Test Directory

Tri-iodothyronine, free (free T3)

Brown Cap, Gel Clotted	Volume Range 1.0 ml Additive per Container None
Orange Cap	Volume Range 1.0 ml Additive per Container Lithium-heparin

Orange Cap - Paediatric	Volume Range 0.40 ml Additive per Container Lithium-heparin

Male & non-pregnant Female: 3.1 - 6.8 pmol/L

0 - 28 days: 4.2 - 13 pmol/L
28 days - 1 year: 5.2 - 8.6 pmol/L
1 year - 14 yrs: 4.6 - 7.8 pmol/L
14 - 18 yrs: 5.0 - 8.2 pmol/L

Pregnancy
First trimester: 3.8 - 6.0 pmol/L
Second trimester: 3.2 - 5.5 pmol/L
Third trimester: 3.1 - 5.0 pmol/L

RIE

51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA

Telephone (Biochemistry): 0131 242 6806

4 days

See notes under Thyroid investigations

For further information on the potential for biotin interference please click here.