Table 2. Intraoperative variables.
| Variable | NON-ARD | ARD | OR (95% CI) | p-value |
|---|---|---|---|---|
| (n = 90) | (n = 111) | |||
| Surgical procedure: | ||||
| Aortic root replacement | 51 [50] | 51 [50] | reference | |
| Hemiarch replacement | 29 [39] | 45 [61] | 1.55 (0.85, 2.85) | 0.156 |
| Total arch replacement | 10 [42] | 14 [58] | 1.40 (0.57, 3.44) | 0.463 |
| Duration of operation [min] | 298 ± 64 | 297 ± 78 | 1.00 (1.00, 1.00) | 0.945 |
| CPB time [min] | 172 ± 50 | 172 ± 58 | 1.00 (1.00, 1.01) | 0.987 |
| Cross-clamp time [min] | 96 ± 34 | 99 ± 32 | 1.00 (0.99, 1.01) | 0.620 |
| Circulatory arrest time [min] | 37 ± 18 | 40 ± 21 | 1.01 (0.99, 1.03) | 0.395 |
| Cerebral perfusion time [min] | 32 ± 21 | 37 ± 22 | 1.01 (0.99, 1.03) | 0.228 |
| Reperfusion time [min] | 61 ± 23 | 56 ± 20 | 1.01 (0.99, 1.03) | 0.282 |
| Hypothermia: | ||||
| deep ≤ 20°C | 11 [58] | 8 [42] | reference | |
| moderate 20.1–28°C | 61 [48] | 66 [52] | 1.49 (0.56, 3.94) | 0.425 |
| mild 28.1–34°C | 5 [56] | 4 [44] | 1.10 (0.22, 5.45) | 0.907 |
| Thiopental (ref. yes) | 70 [46] | 82 [54] | 1.30 (0.67, 2.52) | 0.432 |
| Cortisone (ref. no) | 26 [41] | 37 [59] | 1.23 (0.67, 2.25) | 0.500 |
| RBC [units] | 2.7 ± 2.0 | 3.1 ± 2.1 | 1.08 (0.94, 1.24) | 0.287 |
| FFP [units] | 6.1 ± 3.3 | 6.7 ± 3.9 | 1.05 (0.97, 1.14) | 0.217 |
| Platelets [units] | 2.4 ± 0.9 | 2.5 ± 1.0 | 1.06 (0.78, 1.43) | 0.713 |
| PCC [units] | 3658 ± 1834 | 3645 ± 1813 | 1.00 (1.00, 1.00) | 0.959 |
ARD: acute respiratory dysfunction; Cortisone: e.g. prednisolone, dexamethasone; CPB time: cardiopulmonary bypass time; FFP: fresh frozen plasma; PCC: prothrombin complex concentrate; RBC: red blood cells.
All data are presented as the mean ± standard deviation or number [%]. *: p < 0.05; p-value: logistic regression. Odds ratio (OR) and 95% confidence interval (95% CI).