HIGH PRESSURE LOW COST MULTILAYER BALLOON CATHETER

摘要

Ballon catheter (20) with a multilayer shaft (22) with integral balloon (24) and a total length of at least 70 cm and method of forming the multilayer shaft comprising: a first stretching step wherein a portion of a distal end region of a multilayer polymeric tube is stretched at a first pressure and a first temperature, and the first pressure is equal to ambient pressure; a second stretching step wherein the multilayer polymeric tube is stretched at a second pressure and the first temperature until the desired final length, and the second pressure is greater than the first pressure; a third stretching step wherein the multilayer polymeric tube is stretched at a third pressure and the first temperature having a final stretched length, and the third pressure is less than the second pressure and greater than the first pressure; and a balloon forming step.