| Base lung sound in diffuse interstitial pneumonia analyzed by linear and nonlinear techniques. | |
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MedLine Citation:
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PMID: 19162985 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Abnormal lung sounds in diffuse interstitial pneumonia have been characterized by the presence of crackles. However, few attempts have tried to analyze the sound where crackles are immersed. In this work base lung sounds (BLS) were analyzed by linear and nonlinear techniques to find possible differences between normal subjects and patients with diffuse interstitial pneumonia. In both groups, segments of lung sounds (crackles absent) and segments of BLS (lung sound in between crackles) were analyzed from acquired lung sounds from four points at the posterior chest, two apical and two basal. In this study, 8 healthy subjects and 8 patients participated and BLS were analyzed by spectral percentiles and sample entropy. Although spectral percentiles and sample entropy (SampEn) tended to be lower in the group of patients, statistical differences (p0.05) between normal subjects and patients were found in BLS at the left hemithorax at basal and apical regions, while at the right hemithorax significant differences were found only at the basal region using the nonlinear technique. We conclude that in respect to normal subjects, BLS of patients with diffuse interstitial pneumonia present differences as assessed by SampEn, so that BLS by itself provides useful information. Moreover, it seems that nonlinear technique did a better discrimination of abnormal BLS than spectral percentile parameters. |
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Authors:
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L Albuerne-Sánchez; S Charleston-Villalobos; R González-Camarena; G Chi-Lem; J G Carrillo; T Aljama-Corrales |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference Volume: 2008 ISSN: 1557-170X ISO Abbreviation: Conf Proc IEEE Eng Med Biol Soc Publication Date: 2008 |
Date Detail:
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Created Date: 2009-02-16 Completed Date: 2009-05-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101243413 Medline TA: Conf Proc IEEE Eng Med Biol Soc Country: United States |
Other Details:
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Languages: eng Pagination: 1615-8 Citation Subset: IM |
Affiliation:
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Biomedical Engineering Program, Universidad Autónoma Metropolitana, Mexico City 09340, Mexico. li_alsa@yahoo.com.mx |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Biomedical Engineering Case-Control Studies Female Humans Linear Models Lung Diseases, Interstitial / physiopathology* Middle Aged Models, Biological Nonlinear Dynamics Respiratory Sounds / physiology* Signal Processing, Computer-Assisted |
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