Figure 4

ROC curves showing the relationship between sensitivity and specificity in determining the discrimination of ΔCI _PC and ΔCI _ECOM in predicting fluid responsiveness. The dotted diagonal line is the no-discrimination curve. No significant difference was found between ROC curves. ΔCI_ECOM = change in cardiac index ECOM during passive leg raising; ΔCI_PC = change in cardiac index pulse contour analysis during passive leg raising; ROC = receiver operating characteristic curve.