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Test Code T3 T3 (Triiodothyronine), Total Only, Serum or Plasma

Performing Laboratory

Huntsville Hospital Laboratory/Madison Hospital Laboratory

Methodology

Enzyme Immunoassay (EIA)

Specimen Requirements

Container/Tube:

Preferred: Lithium heparin (light green-top)

Acceptable: Serum Gel

 Draw blood, spin down and send 0.5 mL (pediatric:  0.2 mL) of plasma or serum.

Specimen Stability Information

 

Specimen Type

Temperature

Time

Plasma,lithium heparin / Serum

RT, spun

8 days

  Refrigerated, spun 14 days

 

Reject Due To

 

Hemolysis

Mild:

ok

Gross:

ok

Lipemia

Mild:

ok

Gross:

ok

Icterus

Mild:

ok

Gross:

ok

 

Reference Values

 

Age

ng/mL

0 – 30 days

0.15 – 2.10

1 – 11 months

0.50 – 2.75

1 – 4 years

0.80 – 2.58

5 – 9 years

0.96 – 2.32

10 – 14 years

0.73 – 2.11

15 – 17 years

0.69 – 2.01

> 17 years

0.80 – 2.0

 

Day(s) Test Set Up

Monday through Sunday

CPT Coding

84480

Secondary ID

HHA1294

LOINC Coding

Test Name LOINC Code

T3 (Triiodothyronine), Total Only, Serum or Plasma

3053-6