Table 1. Electrolytes and renal function test reports.

Normal reference range in neonates: serum sodium: 135-145 mEq/L; serum potassium: 3.5-5.2 mEq/L; serum urea: 5-15 mg/dL; serum creatinine: 0.54-1 mg/dL

Day of life		Serum sodium (mEq/L)	Serum potassium (mEq/L)	Serum urea (mg/dL)	Serum creatinine (mg/dL)
Day 22	Morning	117	6.9	98	1.7
	Evening	124	6.5	81	1.4
Day 23	Morning	120	6.5	65	1.1
	Evening	122	6	42	1
Day 24	Morning	121	5.8	26	0.7
	Evening	122	5.5	-	-
Day 25		121	5.6	7	0.3
Day 27		138	4.6	-	-
Day 28		140	4.2	-	-
Day 32 (on discharge)		142	4.2	14	0.5
On follow-up		139	4	10	0.3