Patent ID: 7998187

Claim:
A stent graft comprising a connection socket, the stent graft comprising a tubular body of a biocompatible material, the tubular body being of a selected diameter and comprising an outside surface, the connection socket comprising a first expansion restricting structure ring around the tubular body at one end thereof and a second expansion restricting structure ring spaced apart along the tubular body from the first ring, wherein the first ring comprises a first wire formed from a material selected from shape memory alloy and stainless steel and the second ring comprises a second wire formed from a material selected from shape memory alloy and stainless steel, the first ring comprising at least two turns of the first wire with each end of the first wire terminating in a loop and the second ring comprising at least two turns of the second wire with each end of the second wire terminating in a loop, the first ring and the second ring being fastened to the tubular body by stitching of the respective loops on the respective rings to the biocompatible graft material whereby to prevent the respective rings from being expanded by pressure of a self expanding or balloon expandable stent placed therein and expanded, the first ring and the second ring being of lesser diameter than the selected diameter of the tubular body, and a zigzag self contracting stent between the first ring and the second ring, the self contracting stent comprising a shape memory wire and defining a cylindrical form having a diameter less than both the selected diameter of the tubular body and the diameter of the first and second rings.