Diabetes

Question 1

investigate diabetes insipidus

best test?

Answer 1

water deprivation test

then desmopressin given

Question 2

what does desmopressin do in cranial DI

Answer 2

rapid conc of urine

>50% rise in urine osmolality

Question 3

what are the two causes of DI

management of the two causes?

Answer 3

cranial or nephrogenic

cranial : desmopressin intranasal

nephrogenic : thiazide diuretic

Question 4

SIADH

would your serum be dilute or concentrated?

Answer 4

soaked inside

v v v dilute

Question 5

in SIADH the serum Na+ is high and the urine Na+ is low

Answer 5

false

urine sodium goes UP

Question 6

low sodium reflects excess water

T/F?

Answer 6

true as sodium is a measure of fluid status

Question 7

hypovolaemic hyponatraemia?
what would be urinary soidum???

how do you manage???

Answer 7

DEHYDRATED
low volume of fluid
why?
diarrhoea

urinary sodium LOW

IV fluids

Question 8

euvolaemic hyponatraemia

management

Answer 8

siadh
hypothyroidism
adrenal insufficiency

fluid restrict

Question 9

central pontine myelionylysis

what causes this?

Answer 9

if you give fluid too fast in a severe hyponatraemia

so give hypertonic saline SLOWLY

Question 10

what causes hypervolaemic hyponatraemia?

Answer 10

liver failure
renal failure
heart failure