Table 2. Intraoperative and postoperative data for the overall studied population, the CV subgroup and the PV subgroup.
| Intraoperative and postoperative data | All (n=28) | CV (n=13) | PV (n=15) | P value* |
|---|---|---|---|---|
| OLV duration (min) | 64.44±21.68 | 60.62±23.67 | 67.50±20.72 | 0.138 |
| VT (mL) | 430.83±174.64 | 591.87±131.58 | 302.00±51.43 | 0.001 |
| VT [mL/kg (PBW)] | 7.4 2±2.07 | 9.5±0.63 | 5.6±0.71 | 0.001 |
| Fluids (mL·kg−1·h−1) | 5.66±1.13 | 5.70±0.99 | 5.63±1.29 | 0.619 |
| Compliance 15 min (mL/cm H2O) | 27.28±10.93 | 24.62±9.88 | 29.4±11.77 | 0.536 |
| Compliance 30 min (mL/cmH2O) | 23.28±11.21 | 25.50±9.46 | 21.50±12.65 | 0.428 |
| EtCO2 15 min (mmHg) | 34.92±6.48 | 32.81±6.38 | 36.47±6.36 | 0.172 |
| EtCO2 30 min (mmHg) | 33.5± 5.35 | 30.00±4.92 | 35.00± 5.38 | 0.036 |
| SpO2 15 min (%) | 97.00±3.19 | 98.00±2.72 | 97.0±3.50 | 0.300 |
| SpO2 30 min (%) | 96.00±2.85 | 98.00±1.86 | 95.00± 2.98 | 0.027 |
| P peak 15 min (cmH2O) | 28.00±7.89 | 29.00±5.12 | 22.00±8.21 | 0.016 |
| P peak 30 min (cmH2O) | 29.00±6.84 | 30.00±4.52 | 26.00±7.04 | 0.027 |
| P plateau 15 min (cmH2O) | 21.00±6.28 | 23.50±4.7 | 16.00±6.31 | 0.014 |
| P plateau 30 min (cmH2O) | 23.00±5.48 | 25.00±5.4 | 22.00±4.91 | 0.87 |
| MAP 15 min (mmHg) | 85.08±12.60 | 88.91±13.72 | 82.27±11.36 | 0.208 |
| MAP 30 min (mmHg) | 75.88±12.21 | 77.27±12.49 | 74.87±12.34 | 0.629 |
| HR 15 min (bpm) | 64.46±10.03 | 62.18±7.36 | 66.13±11.57 | 0.328 |
| HR 30 min (bpm) | 60.50±11.57 | 56.55±6.99 | 63.4 ±13.52 | 0.138 |
| PaO2 (mmHg, ABG 30 min) | 117.73±51.10 | 99.64±28.79 | 131.00±60.21 | 0.102 |
| PaCO2 (mmHg, ABG 30 min) | 44.81±6.60 | 39.36±4.52 | 48.80±4.78 | 0.001 |
| PaO2/FiO2 ratio (mmHg, ABG 30 min) | 236.77±101.23 | 202.55±55.24 | 261.87±120.51 | 0.117 |
| pH | 7.39±0.07 | 7.44±0.23 | 7.33±0.04 | 0.098 |
| HCO3− (mmol/L) | 27.30±2.45 | 26.38±2.52 | 25.11±1.91 | 0.60 |
| RR 15 min (bpm) | 12.00± 2.73 | 12.00±1.73 | 14.00± 2.97 | 0.427 |
| RR 30 min (bpm) | 14.31±3.16 | 11.64±1.91 | 16.27±2.34 | 0.001 |
| Length of stay (days) | 4.19±1.69 | 4.45±2.07 | 4.00±1.41 | 0.511 |
The data is expressed as mean ± SD (95% CI). *, P value by t-test or Mann-Whitney U test, as appropriate. Compliance is respiratory system compliance. HR, heart rate; EtCO2, end-tidal partial pressure of carbon dioxide; MAP, mean arterial pressure; OLV, one-lung ventilation; PaCO2, arterial blood carbon dioxide tension; PaO2, arterial blood oxygen tension; P peak, peak airway pressure; P plateau, plateau airway pressure; RR, respiratory rate; SpO2, peripheral oxygen saturation; VT, tidal volume; CV, conventional ventilation; PV, protective ventilation.