Patent ID: 7682306

Claim:
A method of therapeutic intervention for treatment of a patient in need of such treatment, said method comprising: introducing to a physiological locus of said patient a balloon formed from two vacuum thermoformed half-sections of a multilayer film comprising: (A) a layer of sealing film, having main top and bottom surfaces; and (B) at least one layer of thermoplastic polymer film, disposed along least one of the main top and bottom surfaces of the sealing film; wherein the sealing film has a composition and thickness imparting gas barrier character to the multilayer film and wherein the at least one layer of thermoplastic polymer film alone lacks such gas barrier character; wherein the half-sections are processed in a vacuum thermoforming die, and the vacuum thermoformed half-sections are bonded together along peripheral portions thereof to form a peripheral seam; and wherein the balloon comprises an inflation element adapted to permit the inflation of the balloon at said physiological locus with a fluid; and inflating the balloon, yielding a balloon that is non-pillowed and generally spherical or flattened spherical in shape.