Assessment of military personnel tolerance to hypoxia on the background of hypobaria and high physical activity
V. N. Bykov , O. V. Vetryakov , V. N. Tsygan , Yu. S. Khalimov , А. G. Anokhin , I. V. Fateev , M. V. Kaltygin , O. A. Tolstoy
Bulletin of the Russian Military Medical Academy ›› 2017, Vol. 19 ›› Issue (3) : 129 -133.
Assessment of military personnel tolerance to hypoxia on the background of hypobaria and high physical activity
The tolerance of military personnel of motor-volitional type of activity to altitude hypoxia was assessed. With this aim, the research results concerning influence of physical activity on a range of physiological and psychophysiological factors of 40 volunteers in the course of pressure chamber research, modelling 5000 m ascent, were analyzed. It was determined that the change in levels of hemoglobin saturation in blood should be taken as the main criterion for division of the volunteers according to the tolerance to artificial hypobaria and hypoxia. Significant decrease of oxyhemoglobin in blood was registered from the first minute of being at the altitude of 5000 m. On the basis of developed technology four types of organism reactions on physical activity under the influence of artificial hypobaric hypoxia were defined. At high level of resistance to altitude hypoxia blood saturation in the majority of time periods under analysis is preserved at the level higher than 75%, mean stability is achieved when oxyhemoglobin concertation is in the range of 65–75%, while low stability is characterized by decrease of this factor up to 65%. Also, according to our opinion, the fourth type of reaction should be defined – unstable one that is characterized by rapid decrease of arterial blood ventilation during the first 10 min of ascent lower than 60% and development of clinical signs which are typical for an acute oxygen deficit. The application of suggested method of assessment of human tolerance to hypobaric hypoxia in pressure chamber conditions on the background of physical activity allows to prognosticate the development of similar reactions in military personnel when they perform physical activities in analogous hypoxia conditions, including highlands.
hypoxia / hypobaria / pressure chamber / highland / professional health / medical provision / functional state / tolerance
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