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
0-14d: 13.5-41.3 pmol/L
2w-1m: 8.7-32.5 pmol/L
1m-<2yrs: 11.4-21.0 pmol/L
2-17yrs: 11.4-17.6 pmol/L
>17 yrs: 9.0-19.0 pmol/L
