Figure 1

Arterial partial pressure of oxygen (PaO ₂ ) of the pigs during the inhalation period. Mean values ± SEM of 15 (NCT) and 16 (NaCl) animals. * p < 0.05 between NCT and NaCl; p > 0.05 between NCT and NaCl for all other time-points (unpaired t test); p < 0.01 between time zero and all other time-points (paired t test).