Table 1.
Ovine Physiologic Values with Development
| Physiologic Variable | Fetus | Newborn | Adult | Reference |
|---|---|---|---|---|
| PaO2 (Torr) | 25±1a | 70±10b | 100±5 | [70, 72–74] |
| [Hgb] (g·dl−1) | 10.1±0.7b (116) | 14.0±0.5a (161) | 8.7±0.3 | [70, 74, 75] |
| Arterial [HbO2] (%) | 70 to 80 | 80 to 100 | 100 | Many sources, see text |
| O2 Content (ml·dl−1) | 7.7±0.5a (59) | 15.7±1.2 (121) | 13±1.0 | [70, 74] |
| PaCO2 (Torr) | 44±2 (120) | 40±4 (114) | 35±2 | [70, 74] |
| pH | 7.36±0.01 (‡) | 7.38±0.01 (‡) | 7.40±0.01 (‡) | [70, 74] |
| Mean Arterial Blood Pressure (mmHg) | 46±2b (57) | 75±3 (94) | 80±4 | [70, 73] |
| Cerebral Blood Flow (ml·100g−1·min−1) | 100±20 | 100±20 | 100±20 | Many sources, see text |
| Cerebrovascular Resistance (mmHg·min−1·ml−1) | 0.40±0.04a (50) | 0.75±0.10 (94) | 0.80±.10 | Many sources, see text |
Values are mean ±SE of 5 or more in each group; Values in parentheses represent % of adult value;
‡
Because these are logarithmic functions, percent change is not an accurate or appropriate representation;
Significantly different from adult value:
a
P<0.001;
b
P<0.01