FT3
Test:
305
CPT:
84481
Synonyms
1-Free T3
2-Free Triiodothyronine (T3)
3-FT3
Special Instructions
Expected Turnaround Time
6 – 10 days
Specimen Requirements
Specimen
6 – 10 days
Volume
1 Ml
Minimum Volume
0.3 mL (Note: This volume does not allow for repeat testing).
Container
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (sodium heparin) tube
Collection
Serum/plasma must be separated from cells within 45 minutes of venipuncture. Send serum/plasma in a plastic transfer tube.
Storage Instructions
Freeze (preferred) or refrigerate. Stable at room temperature or refrigerated for five days. Stable frozen for 70 days.
Causes for Rejection
Whole blood
Test Details
Use
Equilibrium dialysis and high-pressure liquid chromatography/tandem mass spectrometry (HPLC/MS-MS)