Bland–Altman plot illustrating the bias between the nonnormalized TOF-Watch SX (Organon, Ireland) measurements and the TOFscan (Drager Technologies, Canada) measurements made up to nine times over the range of measurement in 23 patients (Bias, dark green) and its 95% CI (light green), as well as the 95% upper and lower limits of agreement (ULoA and LLoA, respectively, dark red) and their 95% CIs (light red). Patient data are plotted with the patient number next to the closed circle representing each measurement in that patient.