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Canadian Journal of Anesthesia, Vol 22, 460-465, Copyright © 1975 by Canadian Anesthesiologists' Society

A Method for Measuring Oxygen Consumption and Cardiac Output in Intensive Care Units

JOHN L. HOYT 1 and AZMY R. BOUTROS 1

1 Department of Anesthesiology and Intensive Care Unit, University of Iowa Hospitals, Iowa City, Iowa 52242

A simplified measurement of oxygen consumption was investigated in 15 spontaneously ventilating and 11 apnoeic patients in the intensive care unit following open-heart surgery, using a Godart Pulmonet type lie. Three consecutive measurements were performed on each patient to define the reproducibility of the method. The coefficient of variation of VOO2 was ±3.16 per cent and ±3.42 per cent in spontaneously breathing and apnoeic patients respectively. Arteriomixed venous oxygen difference (CaOO2-CvOO2) was also measured and cardiac output (CO) calculated using the Fick principle, in the spontaneously ventilating patients. Coefficient of variation of CaOO2-CvOO2 and CO values were ±4.63 per cent and ±4.70 per cent respecetively.






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Copyright © 1975 by the Canadian Anesthesiologists' Society.