| 摘要 |
A medical balloon catheter, characterized in that groove parts and/or projected parts spirally formed relative to the major axis of a balloon are formed in and/or on the balloon. By this structure, even after the balloon is temporarily expanded, for example, when the catheter is pushed into a high constriction degree of a lesion region having a diameter smaller than the contracted shape of the balloon or taken out after passing the lesion region, the catheter can be further wound easily to reduce a push-in resistance.
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