Abstract
Spectral and time characteristics of forced expiratory sound, recorded in the trachea, were analyzed in 96 subjects. Sick and healthy subjects and the risk group demonstrated substantial differences in the acoustic parameters (total sound duration, “vortex stoppage” duration, and emergence of spectral components with high frequency and narrow band at the end of an expiration). The authors suggest and substantiate acoustic criteria of the bronchial patency disorder, assuming on this basis that such disorders are more common in patients with chronic nonobstructive bronchitis (70.8%) and subjects at risk for chronic obstructive pulmonary diseases (45.4%) than is demonstrated by conventional functional methods.
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Pochekutova, I.A., Korenbaum, V.I., Kulakov, Y.V. et al. Significance of Spectral and Time Parameters of Forced Expiratory Sound in Evaluating Bronchial Patency. Human Physiology 27, 441–444 (2001). https://doi.org/10.1023/A:1010910719165
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DOI: https://doi.org/10.1023/A:1010910719165