Acute normovolemic hemodilutlon: advantages and limitations

Although arterial oxygen content is decreased after acute normovolemic hemodilution (ANH), blood rheology is improved and cardiac output is increased through increased venous return. To meet metabolic demand, tissue oxygen extraction is increased and the sympathetic nervous system is activated only...

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Published inRevue médicale suisse Vol. 2; no. 88; p. 2670
Main Authors Ellenberger, Christoph, Licker, Marc
Format Journal Article
LanguageFrench
Published Switzerland 22.11.2006
Subjects
Cardiac Output
Hematocrit
Hemodilution - methods
Hemoglobins - metabolism
Humans
Myocardial Ischemia - prevention & control
Oxygen - blood
Oxygen Consumption
Transfusion Reaction
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ISSN1660-9379

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Abstract Although arterial oxygen content is decreased after acute normovolemic hemodilution (ANH), blood rheology is improved and cardiac output is increased through increased venous return. To meet metabolic demand, tissue oxygen extraction is increased and the sympathetic nervous system is activated only in awake subjects. In man, hemoglobin levels of < 40-50 g/L may induce anaerobic cell metabolism. The transfusion threshold should take into account the individual patient metabolic needs and the associated cardio-pulmonary diseases. Better tissue blood flow distribution and erythropoietin liberation resulting from ANH may potentially attenuate myocardial ischemic injuries. ANH is poorly effective in reducing the necessity of allogenic blood transfusion, especially in centres where a restrictive transfusion policy is already implemented.
AbstractList Although arterial oxygen content is decreased after acute normovolemic hemodilution (ANH), blood rheology is improved and cardiac output is increased through increased venous return. To meet metabolic demand, tissue oxygen extraction is increased and the sympathetic nervous system is activated only in awake subjects. In man, hemoglobin levels of < 40-50 g/L may induce anaerobic cell metabolism. The transfusion threshold should take into account the individual patient metabolic needs and the associated cardio-pulmonary diseases. Better tissue blood flow distribution and erythropoietin liberation resulting from ANH may potentially attenuate myocardial ischemic injuries. ANH is poorly effective in reducing the necessity of allogenic blood transfusion, especially in centres where a restrictive transfusion policy is already implemented.Although arterial oxygen content is decreased after acute normovolemic hemodilution (ANH), blood rheology is improved and cardiac output is increased through increased venous return. To meet metabolic demand, tissue oxygen extraction is increased and the sympathetic nervous system is activated only in awake subjects. In man, hemoglobin levels of < 40-50 g/L may induce anaerobic cell metabolism. The transfusion threshold should take into account the individual patient metabolic needs and the associated cardio-pulmonary diseases. Better tissue blood flow distribution and erythropoietin liberation resulting from ANH may potentially attenuate myocardial ischemic injuries. ANH is poorly effective in reducing the necessity of allogenic blood transfusion, especially in centres where a restrictive transfusion policy is already implemented.
Although arterial oxygen content is decreased after acute normovolemic hemodilution (ANH), blood rheology is improved and cardiac output is increased through increased venous return. To meet metabolic demand, tissue oxygen extraction is increased and the sympathetic nervous system is activated only in awake subjects. In man, hemoglobin levels of < 40-50 g/L may induce anaerobic cell metabolism. The transfusion threshold should take into account the individual patient metabolic needs and the associated cardio-pulmonary diseases. Better tissue blood flow distribution and erythropoietin liberation resulting from ANH may potentially attenuate myocardial ischemic injuries. ANH is poorly effective in reducing the necessity of allogenic blood transfusion, especially in centres where a restrictive transfusion policy is already implemented.
Author Ellenberger, Christoph
Licker, Marc
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SubjectTerms Cardiac Output
Hematocrit
Hemodilution - methods
Hemoglobins - metabolism
Humans
Myocardial Ischemia - prevention & control
Oxygen - blood
Oxygen Consumption
Transfusion Reaction
Title Acute normovolemic hemodilutlon: advantages and limitations
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