Serum or Plasma
1-2 mL Blood
Red Top (No Additive)
**DO NOT COLLECT in Lithium Heparin (Green-Top) Tubes (PST ). THEY WILL BE REJECTED.** Serum collected in a serum separator tube (SST or plasma collected in a sodium heparin (dark green-top) or EDTA (lavender-top) tube is also acceptable. Samples are commonly drawn approximately 12 hours after the last dose of lithium has been taken.
Room Temp: 8 Hours; Refrigerated: 24 Hours; Frozen: 6 Months
Lithium heparin (green-top) tube (PST)
1 mL Serum or Plasma
0.5 mL Serum or Plasma
Separate serum or plasma within 4 hours of collection. Deliver directly to Chemistry.