Diabetes Insipidus Flashcards
1
Q
what is diabetes insipidus
A
a condition characterised by a deficiency of ADH (cranial DI) or an insensitivity to ADH (nephrogenic DI)
2
Q
what are the features of DI
A
polyuria
polydipsia
dehydration
symptoms of hypernatraemia
3
Q
what osmolalities would you see in DI
A
HIGH plasma osmolality
LOW urine osmolality
4
Q
what is the investigation of choice for DI
A
water deprivation test
5
Q
how do you manage cranial DI
A
MRI head test anterior pituitary function give DESMOPRESSIN (a synthetic analogue of ADH)
6
Q
how do you manage nephrogenic DI
A
treat the cause
if it persists try bendroflumethiazide
