Catheter balloon with retraction coating

A balloon for a dilatation catheter comprising a balloon wall, the wall having a central body portion with an exterior set coating of a polymer thereon, the coating being set in a predetermined folded, deflated configuration of the balloon wherein the coating material and thickness are selected to provide the balloon with the property that the balloon will return to the predetermined folded configuration upon deflation after inflation to a pressure of at least 9 atm and the coating having a thickness, double-wall basis, within the range of 0.0001 to 0.0015 inches.

A balloon for a dilatation catheter comprising a balloon wall made of a wall material, the balloon having a central body portion, and a substantially uniform exterior set coating of a polymer on said central body portion, the coating being set in a predetermined folded deflated configuration of the balloon wherein the coating material and coating thickness are selected so that the balloon is provided with the property that the balloon will return to the predetermined folded configuration upon deflation after it has been inflated to a pressure which is at least one atmosphere higher than the pressure which the same balloon, absent said coating, would withstand and return to its predetermined folded configuration.