|Test||T3 (TRIIODOTHYRONINE), FREE, SERUM|
|Description||Useful for: T3 Free is used to diagnose hyperthyroidism and to clarify thyroid status in the presence of a possible protein binding abnormality.
No sample should be collected on patients receiving therapy with high biotin doses (i.e. biotin therapy for Multiple Sclerosis or oncology patients; skin, hair and nail supplements, or multivitamins containing > 5 mg/day) until at least 12 hours after the last biotin administration. If unsure, or if the clinical picture does not fit the results please contact the laboratory . We have methods to check for biotin interference as well as for any other interferences and for the accuracy of the results.
|Specimen||Draw blood in either a plain red-top or serum gel tube. Spin down and send 1.0 mL (minimum: 0.5 mL) of serum refrigerated in a plastic screw-capped vial.|
|Reference Values||0 - 19 years: 1.5 - 6.4 pg/mL (Reference ranges for infants and children are suggested ranges)
> 19 years 2.3 - 4.2 pg/Ml
|Analytic Time||1 Day|
|Day(s) Test Set Up||Monday through Sunday|