Table 2.
Physiological variables measured at different time points
| Variable (unit) | Baselinea | Skin incision | CPB start | SCP start | SCP stop | Aorta open | CPB stop | Surgery end |
|---|---|---|---|---|---|---|---|---|
| SctO2 (%) | 70.3 ± 3.5 | 67.6 ± 3.5 | 58.6 ± 3.5 | 79.6 ± 4.0 | 71.8 ± 2.5 | 51.8 ± 2.3 | 59.0 ± 2.8 | 61.3 ± 6.0 |
| SstO2 (%) | 58.8 ± 5.8 | 55.1 ± 6.2 | 46.4 ± 6.7 | 39.6 ± 5.2 | 50.5 ± 4.9 | 75.8 ± 4.4 | 70.5 ± 2.3 | 69.5 ± 6.2 |
| SaO2 (%) | 99.6 ± 0.4 | 99.6 ± 0.4 | 99.6 ± 0.4 | 99.8 ± 0.2 | 99.9 ± 0.1 | 99.6 ± 0.4 | 99.5 ± 0.4 | 99.4 ± 0.6 |
| SmvO2 (%) | 70.7 ± 5.7 | 68.4 ± 5.2 | 56.4 ± 5.0 | 78.3 ± 4.0 | 74.4 ± 3.4 | 58.5 ± 7.8 | 60.3 ± 5.7 | 62.3 ± 9.1 |
| MAP-arm (mmHg) | 65.9 ± 3.8 | 63.4 ± 3.0 | 56.4 ± 3.4 | 57.6 ± 4.5 | 54.1 ± 2.5 | 57.3 ± 4.1 | 60.2 ± 3.9 | 59.9 ± 5.1 |
| MAP-leg (mmHg) | 44.2 ± 8.5 | 42.4 ± 7.7 | 38.7 ± 6.7 | 22.1 ± 4.8 | 28.1 ± 9.5 | 45.2 ± 9.5 | 48.5 ± 9.6 | 50.7 ± 10.7 |
| PaCO2 (mmHg) | 45.3 ± 3.8 | 42.4 ± 3.4 | 38.9 ± 2.6 | 31.2 ± 1.8 | 29.7 ± 1.2 | 31.6 ± 1.5 | 35.1 ± 3.5 | 37.9 ± 3.1 |
| Hematocrit (%) | 38.3 ± 2.1 | 38.0 ± 2.2 | 37.2 ± 2.1 | 21.0 ± 1.8 | 20.6 ± 2.7 | 25.1 ± 1.8 | 28.7 ± 1.6 | 34.3 ± 1.5 |
| Temperature (°C) | 37.0 ± 0.5 | 36.6 ± 0.4 | 36.2 ± 0.4 | 20.1 ± 1.2 | 19.6 ± 1.2 | 28.6 ± 2.6 | 36.5 ± 0.5 | 36.1 ± 0.5 |
| Lactate (mmol/l) | 1.3 ± 0.2 | 1.3 ± 0.3 | 1.6 ± 0.3 | 2.5 ± 0.3 | 3.7 ± 0.4 | 3.1 ± 0.3 | 2.6 ± 0.3 | 2.5 ± 0.4 |
awith patient sedated using small dose of fentanyl and midazolam and spontaneously breathing room air
CPB = cardiopulmonary bypass; SCP = selective cerebral perfusion; SctO2 = cerebral tissue oxygen saturation; SstO2 = somatic tissue oxygen saturation; SaO2 = arterial blood oxygen saturation; SmvO2 = mixed venous blood oxygen saturation; MAP-arm = mean arterial pressure measured on arm; MAP-leg = mean arterial pressure measured on leg; PaCO2 = arterial blood carbon dioxide partial pressure