Stent with protruding branch portion for bifurcated vessels
First Claim
1. A stent for implantation in a bifurcated body lumen having a main branch vessel and a side branch vessel, wherein the stent comprises:
- a main stent body with a body wall extending along a longitudinal axis from a distal end to a proximal end and defining a main lumen extending therethrough; and
a branch portion comprising a branch portion wall connected to the body wall, the branch portion positioned between the distal and proximal ends of said main stent body and movable with respect to the main stent body from a first position to a second position,wherein in the first position the branch portion wall is substantially coplanar with said body wall and in the second position the branch portion wall is offset with respect to the body wall,wherein the branch portion wall comprises first and second portions, wherein in the first position the branch portion wall defines an interior surface and an exterior surface, and wherein in the second position the first portion exterior surface of the branch portion wall is configured to contact and support the branch vessel wall and the second portion interior surface of the branch portion wall is configured to contact and support the branch vessel wall.
2 Assignments
0 Petitions
Accused Products
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
21 Claims
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1. A stent for implantation in a bifurcated body lumen having a main branch vessel and a side branch vessel, wherein the stent comprises:
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a main stent body with a body wall extending along a longitudinal axis from a distal end to a proximal end and defining a main lumen extending therethrough; and a branch portion comprising a branch portion wall connected to the body wall, the branch portion positioned between the distal and proximal ends of said main stent body and movable with respect to the main stent body from a first position to a second position, wherein in the first position the branch portion wall is substantially coplanar with said body wall and in the second position the branch portion wall is offset with respect to the body wall, wherein the branch portion wall comprises first and second portions, wherein in the first position the branch portion wall defines an interior surface and an exterior surface, and wherein in the second position the first portion exterior surface of the branch portion wall is configured to contact and support the branch vessel wall and the second portion interior surface of the branch portion wall is configured to contact and support the branch vessel wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A stent for implantation in a bifurcated body lumen having a main branch vessel and a side branch vessel, wherein the stent comprises:
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a main stent body with a body wall comprising a plurality of ring portions, the wall extending along a longitudinal axis from a distal end to a proximal end and defining a main lumen extending therethrough; and a branch portion comprising a branch portion wall connected to the body wall, the branch portion positioned between the distal and proximal ends of said main stent body and movable with respect to the main stent body from a first position to a second position, wherein in the first position the branch portion wall is substantially coplanar with said body wall and in the second position the branch portion wall is offset with respect to the body wall, wherein the branch portion defines inner and outer surfaces in the first position, and comprises a proximal branch portion and a distal branch portion, the proximal branch portion comprising a plurality of proximal branch portion struts and the distal branch portion comprising a plurality of distal branch portion struts; wherein in the second position the proximal branch portion exterior is configured to contact and support the branch vessel wall and the distal branch portion interior surface is configured to contact and support the branch vessel wall; and wherein each of the plurality of proximal branch portion struts comprise two substantially parallel strut portions connected by a curved portion and each of the plurality of distal branch portion struts comprise two substantially non-parallel strut portions connected by a curved portion. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A stent for implantation in a bifurcated body lumen having a main branch vessel and a side branch vessel, wherein the stent comprises:
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a main stent body with a body wall extending along a longitudinal axis from a distal end to a proximal end and defining a main lumen extending therethrough; and a branch portion comprising a branch portion wall, a plurality of distal branch portion struts and a plurality of proximal branch portion struts, wherein the branch portion wall comprises a plurality of ring portions, the branch portion wall connected to the body wall, the branch portion positioned between the distal and proximal ends of said main stent body and movable with respect to the main stent body from a first unextended position to a second extended position, wherein in the first unextended position the plurality of proximal branch portion struts comprise an exterior surface and the plurality of distal branch portion struts comprise an interior surface wherein in the first unextended position the branch portion wall is substantially coplanar with said body wall and in the second extended position the branch portion wall is offset with respect to the body wall, wherein each of the plurality of distal branch portion struts comprise two substantially parallel strut portions connected by a curved distal portion and each of the plurality of proximal branch portion struts comprise two substantially parallel strut portions connected by a curved distal portion and wherein the plurality of distal branch struts are connected to each other by curved proximal portions and the plurality of proximal branch struts are connected to each other by curved proximal portions, wherein the exterior surface of the plurality of proximal branch portion struts is configured to contact and support the branch vessel wall in the second extended position and the interior surface of the plurality distal branch portion struts is configured to contact and support the branch vessel wall in the second extended position, and wherein in the first unextended position the plurality of distal branch portion struts are nested within the plurality of proximal branch portion struts. - View Dependent Claims (19, 20, 21)
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Specification