Sigmoid valve and method for its percutaneous implantation

A - Human Necessities – 61 – F

Patent

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A61F 2/24 (2006.01)

Patent

CA 2522018

A multi-leaflet valve (15) adapted to serve as a prosthesis for diseased native valve of a mammal is incorporated in self-expandable or inflatable endovascular stents or stents (27,28) to form a combination which is introduced on a catheter with a guide wire into the circulatory system of the mammal to replace the diseased native valve. Once the combination is at the desired location the stent is caused to expand and affix itself to the patient's vessel wall. The prosthetic valve has the shape of a truncated cone that has an inflow and an outflow orifice with leaflets forming the outflow orifice and forming a plurality of commissures. A first flexible circular support (17) is affixed in a substantially circular fashion around the truncated cone in proximity of the inflow orifice, and a second flexible circular support (18) is affixed at the location of the commissures to form a circle around the truncated cone in proximity of the outflow orifice. The circular supports maintain the shape of the valve during the surgical implantation procedure and thereafter.

L'invention concerne une valvule à valves multiples, conçue pour servir de prothèse pour une valvule native malade d'un mammifère; la valvule est introduite dans un extenseur gonflable ou qui se dilate de façon autonome pour former une combinaison qui sera introduite au moyen d'un cathéter dans le système circulatoire du mammifère pour remplacer la valvule native du mammifère. Une fois la combinaison sur le site désiré, l'extenseur se dilate de manière à se fixer à la paroi du vaisseau du patient. La valvule prosthétique a la forme d'un cône tronqué qui possède un orifice d'entrée et de sortie, avec des valves formant l'orifice de sortie et une pluralité de commissures. Un premier support circulaire flexible est fixé de façon sensiblement circulaire autour du cône tronqué, à proximité de l'orifice d'entrée, et un deuxième support circulaire flexible est fixé sur le site des commissures de manière à former un cercle autour du cône tronqué à proximité de l'orifice de sortie. Les supports circulaires maintiennent la forme de la valvule pendant l'opération d'implantation chirurgicale et après celle-ci.

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