SELF EXPANDING STENT

摘要

A self expanding stent (10) formed from a resilient wire. The resilient wire comprises a zig zag form including an odd number of struts (12) such as seven struts and a bend (14) between each strut. There is first loop (18) of the resilient wire at the terminal end of a first strut and a second loop (18) of the resilient wire at the terminal end of a last strut. The stent as formed is substantially planar but in use is formed into a substantially cylindrical form (20) by being stitched onto a tubular body of a biocompatible graft material with at least the first strut and the last strut overlapping.

主权项

1. A stent graft comprising:
a main body of graft material having a side wall; a proximal end; a distal end; a fenestration in the side wall; a side arm extending externally from the fenestration at an acute angle to the main body, the side arm comprising tube of graft material having a proximal open end, a distal open end, a distal open end diameter, reinforcement about the distal open comprising stitching, a first side, a second side and a front disposed opposite the main body, wherein the proximal open end is stitched to the main body at the fenestration to form a main body/side arm junction; a plurality of discrete stents along the length of the main body, wherein at least one of the plurality of stents comprises an internal stent, and at least another stent comprises an external intermediate stent disposed around both the main body and the side branch at the junction, wherein the intermediate stent comprises a zig zag stent having pairs of directly adjacent struts with one pair of struts adjacent struts flanking the front of the side arm, and wherein the distance between one pair of directly adjacent struts is different than the distance between another pair of directly adjacent struts; a side arm stent disposed adjacent the distal end of the side arm, the side arm stent having a diameter, wherein the diameter of the side arm stent is smaller than the diameter of the distal end of the side arm providing a compressive effect on the graft material at the distal end of the side arm.