Quantitative bronchial challenge tests with wheat flour dust administered by spinhaler: comparison with aqueous wheat flour extract inhalation
- R Merget 1, M Heger , A Globisch , K Rasche , A Gillissen , A Gebler , G Schultze-Werninghaus , M Krieg
- R Merget 1, M Heger , A Globisch
- 1Department of Internal Medicine, University Hospital Bergmann-sheil, Germany.
- 0Department of Internal Medicine, University Hospital Bergmann-sheil, Germany.
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View abstract on PubMed
Summary
This summary is machine-generated.Wheat flour dust inhalation via Spinhaler capsules is a more accurate diagnostic tool for bakers' asthma than using a wheat flour extract. This method offers higher specificity for diagnosing occupational asthma in bakers.
Area Of Science
- Occupational Medicine
- Pulmonology
- Allergology
Background
- Bakers' asthma diagnosis often involves quantitative bronchial challenge tests using flour dust.
- Sophisticated equipment is typically used for flour inhalation during these tests.
Purpose Of The Study
- To evaluate the diagnostic accuracy of bronchial challenge tests using flour dust from Spinhaler capsules.
- To compare this Spinhaler method with tests using a commercial wheat flour extract.
Main Methods
- 34 bakers with occupational asthma symptoms and 10 controls underwent bronchial hyperresponsiveness assessment.
- Subjects inhaled either wheat flour extract at various concentrations or wheat flour dust via Spinhaler capsules.
- Skin prick tests, total serum IgE, and specific IgE to wheat flour were also measured.
Main Results
- Wheat flour dust inhalation via Spinhaler demonstrated higher specificity (1.0) compared to the extract (0.7).
- Sensitivity was comparable when considering subjects with positive skin tests (0.65 for both methods).
- Both methods were found to be safe for patients.
Conclusions
- Bronchial challenge tests with wheat flour dust inhaled from Spinhaler capsules show superior validity compared to wheat flour extract tests.
- The Spinhaler method's higher specificity is advantageous for confirming diagnoses of bakers' asthma.
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