TRIIODOTHYRONINE, FREE

Mnemonic

FT3

Synonym

T3 Free - Free Triiodothyronine - Free T3

Specimen Collection Requirements

Collect

Serum, one 5.0 mL gold (SST), 7.0 mL red top tube or Li Heparin plasma

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum from cells within 2 hours of collection.

Preferred Volume

1.0 mL

Minimum Volume

0.4 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens, plasma

Stability

AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 8 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 3 months

Testing Information

Performed

Sun - Fri

Method

Chemiluminescent Immunoassay

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

Adult: 2.20-4.10 pg/mL
age adjusted

CPT Codes

84481

Last Updated: Thursday, January 5, 2017 03:42:32 AM