Vascular grafts and methods for bridging a vessel side branch

A - Human Necessities – 61 – F

Patent

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A61F 2/06 (2006.01)

Patent

CA 2392659

A vascular graft (20) for a primary vessel (22) adapted to bridge a side branch (24). The graft is especially useful for providing a support tube for a primary graft in the primary vessel on one side of the side branch. The graft includes first and second tubular sections separated by a gap. A bridging member (54) connects the first (50) and second tubular sections (52) across the gap and may include a relatively rigid strut to prohibit relative axial movement of the two sections. There may be one, two or more bridging members to define one, two or more apertures through which blood can flow from within the graft through to the vessel side branch. The graft may include a flexible, desirably fabric, body supported by a wireform stent that is either self- or balloon-expandable. The graft may be deployed within the abdominal aorta on both sides of the renal arteries and have two apertures for blood to flow from the aorta to the renals. The infra-renal section provides a uniform uniform tubular anchoring surface for a trunk portion of a bifurcated graft used to repair an abdominal aneurysm extending to the iliac arteries.

Selon cette invention, un greffon vasculaire (20) d'un vaisseau primaire (22) est adapté pour raccorder sous forme de pont une ramification latérale (24). Le greffon est notamment utilisé pour former un tube support destiné à un greffon primaire d'un vaisseau primaire sur un côté de la ramification latérale. Le greffon comprend des première et seconde sections tubulaires séparées par un vide. Un élément de raccordement (54) raccorde sous forme de pont les première (50) et seconde sections tubulaires (52) en chevauchant le vide et peut comporter un élément de soutien relativement rigide qui empêche le déplacement axial relatif des deux sections. Il peut y avoir un, deux, trois éléments de raccordement ou plus pour former un, deux ou plusieurs orifices par lesquels le sang peut s'écouler de l'intérieur du greffon pour traverser la ramification latérale du vaisseau. Le greffon peut comprendre un corps flexible, de préférence en tissu, supporté par un stent en forme de fil métallique qui peut être auto-expansible ou se déployer à l'aide d'un ballon. Le greffon peut être déployé dans l'aorte abdominale des deux côtés des artères rénales et possède deux orifices pour l'écoulement du sang de l'aorte aux artères rénales. La section infra-rénale forme une surface d'ancrage tubulaire uniforme d'une partie tronc d'un greffon bifurqué utilisé pour réparer un anévrisme abdominal s'étendant aux artères iliaques.

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