Table 4 Capillary blood during strict head-down tilt bed rest with or without CO2 exposure. Data are means ± SD.
From: Bone metabolism during strict head-down tilt bed rest and exposure to elevated levels of ambient CO2
Control Pre (n = 8) | Control Post 60 Days (n = 8) | CO2 Pre (n = 11) | CO2 Post 30 Days (n = 11) | Study Effect (CO2 vs Control) | BR Effect (Pre vs BR) | Interaction Effect (StudyxBR) | |
|---|---|---|---|---|---|---|---|
pH | 7.43 ± 0.03 | 7.41 ± 0.02b | 7.42 ± 0.02 | 7.44 ± 0.02a | ns | ns | <0.01 |
pO2 (mmHg) | 76.5 ± 4.3 | 82.8 ± 13.0 | 75.8 ± 6.3 | 75.3 ± 7.5 | ns | ns | ns |
pCO2 (mmHg) | 39.5 ± 5.0 | 41.3 ± 3.4a | 41.0 ± 3.2 | 43.4 ± 4.2a | ns | <0.01 | ns |
HCO3 (mmol/L) | 25.3 ± 2.3 | 25.7 ± 1.0b | 26.3 ± 2.3 | 29.1 ± 2.7a | <0.05 | <0.001 | <0.01 |
Anion gap (mmol/L) | 10.2 ± 1.5 | 7.4 ± 1.7ab | 10.3 ± 1.3 | 10.9 ± 1.8 | <0.001 | ns | <0.05 |
