Acid-base analyses across all time points (arterialised values)
| Visit 1 | Visit 2 | Visit 3 | P value | |
| pH | 7.41±0.03 | 7.43±0.03 | 7.44±0.03 | 0.19 |
| pCO2 | 39.2±4.3 | 38.5±5.8 | 37±4.7 | 0.30 |
| HCO− 3 | 24.9±2.6 | 24.8±2.3 | 24.4±1.9 | 0.72 |
Data are means±SD. Hypothesis testing used a Kruskal-Wallis test.