What does fT4d stand for?

Free T4 (Thyroxine) by Equilibrium Dialysis

This definition appears very rarely and is found in the following Acronym Finder categories:

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Samples in periodicals archive:

Thyrotropin and Post-Surgical Stress In ten patients followed for six days after surgery, operative trauma was associated in all patients with significant decreases in serum total and free T3 and a significant increase in serum reverseT3 (rT3) levels, with no variations in serum total and free T4 concentrations.

Psychoneuroimmunoendocrinology Review and Commentary

At baseline, subclinical hypothyroidism--defined as an abnormally high serum TSH level in the presence of normal serum free T4 and total on free T3--was identified in 6.

Subclinical thyroid dysfunction tied to increased mortality; data ...

There may be more information here than you were looking for, but one day you will be glad you have this when someone asks you what does a TSH of 11 with a free T4 of 1.

Thyroid for Dummies, 2nd ed

Free T4 concentrations were significantly higher in patients treated with LT4 therapy compared with their preoperative T4 levels.

Pharmacology Watch

Free T4 concentrations were significantly higher in patients treated with LT4 therapy compared with their preoperative T4 levels.

Pharmacology Watch: Erythropoietin and Cancer Death Rates

Q Most automated chemistry analyzers now can directly determine free T4 (fT4).

Measured vs. calculated free T4

However, for a screening programme for detecting the occult/ hidden cases of hyperthyroidism, estimation of the serum free T4 ideal, since T4 is the major hormone of the thyroid.

Tests and Treatment for Hyperactive Thyroid Gland

These likely will be a TSH (thyroid stimulating hormone) blood test, along with T4, T3, Free T4 and Free T3 tests.

Can't Lose Weight? Maybe You Have A Thyroid Disorder