THE PECULIARITIES OF ANALYSIS OF BREATHING GAS MIXTURES BASED ON HELIUM AT INCREASED PRESSURE IN THE PRESSURE CHAMBER
A comparative study of the ways of analysis of breathing gas in mixtures based on helium (directly in the pressure chamber at elevated pressure to 1.08 MPa and in gas mixture, released from the pressure chamber, at normal pressure) showed that there are differences in the results of the analysis. The difference in the partial pressures of oxygen averaging 2.4 mm Hg and does not matter much for control of oxygen in environment of the chamber. However, the discrepancy between the results of the analysis of O2 and CO2 in these environments has a scientific and methodological importance, as their use for the calculation of indicators of respiratory gas exchange in humans in the chamber leads to a significant difference of consumption values of O2 and excretion of CO2. While maintaining stable pressure, homogeneity of the gas environment, temperature and humidity in the measuring cell sensors, the optimum flow rate of the mixture at release through the valve from the pressure chamber and with the use of highly sensitive analyzers, these ways may be used for research purposes in the study of respiratory gas exchange.