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; and
an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure being connected to the tubular member at a plurality of locations, the expandable branch structure having a first ring connected to the tubular member, a second ring connected to the first ring and a third ring connected to the second ring,wherein the expandable branch structure includes a distal portion and a proximal portion, and at least one partial distal ring is connected to the first ring at the distal portion and at least one partial proximal ring is connected to the first ring at the proximal portion, and wherein the rings and the partial rings at the proximal and distal portions form a lattice portion,wherein the third ring substantially surrounds and defines a central branch opening, andwherein the expandable branch structure is movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the expandable branch structure is disposed along the wall and in the expanded configuration the expandable branch structure extends outwardly from the tubular member.
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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 stent also comprises a branch portion that is deployable outwardly from the stent body into a branch vessel.
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Citations
19 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; and an expandable branch structure formed in the wall of the tubular structure and interrupting the wall pattern, the expandable branch structure being connected to the tubular member at a plurality of locations, the expandable branch structure having a first ring connected to the tubular member, a second ring connected to the first ring and a third ring connected to the second ring, wherein the expandable branch structure includes a distal portion and a proximal portion, and at least one partial distal ring is connected to the first ring at the distal portion and at least one partial proximal ring is connected to the first ring at the proximal portion, and wherein the rings and the partial rings at the proximal and distal portions form a lattice portion, wherein the third ring substantially surrounds and defines a central branch opening, and wherein the expandable branch structure is movable from an unexpanded configuration to an expanded configuration, in the unexpanded configuration the expandable branch structure is disposed along the wall and in the expanded configuration the expandable branch structure extends outwardly from the tubular member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification