[Dynamics of the heat exchange in rats upon getting out of the state of artificial hypothermia].

With the help of thermometry and general calorimetry, changes in the heat exchange were determined in the non-hibernating mammals (rats) upon their getting out of artificial deep hypothermia (the temperature in the rectum was 22-24 degrees C) at the temperature in the calorimeter chamber 22 degrees C. An attempt was made to find out what part of the heal production during animal self-warming is used for increasing its body temperature and what part of the heat production is released to the environment by the animal. The experiments revealed a complex relationship between the body temperature, the heat loss, and the total heat production during the animal self-warming. The result was that the total heat production first increased and, after reaching the maximum, decreased gradually. The experiments showed that during two and more hours of observation the body temperature did not reach the starting level, the same was true for the total heat production, which was the sum of the heat loss and the heat production spent for warming the animal body.