• Nihon Kyobu Geka Gakkai Zasshi · Dec 1989

    [New classification and analysis of lung sounds].

    • K Kikuchi, M Watanabe, T Hashizume, M Kawamura, R Kato, K Kobayashi, and T Ishihara.
    • Nihon Kyobu Geka Gakkai Zasshi. 1989 Dec 1;37(12):2532-7.

    AbstractRecently, classification and nomenclature of lung sounds has been changed from assessment based on subjective interpretation to assessment based on objective, measureable criteria related to mechanisms of sound generation. The adventitious sounds was classified to four kinds of principal terms, continuous adventitious sounds (wheezes, rhonchi) and discontinuous adventitious sounds (coarse crackles, fine crackle) at the 1985 International Symposium on Lung Auscultation. Lung sounds in the surgical patients were digitized for the analysis of both the time domain and the frequency domain which had been recorded by tape recorder. Rhonchi, fine crackle and tracheal stenotic sounds were characterized by the analysis of the frequency domain. Lung sound analysis is promising because it is safe, non invasive and may be used for clinical studies in the surgical patients.

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