Helical High Fatigue Stent-Graft

摘要

An implantable prosthesis, including a generally tubular substrate and a continuous shape memory member disposed over the outer surface of the substrate. The shape memory member may include a series of zig-zag struts alternating between a first strut with a first length and a second strut with a second length different from the first length. A graft member may be positioned over the substrate and shape memory member.

主权项

1. An implantable prosthesis comprising:
a generally tubular substrate having inner and outer surfaces; a zigzag shape memory member helically disposed over the outer surface of the substrate at a helical angle and along a longitudinal axis from a first end to a second end; and a helically shaped graft member disposed on the zigzag shape memory member and having longitudinally spaced openings, wherein the openings have proximal and distal edges lying at an angle to the longitudinal axis substantially equal to the helical angle.