Category: THYROID | Code: K4305
Free T4 (FT4)
Function
This test checks the level of the FT4 hormone. This test is useful in assisting the diagnosis of thyroid disease.
| Test Schedule | Estimated Test Result | Container | Substance | Stability |
|---|---|---|---|---|
| Monday - Saturday | 1 day | Plain | Serum, 0.5 mL | 7 days, 2-8⁰C |
Condition
Not lysate and not lipemic
Method
Immunoassay (IA)
Score Reference
<1 Month: Not established 1-23 Months: 0.9-1.4 ng/dL 2-12 Years: 0.9-1.4 ng/dL 13-20 Years: 0.8-1.4 ng/dL >20 Years: 0.8-1.8 ng/dL