Bifurcated stent with minimally circumferentially projected side branch
First Claim
1. A stent having a contracted state, wherein the stent is expandable from the contracted state to an expanded state, the stent comprising:
- a primary tubular body defining a lumen having a proximal end and a distal end and an axis extending through the proximal and distal ends, the primary tubular body further comprising;
a plurality of continuous expansion columns and a plurality of discontinuous expansion columns, wherein the plurality of continuous expansion columns and the plurality of discontinuous expansion columns are interconnected and circumferentially positioned around the axis of the primary tubular body and are longitudinally spaced from the proximal end of the primary tubular body to the distal end of the primary tubular body and wherein the plurality of discontinuous expansion columns are between a plurality of the continuous expansion columns positioned proximally to the plurality of the discontinuous expansion columns and a plurality of the continuous expansion columns positioned distally to the plurality of the discontinuous expansion columns, wherein, when the stent is in its expanded state, the stent further comprises;
a secondary tubular body defining a lumen and having an axis extending therethrough, wherein the lumen of the secondary tubular body is in fluid communication with the lumen of the primary tubular body and the axis of the secondary tubular body is at an oblique angle relative to the axis of the primary tubular body, the secondary tubular body comprising a side wall positioned around the axis of the secondary tubular body and terminating end, wherein the side wall is between the terminating end and the primary tubular body and wherein the side wall is formed by the plurality of discontinuous expansion columns.
1 Assignment
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Accused Products
Abstract
The present invention is directed toward a bifurcation stent comprising a plurality of interconnected expansion columns, wherein the plurality of interconnected expansion columns are longitudinally spaced from the proximal end of the stent to the distal end of the stent and wherein the plurality of interconnected expansion columns define a plurality of cells. The inventive stent further comprises a framework defining a side branch cell. The framework is designed to minimize the circumferential space the side branch structure consumes. A plurality of expansion columns are connected to the framework. When the side branch is extended and expanded, the connected expansion columns form the wall of the side branch and the framework expands to conform to the shape of a targeted bodily vessel.
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Citations
33 Claims
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1. A stent having a contracted state, wherein the stent is expandable from the contracted state to an expanded state, the stent comprising:
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a primary tubular body defining a lumen having a proximal end and a distal end and an axis extending through the proximal and distal ends, the primary tubular body further comprising;
a plurality of continuous expansion columns and a plurality of discontinuous expansion columns, wherein the plurality of continuous expansion columns and the plurality of discontinuous expansion columns are interconnected and circumferentially positioned around the axis of the primary tubular body and are longitudinally spaced from the proximal end of the primary tubular body to the distal end of the primary tubular body and wherein the plurality of discontinuous expansion columns are between a plurality of the continuous expansion columns positioned proximally to the plurality of the discontinuous expansion columns and a plurality of the continuous expansion columns positioned distally to the plurality of the discontinuous expansion columns, wherein, when the stent is in its expanded state, the stent further comprises;
a secondary tubular body defining a lumen and having an axis extending therethrough, wherein the lumen of the secondary tubular body is in fluid communication with the lumen of the primary tubular body and the axis of the secondary tubular body is at an oblique angle relative to the axis of the primary tubular body, the secondary tubular body comprising a side wall positioned around the axis of the secondary tubular body and terminating end, wherein the side wall is between the terminating end and the primary tubular body and wherein the side wall is formed by the plurality of discontinuous expansion columns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 33)
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26. A stent, the stent comprising:
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a main body, the main body being a tubular structure and comprising a proximal end, a distal end and an axis extending through the proximal and distal ends of the main body, the main body further comprising a plurality of interconnected expansion columns, wherein the plurality of interconnected expansion columns are longitudinally spaced from the proximal end of the main body to the distal end of the main body and wherein the plurality of interconnected expansion columns define a plurality of cells, the plurality of interconnected expansion columns comprising a first expansion column, wherein the first expansion column is circumferentially oriented relative to the axis of the main body, the first expansion column having a first end and a second end, and a second expansion column, wherein the second expansion column is circumferentially oriented relative to the axis of the main body and is longitudinally adjacent to the first expansion column, the second expansion column having a first end and a second end, and a side branch, the side branch having an axis and extending radially from the main body between the proximal and distal ends of the main body, wherein the side branch comprises an expanded framework, the expanded framework being the terminating end of the side branch and having a ring shaped configuration and being positioned radially above the main body, the side branch further comprising a side branch wall positioned between the main body and the expanded framework, wherein the first and second ends of the first and second expansion columns are connected to the expanded framework and form at least part of the side branch wall. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification