Figure 4:

(a) The correlation between rSO₂T values during HFRCP and the increase in serum creatinine after aortic arch reconstruction. (b) ROC analysis of rSO₂T to predict the increase in creatinine of ≧0.3 mg/dl after arch reconstruction. The AUC was 0.79 with a sensitivity of 0.73 and a specificity of 0.81. A cut-off value of rSO₂T of ≦48% was a predictor of postoperative increase in the creatinine of ≧0.3 mg/dl. AUC: area under the ROC; HFRCP, high-flow regional cerebral perfusion; ROC: receiver operating curve; rSO₂T: regional oxygen saturation of the thigh.