Recommended test to detect protein C deficiency. Do not order if individual has been on warfarin in the previous 2-4 weeks.
Electromagnetic Mechanical Clot Detection
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
Transfer 1.5 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Serum. EDTA plasma, clotted or hemolyzed specimens.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months, at -70°C: 6 months
Effective November 17, 2014
|18 years and older||83-168%|
Patients on warfarin may have decreased protein C values. Patients should be off warfarin therapy for two weeks for accurate measurement of protein C levels. Artificially increased functional protein C values may be due to heparin therapy or the presence of direct thrombin inhibitors or factor Xa inhibitors.
No compliance statements are in use for this test.
|Component Test Code*||Component Chart Name||LOINC|
|0030113||Protein C Functional||27819-2|
- Functional Protein C
- Protein C Activity
- Protein C, Functional, Plasma