Document Detail

A clinically oriented nomogram for the derivation and interpretation of alveolar-arterial oxygen gradients.
MedLine Citation:
PMID:  6770728     Owner:  NLM     Status:  MEDLINE    
This paper is designed for those familiar with arterial blood gases, alveolar-arterial (A-a) oxygen gradients, and their application in the clinical setting. The concept of a gradient is reviewed, and several examples of clinical applications are given. A nomogram of A-a gradients is presented for two representative altitudes. Using only the PaO2 and PaCO2 available from blood gases, the corresponding A-a gradient can be found quickly. Further, the nomogram is presented in such a way as to facilitate interpretation of results. Finally, we present a computer program that will allow the production of a nomogram of A-a gradients appropriate for a specific altitude.
J D Allingham
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Annals of emergency medicine     Volume:  9     ISSN:  0196-0644     ISO Abbreviation:  Ann Emerg Med     Publication Date:  1980 Jun 
Date Detail:
Created Date:  1980-08-28     Completed Date:  1980-08-28     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8002646     Medline TA:  Ann Emerg Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  323-6     Citation Subset:  IM    
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MeSH Terms
Blood Gas Analysis / methods*
Carbon Dioxide / blood
Middle Aged
Oxygen / blood*
Partial Pressure
Pulmonary Alveoli / physiology*
Respiratory Function Tests / methods
Respiratory Insufficiency / diagnosis
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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