Patent ID: 9060754
Filing Date: 2015-06-23
Classification: A61B

Abstract:
1. A cryotherapeutic device, comprising: an elongated shaft having a distal portion, the shaft being configured to locate the distal portion intravascularly at a treatment site within or otherwise proximate a renal artery; a cooling assembly at the distal portion of the shaft, the cooling assembly having a low-profile delivery state and an expanded deployed state, the cooling assembly including an applicator having a first balloon that defines a chamber, and a second balloon adjacent to the first balloon and configured to thermally insulate a region of tissue at the treatment site from the first balloon when the cooling assembly is in the deployed state; a supply tube configured to carry liquid refrigerant distally to the chamber along at least a portion of the shaft; and an exhaust tube configured to carry gaseous refrigerant proximally from the chamber along at least a portion of the shaft, wherein the second balloon is more complaint than the first balloon.