Thyroid dz Flashcards Preview

Medicine > Thyroid dz > Flashcards

Flashcards in Thyroid dz Deck (29):
1

when would you use thyroid scan and uptake?

hyperthyroidism

2

what is normal thyroid uptake at 4-6 hours?

5-15%

3

what is the normal thyroid uptake at 24 hours?

15-25%

4

what does the scan help you determine?

hetero or homogenous distribution
-determined by cold/hot areas of uptake on scan

5

what supplements can influence synthroid levels?

calcium and iron

6

what is a common side effect of synthroid?

CP
palpitations

7

what comorbidities can impact synthroid absorption?

malabsorption
GI conditions

8

what should you do when giving synthroid to an elderly person?

1/2 of a 25 mcg tablet twice a day
go slowly and make small dose changes
(risk of precipitating a cardiac event)

9

how often should you check TSH and free T4 levels?

every 6 weeks

10

what is armour thyroid?

pork thyroid extract
measured in grains

11

what is thyrotoxicosis?

hyperthyroidism

12

what is the dosing frequency of methimazole?

once daily

13

what is a significant side effect of antithyroid drugs?

agranulocytosis

14

which anti thyroid is the DOC during pregnancy?

PTU

15

which antithyroid drug inhibits conversion of T4-T3?

PTU (also has risk of hepatic failure)

16

which is the DOC during a thyroid storm?

PTU

17

what drug might you also consider if sxs don't resolve quickly?

beta-blocker
(one month taper is common)
-reduces some peripheral conversion of T4-T3

18

what condition can worsen with RAI especially in smokers?

opthalmopathy

19

what has to happen before giving RAI?

stop antithyroid drugs for 7 dys before RAI

20

what is a typical presentation in the elderly of hyperthyroidism?

apathetic
AMS

21

what are the risk factors for thyroid nodules?

age
female > male
hx of head and neck irradiation
family hx of thyroid cancer
iodine deficiency

22

what factors increase the risk of malignancy?

pt 70
male > female
hx of radiation
family hx of thyroid cancer
environmental toxins

23

when is a fine needle aspiration indicated?

palpable nodules and >10mm or with risk factors for malignancy

24

which type of thyroid nodule is the most common and has the best cure rate?

papillary

25

what type of thyroid nodule has the worst prognosis?

anaplastic (no differentiation)

26

which type of thyroid tumor is associated with MEN (multiple endocrine neoplasias)

medullary carcinoma

27

which alpha blockers are used during pheo surgery?

phenoxybenzamine
doxazosin

28

which calcium channel blockers are used during pheo surgery and other HTN crisis?

nifedipine ER
nicardipine ER

29

which beta blockers are used to manage tachycardia and arrhythmias during pheo surgery?

metoprolol

Decks in Medicine Class (146):