Figure 4.

Pressure volume–curves at baseline and at 25 min after the two procedures of endotracheal suctioning. The volumes are normalized to the absolute lung volume at an airway pressure of 17.5 cmH₂O at baseline. Values are expressed as means ± SEM (bars). ^#P < 0.05 between ETS-LR baseline curve and ETS-LR 25 min curve. ETS+LR, endotracheal suctioning followed by a lung recruitment manoeuvre; ETS-LR, endotracheal suctioning without a following lung recruitment manoeuvre.