Eurofins Biomnis code

T3TOT

Synonyms

• Endocrinology
• Total triiodothyronine

Specialty

Biochemistry

Clinical significance

About 80% of the triiodothyronine (T3) in the circulation is derived by the deiodination of thyroxine (T4). Increased levels are seen in primary (peripheral) and secondary (central) hyperthyroidism. In some forms of hyperthyroidism, only T3 is elevated (T3-secreting adenomas). T3 levels depend on the concentration of transport proteins and vary in response to certain drugs.

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

1 day