Thyroxine (free thyroxine, fT4)
Free thyroxine (T4) is a measure of the amount of T4 that is not protein bound. Most T4 is protein bound, mainly to thyroxine-binding globulin. The unbound portion is the active part
|01 (SE) - Serum Gel
|N.B Both serum and heparin plasma samples are acceptable.
Day Case: 24 Hours
In-Patient: 24 Hours
Out-Patient: 24 Hours
|Blood Sciences Cross Site
|For further details please contact Leeds Pathology customer services: email@example.com.
|Minimum volume - 250µl serum / plasma
Instructions for Lab Staff: Standard lab processing- No special requirements
|Ref. Range Notes
|Blood Sciences reference ranges are available through the useful information and links page: