FT4 (Free Thyroxine)

NameFree Thyroxine (FT4)
Tube TypeSerum (Gold top)
Reporting Unitspmol/L
Reference Range<7 d
1 w – <3 mo
3+ mo
11 – 32
11.5 – 28.3
12 – 22
Analytical Range1.3 – 100
AvailabilityNDDH (Mon-Fri)
Target turnaround time1 working day
Special requirements & notesNote if patient is taking thyroid medication
Patient preparationIf taking supplements, do not take in the 8 hours prior to blood test – may contain agents which affect the analysis
Volume required1 tube (4ml)
If delayed transport to lab, store:Centrifuged, in refrigerator
Factors affecting result interpretation
Time limit for add on test4 days
Pathology disciplineBiochemistry
‘Lab Tests Online’ linkClick Here
Posted in Assay.

Last updated: June 6, 2019