NOTE: For non-hospital requests, a TSH is the only test performed when a TFT is requested.
In the event that the TSH is greater than 5.0 mIU/L, a FT4 (and FT3 if TSH low) will be automatically added to the request.
If FT3 and/or FT4 are required up front, they must be specifically requested and be accompanied by clinical notes which satisfy one of the MBS requirements:
- thyroid disease is being monitored
- investigation of dementia
- psychiatric illness; amenorrhoea
- infertility
- pituitary dysfunction
- sick eurythoid syndrome
- patient is on medication/drugs that interfere with thyroid hormone metabolism or function.
As of 24/2/2020, TFT performed on Beckman-Coulter DxI. (Previous method: Roche e602). Please note reference intervals have been adjusted.
