Rapid Reference
Keep this open while doing UWorld blocks or CCS practice.
Basic Metabolic Panel
| Test | Normal |
|---|
| Na⁺ | 135–145 mEq/L |
| K⁺ | 3.5–5.0 mEq/L |
| Cl⁻ | 98–106 mEq/L |
| HCO₃⁻ | 22–28 mEq/L |
| BUN | 7–20 mg/dL |
| Creatinine | 0.6–1.3 mg/dL |
| Glucose fasting | 70–100 mg/dL |
| Calcium | 8.5–10.5 mg/dL |
| Magnesium | 1.7–2.2 mg/dL |
| Phosphorus | 2.5–4.5 mg/dL |
CBC
| Test | Normal |
|---|
| WBC | 4,000–11,000/µL |
| Hemoglobin | Men 13.5–17.5 g/dL; Women 12.0–15.5 g/dL |
| Hematocrit | Men 41–50%; Women 36–44% |
| Platelets | 150,000–450,000/µL |
| MCV | 80–100 fL |
Liver, Coagulation, ABG
| Test | Normal |
|---|
| AST | 10–40 U/L |
| ALT | 7–56 U/L |
| Alkaline phosphatase | 40–130 U/L |
| Total bilirubin | 0.2–1.2 mg/dL |
| Albumin | 3.5–5.0 g/dL |
| PT/INR | 11–13 sec / 0.8–1.2 |
| aPTT | 25–35 sec |
| pH | 7.35–7.45 |
| PaCO₂ | 35–45 mmHg |
| PaO₂ | 80–100 mmHg |
Equations
- Anion gap: Na − (Cl + HCO₃); normal 8–12.
- Winter’s formula: expected PaCO₂ = 1.5 × HCO₃ + 8 ± 2.
- Corrected sodium: measured Na + 1.6 × [(glucose − 100) / 100].
- Corrected calcium: measured Ca + 0.8 × (4 − albumin).
- Serum osmolality: 2 × Na + glucose/18 + BUN/2.8.
- FENa: [(urine Na × plasma Cr) / (plasma Na × urine Cr)] × 100.