Document Detail

A sampling method for mean alveolar gas in normal subjects and patients with respiratory disease.
MedLine Citation:
PMID:  1016797     Owner:  NLM     Status:  MEDLINE    
The paper describes an alveolar gas sampling method based on the criterion of equality of mean alveolar (RA) and expired (RE) respiratory quotients. Expired gas is sampled at an expired volume equal to VT/2 + VD by means of a mechanical sampler controlled by an analog computer. Eleven normal subjects and 50 patients with cardiopulmonary disease have been tested. When the difference between mean alveolar and expired respiratory quotients did not exceed 0.05, the result was considered to be satisfactory. Such results have been obtained in 40 patients and all of the normal subjects. For the remaining 10 patients, either experimental error and/or particular non-homogeneities in ventilation seemed to be the cause of the unsatisfactory results. Arterial to alveolar PCO2 differences have been calculated. The mean difference in normal subjects was never negative (1.86 +/- 1.58 torr).
H Guénard; M Chaussain
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Bulletin européen de physiopathologie respiratoire     Volume:  12     ISSN:  0395-3890     ISO Abbreviation:  Bull Eur Physiopathol Respir     Publication Date:    1976 Sep-Oct
Date Detail:
Created Date:  1977-04-25     Completed Date:  1977-04-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7605263     Medline TA:  Bull Eur Physiopathol Respir     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  625-36     Citation Subset:  IM    
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MeSH Terms
Analysis of Variance
Carbon Dioxide / analysis*,  blood
Computers, Analog
Heart Diseases / physiopathology
Oxygen / analysis
Partial Pressure
Pulmonary Alveoli / physiopathology*
Respiratory Function Tests* / instrumentation
Respiratory Tract Diseases / physiopathology*
Ventilation-Perfusion Ratio
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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

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