Valved prostheses with preformed tissue leaflets

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/24 (2006.01) A61L 27/36 (2006.01)

Patent

CA 2493535

Valved prostheses are described with crosslinked leaflets (102, 104, 106). At least one of the leaflets has a shape corresponding to a contoured surface. The leaflets are individually attached to the prostheses. Furthermore, in some embodiments, the leaflets do not comprise native leaflet tissue. Methods for forming tissue heart valve prostheses can comprise assembling a plurality of leaflets configured to open and close the valve in response to pressure differentials. Each of the plurality of leaflets is preformed individually when at least partially crosslinked in contact with a contoured surface. The individual crosslinked leaflets can be selected and matched for assembly into a valve. In general, the tissue, when it is crosslinked, has a size and shape approximately the size of a single human heart valve leaflet.

L'invention concerne des prothèses à valves constituées de valves réticulées (102, 104, 106). Au moins une des valves présente une forme correspondant à une surface profilée. Ces valves sont fixées individuellement aux prothèses. De plus, dans certains modes de réalisation, les valves ne comprennent pas de tissu natif. Les procédés permettant de former des prothèses de valvule cardiaque en tissu peuvent consister à assembler une pluralité de valves conçues pour ouvrir et fermer la valvule en réponse à des différences de pression. Chacune de ces valves est préformée individuellement lorsqu'elle réticulée au moins partiellement au contact d'une surface profilée. Les valves réticulées peuvent être sélectionnées et associées individuellement afin d'être assemblées dans une valvule. Généralement, le tissu, lorsqu'il est réticulé, présente une taille et une forme qui correspondent approximativement à la taille d'une seule valve de valvule cardiaque humaine.

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