Table 2. Intraoperative variables of the patients.
| Variable | T1 | T2 | T3 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C group | P group | P | C group | P group | P | C group | P group | P | |||
| Ppeak (cmH2O) | 16.4±2.4 | 15.5±2.4 | 0.088 | 23.9±3.7 | 21.4±2.8 | 0.006 | 18.6±3.4 | 16.0±2.9 | 0.003 | ||
| Cldyn (mL/cm H2O) | 41.7±4.9 | 40.2±5.1 | 0.291 | 23.4±4.2 | 27.8±4.3 | 0.000 | 33.7±5.6 | 38.5±6.6 | 0.001 | ||
| PaO2 (mmHg) | 417.8±124.0 | 405.6±88.2 | 0.602 | 182.4±84.4 | 234.2±96.6 | 0.048 | 316.4±105.5 | 368.0±114.1 | 0.046 | ||
| PaCO2 (mmHg) | 41.7±3.4 | 39.3±4.4 | 0.258 | 39.9±4.9 | 42.7±4.6 | 0.286 | 40.9±5.3 | 39.5±4.8 | 0.369 | ||
| HR (beats/min) | 66.2±8.8 | 69.7±8.9 | 0.156 | 66.1±9.6 | 70.1±9.3 | 0.072 | 67.6±9.7 | 66.9±8.4 | 0.308 | ||
| MAP (mmHg) | 96.0±8.5 | 93.6±9.8 | 0.285 | 92.4±12.7 | 97.6±10.3 | 0.060 | 98.7±9.6 | 99.6±8.5 | 0.667 | ||
| CVP (mmHg) | 6.1±1.2 | 6.0±1.3 | 0.690 | 11.1±1.7 | 11.6±1.6 | 0.089 | 8.5±1.1 | 8.3±1.3 | 0.083 | ||
| CO (L/min) | 4.7±1.3 | 4.3±1.1 | 0.140 | 5.0±0.9 | 4.9±1.0 | 0.919 | 5.0±1.0 | 5.3±0.6 | 0.619 | ||
Numerical data are expressed as means ± SD. T1—endotracheal intubation for two-lung ventilation (TLV) when breathing and hemodynamics were stable; T2—after TLV was substituted with OLV when breathing and hemodynamics were stable; T3—OLV was substituted with TLV at the end of surgery when breathing and hemodynamics were stable. Ppeak, peak inspiratory pressure; Cdyn, dynamic compliance; PaO2, arterial oxygen tension; PaCO2, arterial carbon dioxide tension; HR, heart rate; MAP, mean arterial pressure; CVP, central venous pressure; CO, cardiac output.