[Hokkaido igaku zasshi] The Hokkaido journal of medical science
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Hokkaido Igaku Zasshi · Mar 1992
[Continuous Fick cardiac output measurement during inhalation anesthesia].
A computer based system that continuously monitors cardiac output (CO) and the other hemodynamic variables has been developed. Fick CO was calculated every 10 sec on breath by breath basis. The arterio-venous oxygen content difference was measured by a combination of a pulse oximeter and a fiberoptic oximeter. ⋯ The "limits of agreement" (mean difference +/- 2 SD of bias) were within +/- 1.12 l/min, which could be acceptable for clinical settings. When hemodynamic states were abruptly changed by an intravenous administration of isoproterenol, Fick CO reached 90% of EMCO change within 30 sec. The author concludes that this system provides virtually continuous hemodynamic analyses and facilitates more sophisticated circulatory control of the patients within a limited fluctuation.