1 mL lithium heparin plasma (green top). Centrifuge sample and separate plasma from cells within 2 hours of collection. Transfer plasma to a plastic transport tube. Clearly label tube as lithium heparin plasma. Freeze. Critical Frozen (CFZ)
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.
When multiple tests are ordered, submit a separate tube for this test.