Also known as: Free T4, FT4
Specimen requirements
Adult sample type: Serum (gold/yellow top SST)
Paediatric sample type: Plasma (orange top paediatric tube)
Collection requirements: No special requirements
Cost
Price on application
Turnaround time
Analytical method
Immunoassay - Indirect / Competitive
Analysis undertaken at these site(s)
- John Radcliffe Hospital
- Horton General Hospital
Reference intervals
Female
<1 year: 11.0 - 23.6 pmol/L
1 - 5 years: 11.7 - 20.8 pmol/L
6 - 10 years: 10.9 - 19.0 pmol/L
11 - 14 years: 10.0 - 17.0 pmol/L
15 - 19 years: 10.2 - 17.3 pmol/L
> 19 years: 9.0 - 19.0 pmol/L
Male
<1 year: 11.0 - 23.6 pmol/L
1 - 5 years: 11.7 - 20.8 pmol/L
6 - 10 years: 10.9 - 19.0 pmol/L
11 - 14 years: 10.0 - 17.0 pmol/L
15 - 19 years: 10.2 - 17.3 pmol/L
> 19 years: 9.0 - 19.0 pmol/L
