Radiopaque alloy stent

Details Radiopaque alloy stent Radiopaque alloy stent

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 38/40 (2006.01) C22C 38/44 (2006.01) C22C 38/58 (2006.01) C21D 8/02 (2006.01)

Patent

CA 2442200

The present invention is directed toward a stent fabricated from an austenitic 300 series stainless steel alloy having improved radiopaque characteristics. The modified stainless steel alloy consists essentially of, in weight percent, about (A) wherein variable "X" could be selected from a group consisting of Gold, Osmium, Palladium, Rhenium, Tantalum, Iridium, Ruthenium or Tungsten, and mixtures thereof. The alloy provides a unique combination of strength, ductility, corrosion resistance and other mechanical properties which also has improved radiopaque characteristics in the thin sections necessary to manufacture a stent.

La présente invention concerne un stent fabriqué dans un alliage d'acier inoxydable austénitique de série 300 présentant des caractéristiques améliorées de radio-opacité. L'alliage d'acier inoxydable amélioré comprend, environ, en pourcentage de poids, la variable "X" pouvant être prise dans le groupe composé d'or, osmium, palladium, rhénium, tantale, iridium, ruthénium ou tungstène, ainsi que de mélanges de ces éléments. Cet alliage, qui offre une combinaison unique en son genre de robustesse, de ductilité, de résistante à la corrosion et de diverses autres propriétés mécaniques, présente également des caractéristiques de radio-opacité améliorées dans les parties minces intervenant dans sa fabrication.

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