Table 1.
Patient and intraoperative details
| Parameter | no delirium | delirium | p value |
|---|---|---|---|
| Prevalence (n) | 32 (73% a) | 12 (27% a) | |
| Age (years) | 67 (10) | 75 (5) | 0.008 |
| Male gender (n) | 23 (72%) | 10 (83%) | 0.7 b |
| Weight (kg) | 80 (14) | 81 (19) | 0.94 |
| Height (cm) | 174 (10) | 171 (9) | 0.29 |
| Body surface area (m2) | 1.97 (0.2) | 1.95 (0.25) | 0.78 |
| Body mass index (kg/m2) | 26.4 (3.8) | 27.5 (5.7) | 0.45 |
| Chronic arterial hypertension (n) | 24 (75%) | 10 (83%) | 0.7 b |
| Intraoperative details | |||
| Duration of aortic cross-clamping (min) | 91.3 (37.8) | 97.6 (35.6) | 0.66 |
| Duration of surgery (min) | 275.0 (71.6) | 288.3 (57.3) | 0.57 |
| Hematocrit preop. (%) | 41.0 (3.8) | 41.8 (3.8) | 0.50 |
| Hematocrit postop. (%) | 30.5 (4.0) | 30.7 (2.5) | 0.88 |
| Delta hematocrit (%) | 10.5 (4.7) | 11.2 (3.9) | 0.66 |
| BIS | 41.4 (5.1) | 43.5 (4.9) | 0.23 |
| MAP bas (mmHg) | 63 (8.4) | 69 (15.1) | 0.11 |
| MAP abs (mmHg) | 61 (6.7) | 64 (5.8) | 0.19 |
| MAP rel (%) | 98 (16.1) | 96 (21.9) | 0.75 |
| HLM pump flow (l/min*m2) | 2.4 (0.29) | 2.3 (0.37) | 0.30 |
| Noradrenaline (μg/min*kg) | 0.11 (0.09) | 0.11 (0.11) | 0.96 |
| PaCO2 (mmHg) | 36.2 (3.7) | 35.4 (4.1) | 0.56 |
| Temperature (°C) | 34.5 (1.1) | 34 (1.0) | 0.05 |
Values are given as mean (±SD) of the averaged individual values
MAP = mean arterial blood pressure, HLM = heart-lung machine, BIS = bispectral index
a percentage of whole cohort, b Fisher’s exact test