Abstract: A method for treatment of a vascular bifurcation, where a second blood vessel (22) branches from a first blood vessel (24), the first and second blood vessels having characteristic first and second diameters such that the first diameter is greater than the second diameter. The method includes introducing a balloon (30) in the first blood vessel into proximity to the vascular bifurcation. The balloon includes an inner part (32) and a collar (34) proximal to the inner part. The collar is inflated so that the collar expands to an expanded diameter greater than the second diameter but less than an outer diameter of an ostial funnel (26) of the second blood vessel. The balloon is advanced into the second blood vessel so that the inflated collar lodges within the ostial funnel. While the inflated collar is lodged within the ostial funnel, the inner part of the balloon is inflated so as to treat the second blood vessel.

Abstract: A stent (22) for the treatment of a vascular bifurcation includes a distal member (40) and a proximal member (42), the distal member and the proximal member comprising tubular bodies, the distal member comprising first struts (64, 66) oriented in the proximal direction and the proximal member including second struts (54, 56) oriented in the distal direction, such that at least one of the first struts is connected to at least one of the second struts on a first side of the stent (46), while on a second side (48) of the stent, opposite the first side, one or more of the first struts are unconnected to any of the second struts and one or more of the second struts are unconnected to any of the first struts.

Abstract: Apparatus for treatment of a vascular bifurcation, where a first blood vessel (24) meets a second blood vessel (26). The apparatus includes a balloon (40, 90) for deployment at the vascular bifurcation. The balloon includes a first part (42, 94), which has a first inflation characteristic and is adapted to be deployed in the first blood vessel, and a second part (44, 92), which has a second inflation characteristic, different from the first inflation characteristic, and is adapted to be deployed in the second blood vessel.