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Protein C Antigen

Test Name:Protein C Antigen
Epic Order Code:LAB489
CPT Code:85302  
Specimen(s) Type:Plasma; Full tube required
Acceptable Container(s):Top is light blue.
Testing Schedule:Monday-Friday, 8 a.m.-3 p.m.
Turn Around Time:STAT: NA
 Routine: 2-7 days
Collection Information:No special patient preparation is required. Obtain specimen by standard collection procedures. If only Protein C Ag is being collected, draw 5 mL into a red top tube, discard and then collect Protein C Ag tube. A full tube is required.
Transport Information:Deliver to lab immediately. All specimens must be signed into the laboratory.
Reference Clients:If unable to deliver to the lab within 1 hour, centrifuge the specimen for 10 minutes at 3500 RPM to ensure platelet poor plasma. Remove plasma from cells, taking care to avoid the WBC/platelet buffy layer and place into a transport tube. Store and transport at 2-8° C for up to 3 hours. If testing is delayed beyond this, the sample must be stored and transported frozen at -20° C and delivered to lab within 2 weeks.
Causes for Rejection:Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport, grossly hemolyzed, clotted, under or over-filled tube, interference by heparin or Factor VIII.
Reference Range:> 55%
Additional Information:Patients on coumadin or who are vitamin K deficient may have decreased levels.