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 |
|
|
