Bifurcation stent and balloon assemblies
First Claim
1. A bifurcated stent having an unexpanded state and an expanded state, the stent constructed of a plurality of interconnected strut members forming a plurality of expansion columns along a length of the stent, the stent comprising:
- a generally tubular first body defining a first lumen, the first body having a side opening bounded by a perimeter, a distal region distal to the side opening and having a distal region diameter, a proximal region proximal to the side opening and having a proximal region diameter, and a medial region between the distal and proximal regions, wherein the medial region defines the side opening,wherein the medial region comprises at least three axially spaced expansion columns, each expansion column has a plurality of undulations, a continuous length including the undulations, and a diameter, the at least three axially spaced expansion columns comprise a proximal most expansion column at a proximal end of the medial region, a distal most expansion column at a distal end of the medial region, and at least one intermediate expansion column therebetween, wherein the proximal most expansion column and the distal most expansion column have different maximum expansion capacities, wherein the continuous length of the proximal most expansion column of the medial region is greater than the continuous length of the at least one intermediate expansion column, and the continuous length of the at least one intermediate expansion column is greater than the continuous length of the distal most expansion column of the medial region;
wherein, in the expanded state, the proximal region diameter is greater than the distal region diameter, wherein the proximal region diameter and the distal region diameter differ in size by one magnitude selected from the inclusive range of 18% to 35%;
wherein the medial region has a tapering diameter transitioning from a maximum diameter equal to the proximal region diameter at a proximal end of the medial region to a minimum diameter equal to the distal region diameter size at a distal end of the medial region, anda second body comprising at least two projecting members,wherein, in the expanded state, at least one of the projecting members of the second body extends obliquely from the first body, and the projecting members define a second lumen therethrough, and the second lumen is in fluid communication with the first lumen.
1 Assignment
0 Petitions
Accused Products
Abstract
A bifurcated stent that is positionable adjacent to a branched body vessel. The stent includes a tapered middle portion with a side branch assembly for positioning within the deviating branch of a body vessel. The portion of the stent positioned within the first body vessel and the portion positioned within the main branch vessel have largely different sized diameters. The middle region tapers steeply to bridge this diameter differential. The tapered middle region also angles the side branch assembly which can easily be extended at an angle to the main body of the stent.
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Citations
15 Claims
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1. A bifurcated stent having an unexpanded state and an expanded state, the stent constructed of a plurality of interconnected strut members forming a plurality of expansion columns along a length of the stent, the stent comprising:
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a generally tubular first body defining a first lumen, the first body having a side opening bounded by a perimeter, a distal region distal to the side opening and having a distal region diameter, a proximal region proximal to the side opening and having a proximal region diameter, and a medial region between the distal and proximal regions, wherein the medial region defines the side opening, wherein the medial region comprises at least three axially spaced expansion columns, each expansion column has a plurality of undulations, a continuous length including the undulations, and a diameter, the at least three axially spaced expansion columns comprise a proximal most expansion column at a proximal end of the medial region, a distal most expansion column at a distal end of the medial region, and at least one intermediate expansion column therebetween, wherein the proximal most expansion column and the distal most expansion column have different maximum expansion capacities, wherein the continuous length of the proximal most expansion column of the medial region is greater than the continuous length of the at least one intermediate expansion column, and the continuous length of the at least one intermediate expansion column is greater than the continuous length of the distal most expansion column of the medial region; wherein, in the expanded state, the proximal region diameter is greater than the distal region diameter, wherein the proximal region diameter and the distal region diameter differ in size by one magnitude selected from the inclusive range of 18% to 35%; wherein the medial region has a tapering diameter transitioning from a maximum diameter equal to the proximal region diameter at a proximal end of the medial region to a minimum diameter equal to the distal region diameter size at a distal end of the medial region, and a second body comprising at least two projecting members, wherein, in the expanded state, at least one of the projecting members of the second body extends obliquely from the first body, and the projecting members define a second lumen therethrough, and the second lumen is in fluid communication with the first lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A bifurcated stent comprising:
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a generally tubular first body defining a first lumen, the first body having a side opening bounded by a perimeter, a distal region distal to the side opening and having a diameter, a proximal region proximal to the side opening and having a diameter, and a medial region between the distal and proximal regions, wherein the medial region defines the side opening, wherein the medial region comprises four axially spaced expansion columns, wherein each expansion column of the medial region has a plurality of undulations, a continuous length including the undulations, and a diameter, wherein, from a proximal end to a distal end of the medial region, the four axially spaced expansion columns of the medial region comprise a first expansion column, a second expansion column, a third expansion column, and a fourth expansion column, wherein the first expansion column and the fourth expansion column have different maximum expansion capacities, wherein the continuous length of the first expansion column is greater than the continuous length of the second expansion column, and the continuous length of the second expansion column is greater than the continuous length of the fourth expansion column of the medial region; wherein the distal region diameter and proximal region diameter of the first body have different sizes, the proximal region diameter size being greater than the distal region diameter size, the medial region has a tapering diameter transitioning from a maximum diameter equal to the proximal region diameter size at a proximal end of the medial region to a minimum diameter equal to the distal region diameter size at a distal end of the medial region, and a second body comprising at least two projecting members, wherein, in an expanded state, at least one of the projecting members of the second body extends obliquely from the first body, and the projecting members define a second lumen therethrough, and the second lumen is in fluid communication with the first lumen. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification