[At prophylaxis of disturbance of the electrolyte- and water metabolism age (author's transl)].

The involutive restriction of the renal and pulmonary function and of the thirst and the reduction of body water also diminished the range of efficacy and possibility for adaptation of the water- and electrolyte metabolism of old people. Under geriatric aspects many causes for the endangering of the water- and electrolyte metabolism are discussed. It is founded that in old patients the quicker metabolism imbalance means a stronger threat of life that the disease itself. Often the consideration of this problem in much cases of diseases can save the life of the old patient.