Document Detail


The effect of short-term oxygen supplementation on oxygen hemoglobin affinity in patients with chronic obstructive pulmonary disease.
MedLine Citation:
PMID:  3917634     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In 12 hypoxemic patients with chronic obstructive pulmonary disease, the partial pressure of oxygen at which hemoglobin is 50% saturated (P50) and levels of 2,3-diphosphoglycerate (2,3-DPG) were determined under 3 study conditions: (1) while breathing room air, (2) during oxygen supplementation for 72 h sufficient to increase PaO2 above 70 mmHg, and (3) at 72 h after the period of oxygen supplementation. The data showed that in the control period in hypoxemic (PaO2, 52 +/- 6 mmHg), mildly hypercapnic (PaCO2, 47 +/- 6 mmHg) patients with a borderline elevation of pH (7.42 +/- 0.03), there was an increase in P50 (28.6 +/- 1.6 versus a normal value of 26.5 +/- 1; p less than 0.005), and a concomitant increase in 2,3-DPG (19.02 +/- 1.77 mg/g Hb versus a normal value of 13.52 +/- 1.27; p less than 0.005). Nine patients received oxygen for 24 h, and 5 received oxygen for 72 h. In these 5 patients, oxygen supplementation resulted in a shift in P50 to a normal value of 26.7 +/- 1.8 (this value was different from the patients' level while breathing room air and not different from that of the normoxemic control subjects) and a decrease in 2,3-DPG toward but not to a normal value (16.34 +/- 1.92; p less than 0.01). This shift in P50 to the left could be related to the decrease in 2,3-DPG. Accordingly, in patients with COPD who are treated with supplemental oxygen, the net effect on oxygen transport would be a function of the changes produced in PaO2 versus those in hemoglobin-oxygen affinity.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
R M Timms; G M Tisi
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The American review of respiratory disease     Volume:  131     ISSN:  0003-0805     ISO Abbreviation:  Am. Rev. Respir. Dis.     Publication Date:  1985 Jan 
Date Detail:
Created Date:  1985-02-15     Completed Date:  1985-02-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0370523     Medline TA:  Am Rev Respir Dis     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  69-72     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
2,3-Diphosphoglycerate
Arteries
Carbon Dioxide / blood
Diphosphoglyceric Acids / blood
Erythrocytes / metabolism
Hemoglobins / metabolism*
Humans
Lung Diseases, Obstructive / blood,  drug therapy*
Male
Oxygen / administration & dosage*,  blood,  therapeutic use
Partial Pressure
Time Factors
Grant Support
ID/Acronym/Agency:
N0L-HR-2946/HR/NHLBI NIH HHS
Chemical
Reg. No./Substance:
0/Diphosphoglyceric Acids; 0/Hemoglobins; 124-38-9/Carbon Dioxide; 138-81-8/2,3-Diphosphoglycerate; 7782-44-7/Oxygen

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


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