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A micro-heat-pipe catheter provides a hyperthermia or hypothermia source for the treatment of cancerous tumors or other diseased tissue. The heat-pipe is about the size of a hypodermic needle and is thermally insulated along a substantial portion of its length. The heat-pipe includes a channel, partially charged with an appropriate working fluid. Active or passive heat control tailors the delivery or removal of thermal energy directly to or from the tumor or diseased tissue site.
Fletcher, Leroy S.; Peterson, George P. (1993). Micro-heat-pipe catheter. United States. Patent and Trademark Office; Texas A&M University. Libraries. Available electronically from