In psychogenic polydipsia, serum sodium is low, and after water deprivation test, urine osmolality is increased.
Urine osmolality does not increase with vasopressin injection
In nephrogenic diabetes insipidus, serum sodium is high and there is no change/mild increase in urine osmolality after water deprivation
yotsubatoThis patient does not undergo a water deprivation test +32019-06-10T11:08:20Z
niboonshCompulsive water drinking or psychogenic polydipsia is now increasingly seen in psychiatric populations. Effects of increased water intake can lead to hyponatremia causing symptoms of nausea, vomiting, seizures, delirium and can even be life threatening if not recognized and managed early.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5579464/+22019-06-16T15:51:03Z
missi19998Just wondering why it in not resistance to ADH action of vasopressin+2019-06-23T19:42:28Z
amarousisbecause he would be hypernatremic with no ADH. can't resorb any water+12019-06-30T22:10:04Z
to snoo-finity ... and beyond!
submitted by masonkingcobra(55), 2019-05-23T22:44:19Z
In psychogenic polydipsia, serum sodium is low, and after water deprivation test, urine osmolality is increased. Urine osmolality does not increase with vasopressin injection
In nephrogenic diabetes insipidus, serum sodium is high and there is no change/mild increase in urine osmolality after water deprivation