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Vanderbilt Pathology Laboratory Services

Test Directory



PROTEIN C ANTIGEN (PCA)

Department: Coagulation
Test Synonym(s): PCA, Protein C Antigen Total
CPT Codes: 85302
Methodology: ELISA
Reference Range: 70 - 140%
Tube Type: Light blue top tube (Sodium CItrate) - 2.7 mL
Specimen: Citrated plasma - platelet poor
Pediatric Requirements: Peds: 2.7 mL; Neonated: 1.8 mL
Volume: 1.0 mL
Minimum Volume: 1.0 mL
Temperature: Room Temperature or send as frozen plasma aliquot if sample will not be received into the lab within 4 hours.
Stability: Refrigerated: 8 hours, frozen at -70 C: one month
Reasons for Rejection: Clotted sample, incorrectly filled tube, samples sent as whole blood > 4 hours old.
Days Performed: Wednesday
Times Performed: 9:00 A.M.
TAT: 7 days
Special Instructions: Deliver to lab immediately. Tube must be full and not clotted. Indwelling lines should be flushed with saline only and 5 mL of blood should be discarded prior to collecting coagulation samples.

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