Document Detail


Compartmental analysis of breathing in the supine and prone positions by optoelectronic plethysmography.
MedLine Citation:
PMID:  11219508     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Optoelectronic plethysmography (OEP) has been shown to be a reliable method for the analysis of chest wall kinematics partitioned into pulmonary rib cage, abdominal rib cage, abdomen, and right and left side in the seated and erect positions. In this paper, we extended the applicability of this method to the supine and prone positions, typically adopted in critically ill patients. For this purpose we have first developed proper geometrical and mathematical models of the chest wall which are able to provide consistent and reliable estimations of total and compartmental volume variations in these positions suitable for clinical settings. Then we compared chest wall (CW) volume changes computed from OEP(deltaVCW) with lung volume changes measured with a water seal spirometer (SP) (deltaVSP) in 10 normal subjects during quiet (QB) and deep (DB) breathing on rigid and soft supports. We found that on a rigid support the average differences between deltaVSP and deltaVCW were -4.2% +/- 6.2%, -3.0% +/- 6.1%, -1.7% +/- 7.0%, and -4.5% +/- 9.8%, respectively, during supine/QB, supine/DB, prone/QB, and prone/DB. On the soft surface we obtained -0.1% +/- 6.0%, -1.8% +/- 7.8%, 18.0% +/- 11.7%, and 10.2% +/- 9.6%, respectively. On rigid support and QB, the abdominal compartment contributed most of the deltaVCW in the supine (63.1% +/- 11.4%) and prone (53.5% +/- 13.1%) positions. deltaVCW was equally distributed between right and left sides. In the prone position we found a different chest wall volume distribution between pulmonary and abdominal rib cage (22.1% +/- 8.6% and 24.4% +/- 6.8%, respectively) compared with the supine position (23.3% +/- 9.3% and 13.6% +/- 13.0%).
Authors:
A Aliverti; R Dellacà; P Pelosi; D Chiumello; L Gatihnoni; A Pedoti
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Annals of biomedical engineering     Volume:  29     ISSN:  0090-6964     ISO Abbreviation:  Ann Biomed Eng     Publication Date:  2001 Jan 
Date Detail:
Created Date:  2001-02-21     Completed Date:  2001-04-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0361512     Medline TA:  Ann Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  60-70     Citation Subset:  IM    
Affiliation:
Dipartimento di Bioingegneria, Politecnico di Milano, Italy. aliverti@mail.cbi.polimi.it
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MeSH Terms
Descriptor/Qualifier:
Abdomen / physiology
Adult
Biomechanics
Feasibility Studies
Female
Humans
Lung Volume Measurements / methods
Male
Models, Biological
Plethysmography / methods*
Prone Position / physiology*
Reference Values
Respiratory Mechanics / physiology*
Spirometry
Supine Position / physiology*
Thorax / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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