Tidal volume
Compared to supine position, prone position did not yield changes in tidal volume (all Tidal volume distribution (expressed in % of global tidal volume) in supine and prone position. Results are expressed as means (standard deviation). Prone position promoted tidal volume distribution towards dorsal, dependent lung regionsGiven the unchanged ΔPendelluft was common in our cohort (31% [14–55] of tidal volume during supine position, 55% [7–57] during prone position, 44% [13–66] after re-supination), without significant differences between treatments (