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Test Mnemonic T3 T3 (Triiodothyronine), Total, Serum

Methodology

Clinical Significance:

Thyroid function test, particularly useful in the diagnosis of T3 thyrotoxicosis and confirmation of hyperthyroidism.

Performing Laboratory

Hallmark Health

Physician Office Specimen Requirements

Container/Tube:  Serum gel tube(s)

Specimen:  1 mL of serum

Transport Temperature:  Refrigerate

Collection Instructions:  No isotopes administered 24 hours prior to venipuncture.

Reference Values

0.80-2.00 ng/mL