Method for Forming Catheter Balloon

A method of making a balloon catheter comprising:

• a) providing an elongated shaft having a proximal end and a distal end and an inflation lumen extending therein;
• b) providing a multilayer tube comprising a first layer of a first elastomeric polymeric material and a second layer of a second elastomeric polymeric material, the second elastomeric polymeric material having a lower maximum blow up ratio (BUR) than the first elastomeric polymeric material, and the multilayer tube having an inner diameter and an outer diameter, wherein the second layer is an outer layer relative to the first layer;
• c) forming a multilayer balloon by blow-molding the multilayer tube such that the multilayer balloon is blown, in at least a first stage, to a final working radial dimension, and further wherein the ADDR of the multilayer balloon after formation is approximately 2.0;
• and
• d) securing the multilayer balloon on a distal section of the shaft with an interior of the multilayer balloon in fluid communication with the inflation lumen.