RT Journal Article
SR Electronic
T1 Electronic auscultation of the lungs in children with asthma
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP p1140
VO 38
IS Suppl 55
A1 Elena Stezhkina
A1 Tatiana Filimonova
A1 Galina Sharowskaya
A1 Andrey Dmitriev
YR 2011
UL http://erj.ersjournals.com/content/38/Suppl_55/p1140.abstract
AB Aim: The aim of this study was to determine the quantitative characteristics of sounds by electronic auscultation in children with asthma.Materials and methods: 112 children with moderate and severe persistent asthma and 41 healthy child, the control group, aged 7-18 years were included in this study. Sound phenomens recorded on the chest with an electret microphone SAFA (Korea) twice: at admission and on the third day of treatment. Data processing was carried out using Audacity 1.3 audio editing and Adobe Audition 1.5.Results: The asthmatic children respirophonogram's curve didn't show a smooth amplitude decrease in frequencies over 300-1200 Hz, had the persistence of the peaks in the range of more than 1100 Hz, the sawtooth shape of the curve. Sound characteristics do not depend on sex, age, level of physical development of children.After treatment we noted the decrease of the respirofonogram's curve in amplitude at frequencies exceeding 500 Hz, with preservation of low-amplitude peaks in the range of high frequency (1200 Hz). Thus, the air flow becomes less turbulent and severity of bronchial obstruction is reduced. Correlations between the parameters of respiratory sounds and spirometry and peak flow not revealed.Conclusion: Quantitative characteristic respiratory sounds by the electronic auscultation allows to objectively establish the presence of obstruction in children.