Patent Number: 6,569,194

Title: Thermoelastic and superelastic Ni-Ti-W alloy

Abstract: A radiopaque nitinol stent for implantation in a body lumen is disclosed. The stent is made from a superelastic alloy such as nickel-titanium or nitinol, and includes a ternary element including tungsten. The added tungsten in specified amounts improve the radiopacity of the nitinol stent comparable to that of a stainless steel stent of the same strut pattern coated with a thin layer of gold. Furthermore, the nitinol stent has improved radiopacity yet retains its superelastic and shape memory behavior and further maintains a thin strut/wall thickness for high flexibility.

Inventors: Pelton; Brian Lee (Menlo Park, CA)

Assignee: Advanced Cardiovascular Systems, Inc.

International Classification: A61F 2/06 (20060101); A61L 31/14 (20060101); A61L 31/02 (20060101); A61L 31/18 (20060101); C22F 1/00 (20060101); C22C 19/03 (20060101); A61F 2/00 (20060101); A61F 002/06 (); A61F 002/76 (); A61F 009/00 ()

Expiration Date: 05/27/2020