Intravascular filter

Details Intravascular filter Intravascular filter

A - Human Necessities

61

F

A61F 2/01 (2006.01)

Patent

CA 2415704

An intravascular filter (10) includes a first flexible elongated member (12) configured to assume a retention configuration, preferably of generally helical form extending for at least about two turns about a central axis (14), and a second flexible elongated member (16) connected to first member (12) at at least two spaced apart connection positions chosen such that approximetaly equal lengths of the first and second members lie between the connection positions. The second member (16) is configured to assume a predefined filter form lying generally within the helical form in such a manner as to form an obstacle to passage through the substantially helical configuration, in a direction parallel to central axis (14), of particles having dimensions greater than the predefined value. The first and second flexible elongated members are prepared in a generally straight configuration to facilitate minimally invasive deployment.

Ce filtre intra-vasculaire (10), qui comporte un premier élément souple de forme allongée (12), configuré pour adopter une configuration de retenue, de préférence, de forme généralement hélicoïdale, formant au moins deux tours autour d'un axe central (14), comporte également un second élément souple de forme allongée (16), connecté au premier (12) au niveau d'au moins deux emplacements de connexion distincts choisis de manière que des longueurs approximativement égales des deux éléments se trouvent entre eux. Le second élément (16) est configuré pour adopter une forme prédéfinie de filtre situé, d'ordinaire, à l'intérieur de la forme hélicoïdale, de manière à constituer un obstacle au passage de particules dont les dimensions sont supérieures à une valeur prédéterminée à travers la configuration sensiblement hélicoïdale, dans une direction parallèle à l'axe central (14). Le premier et le second élément souple de forme allongée ont une configuration sensiblement droite afin de faciliter un déploiement qui soit le moins effractif possible.

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