Fig. 4

Four-quadrant plots of consecutive differences across time in A. systolic blood pressure (SBP), B. diastolic blood pressure (DBP) and C. mean arterial pressure (MAP), comparing measurements obtained from the non-invasive arm cuffs (NIBP) and invasive arterial monitoring (INV). Grey squares indicate +/− 5 mmHg exclusion zone. Top left and bottom right quadrants indicate discordant pairs