The Relationship Between Airflow and Lung Sound Amplitude in Normal Subjects
Few investigators have examined the relationship between airflow and lung sound amplitude; the available data are contradictory. I measured airflow at the mouth and compared the peak flow ( V˙max) to mean and peak lung sound amplitude (mean AMP and peak AMP) at four sites on the chest wall (right an...
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| Veröffentlicht in: | Chest 1984-08, Vol.86 (2), p.225-229 |
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| description | Few investigators have examined the relationship between airflow and lung sound amplitude; the available data are contradictory. I measured airflow at the mouth and compared the peak flow ( V˙max) to mean and peak lung sound amplitude (mean AMP and peak AMP) at four sites on the chest wall (right and left anterior apices and posterior bases) in four healthy young adults. At each site, the sounds produced by 20 breaths at V˙max ranging between 1.5 and 4 L/s ( V˙var) were measured by an automated technique. Ten breaths during nearly constant V˙max breathing ( V˙con) also were measured at each site. The lung sound amplitudes at the four sites in each subject were grouped and compared to V˙max by linear regression analysis. The same sounds were also submitted to an automated V˙-correction procedure to evaluate its adequacy in automatically adjusting for the effect of variations in V˙max on lung sound amplitude. The data showed that lung sound amplitude (mean or peak) was linearly related to V˙ in all subjects (r for mean AMP vs V˙max:0.77, 0.85, 0.69,0.89; r for peak AMP vs V˙max:0.80, 0.83, 0.79, 0.88), p |
| doi_str_mv | 10.1378/chest.86.2.225 |
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I measured airflow at the mouth and compared the peak flow ( V˙max) to mean and peak lung sound amplitude (mean AMP and peak AMP) at four sites on the chest wall (right and left anterior apices and posterior bases) in four healthy young adults. At each site, the sounds produced by 20 breaths at V˙max ranging between 1.5 and 4 L/s ( V˙var) were measured by an automated technique. Ten breaths during nearly constant V˙max breathing ( V˙con) also were measured at each site. The lung sound amplitudes at the four sites in each subject were grouped and compared to V˙max by linear regression analysis. The same sounds were also submitted to an automated V˙-correction procedure to evaluate its adequacy in automatically adjusting for the effect of variations in V˙max on lung sound amplitude. The data showed that lung sound amplitude (mean or peak) was linearly related to V˙ in all subjects (r for mean AMP vs V˙max:0.77, 0.85, 0.69,0.89; r for peak AMP vs V˙max:0.80, 0.83, 0.79, 0.88), p<1×10-7 in all cases. The average mean AMP vs V˙max regression line slope was 0.42, and the average peak AMP vs V˙max regression line slope was 0.45. V˙-correction decreased the coefficient of variation of the V˙var sounds by 61 percent and flattened the average regression line slopes to 0.128. For the V˙con series, V˙-correction diminished the coefficient of variation from 12.2 to 10.0 percent. The relationship between lung sound amplitude and airflow appears to be substantially linear and this relationship can be used to adjust effectively for variations in airflow.</description><identifier>ISSN: 0012-3692</identifier><identifier>EISSN: 1931-3543</identifier><identifier>DOI: 10.1378/chest.86.2.225</identifier><identifier>PMID: 6744962</identifier><identifier>CODEN: CHETBF</identifier><language>eng</language><publisher>Northbrook, IL: Elsevier Inc</publisher><subject>Adult ; Air breathing ; Auscultation ; Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; Humans ; Lung - physiology ; Male ; Pulmonary Ventilation ; Reference Values ; Respiratory Sounds - diagnosis ; Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics ; Vertebrates: respiratory system</subject><ispartof>Chest, 1984-08, Vol.86 (2), p.225-229</ispartof><rights>1984 The American College of Chest Physicians</rights><rights>1985 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-4524bf8a2e6b71c47f9e5bc3e0544b3fedbef7f77a5944de6152f56d6bd92d8f3</citedby><cites>FETCH-LOGICAL-c388t-4524bf8a2e6b71c47f9e5bc3e0544b3fedbef7f77a5944de6152f56d6bd92d8f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27922,27923</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=8859106$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/6744962$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kraman, S.S.</creatorcontrib><title>The Relationship Between Airflow and Lung Sound Amplitude in Normal Subjects</title><title>Chest</title><addtitle>Chest</addtitle><description>Few investigators have examined the relationship between airflow and lung sound amplitude; the available data are contradictory. I measured airflow at the mouth and compared the peak flow ( V˙max) to mean and peak lung sound amplitude (mean AMP and peak AMP) at four sites on the chest wall (right and left anterior apices and posterior bases) in four healthy young adults. At each site, the sounds produced by 20 breaths at V˙max ranging between 1.5 and 4 L/s ( V˙var) were measured by an automated technique. Ten breaths during nearly constant V˙max breathing ( V˙con) also were measured at each site. The lung sound amplitudes at the four sites in each subject were grouped and compared to V˙max by linear regression analysis. The same sounds were also submitted to an automated V˙-correction procedure to evaluate its adequacy in automatically adjusting for the effect of variations in V˙max on lung sound amplitude. The data showed that lung sound amplitude (mean or peak) was linearly related to V˙ in all subjects (r for mean AMP vs V˙max:0.77, 0.85, 0.69,0.89; r for peak AMP vs V˙max:0.80, 0.83, 0.79, 0.88), p<1×10-7 in all cases. The average mean AMP vs V˙max regression line slope was 0.42, and the average peak AMP vs V˙max regression line slope was 0.45. V˙-correction decreased the coefficient of variation of the V˙var sounds by 61 percent and flattened the average regression line slopes to 0.128. For the V˙con series, V˙-correction diminished the coefficient of variation from 12.2 to 10.0 percent. The relationship between lung sound amplitude and airflow appears to be substantially linear and this relationship can be used to adjust effectively for variations in airflow.