Balloon coating method and balloon rotating method

A balloon coating method for forming a coating layer on an outer surface of a balloon of a balloon catheter, the balloon coating method comprising:

• positioning the balloon of the balloon catheter adjacent a clamp, the balloon catheter comprising:
• a tubular shaft to which a proximal portion of the balloon is fixed at a proximal joined region in a fluid-tight manner;
• a tube to which a distal portion of the balloon is fixed at a distal joined region in a fluid-tight manner, the balloon including an inflatable region between the distal joined region and the proximal joined region;
• a guide wire lumen passing through a portion of the tubular shaft and through the balloon, the guide wire lumen possessing a distal open end and a proximal open end;
• a core member positioned in the guide wire lumen, the core member possessing a distal end protruding distally beyond the distal open end of the guide wire lumen and possessing a proximal end protruding proximally beyond the joined region;
• clamping a part of the balloon catheter that is distal of the inflatable region and a part of the core member using the clamp;
• and
• apply the coating liquid to the outer surface of the balloon by dispensing the coating liquid from an axially moving dispensing tube while rotating the balloon about an axis of the balloon.