding an expandable member to expand the second main portion to an enlarged condition, thereby causing the second main portion to shorten axially.
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28. A method for delivering a stent within an ostium communicating between a main body lumen and a branch body lumen, the stent comprising first and second ends, a first flaring portion, and a second main portion, the method comprising:
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introducing the stent into the main body lumen with the stent in a contracted condition;
flaring the first flaring portion to a first expanded size;
advancing the stent into the ostium with the first flaring portion flared;
expanding the stent such that the second main portion expands within the branch body lumen; and
expanding the stent further such that the first flaring portion expands to a second expanded size greater than the first expanded size, wherein the second main portion foreshortens when at least one of the second main portion expands within the branch body lumen and the first flaring portion expands to the second expanded size.
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Specification