Medical devices, particularly stents, and methods for their manufacture

A medical device which includes a component formed from an alloy which contains at least about 40% Ni by weight. The alloy in a 10 nm deep surface region of the component contains not more than about 10% Ni by weight. The Ni content in that surface region can be reduced by polishing and oxidizing tr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PELTON ALAN R, TREPANIER CHRISTINE
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR BANDAGES, DRESSINGS OR ABSORBENT PADS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MEDICAL OR VETERINARY SCIENCE METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS PROSTHESES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OR PROTECTION OF EYES OR EARS
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Beschreibung
Zusammenfassung:	A medical device which includes a component formed from an alloy which contains at least about 40% Ni by weight. The alloy in a 10 nm deep surface region of the component contains not more than about 10% Ni by weight. The Ni content in that surface region can be reduced by polishing and oxidizing treatment such as (a) exposure to superheated steam, or (b) immersion in a chemical solution, or (c) an electrochemical treatment, using the device as the anode in a solution bath with a current running therethrough.