Carbamazepine-induced hyponatremia following meningioma surgery: A case report

Table 1 Timeline of laboratory findings

Postoperative day	Laboratory findings
POD 1	Control cranial CT satisfactory (no laboratory values reported)
POD 2	Serum Na 131 mmol/L; K 3.6 mmol/L; creatinine 60 μmol/L; urea 19 mmol/L; glucose 86 mmol/L
POD 3	Serum Na 123 mmol/L
POD 5	Serum Na 126 mmol/L
POD 7	Serum Na 119 mmol/L
POD 8	Serum Na 129 mmol/L; serum osmolality 254 mOsm/kg; glucose 54 mmol/L; total protein 69 g/L; triglycerides 1.3 mmol/L; urea 22 mmol/L; creatinine 58 μmol/L; uric acid 150 μmol/L; urine osmolality 560 mOsm/kg; urine Na 68 mmol/L; urine K 28 mmol/L; urine specific gravity 1.020; morning cortisol 520 nmol/L; TSH 1.6 mIU/L; free T4 14 pmol/L
POD 10 (discharge)	Serum Na 132 mmol/L
POD 14	Serum Na 134 mmol/L
POD 19	Serum Na 136 mmol/L
3-month follow-up	Serum Na 136 mmol/L

POD: Postoperative day; CT: Computed tomography; TSH: Thyroid stimulating hormone.