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RADIOPAQUE INTRALUMINAL STENTS COMPRISING COBALT-BASED ALLOYS CONTAINING ONE OR MORE PLATINUM GROUP METALS, REFRACTORY METALS, OR COMBINATIONS THEREOF
RADIOPAQUE INTRALUMINAL STENTS COMPRISING COBALT-BASED ALLOYS CONTAINING ONE OR MORE PLATINUM GROUP METALS, REFRACTORY METALS, OR COMBINATIONS THEREOF
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机译:射线不透管腔内支架,包含一种或多种铂族金属,难熔金属或它们的组合的钴基合金
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摘要
Embodiments are directed to radiopaque implantable structures (e.g., stents) formed of cobalt-based alloys that comprise cobalt, chromium and one or more platinum group metals, refractory metals, precious metals, or combinations thereof. Platinum group metals include platinum, palladium, ruthenium, rhodium, osmium, and iridium. Refractory metals include zirconium, niobium, rhodium, molybdenum, hafnium, tantalum, tungsten, rhenium, and precious metals include silver and gold. In one embodiment, the one or more included platinum group or refractory metals substitute at least partially for nickel, such that the alloy exhibits reduced nickel content, or is substantially nickel free. The stents exhibit improved radiopacity as compared to similar alloys including greater amounts of nickel.
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