Figure 5.

Bland-Altman plot of the difference in ${\text{SvO}}_2^{\text{SVC}}$ and ${\text{SvO}}_2^{\text{NIRS}}$ versus the mean of these two parameters. The solid horizontal line indicates the mean difference between these two parameters; the dotted lines indicate the 95% limits of agreement. ${\text{SvO}}_2^{\text{NIRS}}$, venous saturation measured noninvasively with near-infrared spectroscopy; ${\text{SvO}}_2^{\text{SVC}}$, venous saturation measured from a blood sample from the superior vena cava.