Fig. 3From: Accuracy of the end-expiratory lung volume measured by the modified nitrogen washout/washin technique: a bench studyFour-Quadrant Plot for the determination of trending abilities. Changes in Volume induced by PEEP are plotted (on x-axis) versus the measured changes in volume on the y-axis. The regression equation for changes in measured volume is 27.025 ml + 0.937 * change in set volumeBack to article page