Patent ID: 8764740
Filing Date: 2014-07-01
Classification: A61B

Abstract:
1. An apparatus for dispersing a coolant within a cryo-ablation device positionable within a patient, comprising: a tubular member configured for insertion within a body of the cryo-ablation device, the tubular member comprising a plurality of coaxial tubes having different diameters and extending to different lengths within the cryo-ablation device body, the plurality of coaxial tubes defining a respective plurality of annular spaces such that coolant can flow through the plurality of annular spaces and be released from only a distal terminus of a distal portion of each of the plurality of tubes at different axial locations along the tubular member, the plurality of coaxial tubes comprising at least an outer tube and an inner tube disposed at least partially within the outer tube, the inner tube defining a central lumen through which coolant is released, wherein a distal end of the inner tube extends distally beyond a distal end of the outer tube.