Patent ID: 7842081

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 from other cells of the stent; the side branch structure comprising a first serpentine ring extending around the inner side branch cell, the first serpentine ring comprising alternating struts and turns, the turns comprising alternating first inner turns and first outer turns, each strut having curvature along its length, the curvature of each strut being concave with respect to a center point of the inner side branch cell, the side branch structure further comprising a second serpentine ring extending around the first serpentine ring, the second serpentine ring comprising alternating struts and turns, the struts being concave with respect to the center point and the turns comprising alternating second inner turns and second outer turns, each first outer turn connected to a said second inner turn by a connection, each said connection having a connection width and having a connection length as measured between the turns that are connected by said connection, said connection length being less than or equal to said connection width.