Thyroid Function Tests Flashcards
1
Q
where is TSH (thyroid stimulating hormone) produced
A
anterior pituitary
2
Q
does the thyroid produce mainly T3 or T4?
A
T4
85% of T3 is made from T4
3
Q
most T3/T4 in plasma is bound to what protein?
A
TBG
4
Q
out of the following, which would you test for in hyper/hypothyroidism and what result will you get:
T3
T4
TSH
A
hyperthyroidism:
TSH = Low
T3/4 = high
hypothyroidism:
TSH = High
T4 = LOW
5
Q
What is sick euthyroidism?
what happens to the following TFT results:
TSH
T3
T4
A
In any systemic illness - the TFT’s can become deranged so repeat the test after recovery
all LOW
6
Q
Which thyroid antibody is raised in autoimmune thyroid disease?
in which conditions will it be raised?
A
Anti-TPO ( antithyroid peroxidase)
Hashimoto’s and Graves’ Disease
