[Osmoregulating function of the kidneys in immersion].

Tests for tolerance of water and isotonic NaCl solution (20 ml/kg) were used to study the osmotic and volume regulation during a 3-day immersion of the normal human kidneys and in recovery period, as well as to evaluate adequacy of hydro-ionic homeostasis of the body under these conditions. Mechanisms of shifts in renal functional state and in systems for regulation of water-salt exchange under altered cardiac inflow during and after immersion are discussed.