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[Bronchial asthma caused by occupational sulfite exposure]
1Al.Lergo Centre, Barcelona.
Allergologia Et Immunopathologia
|November 1, 1993
Summary
Occupational exposure to sodium bisulfite can trigger asthma attacks. Oral provocation tests with sodium bisulfite in an acid medium effectively diagnosed the patient's sulfite-induced bronchospasm.
Area of Science:
- Occupational Medicine
- Allergy and Immunology
- Pulmonology
Background:
- A patient with a history of asthma and allergic rhinitis experienced recurrent bronchospasm.
- Occupational exposure to sodium bisulfite was identified as a potential trigger.
Observation:
- Standard skin tests for sodium metabisulfite were negative.
- A simple blind oral provocation test with sodium metabisulfite (50 mg) in an acid medium induced significant bronchial and nasal symptoms.
- Pulmonary function tests showed a decrease of over 20% in vital capacity (VC), forced expiratory volume in 1 second (FEV1), and peak expiratory flow (PEF).
Findings:
- The oral provocation test confirmed sulfite-induced asthma.
- Eliminating workplace exposure to sodium bisulfite resolved the patient's bronchospasm episodes.
Implications:
- Oral provocation with sulfites in an acid medium is a valuable diagnostic tool for occupational sulfite-induced asthma.
- Identifying and removing workplace triggers is crucial for managing occupational asthma.