Four Japanese Patients with Congenital Nephrogenic Diabetes Insipidus due to the AVPR2 Mutations

Table 2

Results of the water deprivation test in Case 2.

Test time (hour)	Body weight (g)	Body weight loss (%)	Urine osmolality (mOsm/L)	Serum osmolality (mOsm/L)	Serum Na^+ (mEq/L)	ADH (pmol/L)
0	9.055		68	286	140	64.7
1	8.980	0.8	150
2	8.905	1.6	291
3	8.855	2.2	261
4	8.795	2.8	252
5	8.745	3.4	314	292	146	91.8
6			384
6.5	8.675	4.1	378	295	146	110.1

Vasopressin was subcutaneously injected. ADH, plasma antidiuretic hormone.