Removable embolus blood clot filter

G - Physics – 06 – F

Patent

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Details

G06F 17/10 (2006.01)

Patent

CA 2607580

A removable blood clot filter includes a number of locator members and anchor members disposed radially and extending angularly downward from a hub. The locator members include a number of linear portions having distinct axes configured to place a tip portion approximately parallel to the walls of a blood vessel when implanted and to apply sufficient force to the vessel walls to position the filter near the vessel centerline. The anchor members each include a hook configured to penetrate the vessel wall to prevent longitudinal movement due to blood flow. The hooks may have a cross section sized to allow for a larger radius of curvature under strain so that the filter can be removed without damaging the vessel wall.

La présente invention se rapporte à un filtre amovible pour caillot sanguin qui comprend un certain nombre d'éléments de positionnement et d'éléments d'ancrage disposés radialement et s'étendant en formant un angle vers le bas à partir d'une embase. Les éléments de localisation incluent un certain nombre de parties linéaires ayant des axes distincts conçus pour placer une partie d'extrémité de manière sensiblement parallèle aux parois d'un vaisseau sanguin après implantation et pour appliquer une force suffisante sur les parois du vaisseau de sorte que le filtre soit positionné à proximité de la ligne médiane du vaisseau. Les éléments d'ancrage comportent chacun un crochet conçu pour pénétrer dans la paroi du vaisseau de manière à empêcher le déplacement longitudinal du au flux sanguin. Les crochets peuvent comporter une section transversale dimensionnée de manière à permettre une sous-tension à rayon de courbure supérieur permettant le retrait du filtre sans endommagement de la paroi du vaisseau.

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