Table 1. Fetal blood parameters before and after 10 min umbilical cord occlusion.
| Occlusion | Post occlusion | |||||
|---|---|---|---|---|---|---|
| Control −30 min | +5 min | +10 min | +40 min | +70 min | +250 min | |
| MAP (mmHg) | 33.5 ± 1.4 | 44.8 ± 5.5* | 30.3 ± 2.6 | 39.2 ± 1.7 | 37.2 ± 2.4 | 35.4 ± 3.8 |
| HR (beats min−1) | 158.5 ± 3.7 | 107.8 ± 13.9* | 128.7 ± 34.1 | 179.7 ± 18.0 | 178.9 ± 14.6 | 136.2 ± 10.6 |
| pH | 7.35 ± 0.02 | 7.02 ± 0.09* | 6.96 ± 0.09* | 7.21 ± 0.01* | 7.27 ± 0.01* | 7.36 ± 0.01 |
| PaCO2 (mmHg) | 48.1 ± 1.7 | 91.9 ± 12.0* | 94.2 ± 10.8* | 46.1 ± 2.7 | 43.3 ± 2.7 | 45.7 ± 1.5 |
| PaO2 (mmHg) | 21.5 ± 2.3 | 12.1 ± 1.9* | 11.7 ± 2.1* | 23.3 ± 3.0 | 23.9 ± 2.6 | 22.3 ± 1.5 |
| SaO2 (%) | 57.8 ± 6.8 | 14.5 ± 7.9* | 13.1 ± 6.1* | 55.2 ± 9.3 | 62.4 ± 7.8 | 63.9 ± 5.4 |
Fetal arterial pH, arterial partial pressure of CO2 (PaCO2), arterial partial pressure of O2 (PaO2), arterial O2 saturation (SaO2) and mean arterial pressure (MAP), heart rate (HR), pre (−30 min), during (+5 and +10 min) and after (+40, +70 and +250 min) the first 10 min UCO of the experimental protocol (see text). Data presented as mean ±s.e.m.
*
P < 0.05, significant difference from the pre-occlusion control value.