Table 1.
Selected laboratory values at the time of nephrology evaluation
| Variable | Value | Reference |
|---|---|---|
| Blood urea nitrogen (mg/dL) | 18 | 7–22 |
| Creatinine (mg/dL) | 1.7 | 0.6–1.3 |
| Sodium (mEq/L) | 136 | 135–148 |
| Total CO2 (mEq/L) | 24 | 21–31 |
| Calcium (mg/dL) | 9.2 | 8.4–10.5 |
| Phosphorous (mg/dL) | 4.1 | 2.5–4.5 |
| Uric acid (mg/dL) | 4.2 | 3.7–8.6 |
| Albumin (g/dL) | 3.8 | 3.5–5.3 |
| Ammonia (μ/dL) | 100 | 27–102 |
| Hemoglobin (g/dL) | 11.3 | 13.9–16.3 |
| Platelets (cells/mm3) | 162,000 | 150,000–350,000 |
| Urinalysis | ||
| pH | 5 | 4.6–8.0 |
| Protein | negative | negative |
| Red blood cells (per HPF) | 1 | 0–5 |
| White blood cells (per HPF) | 0 | 0–5 |
| Urine microalbumin/creatinine (mg/g) | 3.2 | 0.0–30.0 |
| 25-vitamin D (ng/mL) | 36.7 | 30–100 |
| Complement C3 (mg/dL) | 130 | 90–180 |
| Complement C4 (mg/dL) | 26 | 9–36 |
| Antinuclear antibody | Negative | Negative |
| Free plasma carnitine (μmol/L) | 12.6 | 22–66 |
| Total plasma carnitine (μmol/L) | 122.8 | 28–84 |
| Urine citrate* (μg/mg creatinine) | 12 | 12–96 |
| Urine methylcitrate* (μg/mg creatinine) | 105 | 0 |
*Semi-quantitative values derived from urine organic acid analysis. methylcitrate/citrate ratio is 8.75