Provided are devices and methods for flaring a stent deployed within a branch vessel that includes an ostium in communication with a main vessel, the first end of the stent extending at least partially from the branch. A catheter is provided that includes a balloon having a reinforced region adjacent to a non-reinforced region. When the balloon is placed in a desired location, such as a stent, prosthetic valve, or other tubular prosthesis, the balloon is inflated to a first pressure and the reinforced and unreinforced regions expand substantially simultaneously. When the balloon is inflated above the first pressure, the reinforced region of the balloon remains at the first diameter and the unreinforced region continues to expand, for example flaring one or more ends of the prosthesis. [Selection diagram] Figure 1主血管と連通する小孔を含む枝血管内に配備されたステントをフレアするための装置および方法が提供され、ステントの第１の端部は枝から少なくとも部分的に延びる。非補強領域に隣接する補強領域を有するバルーンを含むカテーテルが提供される。バルーンが所望の位置、例えばステント、人工弁、または他の管状プロテーゼ内に配置されると、バルーンは第１圧力まで膨張され、補強領域と非補強領域が実質的に同時に拡張する。第１の圧力を超えてバルーンが膨張すると、バルーンの補強領域は第１の直径のままで、非補強領域が拡張し続け、例えば、プロテーゼの１以上の端部をフレア状に広げる。【選択図】図１
