Unit Code 8724:
T4 (Thyroxine), Total Only, Serum
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.
Special Instructions and Forms
Method Name
Immunoenzymatic Assay
Reporting Name
T4 (Thyroxine), Total Only, S
Ordering Mnemonic
T4
Aliases
Syn-Thyroid
Tetraiodothyronine
Thyroid Hormone
Thyroxine (ORDER 8724 if not specified)
Thyroxine (T4), Total & Free ORDER 8684
Thyroxine, Total
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