| Improved oxygen delivery to the myocardium during hypothermia by perfusion with 2,3 DPG-enriched red blood cells. | |
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MedLine Citation:
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PMID: 6781425 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The oxygen affinity of red cells increases stepwise with temperature reductions below 37 degrees C. In vitro studies demonstrated that biochemically modified red cells with increased 2,3 diphosphoglycerate (2,3 DPG) (150% and 250% of normal) exhibited significantly less oxygen affinity at 24 degrees C than did unmodified cells. At 15 degrees C, significant attenuation of affinity was observed with 250%, but not 150%, of normal 2,3 DPG cells. Measurements made of isolated fibrillating dog hearts during perfusion at 24 degrees C alternately with unmodified (80% of normal 2,3 DPG) and modified (300% of normal 2,3 DPG) red cells demonstrated significantly greater oxygen consumption, higher coronary sinus partial pressures of oxygen and carbon dioxide, higher in vitro P50 values, and lower arterial and coronary sinus lactate levels during perfusion with modified as compared with unmodified cells. This evidence, indicating improved oxygen delivery to hypothermic dog hearts by red cells with 300% of normal 2,3 DPG activity, suggests that high 2,3 DPG cells might protect myocardial tissue in patients undergoing hypothermic cardiac operation. |
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Authors:
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C R Valeri; M Yarnoz; J J Vecchione; R C Dennis; J Anastasi; D A Valeri; L E Pivacek; H B Hechtman; C P Emerson; R L Berger |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The Annals of thoracic surgery Volume: 30 ISSN: 0003-4975 ISO Abbreviation: Ann. Thorac. Surg. Publication Date: 1980 Dec |
Date Detail:
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Created Date: 1981-04-13 Completed Date: 1981-04-13 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 15030100R Medline TA: Ann Thorac Surg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 527-35 Citation Subset: AIM; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Carbon Dioxide / metabolism Diphosphoglyceric Acids / administration & dosage* Dogs Erythrocytes* / metabolism Humans Hypothermia, Induced* Myocardium / metabolism* Oxygen Consumption* Perfusion* |
| Chemical | |
Reg. No./Substance:
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0/Diphosphoglyceric Acids; 124-38-9/Carbon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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