Patent ID: 9060755
Filing Date: 2015-06-23
Classification: A61B

Abstract:
1. A method for treating a patient, comprising: locating a cryotherapeutic applicator intravascularly at a treatment site within or otherwise proximate a renal artery, wherein the applicator includes a balloon at a distal portion of an elongated shaft; transporting liquid refrigerant distally through a supply tube extending along a length of the shaft; expanding the refrigerant through orifices longitudinally spaced apart along a portion of the supply tube within the balloon; and exhausting gaseous refrigerant proximally through an exhaust passage within the balloon, wherein the portion of the supply tube within the balloon is helically wound around the exhaust passage such that expanding the refrigerant through the orifices directs the refrigerant toward a helical region of the balloon and thereby cools an adjacent helical region of tissue at the treatment site.