Acid–Base and Electrolytes
Acid–base evaluation and biochemical corrections in critically ill patients.
🧪 Corrected Anion Gap
Δ/Δ (Delta–Delta)
🧂 Corrected Electrolytes
Corrected Sodium
Corrected Calcium
Table 2: Expected Compensation in Acid–Base Disorders
| Metabolic Acidosis | |
|---|---|
| For every ↓ [HCO₃⁻] of 1 mEq/L (from 25 mEq/L), pCO₂ should ↓ 0.85–1.2 mmHg (from 40 mmHg). | |
| Metabolic Alkalosis | |
| For every ↑ [HCO₃⁻] of 1 mEq/L (from 25 mEq/L), pCO₂ should ↑ 0.7 mmHg (from 40 mmHg). | |
| Respiratory Acidosis | |
| For every ↑ pCO₂ of 10 mmHg (from 40 mmHg), [HCO₃⁻] ↑ 1 mEq/L if acute, or 3 mEq/L if chronic. | |
| Respiratory Alkalosis | |
| For every ↓ pCO₂ of 10 mmHg (from 40 mmHg), [HCO₃⁻] ↓ 2–2.5 mEq/L if acute, or 5 mEq/L if chronic. |