Fig. 3. Correlation of skin oxygen saturation and cerebral oxygen saturation during administration of norepinephrine with and without PETCO2correction, represented as red dots , and whole-body heating presented as blue dots . For all data in the plot, r = 0.64 (P < 0.0001), with r = 0.6 (P < 0.0001) for administration of norepinephrine and r = 0.4 (P = 0.15) for whole-body heating. scO2= cerebral oxygen saturation; sskinO2= skin oxygen saturation.