Fig. 6.
Quantitative distributions of atelectatic, trapped, and poorly aerated (PA) and normally aerated (NA) regions between dependent (triangles), middle (squares), and nondependent (diamonds) image slices; PA and NA regions are subdivided into regions with low, normal, or high , and expressed as percentage (mean ± SD) of imaged lung area within each region of interest (ROI; dependant, middle, nondependant); = specific ventilation; PEEP = positive end-expiratory pressure. * P < 0.05 versus control PEEP3; # P < 0.05 versus the nondependent image slice.