AUXILIARY BALLOON CATHETER

摘要

A balloon catheter (10) may comprise a primary inflation balloon (20) and a secondary inflation balloon (30) located to one side of the primary infla tion balloon. The secondary balloon comprises a first portion and a second p ortion, the first portion located closer to the primary balloon. The second portion has a greater size than the first portion, and a portion of the seco nd portion extends outwardly beyond the first portion and overhangs the firs t portion. In some embodiments, a cross-sectional shape of the secondary bal loon in an inflated state comprises a mushroom shape.