A controlled randomized study having 70 individuals with COPD was conducted. Before the treatment began, all participants signed a permission after being informed about the study's specifics and their rights as patients. The Ethics Committee Board of Cairo University's Faculty of Physical Therapy authorized this study (P.T.REC/012/002208). The research was done in accordance with the Helsinki 0 male COPD patients aged 40-60 years, recruited from Kasr Al Ainy Hospital, Cairo University. Participants were diagnosed with moderate to severe COPD and were randomly assigned into two groups: Group A received Acapella® therapy alongside standard chest physiotherapy, and Group B received Lung Flute® therapy with the same physiotherapy protocol. Both groups underwent interventions every other day for eight weeks. Outcomes were assessed using pulmonary function tests (PFTs), the six-minute walk test (6MWT), and the VQ11 quality-of-life questionnaire.
