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Thyroxine (T4) Free Blood Test, Dialysis and LC/MS-MS (Endocrine Sciences)

A Thyroxine (T4) Free Blood Test, Dialysis and LC/MS-MS to assess Free T4 may be indicated when binding globulin (TBG) problems are perceived, or when conventional test results seem inconsistent with clinical observations.

Sample Report

Test Code: 501902

Also Known As:

Methodology: Direct dialysis mass spectrometry; high-pressure liquid chromatography/mass spectrometry (HPLC/MS)

Preparation: No special preparation required.

Test Results: 7-9 days. May take longer based on weather, holiday or lab delays.

Description

Free T4 may be indicated when binding globulin (TBG) problems are perceived, or when conventional test results seem inconsistent with clinical observations. It is normal in subjects with high thyroxine-binding globulin hormone binding who are euthyroid (ie, free thyroxine should be normal in nonthyroidal diseases). It should be normal in familial dysalbuminemic hyperthyroxinemia.

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