Figure 3
Predicted blood gas (BG) pH and PCO2 results on validation samples. Subplots (a,b) show the scatter plots of the model generated point-estimate and laboratory-derived pH and PCO2, while (c,d) show Bland–Altman plots for these estimations. Subplot (e) shows a patient example where the estimate at time \(\mathrm{t}=0\) is made accurately with low uncertainty, and (f) shows a patient example where the estimate at time \(\mathrm{t}=0\) is abstained on the basis of high prediction uncertainty. In the scatter plots (a,b), the blue shaded regions are the 95% percentile for all samples. The three pH or PCO2 regions are separated by vertical and horizontal dashed lines. In the Bland–Altman plots, the middle solid line shows mean predicted error, and the top and bottom dashed lines show ± 1.96 standard deviation.
