Balloon for dilating a stricture and balloon catheter

摘要

The invention provides a balloon being able to be fixed to the stricture without fail when the balloon is inflated and the stricture can be dilated properly and safely, and the balloon can be inflated and deflated by a change in inside pressure and has a dilation function portion having the function of contacting tightly to the stricture portion of a lumen and dilating the stricture by pressure, and a first fixing portion and a second fixing portion located on proximal end and distal end sides of the dilation function portion, respectively and having the function of fixing the balloon to the lumen,   wherein when the minimum outer diameter of the dilation function portion under first dilation pressure at which the dilation function portion dilates to a predetermined diameter is represented by D0, the maximum outer diameter of the first fixing portion is represented by D1 and the maximum outer diameter of the second fixing portion is represented by D2, the balloon is molded to satisfy D0 D1 and D0 D2.