THYROXINE (T4)

Also known as: Total T4

What you need to know about study THYROXINE (T4)

Sample type Serum or plasma
Delivery time 8 hours
Do I need to fast? Sí

What is this study and what is it for?

Synthetic hormone treatment monitoring (synthetic triiodothyronine [T3] will cause low total thyroxine [T4]). Follow-up of hyperthyroidism treatment with thiouracil and other antithyroid drugs. Thyroid function index when thyroxine-binding globulin (TBG) is normal and there is no nonthyroidal disease.

What type of sample is needed?

Serum or plasma

Preparation / Instructions

4-hour fast, do not take multivitamin the day before

Delivery time

8 hours

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