T4, Free, Direct Dialysis
Fasting Required: Yes, fasting preferred

Specimen: Blood

>strong>Results: 7-10 Business Days

Description: This test is used to evaluate thyroid function in individuals who may have protein abnormalities that could affect total T4 levels. It is used to evaluate thyroid function and monitor replacement and suppressive therapy. Differentiates euthyroid hyperthyroxinemia from hyperthyroidism as well as euthyroid hypothyroxinemia from hypothyroidism.

Methodology: Equilibrium Dialysis/Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.