Patent ID: 8394055

Claim:
A balloon catheter, comprising: an elongate catheter shaft having a proximal section, a distal section, and an inflation lumen; and a multilayer balloon on the distal section of the shaft, the multilayer balloon comprising: at least a first layer and a second layer having a combined wall thickness; the first layer made of a first polymer material having a first maximum blow-up-ratio; the second layer made of a second polymer material having a second maximum blow-up-ratio greater than the first maximum blow-up-ratio, wherein the second layer is an inner layer relative to the first layer; and the at least first and second layers defining a compliance less than that of a single layer balloon made of the first polymer material with a wall thickness equal to the combined wall thickness; wherein the multilayer balloon has a nominal working diameter corresponding to an inner mold diameter used to form the balloon, and at least the second layer is substantially at the second maximum blow-up-ratio when the multilayer balloon is substantially at the nominal working diameter.