Also known as: Free T3, FT3

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

Please see Turnaround times

Analytical method

Immunoassay - Indirect / Competitive

Analysis undertaken at these site(s)

  • John Radcliffe Hospital
  • Horton General Hospital

Reference intervals

Males

4d -<1 yr: 3.6-7.5 pmol/L
1-11 yrs: 4.3-6.8 pmol/L
12-14 yrs: 4.4-6.7 pmol/L
15-18 yrs: 3.5-5.9 pmol/L
>18 yrs: 3.0-5.4 pmol/L

Females

4d-<1 yr: 3.6-7.5 pmol/L
1-11 yrs: 4.3-6.8 pmol/L
12-14 yrs: 3.8-6.1 pmol/L
15-18 yrs: 3.6-5.7 pmol/L
>18 yrs: 3.0-5.4 pmol/L