Table 3.
Arterial blood gas values for anaesthetized, vagotomized control and neonatal hypoxia rats under baseline conditions (FIO2= 0.50) and during the three levels of hypoxia at which phrenic activity was measured
| Level of hypoxia | ||||
|---|---|---|---|---|
| Group | Baseline | 60 Torr | 50 Torr | 40 Torr |
| PaO2 (Torr) | ||||
| Male | ||||
| Control | 260 ± 6 | 61 ± 1 | 50 ± 1 | 40 ± 0 |
| Neonatal hypoxia | 235 ± 7* | 61 ± 1 | 50 ± 1 | 40 ± 1 |
| Female | ||||
| Control | 241 ± 9 | 60 ± 0 | 48 ± 1 | 41 ± 1 |
| Neonatal hypoxia | 232 ± 7 | 61 ± 1 | 50 ± 1 | 41 ± 0 |
| PaCO2 (Torr) | ||||
| Male | ||||
| Control | 45.9 ± 0.8 | 45.9 ± 0.7 | 45.7 ± 0.8 | 46.0 ± 1.1 |
| Neonatal hypoxia | 46.2 ± 0.9 | 45.7 ± 0.8 | 45.6 ± 0.8 | 46.0 ± 1.0 |
| Female | ||||
| Control | 46.2 ± 1.7 | 46.2 ± 1.3 | 45.2 ± 1.6 | 46.1 ± 1.9 |
| Neonatal hypoxia | 46.6 ± 1.2 | 46.4 ± 1.5 | 45.4 ± 1.2 | 45.8 ± 1.1 |
Values are means ±s.e.m. for control (n = 11 male, 5 female) and neonatal hypoxia (n = 11 male, 4 female) rats.
*
P < 0.05 versus control at the same FIO2.