Fig. 4. Graphs representing mean (SD) arterial oxygen pressures (Po2; A ) and peak airway pressures ( B ) at baseline and over the course of the protocol in the presence of antibiotic therapy in normocapnia (n = 10) and hypercapnic acidosis (HCA; n = 10). Data are mean ± SD. * P < 0.05 indicates significant within group change from baseline. P = NS indicates that the overall comparison between HCA and normocapnia was not significantly different.
