PROMISING NONPHARMACOLOGICAL APPROACHES TO EMERGENCY ENHANCEMENT OF HUMAN RESISTANCE TO OVERCOOLING
https://doi.org/10.22328/2413-5747-2018-4-2-48-55
Abstract
Developing of the Arctic territories ofRussiamakes it expedient to devise safety means for emergency enhancement of professionals’ resistance to overcooling in order to reduce health risks associated with long-term dwelling under Arctic conditions. To develop and test promising means of non-pharmacological interventions suitable for enhancing the hypothermic resistance of subjects at work under cool environmental conditions, we recruited 37 able-bodied male volunteers, which were assigned to two experimental groups. In Group 1 (25 subjects), 10 sessions of cryothermic training (CTT) consisted of placing each subject in a cryochamber at –150±2° C for 2 to 5 minutes. In Group 2 (12 subjects), CTT was supplemented with 10 sessions of normobaric hypoxic preconditioning: 40 minutes of inhaling of a gas mixture containing 15% oxygen. Hypothermic resistance was assessed during the first and the tenth training procedure. The procedures were found to enhance gradually the hypothermic resistance, the outcome being more pronounced in the Group 2. The subjective tolerance to cold was roughly the same in both groups. The mean time of tolerance to hypothermia increased during the tenth vs. the first session by 40% in Group 1 vs. 49% in Group 2. Rectal temperature decrease decelerated by 19% vs. 25%, respectively. Systemic circulation responsiveness to hypothermia decreased by 23–40% vs. 28–50%, respectively. Thus, the combined hypothermic and hypoxic preconditioning is found to be an effective and safe means of non-pharmacological emergency enhancement of tolerance to hypothermia.
About the Authors
V. N. Sklyarov
Rostov State Medical University
Russian Federation
Russian Federation
Vadim N. Sklyarov
Rostov-on-Don
N. V. Kochubeynik
Rostov State Medical University
Russian Federation
Russian Federation
Nikolaj V. Kochubeynik
Rostov-on-Don
V. S. Groshilin
Rostov State Medical University
Russian Federation
Russian Federation
Vitalij S. Groshilin
Rostov-on-Don
D. V. Shatov
Rostov State Medical University
Russian Federation
Russian Federation
Dmitrij V. Shatov
Rostov-on-Don
V. A. Stepanov
Rostov State Medical University
Russian Federation
Russian Federation
Vladimir A. Stepanov
Rostov-on-Don
S. E. Bugayan
Rostov State Medical University
Russian Federation
Russian Federation
Svetlana E. Bugayan
Rostov-on-Don
S. N. Linchenko
Kuban State Medical University
Russian Federation
Russian Federation
Sergej N. Linchenko
Krasnodar
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Review
For citations:
Sklyarov V.N., Kochubeynik N.V., Groshilin V.S., Shatov D.V., Stepanov V.A., Bugayan S.E., Linchenko S.N. PROMISING NONPHARMACOLOGICAL APPROACHES TO EMERGENCY ENHANCEMENT OF HUMAN RESISTANCE TO OVERCOOLING. Marine Medicine. 2018;4(2):48-55. https://doi.org/10.22328/2413-5747-2018-4-2-48-55
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