Biotin supplements may cause clinically significant interference for this test assay. If interference is suspected, it is strongly recomended that biotin is discontinued for at least one week prior to retesting

Samples should not be taken from patients receiving therapy with high biotin doses (i.e. > 5 mg/day) until at least 8 hours following the last biotin administration.

Fasting prior to specimen collection is recommended 

Fasting for a blood test

Gold serum separator (SST) tube

Immediatley following collection, mix sample by gently inverting 5 times

1. Allow sample to clot for a minimum of 30 minutes
2. Spin within two (2) hours of sample collection

Lt green plasma separator (PST)

Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times, to prevent clotting

1. Spin 

Refrigerated - 2 days

Ambient - 4 hours

Frozen  -  6 months

• Improper labels (unlabeled or mislabeled)
• Hemolysis 
• Improper anticoagulant or ratio
• Delay in transport
• Improper storage temperature affecting results
• Improper container
• Leaking container resulting in compromised specimen
• Quantity not sufficient (QNS)

Electrochemiluminescence immunoassay (ECLIA)

2.6 - 24.9 uIU/mL