Table 1.
Effects of hypoxia on blood gas variables during sleep in lambs
| Quiet sleep | Active sleep | |||
|---|---|---|---|---|
| Normoxia | Hypoxia | Normoxia | Hypoxia | |
| Pa,O2 (mmHg) | 99 ± 3 | 59 ± 3* | 96 ± 3 | 48 ± 2*† |
| Pa,CO2 (mmHg) | 41 ± 2 | 40 ± 1 | 42 ± 1 | 43 ± 1† |
| pH | 7.41 ± 0.01 | 7.41 ± 0.01 | 7.40 ± 0.01 | 7.39 ± 0.01 |
| Base excess (mmol 1−1) | 1.1 ± 0.6 | 0.9 ± 0.8 | 0.9 ± 0.6 | 0.9 ± 0.6 |
Values are means ±s.e.m., n = 9 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, QS vs. AS.