ELASTOMERIC LEAFLET FOR PROSTHETIC HEART VALVES

A leaflet for a prosthetic valve formed of at least one layer that includes a composite material containing at least one expanded fluoropolymer membrane and an elastomer. The composite material exhibits an increase in stiffness when elongated to at least about 30% strain. The fluoropolymer may be po...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BRUCHMAN, William, C, WHITE, Charles, F
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES DISINFECTION, STERILISATION, OR DEODORISATION OF AIR HUMAN NECESSITIES HYGIENE MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES MEDICAL OR VETERINARY SCIENCE METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL
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Beschreibung
Zusammenfassung:	A leaflet for a prosthetic valve formed of at least one layer that includes a composite material containing at least one expanded fluoropolymer membrane and an elastomer. The composite material exhibits an increase in stiffness when elongated to at least about 30% strain. The fluoropolymer may be polytetrafluoroethylene. The elasticity within the leaflets permits, among other things, the leaflets to bend with a reduced occurrence of wrinkles as the valve opens and closes. The elastic properties of the leaflet also, among other things, improve bending properties and reduce closure stresses, thereby extending the life of the leaflet.