Influence of smoking on the functional status of the respiratory sistem

About the authors:

Lyudmila I. Katashinskaya, Cand. Sci. (Biol.), Associate Professor at the Department of Biology, Geography and their Teaching Methods, Ishim State Pedagogical Institute named after P. Yershov (Tyumen State University Branch); Katashinskaya@yandex.ru

Larisa V. Gubanova, Senior Lecturer, Department of Ecology and Geography, Ishim State Pedagogical Institute

Abstract:

The aim of the research is to study the influence of smoking on the functional status of the respiratory system. By means of the method of spirography the basic functional data for smokers and non-smokers were defined as well as the level of blood oxygen saturation (oxygenation level). To study the connection between smoking, the level of oxygen saturation and breathing rate of smokers and non-smokers we took tests in the state of complete relaxation and after physical exercise. Parameters of vital capacity and respiratory volume in the groups of smokers and non-smokers do not differ significantly. The functional status of the respiratory system of smoking men and women is characterized by low levels of the forced expiratory volume 1 and the Tiffno`s index (FEV1/FVC ratio (FEV1%)), which means that these groups may have bronchial obstruction and obstructive changes in respiratory tracts. After physical exercises the level of blood oxygenation in smokers was significantly lower which indicates violation of gaseous metabolism in the smoker`s organism. The breathing rate of smokers and non-smokers after exercising was significantly different from the values obtained in the state of complete relaxation. Smokers demonstrated a higher breathing rate than non-smokers, notwithstanding the sex difference. The high breathing rate of smokers after exercising indicates violation of lung ventilation.

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