Specimen Requirements

Draw blood in a light green-top (lithium heparin) plasma gel tube(s). For pediatric specimen, draw blood in two green-top (lithium heparin) MICROTAINER(S)®. Label specimen with patient’s name (first and last), date of birth, date and time of draw, and phlebotomist’s initials. Spin down and send 1 mL of lithium heparin plasma refrigerated.

Hemolyzed specimens are not acceptable.

Specimen stability:   2 days at 2-8°C
                                    
                                    
Minimum volume:    0.4 mL