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Acoustic estimation of the impact of a single dive using a closed-type breathing apparatus on the ventilatory function of the human lungs

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Abstract

Diving negatively affects the human respiratory system, especially if an oxygen breathing apparatus is used. The spirometry indices generally used to estimate the ventilatory function of the lung have a poor sensitivity to the toxic effect of hyperbaric hyperoxia. The goal of this study was to estimate the possibilities of using the forced expiratory (FE) tracheal noise duration. The study was done on 48 divers who had been tested before and after a single dive.

A significant decrease in the spirography volumes but within normal limits was seen totally in the group. In analyzing individual responses, a significant increase in the FE tracheal noise duration above the normal range (19.6%, p < 0.05) was found in ten subjects (20.8%). Respiratory symptoms that were typical of the initial manifestations of pulmonary oxygen intoxication were found in three cases in these subjects. In the remaining seven subjects, the asymptomatic increase in the FE tracheal noise duration was classified as a sign of the latent preclinical phase of the hyperbaric hyperoxia effect.

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Authors and Affiliations

  1. Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia

    I. A. Pochekutova & V. I. Korenbaum

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  1. I. A. Pochekutova
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  2. V. I. Korenbaum
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Original Russian Text © I.A. Pochekutova, V.I. Korenbaum, 2011, published in Fiziologiya Cheloveka, 2011, Vol. 37, No. 3, pp. 76–82.

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Pochekutova, I.A., Korenbaum, V.I. Acoustic estimation of the impact of a single dive using a closed-type breathing apparatus on the ventilatory function of the human lungs. Hum Physiol 37, 334–338 (2011). https://doi.org/10.1134/S0362119711020162

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