Flared stents and apparatus and methods for making and using...

Details Flared stents and apparatus and methods for making and using... Flared stents and apparatus and methods for making and using...

A - Human Necessities

61

F

A61F 2/82 (2006.01) A61F 2/84 (2006.01)

Patent

CA 2619429

Flared stents are disclosed, and apparatus and methods for delivering such stents into a bifurcation between a main vessel and a branch vessel. A flared stent (40) includes a flaring portion (42) and a main portion (43) connected to the flaring portion, properties of which may vary along its length. In one embodiment, the main portion includes a plurality of bands of cells spaced apart axially from one another, adjacent bands of cells being intermittently connected to one another. During use, the stent is introduced into a main vessel in a contracted condition and positioned with the flaring portion adjacent an ostium. The flaring portion is flared, and the stent is advanced at least partially into the ostium. The stent is expanded further such that the main portion expands within the branch body lumen and/or the flaring portion expands adjacent the ostium.

L'invention concerne des stents évasés, un appareil et des procédés permettant de distribuer ces stents dans une bifurcation entre un vaisseau principal et une branche vasculaire. Un stent évasé (40) comprend une partie d'évasement (42) et une partie principale (43) connectée à ladite partie d'évasement dont les propriétés varient en fonction de sa longueur. Dans un mode de réalisation, la partie principale comprend une pluralité de bandes de cellules espacées axialement les unes des autres, des bandes adjacentes de cellules étant connectées de façon discontinue les unes avec les autres. Au cours de son utilisation, on introduit le stent à l'état rétracté dans un vaisseau principal et on positionne la partie d'évasement adjacente à un ostium. La partie d'évasement est évasée et le stent progresse au moins partiellement dans l'ostium. Puis, le stent se déploie de sorte que la partie principale se déploie dans une lumière de corps de branche et/ou la partie d'évasement se déploie adjacente à l'ostium.

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