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Arterial gas and electrolyte analysis.
| Day 1 | Day 3 | |
|---|---|---|
| Sodium (mEq/L) | 142 | 136 |
| Potassium (mEq/L) | 3.6 | 3.8 |
| Chlorine (mEq/L) | 107.9 | 106.8 |
| pH | 7.38 | 7.36 |
| PO2 (mmHg) | 58 | 67 |
| PCO2 (mmHg) | 29.2 | 35 |
| HCO3 (mEq/L) | 17.5 | 27 |
| Base excess | −8 | −1 |
| Oxygen saturation (%) | 90 | 96 |
| FiO2 (%) | 21 | 21 |
| PaFiO2 | 276 | 319 |
