Specimen Requirements

1 mL of Lithium Heparin plasma

• Preferred Specimen:  Light Green Plasma Seperator Tube (PST) 
• Acceptable Specimen: Dark Green Lithium Heparin tube

Centrifuge blood as soon as possible, or send unspun blood to laboratory within 4 hours of draw. Avoid hemolysis. Protect specimen from light.
Note:  Do not uncap tube once specimen is drawn.