Cardiac valve procedure methods and devices

A - Human Necessities – 61 – F

Patent

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A61F 2/24 (2006.01) A61M 5/00 (2006.01)

Patent

CA 2361670

Devices and methods for performing intrvenous vascular procedures without cardiac bypass. The devices include various embodiments of temporary filter devices (10), temporary valves (26, 100), and prosthetic valves (80, 85, 86, 90). The temporary filter devices (10) have one or more cannulae (2) which provide access for surgical tools for effecting repair of the cardiac valves. A cannula (2) may have filters (3) of various configurations encircling the distal region of the cannula, which prevents embolism material from entering the coronary arteries, and aorta. In one embodiment, a set of valve leaflets (70, 71) extend peripherally from the filter to prevent blood flow through peripheral arteries. The temporary valve devices (26) may also have one or more cannulae (2') which guide insertion of the valve into the aorta. The valve devices (26) expand in the aorta to occupy the entire flow path of the vessel. In one embodiment, the temporary valve (26) is a disc of flexible, porous material that acts to filter blood passing therethrough. In another embodiment, the temporary valve (100) has leaflets (111) which act in concert to alternately block or allow blood flow.

La présente invention se rapporte à des dispositifs et à des procédés permettant d'effectuer des interventions intravasculaires sans pontage cardiaque. Ces dispositifs comprennent diverses réalisations de dispositifs filtrants temporaires (10), de valvules temporaires (26) et de valvules prothétiques (90). Les dispositifs filtrants temporaires (10) possèdent une ou plusieurs canules (2) qui permettent à des outils chirurgicaux d'accéder à des valvules cardiaques en vue de leur réparation. Une canule (2) peut comporter des filtres (3) de structures diverses autour de sa région distale, ce qui gène la pénétration de la matière embolique dans les artères coronaires, et l'aorte. Les dispositifs valvules temporaires (26) peuvent comporter une ou plusieurs canules (2') qui guident l'introduction de la valvule dans l'aorte. Ces dispositifs valvules (26) se déploient dans l'aorte de manière à occuper la totalité du chemin d'écoulement du vaisseau. Dans une réalisation, la valvule temporaire (26) est un disque composé d'un matériau souple et poreux qui sert à filtrer le sang le traversant. Plusieurs valves sont disposées en périphérie du disque. Ces valves peuvent, de manière alternée, s'affaisser pour empêcher l'écoulement sanguin dans la valvule et se déployer pour permettre ledit écoulement.

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