Table 2.
Effects of hypoxia on respiratory variables during sleep in lambs
| Quiet sleep | Active sleep | |||
|---|---|---|---|---|
| Normoxia | Hypoxia | Normoxia | Hypoxia | |
| Pa,O2 (mmHg) | 93 ± 3 | 53 ± 2 * | 93 ± 2 | 46 ± 2 *† |
| Pa,CO2 (mmHg) | 42 ± 2 | 40 ± 2 | 42 ± 1 | 43 ± 2 |
| pH | 7.40 ± 0.01 | 7.41 ± 0.01 | 7.40 ± 0.01 | 7.39 ± 0.02 |
| Base excess (mmol l−1) | 1 ± 1 | 1 ± 1 | 1 ± 1 | 1 ± 1 |
Values are means ±s.e.m., n = 6 lambs. Pa,CO2, arterial partial pressure of carbon dioxide; Pa,O2, arterial partial pressure of oxygen.
*
P < 0.05, normoxia vs. hypoxia
†
P < 0.05, quiet sleep vs. active sleep.