FREE T3 (FREE TRI-IODOTHYRONINE)

Requirements

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    Sample Required Serum

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    Preperations Required No specific preparation required

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    Gender Male & Female

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    Age Group 0 - 99 Years

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    Collection AtHome & Lab

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    1 Observations included

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    Results with in 22 Hours

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FREE T3 (FREE TRI-IODOTHYRONINE)

Observations Included

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10,000+ Tests Done

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Trusted By Doctors

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NABL Certified Labs

Overview

Normally triiodothyronine (T3) circulates tightly bound to thyroxine-binding globulin and albumin. Only 0.3% of the total T3 is unbound (free); the free fraction is the active form. In hyperthyroidism, both thyroxine (tetraiodothyronine; thyroxine: T4) and T3 levels (total and free) are usually elevated, but in a small subset of hyperthyroid patients (T3 toxicosis) only T3 is elevated. FT3 levels may be required to evaluate clinically euthyroid patients who have an altered distribution of binding proteins (eg, pregnancy, dysalbuminemia). Elevated free triiodothyronine (FT3) values are associated with thyrotoxicosis or excess thyroid hormone replacement. Ref. Value: > or =1 year: 2.8-4.4 pg/mL.

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