Patent ID: 8118861

Claim:
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, 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.