Removable vena cava filter for reduced trauma in collapsed...

A - Human Necessities – 61 – F

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Details

A61F 2/01 (2006.01)

Patent

CA 2562688

The present invention provides a removable vena cava filter for capturing thrombi in a blood vessel. The filter (10) comprises a plurality of primary struts (12) having first ends attached together along a longitudinal axis. Each primary strut has an arcuate segment extending from the first end to an anchoring hook (26). The primary struts are configured to move between an expanded state for engaging the anchoring hooks with the blood vessel and a collapsed state for filter retrieval or delivery. Each primary strut is configured to cross another primary strut along the longitudinal axis in the collapsed state such that the arcuate segments occupy a first diameter (D1) greater than a second diameter (D2) occupied by the anchoring hooks in the collapsed state for filter retrieval or delivery.

Un filtre à veine profonde retirable permettant de capturer un thrombus dans un vaisseau sanguin. Le filtre comprend une pluralité de supports principaux ayant des premières extrémités fixées ensemble le long d'un axe longitudinal. Chaque support principal présente un segment arqué s'étendant depuis la première extrémité vers un crochet d'ancrage. Les supports principaux sont configurés de manière à se déplacer entre un état étendu permettant l'insertion de crochets d'ancrage dans le vaisseau sanguin et un état affaissé permettant la récupération du filtre ou son apport. Chaque support principal est configuré de manière à croiser un autre support principal le long de l'axe longitudinal à l'état affaissé de manière que les segments arqués occupent un premier diamètre supérieur au second diamètre qu'occupent les crochets d'ancrage à l'état affaissé en vue du retrait ou de l'apport du filtre.

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