Autoimmune Antibodies: 1 day room temperature; 1 week refrigerated; 1 month frozen
Thyroid peroxidase AB: 8 days room temperature; 8 days refrigerated; 6 months frozen
Complement c3: 4 days room temperature; 8 days refrigerated; 8 days frozen
Complement c4: 2 days room temperature; 8 days refrigerated 3 months frozen
Rheumatoid factor, quant: 1 day room temperature; 8 days refrigerated; 3 months frozen
Transport Temperature
Refrigerated
Collection Instructions
Collect 2 serum separator tubes. Allow tubes to clot in an upright position for at least 30 minutes, then centrifuge samples within 2 hours of collection. Transfer serum to a plastic transport tube. Refrigerate. Note: Do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration.
Alternative Specimen
Collect 2 plain red top tubes. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tubes as serum from a plain red top tube. Refrigerate. Note: Do not collect samples from patients receiving therapy with high biotin doses (>5 mg/day) until at least 8 hours following the last biotin administration.