Table 4. Comparison of respiratory dynamic, arterial blood gas and haemodynamic parameters between the PEEP5 and PEEPEIT groups at different time points.
| Parameters | Group | DLV | OLV 0.5 h | OLV 1 h | DLV-End of operation |
|---|---|---|---|---|---|
| Respiratory dynamic parameters | |||||
| Ppeak (cmH2O) | PEEP5 | 21.7±2.8 | 25.5±4.0 | 25.7±3.8 | 22.2±2.9 |
| PEEPEIT | 20.7±4.1 | 27.6±3.8* | 27.7±4.6* | 21.2±3.8 | |
| Pplat (cmH2O) | PEEP5 | 19.6±2.9 | 23.5±3.8 | 23.7±3.7 | 20.2±2.9 |
| PEEPEIT | 18.7±4.2 | 25.6±3.8* | 25.8±4.8* | 19.0±3.8 | |
| Pmean (cmH2O) | PEEP5 | 9.7±2.2 | 10.2±1.6 | 11.3±2.0 | 10.6±3.4 |
| PEEPEIT | 10.5±3.5 | 14.4±2.8* | 13.4±2.3* | 11.7±2.7 | |
| Arterial blood gas analysis parameters | |||||
| pH | PEEP5 | 7.38±0.05 | 7.36±0.04 | 7.37±0.04 | 7.37±0.06 |
| PEEPEIT | 7.39±0.05 | 7.32±0.42 | 7.38±0.05 | 7.41±0.05* | |
| PCO2 (mmHg) | PEEP5 | 42.3±7.5 | 40.7±5.2 | 41.2±5.1 | 40.8±5.4 |
| PEEPEIT | 39.9±5.2 | 40.0±5.0 | 40.4±4.3 | 36.8±5.7* | |
| Haemodynamic parameter | |||||
| MAP (mmHg) | PEEP5 | 81.2±14.3 | 76.9±12.9 | 75.8±13.0 | 86.1±15.3 |
| PEEPEIT | 76.6±11.7 | 76.8±16.3 | 79.4±15.3 | 85.8±12.8 | |
Ppeak, airway peak pressure; Pplat, Platform pressure; Pmean, mean airway pressure; PaCO2, partial pressure of carbon dioxide in artery; MAP, mean arterial blood pressure; compared with the PEEP5 group, *P<0.05.