Device allowing the treatment of bodily conduits at an area of a bifurcation

摘要

The device includes a stent and a separating device, the stent having a number of areas of separation and the separating device being able to be introduced through the wall of the stent at an area of separation. According to embodiments of the invention, each area of separation has a number of separable junctions; the activation of the separating device separates at least one of the separable junctions of the area of separation so as to separate the stent into two stent sections at the area of the bifurcation and to allow the stent sections to further expand to respectively conform to a shape of the main conduit and to a shape of the secondary conduit at the area of the bifurcation.

主权项

1. A device allowing treatment of bodily conduits at an area of a bifurcation, the device comprising a stent and a separating means, the stent having a plurality of areas of separation and the separating means being able to be introduced through a wall of the stent at one or more of the plurality of areas of separation and to exert a breaking force;
wherein: the stent is a self-expanding stent capable of having two states of expansion, a first state in which the stent has a first cross-sectional area and a second state in which the stent has a second cross-sectional area larger than said first cross-sectional area; each said plurality of areas of separation has a number of bridge structures that form separable junctions, by which a medial portion of the stent is maintained in the first state of expansion when ends of the stent are maintained in this first state of expansion; the breaking force provided by the separating means is sufficient to break at least one separable junction of said one or more of the plurality of areas of separation so as to break the self-expanded stent into two stent sections at the area of the bifurcation and to allow at least one of the stent sections to further self-expand to said second state of expansion, in which said at least one stent section conforms to a shape of a main conduit and/or to a shape of a secondary conduit at the area of the bifurcation; the main conduit has an expanding frustoconical shape in the area of the bifurcation; and the second cross-sectional area is at least 125% more than a cross-sectional area of the main conduit at a narrower end of the frustoconical shape.