|
**Overview**: Vasculitis Panel**Introduction**: The Vasculitis Panel is a diagnostic tool designed for vasculitis screening using serum samples. In India, systemic vasculitides (ANCA-associated, small/medium vessel) affect ~10-20 per million annually, with granulomatosis with polyangiitis and microscopic polyangiitis common, causing renal failure, pulmonary hemorrhage, or skin ulcers if untreated. High morbidity from under-testing in rural/low-SES patients with fever, hematuria, or purpura, limited autoantibody labs, delayed immunosuppression leading to organ damage or death. Per rheumatology practices aligned with ICMR and Indian Rheumatology Association guidelines, the test employs immunoassay for ANCA (c-ANCA/p-ANCA), ANA, anti-dsDNA, rheumatoid factor, and CRP over 3â€"5 days with high accuracy, valuable for ANCA-associated vasculitis diagnosis (c-ANCA/PR3 for GPA, p-ANCA/MPO for MPA). This diagnostic falls under autoimmune screening and targets patients with systemic symptoms, renal involvement, or lung disease, addressing accurate detection to guide cyclophosphamide/rituximab or steroids. With elevated morbidity due to underdiagnosis, the test supports public health efforts by enabling precise vasculitis profiling and reducing mortality. Its serum-based approach ensures reliable autoantibody/inflammatory assessment.**Other Names**: Vasculitis Pnl.**FDA Status**: FDA approved, CLIA certified for immunology, compliant with 2025 standards.**Historical Milestone**: ANCA + ANA panel standard in vasculitis workup; in India, expanding in rheumatology/nephrology.**Purpose**: The test assesses 5 parameters including ANCA to guide vasculitis screening, detect autoimmune markers, inform immunosuppression.**Test Parameters**: 1. ANCA (c-ANCA, p-ANCA), 2. ANA, 3. Anti-dsDNA, 4. Rheumatoid Factor, 5. CRP.**Pretest Condition**: No fasting required; patients should have systemic symptoms.**Specimen**: 3 mL serum in 1 SST, transported within specified times to maintain sample viability.**Sample Stability at Room Temperature**: 8 hours with proper handling to preserve analyte integrity, ensuring reliable test performance.**Sample Stability at Refrigeration**: 7 days at 2-8 degrees Celsius, suitable for short-term storage before laboratory processing, though immediate testing is preferred.**Sample Stability at Frozen**: 6 months at -20 degrees Celsius, allowing long-term storage for retesting, though freezing may affect some analytes.**Medical History**: Patients should provide details on fever, hematuria, rash.**Consent**: Written informed consent is required, detailing the test's purpose, potential risks of undetected vasculitis including renal failure, benefits of screening, and minimal discomfort from venipuncture.**Procedural Considerations**: The test involves sample processing using immunoassay by trained personnel to ensure sterile technique, avoid hemolysis, and interpret results within 3â€"5 days using provided controls. Laboratories must maintain a controlled environment, adhere to quality assurance protocols.**Factors Affecting Result Accuracy**: Delays beyond stability periods, improper storage conditions, hemolysis can affect results. Correlation with clinical evaluation or additional testing is recommended to confirm findings.**Clinical Significance**: Positive c-ANCA/PR3 indicates GPA; p-ANCA/MPO MPA, necessitating specialist input.**Specialist Consultation**: Rheumatologists or nephrologists should be consulted for management.**Additional Supporting Tests**: Biopsy, ANCA specificity (MPO/PR3) for confirmation.**Test Limitations**: ANCA negative vasculitis possible; comprehensive approach required.**References**: Indian Journal of Rheumatology 2024, Vasculitis Studies India 2023. |
