One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube, 4 mL green top tube (heparin), or one 4 mL lavender top tube (EDTA). Draw within 30 minutes of next infusion. Note date and time of last dose.
Allow to clot, centrifuge and separate serum or plasma from cells within 2 hours. Freeze if specimen cannot be assayed within 48 hours.
48 hours refrigerated.
0.5 uL serum or plasma.
150 µL serum or plasma.
Refrigerated, or frozen on dry ice.
Specimen frozen/thawed more than once; refrigerated specimen received in laboratory more than 48 hours after collection.