Table 2. Intraoperative data.
| Variables | Group C (n=23) | Group O (n=23) | P value |
|---|---|---|---|
| Anesthesia duration (min) | 227.3±7.8 | 218.7±5.6 | 0.38 |
| Surgery duration (min) | 169.1±6.4 | 174.1±4.2 | 0.47 |
| Total amount of fluid infusion (mL) | 2,070±56.7 | 1,904±68.4 | 0.07 |
| Blood loss (mL) | 118.7±10.0 | 97.8±5.9 | 0.08 |
| Urinary output (mL) | 347.8±37.7 | 358.7±51.7 | 0.87 |
| Pneumoperitoneum pressure (mmHg) | 14 | 14 | – |
| Vasoactive injections | |||
| Received medication, n (%) | 21 (91.3) | 22 (95.7) | 0.55 |
| Ephedrine (mg) | 6.8±1.0 | 7.2±1.2 | 0.80 |
| Phenylephrine (μg) | 194.8±44.9 | 183.0±52.0 | 0.87 |
| P(A-a) O2 pre-extubation (kPa) | 9.0±2.0 | 3.62±0.9 | 0.01 |
| SpO2 <92% at PACU on room air | 7 (30.4) | 1 (4.3) | 0.02 |
Data are presented as mean ± SD or number (%). Group C, control group with a fixed PEEP of 5 cmH2O; group O, optimized PEEP group with an individualized PEEP at which SpO2 was maintained at 95–96% with minimal FiO2; P(A-a) O2, alveolar-arterial gradient; PACU, postanesthesia care unit.