The value of bronchodilator response in FEV1 and FeNO for differentiating between chronic respiratory diseases: an observational study.

ABSTRACT:

Background

There is no uniform standard for a strongly positive bronchodilation test (BDT) result. In addition, the role of bronchodilator response in differentiating between asthma, chronic obstructive pulmonary disease (COPD), and asthma-COPD overlap (ACO) in patients with a positive BDT result is unclear. We explored a simplified standard of a strongly positive BDT result and whether bronchodilator response combined with fractional exhaled nitric oxide (FeNO) can differentiate between asthma, COPD, and ACO in patients with a positive BDT result.

Methods

Three standards of a strongly positive BDT result, which were, respectively, defined as post-bronchodilator forced expiratory volume in 1-s responses (ΔFEV₁) increasing by at least 400 mL + 15% (standard I), 400

SUBMITTER: Gong Z 

PROVIDER: S-EPMC10840153 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature