Triiodothyronine (T3), Free
Test Code: 010389
Performing Lab: LabCorp
CPT Code: 84481 001
Synonym
Free T3; T3, Free; T3, Free, Serum; Tri-iodothyronine, Free; Unbound T3
Specimen Type
Serum (preferred) or plasma
Specimen Container
Red-top tube, gel-barrier tube, OR green-top (lithium heparin) tube. Do NOT use oxalate, EDTA, or citrate plasma.
Volume
1 mL
Minimum Volume
0.7 mL (NOTE: This volume does NOT allow for repeat testing.)
Specimen Handling
If a red-top tube or plasma tube is used, transfer separated serum or plasma to a plastic transport tube.
Unacceptable Conditions
Citrate plasma specimen; improper labeling
Temperature
Room temperature
Methodology
Electrochemiluminescence Immunoassay (ECLIA). This assay is performed on the Roche cobas instrument in multiple laboratories throughout Labcorp.
Stability
Room Temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 010389 | Triiodothyronine (T3), Free | 3051-0 |
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