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Respiratory failure in ANCA-associated vasculitis
J C ter Maaten1, C F Franssen, R O Gans
1Department of Medicine, Catharina Hospital, Eindhoven, The Netherlands.
Chest
|August 1, 1996
Summary
Respiratory failure affects nearly one in nine patients with ANCA-associated pulmonary disease, often presenting as pulmonary hemorrhage. Early diagnosis of vasculitis is crucial for managing this severe condition.
Area of Science:
- Rheumatology
- Pulmonology
- Nephrology
Background:
- Antineutrophil cytoplasmic autoantibodies (ANCA) are associated with systemic vasculitis.
- Pulmonary involvement is a serious complication in ANCA-positive patients.
- Understanding the clinical course of respiratory failure in ANCA-positive individuals is critical.
Purpose of the Study:
- To determine the prevalence and clinical features of respiratory failure in ANCA-positive patients.
- To describe the course and outcomes of respiratory failure in this cohort.
- To identify diagnostic markers for ANCA-associated vasculitis.
Main Methods:
- Case-series analysis of 220 ANCA-positive patients over an 8-year period.
- Inclusion criteria: positive ANCA by immunofluorescence and ELISA, suspected vasculitis/glomerulonephritis.
- Data collected on clinical manifestations, diagnostic tests, and patient outcomes.
Main Results:
- Pulmonary involvement was observed in 62 patients; 9 developed acute respiratory failure.
- Seven of these nine cases were attributed to ANCA-associated vasculitis, presenting with pulmonary hemorrhage and infiltrates.
- High mortality was noted due to respiratory failure, infections, and renal failure.
Conclusions:
- Acute respiratory failure occurs in approximately 11% of ANCA-associated pulmonary disease cases.
- Pulmonary infiltrates and hemoptysis are common presenting symptoms of vasculitis.
- Urinary sediment analysis and ANCA target antigen identification aid in diagnosing vasculitis.