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.
Tube
01 (SE) – Serum Gel
ID
Tests&Tubes0120
Additional information
N.B Both serum and heparin plasma samples are acceptable.
Turn around
A&E: N/A
Day Case: 24 Hours
In-Patient: 24 Hours
Out-Patient: 24 Hours
GP: N/A
Send to
Blood Sciences Cross Site
Contact
For further details please contact Leeds Pathology customer services: [email protected].
Collection Con
Minimum volume – 250µl serum / plasma
Instructions for Lab Staff: Standard lab processing- No special requirements
Sample REQ
Blood
Ref. Range Notes
Units
pmol/L