A breath sound analysis in children with cough variant asthma

Abstract

BACKGROUND: Cough variant asthma (CVA) is characterized by a chronic cough and bronchial hyperresponsiveness without confirmation of wheezing. Using a breath sound analyzer, we evaluate the characteristics of breath sound in children with CVA. METHODS: agonist inhalation. A spirogram and/or forced oscillation technique were performed in all subjects. RESULTS: agonist inhalation. CONCLUSIONS: agonist inhalation. Changes in the spectrum curve indices also indicated the bronchial reversibility. These results may suggest the characteristics of CVA in children.