Table 1.
Physiological Parameters Before Betamethasone Administration
| pH (7.28–7.38) |
Pco2 (mmHg) (45–55) |
Po2 (mmHg) (20–30) |
Hb (mg/dL) (7.0–9.0) |
O2% (55–85) |
||
|---|---|---|---|---|---|---|
| 170 µg/kg BMp | Maternal | 7.47±0.01 | 32.5±0.9 | 122.2±1.8 | 9.1±0.7 | 98.6±0.4 |
| Fetal | 7.34±0.01 | 47.5±1.0 | 25.8±1.4 | 8.4±0.5 | 81.3±3.7 | |
| 110 µg/kg BMp | Maternal | 7.46±0.02 | 37.2±0.9 | 112.4±3.0 | 9.3±0.5 | 98.4±0.8 |
| Fetal | 7.36±0.01 | 46.2±1.3 | 26.1±1.2 | 7.5±0.3 | 81.4±1.5 | |
| 170 µg/kg BMp/a | Maternal | 7.44±0.03 | 39.4±3.9 | 111.3±4.4 | 8.9±0.3 | 98.8±0.6 |
| Fetal | 7.34±0.02 | 50.2±1.6 | 27.7±2.9 | 8.5±0.6 | 78.9±5.6 |
BMp, betamethasone phosphate; BMp/a, betamethasone phosphate acetate.
Maternal and fetal blood gases were measured in the carotid artery. The physiologic ranges of the fetal values are in parentheses. Data are expressed as mean±standard error of the mean.