N | pH | p Value | Pco2 (kPa) | p Value | |
Peripheral venous blood | |||||
All patients | 103 | 0.002 (0.027) | −0.040 (0.517) | ||
Group 1 | 31 | 0.002 (0.022) | −0.032 (0.521) | ||
Group 2 | 49 | 0.001 (0.027) | 0.45 (NS) | −0.030 (0.495) | 0.81 (NS) |
Group 3 | 23 | 0.005 (0.033) | −0.071 (0.572) | ||
Central venous blood | |||||
All patients | 73 | 0.011 (0.023) | −0.176 (0.354) | ||
Group 1 | 9 | 0.004 (0.009) | −0.137 (0.283) | ||
Group 2 | 44 | 0.010 (0.024) | 0.03 (S) | −0.164 (0.373) | 0.41 (NS) |
Group 3 | 20 | 0.016 (0.022) | −0.220 (0.338) | ||
Mixed venous blood | |||||
All patients | 18 | −0.005 (0.021) | 0.055 (0.403) | ||
Group 1 | 0 | ||||
Group 2 | 9 | −0.003 (0.020) | 0.41 (NS) | 0.036 (0.389) | 0.71 (NS) |
Group 3 | 9 | −0.007 (0.022) | 0.074 (0.437) |
NS, non-significant; S, significant; Pco2, carbon dioxide tension.
The groups were compared using one-sided ANOVA.