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
Males and females
<1 yr: 10.5-18.8 pmol/L
1-18 yrs: 10.0-14.3 pmol/L
>18 yrs: 9.0-19.0 pmol/L
