[The effect of various electrolyte solutions on the water and electrolyte balance during the postoperative phase].

Investigations with 3 electrolyte solutions having different qualitative and quantitative compositions were carried out to see their effect on the physiological equilibrium in the pre, intra- and postoperative phases in patients who had to undergo moderately severe surgery. On the basis of electrolyte and osmolarity determinations in serum and 24-hour urine, blood gas analyses, determinations of hemoglobin and hematocrit, 24-hour volume and specific weight of the urine, it was possible to establish an electrolyte administration adapted to the pre-, intra- and postoperative condition of the patients. By the infusion of a solution with this electrolyte content it was possible to keep the measured parameters within the normal range throughout the entire period of measurement before, during and after the operation.