FEATURES OF PULMONARY GAS EXCHANGE EXTERNAL BREATH REACTION TO LOCAL COLD INFLUENCE IN YOUNG ABLE-BODIED PERSONS


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Abstract

Intention. Aim? The effect of local cooling of the hand and foot skin on the functioning of pulmonary gas exchange in 30 young men and 30 girls aged 18-24 has been studied. Methods. At the initial stage of the study, an analysis of exhaled air was carried out with the ergospirometry system Oxycon Pro. The next stage consisted of carrying out a cold effect on the hand skin. The examinee put down a hand for 1 minute in a vessel with water with temperature successively was 24 °С, 15 °C and 8 °C. Right after local hypothermia repeated analysis of the exhaled air composition was carried out. The recovery interval between the tests was 25-30 minutes. The analysis of exhaled air was carried out during cooling of the foot in the same sequence. Results. A statistically significant increase in the ventilation equivalent for carbon dioxide (VECO2) by 5.4 % after cooling with a temperature of 8 °С and a ventilation equivalent for oxygen (VEO2) by 7.6 %, 7.6 %, and 6.4 % with cooling at 24 °С, 15 °С and 8 °С, respectively, were observed in girls while cooling the hand skin. There were also increase in the value of the respiratory coefficient (RC) at 24 °С by 3.9 % and at 8 °С by 2.6 %. A significant increase in RC by 7.8 % was also performed in young men while the local hypothermia of the hand at the temperature of 24 °С. An increase in VEO2 by 8.8 % in girls was observed in result of local cooling of the foot at the temperature of 24 °С. Influence of temperatures of 15 °С and 8 °С led to a significant increase in the indicator of VECO2 by 4.8 % and 7.6 %, and also by 8.4 % and 8.0 %, respectively. In addition, the cold influence on the foot skin in young men caused a significant decrease in the liberation rate of carbon dioxide (LRCO2) by 18.8 % while cooling at 24 °С, and at 8 °С by 17.1%. Conclusion. The reaction of pulmonary gas exchange to local cooling in girls is more pronounced than in young men and depends on the area of cooling and the temperature of exposure. The most significant changes are observed when the foot is locally cooled by the temperature of the water, causing a slight and strong body strain.

About the authors

A A Shangina

Northern (Arctic) Federal University

SPIN-code: 2351-2459

O N Popova

Northern State Medical University

SPIN-code: 5792-0273

E V Tikhonova

Northern State Medical University

SPIN-code: 7400-0146

S V Kolmogorov

Northern (Arctic) Federal University

SPIN-code: 5885-9656

A B Gudkov

Northern (Arctic) Federal University; Northern State Medical University

SPIN-code: 4369-3372
доктор медицинских наук, профессор, директор института гигиены и экологии человека; заслуженный работник высшей школы РФ; главный научный сотрудник научно-исследовательской лаборатории функциональных резервов организма института медико-биологических исследований

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