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  • Title: [Activation of external respiration and level of alveolar PCO2 in pilots in flight].
    Author: Genin AM, Poliakov VN, Asiamolova NM, Stepanov VK, Iakovlenko VS.
    Journal: Kosm Biol Aviakosm Med; 1975; 9(2):59-65. PubMed ID: 1123904.
    Abstract:
    The paper discusses the emergence of spontaneous hypocapnia in real aircraft flights. The flying personnel were taken under study. The hypocapnic state was diagnosed on the basis of the CO2 concentration in the alveolar air measured by a special device. In flight the CO2 concentration in the alveolar air decreased insignificantly (by 5 min Hg on the average). In emergency situations the external respiration was activated to a greater extent. It is suggested that the alveolar Pco2 level is indicative of the emotional stress.
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