Table 2. Perioperative variables and main outcomes.
| Intraoperative variables | n = 966 |
|---|---|
| Aortic cross clamp time (minutes) | 79.3 (48.3) |
| Cardiopulmonary bypass time (minutes) | 109.3 (52.4) |
| Intraoperative diuretic use, n (%) | 262 (27.1) |
| Intraoperative anemia*, n (%) | 386 (40.0) |
| Intraoperative RBC transfusion, n (%) | 509 (52.7) |
| Intraoperative vasopressor use, n (%) | 457 (47.3) |
| Minimum intraoperative hemoglobin | 8.4 (1.7) |
| Postoperative variables | |
| Postoperative minimum hemoglobin | 9.5 (1.7) |
| Postoperative transfusion requirement, n (%) | 408 (42.2) |
| pHb-AUC | 19.8 (2.7) |
| Outcomes | |
| AKI | 360 (37.3%) |
| KDIGO 1 (% of AKI) | 212 (58.9%) |
| KDIGO 2 (% of AKI) | 75 (20.8%) |
| KDIGO 3 (% of AKI) | 73 (20.3%) |
| Hospital length of stay | 15.1 (15.4) |
| ICU length of stay | 5.0 (8.4) |
| Overall hospital mortality, n (%) | 45 (4.7) |
| Renal replacement therapy, n (%) | 40 (4.1) |
Values are expressed as mean (standard deviation), unless otherwise stated.
AKI: acute kidney injury; ICU: intensive care unit; KDIGO: Kidney Disease: Improving Global Outcomes; pHb-AUC: perioperative hemoglobin area under the curve; RBC: red blood cells
*Anemia was defined as Hb < 8 g/dl