Figure 1

Mean difference in cardiac output as a function of mean cardiac output. Mean difference in cardiac output, measured by arterial pressure-based cardiac output (APCO) and intermittent thermodilution cardiac output (ICO) or measured by continuous cardiac output (CCO) and ICO, as a function of mean cardiac output. The difference in cardiac output as determined by the two methods is plotted against the mean cardiac output: upper, (APCO + ICO)/2; lower, (CCO + ICO)/2. Central solid line, mean difference; dashed lines, limits of agreement (95% confidence intervals). n = 84 patients; 561 data points.