Table 2.
Changes of nondependent/dependent TV, alveolo arterial (A-a) gradient, PaO2/FiO2 ratio and dynamic compliance over time—T0: before induction of anaesthesia; T1: 5 min after lateral positioning; T2: 90 min after lateral positioning
| PEEP | Pw | Pb | |||
|---|---|---|---|---|---|
| 0 | 5 | 10 | |||
| Nondependent/dependent TV | |||||
| T0 | 0.79 (0.12–1.47) | 0.79 (0.14–1.44) | 1.2 (0.55–1.85) | <0.01 | 0.03 |
| T1 | 2.3 (1.62–2.97) | 2.23 (1.58–2.89) | 0.77 (0.12–1.43) | ||
| T2 | 3.3 (2.61–3.97) | 2.52 (1.86–3.17) | 0.91 (0.26–1.57) | ||
| A-a gradient (kPa) | |||||
| T0 | 3.6 (0.4–6.8) | 4.2 (1.0–7.5) | 3.2 (0–6.4) | 0.02 | 0.04 |
| T1 | 13.1 (9.9–16.3) | 12.8 (9.6–15.9) | 4.6 (1.4–7.8) | ||
| T2 | 15.1 (11.9–18.3) | 16.4 (13.2–19.6) | 10.2 (7–13.4) | ||
| PaO2/FiO2 (mmHg) | |||||
| T0 | 374 (322–425) | 338 (286–389) | 375 (323–426) | <0.01 | 0.09 |
| T1 | 386 (334–437) | 389 (337–440) | 515 (463–566) | ||
| T2 | 343 (291–394) | 292 (240–343) | 411 (360–462) | ||
| Dynamic compliance (ml/mbar) | |||||
| T1 | 41 (36–47) | 39 (34–45) | 46 (41–51) | 0.12 | 0.49 |
| T2 | 39 (34–45) | 42 (37–48) | 45 (40–50) | ||
Bold values indicate the statistically significant differences between groups
Values are expressed as mean and 95% confidence interval
Two-factor repeated measures ANOVA. Pw—within group interactions, Pb—between groups interactions with post hoc Bonferroni correction