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
| 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: leedsth-tr.pathologycustomerservice@nhs.net. |
| Collection Con | Minimum volume - 250µl serum / plasma Instructions for Lab Staff: Standard lab processing- No special requirements |
| Sample REQ | Blood |
| Ref. Range Notes | Blood Sciences reference ranges are available through the useful information and links page: https://www.leedsth.nhs.uk/a-z-of-services/pathology/blood-sciences/useful-information-and-links/ |
| Units | pmol/L |
| Telepath | FT41L |
| ICE Codes | LFT4LTHY |
