Stent with protruding branch portion for bifurcated vessels
First Claim
Patent Images
1. A bifurcation stent, comprising:
- a tubular member having an inner diameter and an outer diameter defining a wall therebetween, the wall having a geometrical configuration defining a pattern;
an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure having a first ring connected to the tubular member, a second ring connected to the first ring and a transition ring , the first ring being concentric with the second ring, the transition ring comprising a discontinuous portion; and
at least one connecting member formed in the wall of the tubular structure, the at least one connecting member extending though the discontinuous portion of the transition ring and connecting the first ring to a portion of the wall pattern outside of the expandable branch structure;
wherein the second ring substantially surrounds and defines a central branch opening;
wherein the first ring and the second ring are movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the first and second rings are disposed along the wall and in the expanded configuration the first and second rings extend outwardly from the tubular member; and
wherein an auxiliary access opening is defined between the first and second rings to provide access to a branch vessel in the unexpanded condition, the auxiliary access opening being larger than the central branch opening in the unexpanded configuration.
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Abstract
The present invention is directed to a stent for use in a bifurcated body lumen having a main branch and a side branch. The stent comprises a radially expandable generally tubular stent body having proximal and distal opposing ends with a body wall having a surface extending therebetween. The surface has a geometrical configuration defining a first pattern, and the first pattern has first pattern struts and connectors arranged in a predetermined configuration. The stent also comprises a branch portion comprised of a second pattern, wherein the branch portion is at least partially detachable from the stent body.
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Citations
17 Claims
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1. A bifurcation stent, comprising:
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a tubular member having an inner diameter and an outer diameter defining a wall therebetween, the wall having a geometrical configuration defining a pattern; an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure having a first ring connected to the tubular member, a second ring connected to the first ring and a transition ring , the first ring being concentric with the second ring, the transition ring comprising a discontinuous portion; and at least one connecting member formed in the wall of the tubular structure, the at least one connecting member extending though the discontinuous portion of the transition ring and connecting the first ring to a portion of the wall pattern outside of the expandable branch structure; wherein the second ring substantially surrounds and defines a central branch opening; wherein the first ring and the second ring are movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the first and second rings are disposed along the wall and in the expanded configuration the first and second rings extend outwardly from the tubular member; and wherein an auxiliary access opening is defined between the first and second rings to provide access to a branch vessel in the unexpanded condition, the auxiliary access opening being larger than the central branch opening in the unexpanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A bifurcation stent, comprising:
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a tubular member having an inner diameter and an outer diameter defining a wall therebetween, the wall having a geometrical configuration defining a pattern; and an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure having a first ring connected to the tubular member, a second ring connected to the first ring and a transition ring, the first ring being concentric with the second ring, the transition ring comprising a discontinuous portion; and at least one connecting member formed m the wall of the tubular structure, the at least one connecting member extending though the discontinuous portion of the transition ring and connecting the first ring to a portion of the wall pattern outside of the expandable branch structure; wherein the second ring substantially surrounds and defines a central branch opening; wherein the first ring and the second ring are movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the first and second rings are disposed along the wall and in the expanded configuration the first and second rings extend outwardly from the tubular member; and wherein the first and second rings are generally continuous curvilinear members and include undulation peaks, wherein the undulation peaks of the second ring have a radius of curvature of about 0.025 mm to about 0.225 mm. - View Dependent Claims (16)
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17. A bifurcation stent, comprising:
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a tubular member having an inner diameter and an outer diameter defining a wall therebetween, the wall having a geometrical configuration defining a pattern; and an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure having a first ring connected to the tubular member and a second ring connected to the first ring, the first ring being concentric with the second ring; wherein the second ring substantially surrounds and defines a central branch opening; wherein the first ring and the second ring are movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the first and second rings are disposed along the wall and in the expanded configuration the first and second rings extend outwardly from the tubular member; wherein the branch structure includes a transition ring that comprises a discontinuous portion, and the stent further comprises at least one connecting member that extends though the discontinuous onion of the transition ring and connects the first ring to a portion of the wall pattern outside of the expandable branch structure; wherein the second ring is connected to the first ring by a plurality of inner connectors and the first ring is connected to the transition ring by a plurality of outer connectors; and wherein at least one of the outer connectors is a generally undulating curvilinear member extending toward the center of the branch opening.
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Specification