Bifurcated dual-balloon catheter system for bifurcated vessels

An inflatable apparatus for use in a bifurcated vessel having a main branch from which a side branch extends at an angle therefrom, comprising:

• a first balloon and a second balloon each having proximal and distal ends and proximal and distal portions;
• a conduit extending longitudinally through said first balloon from a first opening proximate the distal end of said first balloon to a second opening disposed between said proximal and distal ends of said first balloon;
• said second balloon being arranged such that its proximal portion is disposed within said conduit and its distal portion extends through the second opening;
• said first balloon being positionable within said main branch while the distal portion of said second balloon is positionable within said side branch such that when said first and second balloons are inflated with the proximal portion of the second balloon remaining within the conduit of the first balloon during inflation of the second balloon, said first balloon expands radially in said main branch while the distal portion of said second balloon maintains registration with said side branch by expanding radially therein,
• wherein the second balloon includes a pre-formed bend section located where the distal portion of the second balloon extends through the second opening of said first balloon, and wherein said bend section comprises an S-shaped bend adapted to enable the distal portion of said second balloon to remain substantially parallel to the first balloon during insertion, and to conform to the angle of the side branch during inflation.