ARUP's Laboratory Test Directory
| 0050527: Serine Protease 3 Antibody |
| Test Mnemonic: PR3 | |
|
Methodology: Multi-Analyte Fluorescent Detection
Performed: Sun-Sat Reported: 1-2 days |
| Specimen Required: | |
|
Collect: One 4 mL SST.
Transport: 1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.15 mL serum at 2-8°C. Remarks: Separate serum from cells ASAP. Unacceptable Conditions: Plasma, urine, or other body fluids. Severely lipemic, contaminated, or hemolyzed specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles) |
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| Reference Interval: |
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Negative: 19 AU/mL or less Equivocal: 20-25 AU/mL Positive: 26 AU/mL or greater |
| Interpretive Data: | |
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Approximately 90% of patients with a P-ANCA pattern by IFA have antibodies specific for MPO. Approximately 85% of patients with a C-ANCA pattern by IFA have antibodies specific for PR3. |
| CPT Code(s): | |
| 83516 |