Flexible stretch stent-graft

A - Human Necessities – 61 – F

Patent

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A61F 2/06 (2006.01)

Patent

CA 2643720

A stent device (10) comprises a first graft member (20) , a second graft member and a stent frame (12) defining a central axis. The frame has an abluminal surface engaged with the first graft member and a luminal surface engaged with the second graft member such that the first graft member and the second graft member encapsulates the stent frame along the length of the central axis. The stent frame includes a configuration where the stent frame is disposed on a curvature such that the abluminal surface has a radius of curvature of approximately 20 millimeters about a center of the curvature and the luminal surface defines a substantially constant effective cross-sectional area at any portion generally transverse to the central axis of the stent frame disposed about the curvature.

L'invention concerne un dispositif (10) de stent comportant un premier élément (20) de greffon, un deuxième élément de greffon et une armature (12) de stent définissant un axe de symétrie. L'armature présente une surface abluminale interagissant avec le premier élément de greffon et une surface luminale interagissant avec le deuxième élément de greffon, de sorte que le premier élément de greffon et le deuxième élément de greffon enrobent l'armature de stent sur une certaine longueur de l'axe de symétrie. L'armature de stent comprend une configuration où l'armature de stent est disposée selon une courbure telle que la surface abluminale présente un rayon de courbure d'environ 20 millimètres autour d'un centre de courbure et la surface luminale définit une aire efficace en section droite sensiblement constante au niveau d'une partie généralement transversale par rapport à l'axe de symétrie de l'armature de stent disposée selon la courbure en question.

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