Patients who are undergoing biotin therapy and/or ingesting biotin supplements with levels of >100ng/mL will show a falsely high TT3 result in the Beckman TT3 assay.
If overnight - Frozen
Minimum 1.0 ml serum. Ideally 1.5 ml. This volume allows all total thyroid function tests to be performed. Fridge 4C.
1.3 – 2.7 nmol/L (Manufacturers data).
Beckman-Coulter Access Analyser - CMIA
$28.96 (Exclusive of GST)
EDTA not acceptable.
Adjunct to primary thryoid function screen.
Automated method with different reference range introduced 22 August 2014
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