[New parameters of the oxygen transport function of arterial blood]. / O novykh parametrakh kislorodtransportnoi funktsii arterial'noi krovi.

New criteria of the arterial blood oxygen transport function suggested by O. Siggaard-Andersen et al. are reviewed. The examples from clinical practice show the possibility to evaluate the capacity of the arterial blood to transport O2 during general anesthesia and intensive care.

[Intrapulmonary venous admixture during open heart surgery]. / Vnutrilegochnoe venoznoe primeshivanie pri operatsiiakh na otkrytom serdtse.

Monitor-computer study of changes in the ventilatory parameters, hemodynamics, gas exchange has shown that assisted circulation in patients operated on for acquired heart valve defects causes in the postperfusion period a 2-fold increase in intrapulmonary venous admixture (Qs/Qt), which accompanied an increase in alveolar-arterial difference (pO2) and a fall in arterial blood pO2. An increase in Qs/Qt upon assisted circulation is associated with a decrease in ventilation/perfusion pulmonary ratio and possible deterioration of diffuse processes due to hemodilution-induced water balance disturbances. Controlled lung ventilation with positive end respiratory pressure (5-8 cm H2O) partially decreases intrapulmonary shunting and improves arterial blood oxygenation. Positive effect, i. e. improved oxygenating lung capacity and decreased intrapulmonary shunting is achieved with water balance normalization due to early administration of diuretics upon assisted circulation.