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Unit Code 800095:
T4 (Thyroxine), Total Only, Serum

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Useful For

Monitoring treatment with synthetic hormones (synthetic T3 will

cause a low total T4)

 

Monitoring treatment of hyperthyroidism with thiouracil and other

antithyroid drugs

 

Total T4 levels offer a good index of thyroid function when the

TBG is normal and nonthyroidol illness is not present.

Testing Guides and Forms

• Thyroid Function Algorithm 

Method Name

Immunoenzymatic Assay

Reporting Name

T4 (Thyroxine), Total Only, S

Ordering Mnemonic

JC/T4
T4/JC

Aliases

Syn-Thyroid Performed at Mayo Clinic Jacksonville

T4 (Thyroxine), Total Only, S Performed at Mayo Clinic Jacksonville

Tetraiodothyronine Performed at Mayo Clinic Jacksonville

Thyroid Hormone Performed at Mayo Clinic Jacksonville

Thyroxine Performed at Mayo Clinic Jacksonville

Thyroxine, Total Performed at Mayo Clinic Jacksonville

Key