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THERMOELASTIC AND SUPERELASTIC NI-TI-W ALLOY
THERMOELASTIC AND SUPERELASTIC NI-TI-W ALLOY
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机译:热弹性和超弹性镍钛合金
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摘要
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.
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