T4 Free, Direct Dialysis:
Fasting Required: Yes, 10-12 hours fasting preferred but not required
Lab: Quest Diagnostics
Specimen: Blood
Results: Test run Sun, Mon, Wed, Thurs; Report available in 4-7 days average processing time
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.
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.
Lab: Quest Diagnostics
Specimen: Blood
Results: Test run Sun, Mon, Wed, Thurs; Report available in 4-7 days average processing time
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.
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.