抄録
Japan marine science and technology center conducted twenty-four saturation dives including the project SEATOPIA (max 100m), the project SEADRAGON (max 300m simulation dive) and et.al. in the period from 1972 to 1984. In those projects, the studies about diver's water balance and body heat loss were carried out. This paper discussed about the urine flow and the insensible water loss on the divers staying under helium rich hyperbaric environment. The results obtained are as follows. 1. Urine flow is increased in proportion to the environmental pressure. This phenomenon is clear with the night urination. 2. Insensible water loss at 31 ATA is decreased to 1/2 of the value at 1 ATA. 3. The decrease of insensible water loss contains 44% within the night urination's increase in the case of 31 ATA, the remains case consists the high moisture inside the blanket and the cold stress by helium gas.
