Acceptable test to detect and subtype protein C deficiency. Do not order if individual has been on warfarin therapy in the previous 2-4 weeks.
Clotting/Enzyme-Linked Immunosorbent Assay
This test is New York DOH approved.
- Patient Preparation
- Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.
- Specimen Preparation
- Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
- Storage/Transport Temperature
- CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
- Unacceptable Conditions
- Serum. Non-frozen or hemolyzed specimens. Anticoagulants other than citrate.
- Ambient: 4 hours; Refrigerated: Unacceptable; Frozen at -20°C: 3 months, at -70°C: 6 months
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.
If Protein C functional is decreased, then Protein C, Total Antigen, will be added. Additional charges apply.
85303; if reflexed, add 85302
|Component Test Code*||Component Chart Name|
|0030113||Protein C Functional|
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
- Protein C Profile
- Protein C, functional and total