Document Detail


Nomograms for calculation of oxygen consumption and respiratory exchange ratio.
MedLine Citation:
PMID:  5078404     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Nomograms have been prepared whereby the respiratory exchange ratio may be derived from the concentrations of carbon dioxide and oxygen in expired gas and oxygen consumption from the volume and oxygen concentration of expired gas; they apply only to patients breathing room air. The nomogram for the respiratory exchange ratio has an error of less than 0.01, which is the limit of visual discrimination on the nomogram. The nomogram for oxygen consumption has an error of standard deviation 7.73 ml/min. This error may be substantially reduced by excluding cases with a respiratory exchange ratio outside the range 0.70-0.93. Under these conditions the maximum error was 10 ml/min, which is acceptable for a wide range of clinical purposes.
Authors:
J F Nunn
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British medical journal     Volume:  4     ISSN:  0007-1447     ISO Abbreviation:  Br Med J     Publication Date:  1972 Oct 
Date Detail:
Created Date:  1972-12-21     Completed Date:  1972-12-21     Revised Date:  2010-10-26    
Medline Journal Info:
Nlm Unique ID:  0372673     Medline TA:  Br Med J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  18-20     Citation Subset:  AIM; IM; S    
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MeSH Terms
Descriptor/Qualifier:
Air
Atmospheric Pressure
Carbon Dioxide*
Humans
Mathematics*
Oxygen*
Oxygen Consumption*
Physical Exertion
Respiration*
Temperature
Vision, Ocular
Chemical
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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