Management Challenges in a Child with Chronic Hyponatremia: Use of V2 Receptor Antagonist

Table 1

Serum and urine chemistry at initial presentation.

Lab parameter	Value
Serum sodium (mEq/L); (134–145)	123
Serum potassium (mEq/L)	5.2
Serum chloride (mEq/L)	90
Serum bicarbonate	23
Anion gap	8
Blood urea nitrogen	6
Serum creatinine	0.4
Serum glucose (mg/dL)	105
Serum calcium (mg/dL)	9.2
Uric acid (mg/dL); (2.6–6.0)	1.6
Plasma renin activity (ng/mL/hr)	<10
Aldosterone (ng/dL)	11
Serum osmolality (mOsm/Kg); (280–300)	264
Urine osmolality (mOsm/Kg); (300–900)	614
Urine Na (mEq/L)	122
Arginine vasopressin (pg/mL); (<7.0)	7.8