Pitfall in the Diagnosis of Diabetes Insipidus and Pregnancy

Table 2

Pitressin and DDAVP challenge for Case .

	Time	Urine output	Urine specific gravity	Urine osm [mOsm/kg]	Serum osm [mOsm/kg]	Sodium [mmol/L]
5 units of SQ Pitressin	1400 h	500 mL		116	328
	1600 h	600 mL		87	301
	1700 h	600 mL	1.005			141
	1800 h	150 mL	1.005		301	144
	1900 h	350 mL
10 µg of intranasal DDAVP	2100 h	700 mL
	2200 h					135
	0000 h
	0200 h	75 mL
	0400 h	60 mL
	0600 h	60 mL	1.020			131