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Vanderbilt Pathology Laboratory Services

Test Directory



ANTI PROTEASE 3 (PR3)

Department: Immunology
Test Synonym(s): PR3
CPT Codes: 83520
Methodology: ELISA
Reference Range: Negative
Tube Type: Red top (clot activator with gel) or red top (no gel)
Specimen: Serum
Alternate Specimen: None
Pediatric Requirements: 1 mL whole blood
Volume: 5 mL whole blood
Minimum Volume: 1 mL whole blood
Temperature: Refrigerate, separate and freeze
Stability: Refrigerated: 48 hours
Reasons for Rejection: Drawn in any anticoagulant
Days Performed: Thursday
Times Performed: Afternoon
TAT: Up to 4 days
Significance: Anti-PR3 is also part of the ANCA test panel. It should not be ordered alone unless the patient has previously been positive for anti-PR3.
Special Instructions: If the patient is previously positive for Anti-PR3, the previous sample will be run with the new sample if the previous sample is available.

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