Test Code T3 Triodothyronine (Total T3)

Performing Laboratory

Hunterdon Medical Center Laboratory

Useful For

T3 measurement may be useful in the diagnosis of hyperthyroidism in patients with low TSH level and normal T4.

Specimen Required

Test updated March 2017

Container/Tube
Acceptable	PST (Li Hep) Gel- Mint Green Top
Acceptable	SST
Specimen Volume	3.0mL
Minimum Volume	1.0mL

Specimen Type

Plasma/Serum

Specimen Transport Temperature

Ambient

Specimen Stability

Specimen	Temperature	Time Frame
Plasma	Refrigerated 2-8°C	2 days
Serum-gel tube	Refrigerated 2-8°C	7 days

Day(s) Test Set up

Monday through Sunday

Reference Values

0.80-2.00 ng/mL

Methodology

ECLIA: Electrochemiluminescence Immunoassay

CPT Code

84480

Loinc Code

3053-6