Stent vascular intervention device and method

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/06 (2006.01) A61B 17/12 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2452953

The present invention relates to a stent including a variable porosity, tubular structure having pores defined by structural surfaces. The tubular structure has a low porosity region (6) on a path around the tubular structure, where the low porosity region is less porous than other regions (8) located on the path and fully or partially obstructs passage of fluid. The low porosity region (6) is larger than the structural surfaces (4) between adjacent pores (2). Also disclosed is a method of altering blood flow within and near an opening of a defective blood vessel involving deploying the above stent (600) of the present invention in a defective blood vessel (V) so that the low porosity region (602) is aligned to and in contact with an opening (O) in the defective blood vessel (V), thereby altering blood flow within and near the opening (O) of the defective blood vessel (V).

L'invention se rapporte à une endoprothèse comprenant une structure tubulaire à porosité variable et dotée de pores définis par des surfaces structurelles. Cette structure tubulaire présente une zone à faible porosité sur un trajet qui contourne la structure tubulaire, la zone à faible porosité étant moins poreuse que les autres zones situées sur le trajet et obstruant complètement ou en partie le passage d'un fluide. La zone à faible porosité est plus large que les surfaces structurelles entre les pores adjacents. L'invention concerne aussi un procédé de modification de flux sanguin à l'intérieur et près d'une ouverture d'un vaisseau sanguin défectueux consistant à déployer ladite endoprothèse dans le vaisseau sanguin défectueux de manière que la zone à faible porosité soit alignée et soit en contact avec une ouverture dans le vaisseau sanguin défectueux, ce qui permet de modifier le flux sanguin à l'intérieur et près de l'ouverture du vaisseau sanguin défectueux.

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