Fig. 3From: Control of the expiratory flow in a lung model and in healthy volunteers with an adjustable flow regulator: a combined bench and randomized crossover studyA Airway flow, B lung pressure (Plung), and C expiratory airway resistance (RAW) for an exemplary set of 9 different settings with decreasing aperture of the flow regulator during mandatory ventilation of a lung model. For each setting, one ventilation cycle is plotted beginning at the axis origin. Note that the inspiratory phase is unchanged by the different settings. In B, the pressure behind the flow regulator (Ppost) is depicted as dashed line. In C, abrupt rise in RAW (arrows) indicates the plate deflection, abrupt drop in RAW (arrow heads) indicates the backswing of the plateBack to article page