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End-expiratory lung volume (EELV) expressed as percentage of baseline, at time points before (baseline) and after the two endotracheal suctioning procedures. Endotracheal suctioning (●) with and (○) without a following lung recruitment manoeuvre. Values are expressed as means ± SEM (bars). *P < 0.05 between the two procedures, §P < 0.01, within the procedures between the measurements.
