Endocrinology 12 - Diabetes Insipidus Flashcards
1
Q
nephrogenic causes diabetes insipidus
A
lithium hypokalaemia hypercalcaemia intrinsic kidney disease genetic
2
Q
central causes diabetes insipidus x5 (1 common link)
A
brain:
tumour, injury, infection, surgery, radiotherapy, malformations
3
Q
5 presenting featuresof diabetes insipidus
A
hypernatraemia polyuria polydipsia dehydration postural drop
4
Q
3 tests for diabetes insipidus when supsected
A
urine osmolality (low) serum osmolality (high) water deprivation test
5
Q
describe the 3 outcomes of water deprivation test
A
8 hours urine concentrated (i.e. high osmolality) = psychogenic polydipsia
urine concentrates to high osmolality after desmopressin = central cause
doesn’t = nephrogenic
