US Patent 6899726 Expandable device for thermal therapy including spiral element

A method and expandable device for thermally affecting tissue in which there is a fluid conduit. The fluid conduit defining a spiral-shaped element. The fluid conduit includes a wall defining an inner volume. The inner volume being configured to pass thermally transmissive fluid. Optionally, the tissue contact region is operable to have a first contact surface area and a second contact surface area in which the second contact surface area is larger than the first contact surface area. A method of use of the device is provided.