ArticleInternational journal of chronic obstructive pulmonary disease2020
Role of the Bronchodilator Test Defined by the Forced Vital Capacity in Chronic Obstructive Pulmonary Disease Phenotyping.
Article in International journal of chronic obstructive pulmonary disease, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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1 citing paper in PubMed, 2 citations in OpenAlex.
- [Effects of type 2 inflammation on bronchodilator responsiveness of large and small airways in chronic obstructive pulmonary disease].Nan fang yi ke da xue xue bao = Journal of Southern Medical University · 2024Article
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Authors and funding
4 authors at 3 institutions in 1 country.
Funding
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Abstract
Purpose: In clinical practice, some chronic obstructive pulmonary disease (COPD) patients experienced a remarkable increase in forced vital capacity (FVC) after bronchodilator administration, whereas forced expiratory volume in the first second (FEV1) remains substantially unchanged. We assume this may relate to airway inflammatory type. We aim to analyze the clinical characteristics and explore the usefulness of the bronchodilator test, especially FVC, in this new COPD phenotype. Patients and Methods: A total of 346 COPD patients with exacerbation who underwent bronchodilator tests, fractional exhaled nitric oxide (FeNO) measurements and blood eosinophil counts were analyzed. The characteristics, FeNO levels, and blood eosinophil counts were compared between patients with and without significant bronchodilator responsiveness in terms of FVC. Results: Patients with significant FVC responsiveness displayed poorer lung function and higher FeNO levels compared with those without considerable FVC responsiveness (Z= -5.042 to -0.375, p=0.000-0.022). There is a discernible linear relationship between FeNO levels and FVC responsiveness to bronchodilator use (r=0.251, P=0.001). The application of bronchodilator responsiveness of FVC for detecting high FeNO levels in COPD patients exhibited relatively high sensitivity (61.8%) and specificity (86.7%). Conclusion: We demonstrated that COPD patients with significant FVC responsiveness had higher FeNO levels than non-responders and established a simple method for detecting high FeNO values. FVC responders may be identified as a separate group of COPD patients.
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