Reset Osmostat: A Challenging Case of Hyponatremia

Table 2

Result of the water load test.

Time	0 hr	2 hr	4 hr	12 hr
Serum osmolality (mOsm/kg)	250	243	248	253
Urine osmolality (mOsm/kg)	630	396	184	485
Urine Na (mmol/L)	83	58	32	77
Serum Na (mmol/L)	125	124	124	126