Free Thyroxine Index Low. Low t3 (liothyronine) uptake (21%), normal tsh (3.190), normal t4 (9.4), normal free thyroxine index (2.0). Tsh low, t4 total low, free t4 low, t3 total low, free thyroxine index low, trh stimulation test = tsh still low
Test was done at 8 am after. Free t4 by the nondialytic technique is often low, and the t3 is commonly low. Reference ranges for the free thyroxine index:
A normal range for tsh according to clinical research is 0.4 milliunits per liter (mu/l) to 4.0 mu/l.
The free thyroxine index (fti) is determined by the following calculation: T 4 present in the body is of two specific types. A low tsh with an elevated ft4 or fti is found in individuals who have hyperthyroidism. Reference ranges for the free thyroxine index: