Balloon catheter and method for producing same

A method for producing a balloon catheter, the method comprising:

• preparing a resin block having a plurality of protrusions in a cross section that is perpendicular to a long axis direction, each of the plurality of protrusions having a protrusion direction that has a one-circumferential-direction component;
• preparing a hollow mold;
• and
• placing the resin block inside the mold,
• wherein the balloon catheter comprises:
• a shaft having a distal side and a proximal side;
• and
• a balloon provided at the distal side of the shaft,
• wherein:
• the balloon has a plurality of wings in a deflated state,
• each of the wings has a projection on an outer surface in a wrapped state, and
• each of the projections has a projecting direction, which is opposite to a wrapping direction of the wing,
• in a cross section that is perpendicular to a long axis direction of the balloon, a base of the projection has a base first end part farther from a tip of the wing and a base second end part closer to the tip of the wing,
• a tip of the projection is closer to a base of the wing with respect to a line passing through the base first end part which is perpendicular to a line passing through the base first end part and the base second end part,
• the line passing through the base first end part which is perpendicular to the line passing through the base first end part and the base second end part as a boundary line, the base second end part is located on a side of the boundary line where the tip of the wing exists, and
• the line passing through the base first end part which is perpendicular to the line passing through the base first end part and the base second end part as a boundary line, the tip of the projection is located on a side of the boundary line where the base second end part does not exist.