Response to Bronchodilator and Clinical, Pathophysiological Features in Patients with Nonasthmatic Eosinophilic Bronchitis

AbstractIntroductionWhether non ‐asthmatic eosinophilic bronchitis (NAEB) shows response to bronchodilator (RB) remains unclear.ObjectivesTo investigate the RB and its relationship with clinical and pathophysiological features in NAEB.MethodsFifty ‐one patients with NAEB were assigned in a 2:1 ratio to receive oral bambuterol hydrochloride (n=34, 10mg, once daily, for 3 days) or matched placebo (n=17) randomly, of whom 48 patients (32 with bronchodilator and 16 with placebo) completed the study. Sputum induction, spirometry and cough reflex sensitivity were measured. RB was considered when cough VAS score decreased 30% or more after treatment. Cough reflex sensitivity was defined as the lowest concentration of capsaicin inducing 5 coughings or more (C5), and presented as Log C5.ResultsThe responsive rate of patients with bronchodilator was significantly higher than that with placebo (34.4% vs 6.3%, p
Source: The Clinical Respiratory Journal - Category: Respiratory Medicine Authors: Tags: ORIGINAL ARTICLE Source Type: research

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