Platinum - stainless steel alloy and radiopaque stents

Details Platinum - stainless steel alloy and radiopaque stents Platinum - stainless steel alloy and radiopaque stents

A - Human Necessities

61

L

A61L 31/18 (2006.01) A61L 31/02 (2006.01) C22C 5/04 (2006.01) C22C 38/00 (2006.01) C22C 38/44 (2006.01) C22C 38/50 (2006.01) C22C 38/58 (2006.01) C21D 8/02 (2006.01)

Patent

CA 2442205

A platinum enhanced radiopaque alloy particularly suitable for manufacture of implantable and/or intravascular medical devices. A stent is one preferred medical device which is a generally tubular structure that is expandable upon implantation in a vessel lumen to maintain flow therethrough. The stent is formed from the alloy which has improved radiopacity relative to present utilized stainless steel alloys. This alloy preferably contains from about 2 wt.% to about 50 wt.% platinum; from about 11 wt.% to about 18 wt.% chromium; about 5 wt.% to about 12 wt.% nickel and at least about 15 wt.% iron.

L'invention concerne un alliage radio-opaque amélioré de platine servant notamment à fabriquer des dispositifs médicaux implantables et/ou intravasculaires. Un stent est un dispositif médical préféré qui présente une structure généralement tubulaire extensible lors de son implantation dans une lumière du vaisseau afin de maintenir son flux. Le stent est formé à partir d'un alliage présentant une radio-opacité améliorée par rapport aux alliages en acier inoxydable utilisés actuellement. Cet alliage contient, de préférence, entre environ 2 et 50 % en poids de platine, environ 11 et 18 % en poids de chrome, environ 5 et 12 % en poids de nickel et au moins 15 % en poids de fer.

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