CRYOGENIC BALLOON WITH GREATER SIZE ADJUSTABILITY AT LOWER INFLATION PRESSURES

摘要

A balloon catheter (218) for an intravascular catheter system (210) includes a cryogenic balloon (236) that is formed from a blend of polyurethane and polyamide block copolymer. The percentages of polyurethane and polyamide block copolymer can vary. For example, the cryogenic balloon (236) can be formed from greater than 50% polyurethane and less than 50% polyamide block copolymer; greater than 75% polyurethane and less than 25% polyamide block copolymer; or approximately 85% polyurethane and approximately 15% polyamide block copolymer. Additionally, a ratio of a change in inflation pressure (in psi) to a change in outer diameter (in mm) of the cryogenic balloon (236), and a ratio of outer diameter (in mm) of the cryogenic balloon (236) to inflation pressure (in psig) can be varied to form the desired cryogenic balloon (236).