Eurofins Biomnis code

T4TOT

Synonyms

• Total thyroxine
• Total tetraiodothyronine
• Endocrinology

Clinic significance

Thyroxine (T4) is the precursor of triiodothyronine (T3). High levels are associated with hyperthyroidism and iodine overload. Low levels are associated with hypothyroidism and iodine deficiency. T4 levels depend on the concentration of transport proteins and vary in response to certain drugs.

Prenalytics

• 1 mL
• Serum
• Refrigerated

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