Thyroid Profile
Also known as: '99 Thyroid Profile (Compliance)
Use
FTI is a physiologic index of metabolic activity that correlates with free thyroxine (T4)
Special Instructions
Not provided.
Limitations
The test may be subject to interference from biotin supplements if not discontinued prior to sample collection. The assay's performance may be affected by other factors such as hemolysis, lipemia, and improper sample handling or storage conditions beyond the acceptable stability periods.
Methodology
Immunoassay (ECLIA)
Biomarkers
Free Thyroxine Index
AnalyteT3 Uptake
AnalyteThyroxine (T4)
Analyte
LOINC Codes
- 90224-7 - Thyroxine & Thyroxine.free panel SerPl
- 3026-2 - T4 SerPl-mCnc
- 3050-2 - T3RU NFr SerPl
- 32215-6 - FT4I SerPl Calc-mCnc
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.7 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
If a red-top tube is used, transfer separated serum to a plastic transport tube.
Storage Instructions
Room temperature
Causes for Rejection
Use of oxalate, EDTA, or citrate plasma
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
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