Valved prostheses with reinforced polymer leaflets

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/24 (2006.01)

Patent

CA 2420049

A valve prosthesis includes a plurality of commissures and improved reinforced polymer leaflets extending between the commissures. The leaflets are formed from a polymer and have a reinforced free edge. The reinforced free edge can include a reinforcing member. In some embodiments, the leaflets have a reinforced free edge and a substantially uniform composition and thickness over the remaining body of the leaflet. In preferred embodiments, the reinforced edge of the leaflet preferably has a flexural rigidity no more than a factor of three greater than the unreinforced portion of the leaflet. In some embodiments, a reinforcing polymer layer supplies increased strength to the leaflet.

L'invention concerne une prothèse à valve comportant une pluralité de commissures ainsi que des valves polymères renforcées améliorées s'étendant entre les commissures. Les valves sont réalisées dans un polymère et présentent un bord libre renforcé. Le bord libre renforcé peut comporter un élément de renfort. Dans certains modes de réalisation, les valves présentent un bord libre renforcé, ainsi qu'une composition et une épaisseur essentiellement uniformes au dessus du restant de la valve. Dans les modes de réalisation préférés, le bord renforcé de la valve présente une rigidité à la flexion inférieure à trois fois la rigidité de la partie non renforcée de la valve. Dans certains modes de réalisation, une couche polymère de renfort confère une résistance améliorée à la valve.

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