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T3
T3 (TRIIODOTHYRONINE), TOTAL, SERUM

Test Code T3 
Test T3 (TRIIODOTHYRONINE), TOTAL, SERUM 
Methodology Electrochemiluminescence Immunoassay 
Description Useful for evaluating patients with suspected hyperthyroidism and to a lesser extent hypothyroidism; indicating thyroid response to both stimulatory and suppressive tests.

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.

Biotin interference would falsely increase the result of this assay. 

Specimen Draw blood in either a plain, red-top tube or serum gel tube. Spin down and send 1.0 mL (minimum volume: 0.5 mL) of serum refrigerated. 
Reference Values 80 - 200 ng/dL 
Analytic Time 1 Day 
Day(s) Test Set Up Monday through Sunday 
CPT Code(s) 84480