Table 2. Intraoperative and perfusion data.
Data are shown as mean ± standard deviation, and categorical data as number (percentage).
CPB: cardiopulmonary bypass; PAO2: systemic oxygen tension during CPB; PACO2: systemic carbon dioxide tension during CPB; MAP: mean arterial pressure; CVP: central venous pressure; SvO2: mixed venous oxygen saturation.
| Variable | All patients (n = 50) | No AKI (n = 38) | AKI (n = 12) | P value |
| Operation time (min) | 325 ± 70 | 311 ± 57 | 367 ± 91 | 0.01 |
| Operation - CPB time (min) | 155 ± 42 | 154 ± 43 | 165 ± 42 | 0.45 |
| Anesthesia time (min) | 423 ± 82 | 406 ± 75 | 478 ± 85 | 0.007 |
| Anesthesia - CPB time (min) | 259 ± 45 | 249 ± 51 | 276 ± 41 | 0.11 |
| Intraoperative blood transfusion | 15 (30%) | 10 (26%) | 5 (41%) | 0.47 |
| Pump flow (L/min) | 3.8 ± 0.5 | 3.8 ± 0.5 | 4.0 ± 0.6 | 0.21 |
| Pump flow (L/min/m2) | 2.4 ± 0.2 | 2.5 ± 0.5 | 2.5 ± 0.5 | 0.30 |
| PAO2 (mmHg) | 271 ± 26 | 273 ± 28 | 268 ± 19 | 0.82 |
| PACO2 (mmHg) | 39 ± 4.5 | 39 ± 5.0 | 40 ± 2.2 | 0.60 |
| Hemoglobin (g/dL) | 9.5 ± 1.0 | 9.4 ± 1.0 | 9.6 ± 0.9 | 0.89 |
| Hematocrit (%) | 28 ± 3.0 | 29 ± 3.0 | 28 ± 3.0 | 0.81 |
| CPB time (min) | 168 ± 55 | 157 ± 41 | 202 ± 79 | 0.01 |
| Aorta clamp time (min) | 109 ± 52 | 101 ± 44 | 135 ± 67 | 0.04 |
| Mean MAP (mmHg) | 53 ± 9.6 | 52 ± 10 | 55 ± 6.9 | 0.39 |
| Mean CVP (mmHg) | 2.3 ± 1.5 | 2.4 ± 1.7 | 2.0 ± 0.9 | 0.74 |
| Mean SvO2 (%) | 86 ± 6.2 | 86 ± 7.1 | 87 ± 5.5 | 0.81 |
| Bottom temperature (℃) | 30 ± 2.7 | 30 ± 2.7 | 30 ± 2.6 | 0.62 |