What are the labs done to see DI?

24 hour urine collection (determining urine volume) Serum electrolytes, glucose and uric acid Urinary specific gravity (DI <1.005) Plasma osmolality (DI >287 mOsm/kg) urinary osmolality (DI <200 mOsm/kg) plasma ADH (not very useful since ADH has a low half-life) Gold standard test is dehydration test