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Flashcards in Thyroid Tests Deck (14)
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1

What is the FTI?

Free thyroxine index
Tells if abnormal amounts of T4 present because of abnormal amounts of thyroxine binding globulin

2

What is the most common thyroid test?

TSH

3

What is the best measure of active hormonal status?

Free T4/Free thyroxine

4

What can elevate total T4 levels?

Pregnancy
Estrogen replacement
Birth control pills

5

Why is free T3 less reliable?

Assay conditions can affect the result

6

What is the most commonly used test for cancer surveillance?

Thyroglobulin

7

What are things that can cause thyroglobulin levels to rise?

Graves
Thyroiditis
Carcinoma

8

What antibodies are most commonly present in Hashimoto's thyroiditis?

Thyroid peroxidase antibodies

9

If you have high thyroglobulin antibody levels and have Graves' disease, what is likely to happen?

Eventually become hypothyroid

10

What is most commonly seen antibody in Graves disease?

TSH receptor antibody

11

What is TSH receptor stimulating antibodies also known as?

TSH stimulating antibodies (TSAb)
Thyroid stimulating Ig (TSI)

12

When is a radioactive thryoid test done?

Distinguishes between:
Graves
Toxic multinodular goiter
Thyroiditis

13

What would Graves' disease look like with a Radioactive Thyroid test? Hashimotos?

Graves: uptake elevated
Hashimotos: Patchy

14

What do cancerous nodules often look like with a thyroid test?

Cold