Allow serum separator tube (SST) contents to clot in an upright position for at least 30 minutes (60 minutes for Red Top tube.)
Centrifuge within 2 hours of collection.
Label 2 plastic transport tubes with two identifiers. Acceptable identifiers include patient’s name, date of birth, social security number, requisition number, and medical record number. Label the tube as serum.
Transfer 0.5 mL serum to each of the 2 tubes and freeze - send this aliquot separately when multiple tests are ordered.