Patent ID: 8734502

Claim:
A stent for implantation in a body vessel, the stent graft comprising: a self-expanding circumferential element comprising a first longitudinal region and a second longitudinal region, each region comprising struts, the second region being substantially parallel to and spaced across from the first region; the first region having struts having a longitudinal length greater than the struts of the second region; a plurality of struts disposed between the first region and the second region and circumferentially connects the first region and the second region; the struts disposed between the first region and the second region comprising varying longitudinal lengths that gradually decrease from the first region to the second region; wherein the struts of the first region and second region each comprise a diameter with the first region diameter less than the second region diameter; and where the diameters of the struts decrease from the second region diameter to the first region diameter, as the lengths of the struts increase, and where the rate of change in strut diameter per change in strut longitudinal length is substantially linear, such that the circumferential element produces a substantially constant outward radial force about the element circumference.