Table 2.
Parameters comparison at baseline and 2 h after the PEEP titration
| Parameters | EIT group | Control group | P value (between groups) |
|---|---|---|---|
| Baseline | |||
| PaO2/FiO2 (mmHg) | 71.7 ± 16.6 | 69.7 ± 15.9 | 0.66 |
| APACHE II | 23.2 ± 6.4 | 23.5 ± 6.9 | 0.89 |
| PEEP (cmH2O) | 13.5 ± 1.9 | 11.5 ± 3.8 | 0.07 |
| Vt (ml/kg) | 6.0 ± 0.8 | 6.3 ± 1.1 | 0.27 |
| Pdriv (cmH2O) | 22.5 ± 2.2 | 23.0 ± 3.1 | 0.54 |
| Pplat (cmH2O) | 35.9 ± 0.9 | 34.4 ± 2.4 | < 0.01§ |
| Crs (ml/cmH2O) | 16.0 ± 1.8 | 16.0 ± 2.9 | 0.91 |
| 2 h after (except APACHE II) | |||
| PaO2/FiO2 (mmHg) | 163.7 ± 70.1* | 160.0 ± 77.8* | 0.86 |
| APACHE II (24 h) | 20.6 ± 5.3* | 22.7 ± 8.6 | 0.31 |
| PEEP (cmH2O) | 17.6 ± 3.6* | 13.6 ± 3.6* | < 0.01§ |
| Vt (ml/kg) | 6.3 ± 0.8 | 6.5 ± 1.2 | 0.59 |
| Pdriv (cmH2O) | 15.1 ± 3.1* | 19.1 ± 3.7* | < 0.01§ |
| Pplat (cmH2O) | 32.7 ± 2.6* | 32.6 ± 2.7* | 0.98 |
| Crs (ml/cmH2O) | 25.9 ± 5.9* | 20.4 ± 5.3* | < 0.01§ |
PaO2/FiO2: ratio of arterial partial pressure of oxygen and fraction of inspired oxygen, APACHE: acute physiology and chronic health evaluation, Vt: tidal volume per kilogram predicted body weight, Pdriv: driving pressure, Pplat: plateau pressure, Crs: respiratory system compliance
Significant differences compared to baseline values within each group are marked with * (P < 0.01). Significant differences between group are marked with §