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Thyroid Panel
0070141
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Ordering Recommendation
Not recommended for routine thyroid screening.
Mnemonic
T7
Methodology
Quantitative Electrochemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Serum separator tube or plasma separator tube. Also acceptable: Lavender (EDTA), pink (K2EDTA), or green (sodium or lithium heparin).
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature
Refrigerated.
Unacceptable Conditions
Grossly hemolyzed specimens.
Remarks
Stability
After separation of cells: Ambient: 4 days; Refrigerated: 8 days; Frozen: 1 year
Reference Interval
| Test Number |
Components |
Reference Interval |
||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Free Thyroxine Index Calculation | FTI 1.7-4.2 | |||||||||||||||||
| 0070135 | T3 Uptake | 28-41% uptake | ||||||||||||||||
| 0070140 | Thyroxine |
|
Interpretive Data
Thyroxine, Free (FT4) (0070138) is the preferred test alternative for T3 uptake and Free Thyroxine Index tests.
Compliance Category
FDA
Note
FTI = Free Thyroxine Index
Hotline History
N/A
CPT Codes
84479; 84436
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0070135 | T3 Uptake | 3050-2 |
| 0070140 | Thyroxine | 3026-2 |
| 0070196 | Free Thyroxine Index Calculation | 32215-6 |
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
- Free Thyroxine Index
- FT4 Index
- FTI
- T3 uptake
- T7
- thyroxine
- Thyroxine Index
Thyroid Panel
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