Patent ID: 7842082

Claim:
A stent comprising: a plurality of interconnected framework members defining a plurality of cells, a portion of the interconnected framework members comprising a side branch structure defining an inner side branch cell, the inner side branch cell being shaped differently than other cells of the stent; the side branch structure comprising: a first serpentine ring extending around and defining the inner side branch cell, the first serpentine ring comprising alternating inner turns and outer turns, the outer turns aligned upon a first reference circle; a second serpentine ring circumferentially surrounding the first serpentine ring, the second serpentine ring comprising alternating inner turns and outer turns, the inner turns aligned upon a second reference circle; and a plurality of inner side branch connectors, each inner side branch connector spanning between the first serpentine ring and the second serpentine ring in a side branch radial direction; wherein the first reference circle has a greater diameter than the second reference circle.