Fig. 3From: Fluid responsiveness predicted by transcutaneous partial pressure of oxygen in patients with circulatory failure: a prospective studyReceiver-operating characteristic (ROC) curves showing the diagnostic ability of volume expansion and PLR-induced changes in PtcO2 to predict volume responsiveness. PLR, passive leg raising. PtcO2, transcutaneous partial pressure of oxygen. n = 34, *p < 0.05 for the comparison between areas under the curvesBack to article page