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[Respiratory distress in newborns born to hypertensive mothers and acid-base equilibrium and the ion composition of the amniotic fluid].

Twenty-five samples of amniotic fluid obtained by amniocentesis from 25 pregnant women with hypertension in the 35 to 40 weeks of pregnancy were studied. The following biochemical determinations were done in the samples: acid-base equilibrium (pH, pO2, pCO2, base deficit, standard HCO3- and total CO2), concentrations of potassium and sodium ions, total and ionised calcium and inorganic phosphorus. The results were analysed depending on the presence of the respiratory distress syndrome in the newborn, and were subjected to statistical analysis. It was found that determination of acid-base equilibrium and concentrations of K+, Na+, total and ionised Ca++ and inorganic phosphorus in the amniotic fluid of hypertensive women are probably without prognostic significance with respect to the development of the respiratory distress syndrome in newborns.