Total T4 - Total thyroxine - serum

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Eurofins Biomnis code

T4TOT

Synonyms
  • Endocrinology
  • Total tetraiodothyronine
  • Total thyroxine
Specialty

Biochemistry

Clinical 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.

Preanalytics
  • 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

Testing Laboratory

Biomnis Ivry

Contact(s)
Customer Care