Test directory: Protein C Activity

Ordering Code714
Test NameProtein C Activity
AliasFunctional Protein C
Preferred SpecimenPlasma
Preferred ContainerCitrate, 3.2% (Lt Blue)
Other Specimen/ContainerWhole Blood in Citrate, 3.2% (Lt Blue) if testing is done within 4 hours.
Optimum VolumePlasma = 1 mL
Whole Blood = Entire tube
Collection InstructionsDraw full tube. Mix tube well
Patient should be off of coumadin for 2 weeks and off high levels of heparin for 48 hours before sample collection
Consult pathology for further information.
Handling InstructionsDouble centrifuge plasma, separate, and freeze at -20 deg. C immediately. Do NOT thaw once specimen is frozen.
Transport RequirementsPreferred method of transport is frozen plasma.
Specimen StabilityAmbient: 4 hours Whole Blood (unopened tube)
Ambient: 4 hours Plasma
Frozen: 1 month Plasma
Rejection CriteriaClotted, Contaminated, Hemolyzed,
Improperly filled or underfilled tube,
Specimen older than stability limits.
Avail. StatNO
Analytic TimeUp to 1 Week
MethodologyClot Detection

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Protein C ActivityALL70-13070-130%