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A New Modality Using Breath Sound Analysis to Evaluate the Control Level of Asthma
[ABSTRACT] Background: Reliable symptom assessment is essential in asthma management. We developed new technology for analyzing breath sounds and assessed its clinical usefulness for monitoring asthmatic children. Methods: Eighty asthmatic children and 59 non-asthmatic children underwent breath soun...
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Published in: | Allergology International 2013, Vol.62 (1), p.29-35 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | [ABSTRACT] Background: Reliable symptom assessment is essential in asthma management. We developed new technology for analyzing breath sounds and assessed its clinical usefulness for monitoring asthmatic children. Methods: Eighty asthmatic children and 59 non-asthmatic children underwent breath sound analysis in an asymptomatic state. Their asthma control was assessed by the Asthma Control Test(TM) or Childhood ACT(TM) scores and divided into two groups, namely, well-controlled (perfect) (n=19) and not well-controlled (not perfect) (n=61). Breath sounds were recorded using two sensors, located on the right anterior chest and trachea. We calculated the acoustic transfer characteristics between the two points, which indicated the relationship between frequencies and attenuation during breath sound propagation. Two indices of sound parameters, the chest wall sound index (CWI) and the tracheal sound index (TRI), were calculated from the transfer characteristics and tracheal sounds. We also developed a new parameter, the breath sound index (BSI), on a 2-dimensional diagram of CWI and TRI and tried to determine whether BSI may clarify asthma control better than CWI or TRI alone. Results: There was a significant difference in TRI and BSI between asthmatic and non-asthmatic children (p=0.007, p |
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ISSN: | 1323-8930 1440-1592 |
DOI: | 10.2332/allergolint.12-OA-0428 |