pituitary physiology Flashcards
1
Q
what kind of test is done if there is too much hormone produced?
A
a suppression test
2
Q
what kind of test is done if there it too little hormone produced?
A
a stimulation test
3
Q
what are some exampled of stimulation tests?
A
synthetic ACTH test
insulin stress test/prolonged glucagon test
water deprivation test
4
Q
what is the result of a synthetic ACTH test?
A
normal= cortisol rises by 150 and reaches 500
5
Q
what is the result of an insulin stress test/prolonged glucagon test?
A
Cortisol and GH response every 30 min for 2-3 hrs
Normal cortisol >500
Normal GH >7ug/l
6
Q
what is the result of a water deprivation test?
A
Check serum and urine osmolalities for 8h, and then 4h after giving IM DDAVP.
If Ur/Serum Osmol ratio >1.9 then it is normal, otherwise DI
