Eurofins Biomnis code

FT3

Synonyms

• Endocrinology
• Free triiodothyronine
• FT3

Specialty

Biochemistry

Clinical significance

The unbound, biologically active fraction of triiodothyronine (T3) represents 0,3% of total T3. Variations in the levels of transport proteins do not affect the level of the unbound form. This test is useful in the investigation of hyperthyroidism and for therapeutic monitoring of patients taking amiodarone or corticosteroids.

Preanalytics

• 1 mL :
• serum
•   Reftrigerated

• A tube specifically for this analysis : No

Further information

ATTENTION: interference possible in patients treated with biotin (vitamin B7, B8 or H) or taking any food supplement containing biotin. Essential to STOP treatment 8 days before taking the sample.

Methodology

Electrochemiluminescence

Turnaround time

2 days