The present invention discloses a nitrogen gas pre-cooling throttle tumor ultra-low temperature therapeutic system. Said invention adopts a compression-type refrigerator to pre-cool nitrogen gas. Said system can make normal-temperature high-pressure nitrogen gas be divided into two branches, one branch is passed through an electromagnetic valve, and fed into sleeve-type evaporator of the refrigerator and pre-cooled, then inputted into frozen probe and further throttled and cooled; another branch is passed through another electromagnetic valve, and fed into a heating heat-exchanger and healed, then inputted into frozen probe to heat the therapeutic region. Said invention can be extensively used in the urological department, tumor department, department of dermatology, department of gynecology, chest surgery and others. |