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A member asked:

My doctor only did a blood test for tsh i asked for t3 (liothyronine) t4 to but she said she will order more test if something is abnormal?

A doctor has provided 1 answer
Dr. Robert Killian answered

Specializes in General Practice

Medicine and Billing: That is how it is done. The TSH is the first line test for screening and then further investigation happens if abnormal. Many people with under active thyroid can have a normal t3 (liothyronine) and T4 and still be under active.

Answered 1/15/2015

4.3k views

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What is the reason of low body temperature. How i can treat it, what type of blood test to do, my tsh, t3, (liothyronine) T4 results are normal.

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Doc is testing tsh, t3 (liothyronine), (liothyronine) t4, free t3 (liothyronine), (liothyronine) free t4, and reverse t3 (liothyronine). Are there other tests that should be done at the same time as these tests for thyroid?

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What tests are decisive for hypothyroidism apart from TSH and free T4? My doc ordered total T3 (liothyronine) too. Or he should have ordered free T3 (liothyronine)?

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Routine blood worked showed 0.06 fasting TSH. When is the best time of day for a accurate T3 (liothyronine) and free T4 test. Not diagnosed yet. ?

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