Patent ID: 8007525
Filing Date: 2011-08-30
Classification: A61B,A61F,A61M

Abstract:
1. A method for altering the body temperature of a living patient having blood circulating through his or her vasculature, said method comprising the steps of: A. providing a heat exchange catheter which is insertable into the lumen of a blood vessel of the patient, said heat exchange catheter having a distal end, a heat exchange region which occupies less than the entire length of the catheter body and has a heat exchange surface which comprises a helical protrusion, an inflow lumen through which a circulating heat exchange fluid flows into the heat exchange region an outflow lumen through which the circulating heat exchange fluid flows out of the heat exchange region; B. inserting the heat exchange catheter, distal end first, into the patient's vasculature; C. advancing the catheter to a position where the heat exchange region is is positioned within a blood vessel and the distal end of the catheter remains within the patient's vasculature; D. circulating heat exchange fluid through the heat exchange region, causing heat to be exchanged, through the heat exchange surface, between the circulating heat exchange fluid and blood flowing through the blood vessel; and E. adjusting the temperature of the circulating heat exchange fluid to cause the patient's body temperature to be maintained at or changed to a desired body temperature.