Balloon for balloon catheter and balloon catheter including same

A balloon for a balloon catheter comprising:

• a straight tube portion;
• a proximal-side tapered portion positioned on a proximal side of the straight tube portion;
• a proximal-side sleeve portion positioned on a proximal side of the proximal-side tapered portion;
• a distal-side tapered portion positioned on a distal side of the straight tube portion;
• a distal-side sleeve portion positioned on a distal side of the distal-side tapered portion;
• a balloon main body having an outer surface and an inner surface;
• and
• a protruding portion protruding radially outward from the outer surface of the balloon main body and extending in a longitudinal axis direction,
• wherein the protruding portion in the straight tube portion has at least one notch (ST-portion notch), and the protruding portion in the distal-side tapered portion has at least one notch (DT-portion notch),
• wherein a depth D3 of the at least one ST-portion notch and a depth D4 of the at least one DT-portion notch are each 50 μm or more, and
• wherein the depth D3 of the at least one ST-portion notch, a height H3 of the protruding portion in the straight tube portion, the depth D4 of the at least one DT-portion notch, and a height H4 of the protruding portion in the distal-side tapered portion satisfy a relationship of D3/H3≤D4/H4.