Efficacy of a Respiratory Rehabilitation Valve in Chronic Obstructive Pulmonary Disease with Airway Mucus Hypersecretion Phenotype
Objective To compare the clinical effects of a respiratory rehabilitation valve and chest physical training on pulmo-nary rehabilitation and expectoration in patients with stable chronic obstructive pulmonary disease(COPD).Methods Fifty-eight pa-tients with stable COPD were randomly divided into two groups.The experimental group(n=32)received respiratory rehabilitation valve training,while the control group(n=26)underwent active cough training.Both groups received expectoration intervention train-ing for three months.The changes in lung function indices,cough and expectoration symptoms,and quality of life were compared be-tween the two groups before and after the intervention.Results The experimental group showed significant improvements in lung function indices(FEV1,FVC,and FEV1/FVC%)compared to the control group post-training(P<0.05).Improvements were also observed in symptoms of cough and expectoration,mMRC,COPD Assessment Test(CAT),Clinical COPD Questionnaire(CCQ),St George's Respiratory Questionnaire(SGRQ),Borg Dyspnea Score(Borg),and 6-minute walking distance(6MWD).The improvements in mMRC grade,CAT score,and 6MWD were significantly higher in the experimental group than in the control group(P<0.05).Conclusion Basic treatment of COPD,supplemented by lung rehabilitation and expectoration training,can improve the symptoms of cough and expectoration in patients with stable COPD.Respiratory rehabilitation valve training can enhance some pulmonary function in-dices,quality of life,and exercise endurance in patients with stable COPD,warranting further study and promotion.