Bartter Syndrome Type 1 Presenting as Nephrogenic Diabetes Insipidus

Table 1

Laboratory investigation at onset and during follow-up.

Age (months)	12	13	15	18	24
		(DDAVP)
Plasma
Na (mEq/L)	175	150	140	142	138
K (mEq/L)	4	3.9	3.8	3.3	3.3
HCO3	24	25	26	27	27
BE	−1	−1	0	−1	2
Urine
Caur/Creatur	0.8	0.6	0.4	0.7	0.5
Osmur (mOsmol/kg)		140 (pre); 150 (post)