Ventilatory and respiratory mechanics parameters over time. Positive end-expiratory pressure (PEEP), plateau pressure (Pplat), driving pressure (ΔP), and dynamic compliance (Cdyn) for the forced oscillation technique (FOT) group (closed symbols) and for the acute respiratory distress syndrome (ARDS)Net group (open symbols). Data are presented as mean ± standard deviation. Significance of differences between the two groups at any protocol step are also reported. *, P < 0.01; +, P < 0.05.