[Blood lactate dehydrogenase activity in newborn children].

Arterial and venous blood samples from babies' umbilical cord vessels before lung breath beginning were used to measure arterial-venous difference between lactate dehydrogenase activity, pH and oxygen blood saturation (sO2). Enzyme activity was 735.4 +/- 90.8 U/L in venous blood and 672.0 +/- 108.1 U/L in arterial one, pH 7.21 +/- 0.06 and 7.32 +/- 0.06, sO2 32.9 +/- 12.7 and 56.5 +/- 18.3%, respectively. Reverse correlation between enzyme activity, pH and sO2 was found.

[Results of intralaboratory quality control in the study of acid-base balance and water-electrolyte balance].

Diagnosis of emergences is one of the important objectives of laboratory studies. The present views of critical states and of the modes of their correction make requirements for the quality of conducted studies and that of the apparatuses used in these studies. The present study was undertaken to determine the intra- and interseries reproducibility of the quality of measurement on a Rapidlab 800 gas analyzer (Bayer). The study has indicated that intra- and interseries quality control on the Rapidlab 800 gas analyzer (Bayer) complies with the requirements for the analytical devices used to study acid-base and water-electrolyte balances.