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Two sets of arterial blood gas results, two hours apart, in a patient with severe type 2 respiratory failure and fluctuating PaCO2 levels.
| Initial | After 2 hours | |
|---|---|---|
| pH | 7.16 | 7.30 |
| PaCO2 (mm Hg) | 172 | 124 |
| [HCO3−] (mmol/L) | 59 | 59 |
| BE (mEq/L) | 19.1 | 23.5 |
| SBE (mEq/L) | 29.1 | 30.7 |
