Method of construction of a balloon catheter

The method of manufacturing a balloon catheter comprising the steps of

• (a.) providing a cylindrical mold having a central portion of greater diameter than each end portion;
• (b.) providing a length of substantially 80A durometer polyurethane tubing having a wall thickness of substantially 0.004 inches;
• (c.) inserting said tubing into said mold;
• (d.) closing one end of said tubing;
• (e.) immersing said mold and said tubing in a bath of warm water of a selected temperature for a selected time;
• (f.) introducing pressurized air into said tubing to expand said tubing into said mold to create a balloon;
• (g.) immersing said mold and said tubing in a bath of cold water of a selected temperature for a selected time;
• (h.) withdrawing said air pressure to produce a vacuum to collapse said balloon;
• (i.) withdrawing said balloon from said mold;
• (j.) providing a catheter comprising a length of polyurethane tubing;
• (k.) producing a fluid port in the wall of said catheter at one end;
• (l.) placing one end of said balloon above said port and bonding said end with a solvent to said catheter to form a bonded juncture and everting the opposite end of said balloon over said end and bonding said opposite end to said catheter below said port to form another bonded juncture and thereby enclose said port;
• and
• (m.) disposing a ring of epoxy on each of the bonded junctures of said balloon and said catheter.