Patent ID: 7785289
Filing Date: 2010-08-31
Classification: A61B,A61M

Abstract:
1. A cryotherapy catheter comprising: a cryotherapy distal end portion having an inner chamber and an outer surface to contact body tissue to provide cryotherapy; and an elongate member having lumens formed therein that provide cryotherapy fluid from a proximal end of the elongate member to the distal end portion inner chamber and channel exhaust proximally from the distal end portion inner chamber, the elongate member comprising an outer generally tubular structure comprising, firstly, an inner tube structure of rigid material having a circumferential cut through at least a portion of a longitudinal length of the inner tube structure to allow bending of the circumferentially-cut portion of the inner tube structure while substantially maintaining a uniform cross-sectional area and shape at a point of bending, and secondly, a separate outer tube that surrounds and is spaced apart from at least the circumferentially-cut portion of the inner tube structure, the separate outer tube being attached in a sealed manner to a proximal end of the cryotherapy distal end portion.