Table 2.
Intergroup differences in respiratory mechanics.
| Group | T1 | T2 | T3 | T4 | T5 | |
|---|---|---|---|---|---|---|
| PPLAT (cmH2O) | A | 11.8 ± 2.0 | 18.4 ± 2.3 | 21.9 ± 2.5 | 20.5 ± 2.5 | 11.6 ± 2.3 |
| B | 11.8 ± 2.7 | 18.6 ± 2.6 | 21.4 ± 2.7 | 19.8 ± 2.4 | 12.5 ± 2.8 | |
| PPEAK (cmH2O) | A | 14.1 ± 2.3 | 22.6 ± 2.5 | 26.9 ± 3.1 | 24.5 ± 3.3 | 14.3 ± 2.4 |
| B | 14.8 ± 2.4 | 24.0 ± 3.5 | 26.2 ± 3.8 | 24.6 ± 3.2 | 15.6 ± 2.7 | |
| CPAT (mL.cm-1 H2O) | A | 41.7 ± 6.0 | 23.3 ± 4.8 | 28.9 ± 4.9a | 32.0 ± 5.1b | 41.8 ± 6.3a |
| B | 39.3 ± 6.5 | 21.0 ± 4.5 | 26.3 ± 4.4 | 28.1 ± 4.3 | 37.6 ± 6.6 | |
| ΔP (cmH2O) | A | 11.8 ± 2.0 | 18.4 ± 2.3 | 13.1 ± 3.2b | 11.7 ± 3.3b | 11.6 ± 2.3 |
| B | 11.8 ± 2.7 | 18.6 ± 2.6 | 16.4 ± 2.7 | 14.8 ± 2.4 | 12.5 ± 2.8 |
Values are expressed as mean ± SD for continuous variables and two independent samples t-test is used for inter-group comparisons.
Group A is the experimental group; Group B is the control group.
Two independent samples t-test ap < 0.05, Group A vs. Group B.
Two independent samples t-test bp < 0.01, Group A vs. Group B.
PPLAT, Plateau Pressure; PPEAK, Peak Pressure; CPAT, Pulmonary Compliance; ΔP, Driving Pressure; T1, 10 min after intubation; T2, before ARM; T3, 20 min after the application of optimal PEEP; T4, at the end of one-lung ventilation; T5, at the end of surgery.