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T3 Free (Free Triiodothyronine), Serum/Plasma

Test ID: FT3
Orderable by Ontario ND
Test
Specimen
Performance / Interpretation
Interface / Setup

Test

Method

ECLIA

Report Includes

Free T3 (Triiodothyronine)

Specimens

Serum; Plasma (Li Heparin); Plasma (EDTA)

Test Version

9-Jul-2025

Specimen

Specimens

Serum; Plasma (Li Heparin); Plasma (EDTA)

Sample Volume

1 mL

Specimen Comment

Barricor™ tube is not acceptable.

Collection & Handling

Handling Information

Store and send cold or frozen.

Stability

Refrigerated 7 days
Frozen 1 month

Rejection Criteria

Specimen Barricor™ tube

Test Version

9-Jul-2025

Performance / Interpretation

Method

ECLIA

Turnaround Time

2 days

Results

Name Units Reference Range Conversion Factor
Free T3 (Free Triiodothyronine) pmol/L
  • 0 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 - 6.8
 ng/dL x 15.7

Test Version

9-Jul-2025

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
FT3 20700Free T3 Serum (FT3) pmol/L

Test Version

9-Jul-2025