PLATINUM - STAINLESS STEEL ALLOY AND RADIOPAQUE STENTS

• Main Authors: TROZERA, THOMAS, A, RADISCH, HERBERT, R., JR, GIRTON, TIMOTHY, S, STINSON, JONATHAN, S, CRAIG, CHARLES, H, KNAPP, DAVID, M
• Format: Patent
• Language: English; French; German
• Published: 27.04.2011
• Subjects: ALLOYS; BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES; CHEMISTRY; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; FERROUS OR NON-FERROUS ALLOYS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HUMAN NECESSITIES; HYGIENE; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; METALLURGY OF IRON; METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OR PROTECTION OF EYES OR EARS

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.