| 摘要 |
PROBLEM TO BE SOLVED: To provide a balloon or the like which prevents slipping from a narrow section.SOLUTION: In a balloon 10 in a balloon catheter 29, a part of a first cylindrical part 11 tapers in a direction from the second cylindrical part 12 side to the middle of the first cylindrical part 11 or from the third cylindrical part 13 side to the middle of the first cylindrical part 11 in a case of non-treatment pressure. If a treatment pressure is applied and the baloon 10 is expanded, an expansion coefficient of the part of the first cylindrical part 11 which tapers during a non-treatment pressure is larger than an expansion coefficient of the reversely tapered side. |
