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Test ID:
FT3
T3 Free (Free Triiodothyronine), Serum/Plasma
Orderable by Ontario ND
Test Overview
Method
Electrochemiluminescent immunoassay (ECLIA)
Result Included
Free T3 (Triiodothyronine)
Specimen
Specimen Type
SerumPlasma (Li Heparin)
Plasma (EDTA)
Volume
Sample Volume
1 mL
Specimen Comment
Barricor™ tube is not acceptable.
Collection & Handling
Handling Information
Store and send cold or frozen.
Stability
| Refrigerated | Frozen |
|---|---|
| 7 days | 1 month |
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Barricor™ tube |
Performance & Interpretation
Turnaround Time
2 days
Results
Name
Units
Reference Range
Conversion
-
Free T3 (Free Triiodothyronine)pmol/L0 to < 1 month: 4.2 - 13
1 to < 12 months: 5.2 - 8.6
1 to < 14 years: 4.6 - 7.8
14 to < 19 years: 5 - 8.2
> 19 years: 3.1 - 6.8ng/dL x 15.7
Referral Location
Canada
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| FT3 | Free T3 Serum (FT3) | 20700 | pmol/L |
Test Version
Last Updated
2025-07-09