Chronic Obstructive Pulmonary Disease (COPD) Clinical Trial
Official title:
Ventilation-drive Coupling to Evaluate The Efficacy of Inhaled Bronchodilators in Patients With Chronic Obstructive Pulmonary Disease
Chronic Obstructive Pulmonary Disease (COPD) is a major cause of chronic morbidity,
mortality and disability throughout the world, leading to a heavy social and economic
burden.Bronchodilators, the most commonly used drugs in COPD patients, have been shown to
reduce dyspnea, improve exercise tolerance and improve health status. However,conventional
lung function parameters such as forced vital capacity (FVC) and forced expiratory volume in
one second (FEV1) frequently fail to detect significant functional responses to
bronchodilators in patients with chronic airflow obstruction. It is necessary for clinical
and scientific reasons to develop a new tool to objectively assess the effect of different
treatments including bronchodilator on COPD. Our previous study showed that
Ventilation-drive coupling may be more sensitive and accurate to evaluate the efficacy of
inhaled bronchodilators in patients with COPD because it could better reflect the
pathological and physiological characteristics of COPD.
Based on the above conclusion, the present study were performed using the experimental
methods of placebo and self-controlled. We aimd to explore the value of ventilation-drive
coupling in evaluating the efficacy of bronchodilators on COPD and provide a reasonable
basis for the clinical application of this index.
Patients were randomly assigned to one of two intervention groups:
1. Group A: Patients inhaled placebo, ipratropium 80μg, salbutamol 400 μg in sequence;
2. Group B: Patients inhaled placebo, salbutamol 400μg, ipratropium 80 μg in sequence.
The data were collected in 30 minutes after patients inhaled placebo,in 30 minutes after
ipratropium and in 15 minutes after salbutamol.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Diagnostic
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