Item Value
Test name Free T4
Available Stat? No
Turn around times 0 to 2 days
In House Availability Monday - Saturday (day shift)
Performed by China Basin Chemistry
Normal range
Age Male (pmol/L) Female (pmol/L)
1-3 days 10-36 11-25
4-30 days 6-30 8-25
1-12 months 10-26 11-24
1-5 years 11-21 12-19
6-10 years 11-19 11-19
>10 years 10-18 10-18


Pediatric reference ranges adopted from Pediatric Reference Intervals seventh edition (Soldin, Steven J. et al) and Canadian Laboratory Initiative on Reference Interval Database (CALIPER) Clin Biochem 2009;42:885-991

Adult 95% reference range from the manufacturer (personal communication, Abbott Labs) was verified by running 148 non-autologous donor samples from subjects on no medications and neg. for TgAb and TPO Ab
Container type Gold top or Light Green top
Amount to Collect 1 mL blood
Sample type Serum or plasma

If you have additional questions regarding this test, please call: 415-353-1667