Collection Mix well and send immediately to the laboratory on ice. Must be delivered to the laboratory within 4 hours of collection. If testing is delayed, centrifuge specimen, remove, and freeze plasma (-30°C).
Storage Instructions Separate plasma in refrigerated centrifuge. Test within 1-2 hours. Freeze plasma at -30°C if test cannot be performed in 1-2 hours.
Patient Preparation Avoid Coumadin® therapy for 2 weeks and heparin therapy for 2 days prior to test.
Causes for Rejection Specimen clotted, hemolyzed, QNS, or received more than 1 hour after collection; tube not full; specimen does not meet labeling requirements