</description><subject>Adult</subject><subject>Air breathing</subject><subject>Auscultation</subject><subject>Biological and medical sciences</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Lung - physiology</subject><subject>Male</subject><subject>Pulmonary Ventilation</subject><subject>Reference Values</subject><subject>Respiratory Sounds - diagnosis</subject><subject>Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics</subject><subject>Vertebrates: respiratory system</subject><issn>0012-3692</issn><issn>1931-3543</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kEtv1DAURi0EKtPClh1SFohdQvyMsxyq8pBGINGythz7uvHIiQc76Yh_j2FGhQ0r27rf4_og9Aq3DaadfGdGyEsjRUMaQvgTtME9xTXljD5Fm7bFpKaiJ8_RZc77trxxLy7QhegY6wXZoN3dCNU3CHrxcc6jP1TvYTkCzNXWJxfisdKzrXbrfF_dxrVct9Mh-GW1UPm5-hLTpEN1uw57MEt-gZ45HTK8PJ9X6PuHm7vrT_Xu68fP19tdbaiUS804YYOTmoAYOmxY53rgg6HQcsYG6sAO4DrXdZr3jFkQmBPHhRWD7YmVjl6ht6fcQ4o_1vJ_NflsIAQ9Q1yzkhiLjjBehM1JaFLMOYFTh-QnnX4q3Krf-NQffEoKRVTBVwyvz8nrMIF9lJ95lfmb81xno4NLejY-P8qk5D1uxd_e0d-PR59A5cIplFB6atzHNc06_NMrTwYo2B48JJWNh9mALWazKBv9_1b-BVShnXw</recordid><startdate>198408</startdate><enddate>198408</enddate><creator>Kraman, S.S.</creator><general>Elsevier Inc</general><general>American College of Chest Physicians</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>198408</creationdate><title>The Relationship Between Airflow and Lung Sound Amplitude in Normal Subjects</title><author>Kraman, S.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c388t-4524bf8a2e6b71c47f9e5bc3e0544b3fedbef7f77a5944de6152f56d6bd92d8f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><topic>Adult</topic><topic>Air breathing</topic><topic>Auscultation</topic><topic>Biological and medical sciences</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Lung - physiology</topic><topic>Male</topic><topic>Pulmonary Ventilation</topic><topic>Reference Values</topic><topic>Respiratory Sounds - diagnosis</topic><topic>Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics</topic><topic>Vertebrates: respiratory system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kraman, S.S.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Chest</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kraman, S.S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Relationship Between Airflow and Lung Sound Amplitude in Normal Subjects</atitle><jtitle>Chest</jtitle><addtitle>Chest</addtitle><date>1984-08</date><risdate>1984</risdate><volume>86</volume><issue>2</issue><spage>225</spage><epage>229</epage><pages>225-229</pages><issn>0012-3692</issn><eissn>1931-3543</eissn><coden>CHETBF</coden><abstract>Few investigators have examined the relationship between airflow and lung sound amplitude; the available data are contradictory. I measured airflow at the mouth and compared the peak flow ( V˙max) to mean and peak lung sound amplitude (mean AMP and peak AMP) at four sites on the chest wall (right and left anterior apices and posterior bases) in four healthy young adults. At each site, the sounds produced by 20 breaths at V˙max ranging between 1.5 and 4 L/s ( V˙var) were measured by an automated technique. Ten breaths during nearly constant V˙max breathing ( V˙con) also were measured at each site. The lung sound amplitudes at the four sites in each subject were grouped and compared to V˙max by linear regression analysis. The same sounds were also submitted to an automated V˙-correction procedure to evaluate its adequacy in automatically adjusting for the effect of variations in V˙max on lung sound amplitude. The data showed that lung sound amplitude (mean or peak) was linearly related to V˙ in all subjects (r for mean AMP vs V˙max:0.77, 0.85, 0.69,0.89; r for peak AMP vs V˙max:0.80, 0.83, 0.79, 0.88), p<1×10-7 in all cases. The average mean AMP vs V˙max regression line slope was 0.42, and the average peak AMP vs V˙max regression line slope was 0.45. V˙-correction decreased the coefficient of variation of the V˙var sounds by 61 percent and flattened the average regression line slopes to 0.128. For the V˙con series, V˙-correction diminished the coefficient of variation from 12.2 to 10.0 percent. The relationship between lung sound amplitude and airflow appears to be substantially linear and this relationship can be used to adjust effectively for variations in airflow.</abstract><cop>Northbrook, IL</cop><pub>Elsevier Inc</pub><pmid>6744962</pmid><doi>10.1378/chest.86.2.225</doi><tpages>5</tpages></addata></record> |
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| subjects | Adult Air breathing Auscultation Biological and medical sciences Fundamental and applied biological sciences. Psychology Humans Lung - physiology Male Pulmonary Ventilation Reference Values Respiratory Sounds - diagnosis Respiratory system: anatomy, metabolism, gas exchange, ventilatory mechanics, respiratory hemodynamics Vertebrates: respiratory system |
| title | The Relationship Between Airflow and Lung Sound Amplitude in Normal Subjects |
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