FT3 (Free Triiodothyronine)

NameFree Triiodothyronine (FT3)
Tube TypeSerum (Gold top)
Reporting Unitspmol/L
Reference Range<7 d
1 w – <3 mo
3+ mo
2.65 – 9.68
3 – 9.28
3.1 – 6.8
Analytical Range0.4 – 50
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’ link
Posted in Assay.

Last updated: June 6, 2019