Document Detail

Calculation of the VD/VT ratio by the helium washout technique.
MedLine Citation:
PMID:  3086019     Owner:  NLM     Status:  MEDLINE    
In four normal subjects and 51 patients with chronic bronchitis-emphysema, bronchial asthma and pulmonary fibrosis, the VD/VT ratio was measured by a helium washout technique (wVD/VT) and by the conventional Bohr's method using the arterial CO2 tension (VD/VT). In 16 patients the wVD/VT ratio was compared with that calculated from Bohr's equation with the alveolar CO2 tension measured by the rebreathing technique (AVD/VT). It was found that the values for the VD/VT ratio obtained by the helium washout technique were very close to those obtained by the conventional method using the PaCO2 or PACO2 values.
J Jordanoglou; G Tatsis; Z Bissiouli
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article    
Journal Detail:
Title:  Clinical science (London, England : 1979)     Volume:  70     ISSN:  0143-5221     ISO Abbreviation:  Clin. Sci.     Publication Date:  1986 Jun 
Date Detail:
Created Date:  1986-06-27     Completed Date:  1986-06-27     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7905731     Medline TA:  Clin Sci (Lond)     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  565-9     Citation Subset:  IM    
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MeSH Terms
Asthma / physiopathology
Carbon Dioxide / blood
Helium / diagnostic use
Lung Diseases, Obstructive / physiopathology
Pulmonary Fibrosis / physiopathology
Respiratory Dead Space*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7440-59-7/Helium

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

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