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Test ID: FRT3    
T3 (Triiodothyronine), Free, Serum

Secondary ID A test code used for billing and in test definitions created prior to November 2011

9404

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.

Yes

Useful For Suggests clinical disorders or settings where the test may be helpful

Free triiodothyronine (T3) is a second- or third-level test of thyroid function; it provides further confirmation of hyperthyroidism, supplementing the tetraiodothyronine (T4), sensitive thyrotropin (sTSH), and total T3 assays

 

Evaluating clinically euthyroid patients who have an altered distribution of binding proteins

 

Monitoring thyroid hormone replacement therapy

Method Name A short description of the method used to perform the test

Immunoenzymatic Assay

Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

T3 (Triiodothyronine), Free, S

Aliases Lists additional common names for a test, as an aid in searching

Free T3 (Triiodothyronine)
FT3 (Free Triiodothyronine)
T3 (Triiodothyronine), Free, Serum
Triiodothyronine, Free
Free T3 Only, Serum