Which of the following statements about Diabetes Insipidus is true -
In diabetes insipidus, urine is not maximally concentrated (osmolality below 600 mOsm/kg) in the presence of increased plasma osmolality (greater than 300 mOsm/kg). The diagnosis can be confirmed or refuted by random simultaeous samples of blood and urine, but more often a dynamic test like water deprivation test is required. Reference : page 794 Davidson's Principles and practice of Medicine 22nd edition
Urine osmolality should be > 300 mosm\/L
Plasma osmolality should be < 280 mmol\/L
Water deprivation test is required
Plasma osmolality should be > 300 mosm\/L prior to H2O Deprivation test
Endocrinology