Serum or Plasma
1 mL Blood
Light Green (Lithium Heparin PST)
If fasting collection is indicated, patient must be fasting at least 8 hours prior to collection. Serum collected in a serum separate tube (SST) or (red-top tube is also acceptable. If an off-site collection is being performed, collect blood in a potassium oxalate (gray-top) tube.
Room Temp=4 Hours; Refrigerated=4 Hours; Frozen=Unacceptable
0.5 mL Serum or Plasma
0.3 mL Serum or Plasma