- The mean of PaO2 in JV group was significantly higher than in AIV group (p<0.001), 308.8 ± 130.0; 295.63 ± 124.02 mmHg versus 193.9 ± 97.7; 127.88 ± 96.62 mmHg after 15 minutes, 30 minutes of ventilation, respectively.