Flashcards in hypothyroidism Deck (18)
hyperthyroidism following administration of iodine or iodide
reduction in thyroid hormone levels caused by ingestion of a large amount of iodine due to autoregulatory phenomenon that inhibits organification in the thyroid gland
does T4 or T3 have a longer half life?
T4 has a half life of ____, T3 is ____
7 days; 1 day
what is the primary binding protein of T3/T4?
thyroid binding globulin
factors that incr TBG? (2)
1. estrogen (pregnancy, BCP)
factors that decr TBG (2)
1. systemic illness
best test of thyroid fxn
thyroid dysfxn stemming from the thryroid
thyroid dysfxn stemming from the pit or the hypothalamus
if you suspect secondary hypothyrodism, is the TSH reliable?
no, it will be constantly low
what is the most common cause of hypothyroidism in iodine sufficient areas?
how to tx hypothyroidism
when is tx of hypothyroidism indicated?
when to recheck labs after starting levothyroxine?
1. 6 weeks later
2. switch meds
3. starts BCP
what happens to thyroid hormone during pregnancy?
needs for thyroid hormone increase
mental status changes, hypothermia, hyperglycemia, respiratory failure, hypotension, bradycardia