Free Thyroxine Index Labcorp. The free thyroxine index has generally been replaced by free thyroxine in the assessment of thyroid function, but is occasionally useful when a free t4 result is suspected of being anomalous. Free thyroxine index (fti) this test is not available in all locations.
Reference range 4.5 to 12.0 ug/dl; Thyroid profile (partial) ( labcorp ) covered components: Free thyroxine index (fti) this test is not available in all locations.
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Thyroid basic panel with tsh. The comprehensive thyroid profile ii includes free thyroxine index (fti); The free thyroxine index has generally been replaced by free thyroxine in the assessment of thyroid function, but is occasionally useful when a free t4 result is suspected of being anomalous. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin b7 or b8, vitamin h, or coenzyme r).
