Determination of oxygen delivery and consumption versus cardiac index and oxygen extraction ratio

Vincent, J.L.

Critical Care Clinics 12(4): 995-1006


ISSN/ISBN: 0749-0704
PMID: 8902380
DOI: 10.1016/s0749-0704(05)70288-8
Accession: 045748581

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Measuring cardiac output without knowledge of the oxygen extraction by the tissues is of limited value. Instead of calculating oxygen consumption and oxygen delivery, a diagram relating cardiac index to the oxygen extraction ratio is proposed to interpret hemodynamic data at the bedside. This diagram is particularly helpful in interpreting cardiac index in the presence of changes in hemoglobin or oxygen demands and in evaluating the effects of therapy.