Case Report
The Hyponatremic Hypertensive Syndrome in a Preterm Infant: A Case of Severe Hyponatremia with Neurological Sequels
Table 1
Laboratory values in plasma and urine, measured in the patient at readmission to the NICU.
| Laboratory measurement | Measured value | Normal values |
| Plasma | | | Sodium (mmol/L) | 101 | 136–146 | Potassium (mmol/L) | 3.0 | 3.4–6.0 | Chloride (mmol/L) | 70 | 99–108 | Magnesium (mmol/L) | 0.66 | 0.70–1.00 | Calcium, ionized (mmol/L) | 1.25 | 0.95–1.50 | Phosphate (mmol/L) | 1.26 | 1.25–2.10 | Glucose (mmol/L) | 6.4 | 3.6–5.6 | Osmolarity (mOsmol/kg) | 219 | 280–295 | Urea (mmol/L) | 3.4 | 3.0–7.5 | Creatinine (μmol/L) | 44 | 27–62 | pH (arterial blood) | 7.56 | 7.37–7.4 | pCO2 (mmHg) | 26 | 35–45 | Bicarbonate (mmol/L) | 22.9 | 22–28 | Base excess (mmol/L) | 1.0 | −3.0–3.0 | Lactate (mmol/L) | 3.6 | 0.0–2.2 | BNP (pmol/L) | 1228 | (Adult) <30–120 | Hb (mmol/L) | 8.4 | (Adult) 5.9–8.4 | Ht (mmol/L) | 0.34 | 0.41–0.50 | Erythrocytes (×1012/L) | 3.94 | 3.20–4.80 |
| Urine | | | Sodium (mmol/L) | <10 | Not available | Potassium (mmol/L) | 19 | Not available | Glucose (mmol/L) | 16.1 | Not available | Osmolarity (mOsmol/kg) | 129 | Not available | Protein (g/L) | >2.0 | Not available | Creatinine (mmol/L) | 1.5 | Not available | pH | 7.0 | 4.5–8.0 | Erythrocytes (per μL) | 60 | 0–10 |
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