Document Detail

Chest wall kinematics during cough in healthy subjects.
MedLine Citation:
PMID:  17394566     Owner:  NLM     Status:  MEDLINE    
AIM: The study of kinematics of the chest wall (CW) could allow us to define the relative deflationary contribution of its compartments during fits of coughing. We hypothesized that if forces applied to the lung apposed rib cage are not commensurate with those applied to the abdomen-apposed rib cage, cough could result in rib cage distortion. METHODS: In 12 (five women) healthy subjects we evaluated the volumes of CW (Vcw) and its compartments: the lung apposed rib cage, the abdomen apposed rib cage and the abdomen, by optoelectronic plethysmography. The loop of volume of the lung apposed rib cage/volume of the abdomen apposed rib cage allowed the calculation of mean rib cage distortion, resulting in a dimensionless number which, when multiplied by 100, gives percentage distortion. Each subject performed voluntary single and prolonged coughing efforts at functional residual capacity (FRC) and after maximal inspiration (max). The normal level of mean distortion was set at <0.5%. RESULTS: The three compartments contributed to reducing end-expiratory Vcw during cough at FRC and prolonged maximum cough, with the latter resulting in the greatest CW deflation. Mean rib cage distortion did not differ between men and women (P > 0.1), but tended to significantly increase from single to prolonged Cough Max (1.3% +/- 1.0 vs. 2.3% +/- 1.6, respectively; P = 0.06). CONCLUSION: Rib cage distortion may ensue during coughing, probably as a result of uneven distribution of forces applied to the rib cage.
B Lanini; R Bianchi; B Binazzi; I Romagnoli; F Pala; F Gigliotti; G Scano
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Publication Detail:
Type:  Clinical Trial; Journal Article     Date:  2007-03-30
Journal Detail:
Title:  Acta physiologica (Oxford, England)     Volume:  190     ISSN:  1748-1708     ISO Abbreviation:  Acta Physiol (Oxf)     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-07-19     Completed Date:  2007-12-06     Revised Date:  2009-02-03    
Medline Journal Info:
Nlm Unique ID:  101262545     Medline TA:  Acta Physiol (Oxf)     Country:  England    
Other Details:
Languages:  eng     Pagination:  351-8     Citation Subset:  IM    
Section of Respiratory Rehabilitation, Fondazione Don C. Gnocchi ONLUS (IRCCS), Pozzolatico, Firenze, Italy.
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MeSH Terms
Cough / pathology,  physiopathology*
Respiratory Mechanics / physiology
Ribs / pathology,  physiopathology*
Thoracic Wall / pathology,  physiology*

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