Test & Collection Guide

 New search...

Keyword Search:

Test name:


Manual search:

Thyroid Function Tests (TSH and FT4)

Alternate names:
Free Thyroxine, FT3, FT4, TFT, Thyroid Stimulating Hormone, Tri-iodothyronine, TSH
Test Code:
Specimen types:
Container types:
Plain Tube with gelPlain Tube with gel
Collection Instructions:
Transport specimen at Room Temperature to lab
Minimum Adult Volume:
2 mL
Result Turnaround Time:
5 hours
Reference Interval:


Thyroid Function Reference Range
Thyroid Stimulating hormone (TSH) 0.27 - 4.20 mU/L
Free Thyroxine (FT4) 12 - 22.0 pmol/L
Free Tri-iodothyronine (FT3) 3.1 - 6.8 pmol/L


Laboratory Use Only
Storage Instructions:

TSH is performed. Free T4 is performed only if indicated by clinical details or the TSH result

Free T3 is performed where appropriate.

Clinical comments are essential - record of therapy with thyroxine or anti-thyroid drugs, suspicion of pituitary disease, drug therapy with amiodarone, lithium, phenytoin, etc., which will permit additional tests as required.