Table 1.
Physiological parameters
| Measured Oxygen Saturation at SSS |
||||
|---|---|---|---|---|
| Physiological Parameters | Group | 30–100% | 15–30% | 0–15% |
| Arterial pH | HYP | 7.28 ± 0.11 | 7.27 ± 0.8 | 7.18 ± 0.15 |
| UCAO | 7.37 ± 0.07 | 7.27 ± 0.2 | 7.22 ± 0.13 | |
| BCAO | 7.34 ± 0.11 | 7.38 ± 0.1 | 7.22 ± 0.08 | |
| Arterial Pco2, mmHg | HYP | 50.5 ± 8.4 | 49.8 ± 13.1 | 53.4 ± 14.6 |
| UCAO | 44.5 ± 5.8 | 43.5 ± 6.5 | 39.8 ± 6.9 | |
| BCAO | 47.0 ± 5.1 | 48.4 ± 3.9 | 45.9 ± 6.7 | |
| Hb concentration, g/dl | HYP | 7.6 ± 1.7 | 8.0 ± 1.2 | 7.6 ± 0.9 |
| UCAO | 8.4 ± 1.1 | 7.7 ± 1.5 | 8.7 ± 1.1 | |
| BCAO | 7.9 ± 1.2 | 8.1 ± 1.2 | 7.8 ± 0.8 | |
| MAP, mmHg | HYP | 74.4 ± 10.2 | 68.5 ± 7.6 | 67.1 ± 4.2 |
| UCAO | 86.0 ± 10.1 | 75.6 ± 13.6 | 60.1 ± 23.0 | |
| BCAO | 94.7 ± 19.6 | 94.0 ± 15.0 | 65.3 ± 27.4 | |
Values are means ± SD. SSS, superior sagittal sinus. Shown are arterial pH, arterial Pco2, arterial hemoglobin concentration, and mean arterial pressure (MAP) as functions of superior sagittal sinus oxygen saturation in groups with hypoxia alone (HYP), unilateral carotid artery occlusion (UCAO) followed by hypoxia, and bilateral carotid artery occlusion (BCAO) followed by hypoxia.