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Test Code T3F.1 TRIIODOTHYRONINE (T3) FREE

Methodology

Competitive Two-Step Chemiluminometric Immunoassay

Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

Serum

Serum Gel Tube

Container/Tube: Serum gel tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

 

Alternate:

Serum

Plain, Red-Top Tube

Container/Tube: Plain, red-top tube(s)
Specimen Volume: 1 mL (minimum volume: 0.5 mL) of serum

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

 

 

Plasma

Container/Tube: Green-top (lithium heparin) tube(s)

Specimen Volume: 1 mL (minimum volume: 0.5 mL) of plasma

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (plasma).

Day(s) Test Set Up

Monday through Friday

Reference Values

2.8-5.3 pg/mL

Performing Laboratory

Logan Health Medical Center-Chemistry

Test Classification and CPT Coding

84481

Specimen Transport Temperature

Refrigerate