Panteleeva N.I., Fokin A.A., Roshchevskaya I.M.
THE FUNCTION OF EXTERNAL BREATH OF RESIDENTS OF EUROPEAN NORTH UNDER ACUTE INFLUENCE OF HYPOXIC AND HYPEROXIC GAS MIXES ^{[№ 9 ' 2016]}
The oxygen-transport function of respiratory and cardiovascular systems of a human being defines intensity of oxidation-reduction and thermoregulatory reactions of an organism, therefore the normal functioning of respiratory system is especially significant for residence in a cold climate. The geo-climatic peculiarity of Northern territories of Russia is characterized by sudden changes of air temperatures, high variability of meteofactors, and hypoxia. This complex of factors leads to a significant tension of respiratory system contributing to the development of pulmonary pathologies. Studying the external breath in residents of the North at provocation of contrast respiratory modes is an important problem of ecological physiology. The reaction of respiratory system to impact of hypoxia and hyperoxia in the young men living in the territory of the European North has been researched. Hypoxic influence was carried out at the 15-minute breathing of air with oxygen content of 11.0–12.3 %, hyperoxic influence was carried out at the 60-minute exposition by air with oxygen content of 75–85 %. Thus, the features of functioning of northerners' cardiorespiratory system formed by long-term adaptation to living in a cold climate were shown in different from normal parameters of flow velocity and volumetric flow rate characteristics of function of external breath, and they were reflected in insignificant reactivity of ventilation function during short-term influence of contrast oxygen modes. The compensatory reactions of external breath system during impact of the changed gas mixture occurred not at the expense of pulmonary amounts, but were directed to the change of bronchial resistance.