Flutter valve™One week before the testing protocol, each subject visited the laboratory for an introductory session to become familiar with the equipment and the procedures. Individuals with chest pain, acute hemoptysis, recent history of rib fracture or pneumothorax (less than 1 year), respiratory infection in the 4 weeks preceding the measurements (diagnosed by the medical staff according to clinical, laboratorial and radiological criteria), asthma, CF, and daily sputum production lower than 25 mL were excluded (the subjects collected their daily sputum production during 24 hours prior to the experiments).According to the Helsinki Declaration, our Institutional Ethics Committee approved the study, and all subjects signed the informed consent term. The subjects were not under any physiotherapeutic treatment and were naive about the procedures employed in this investigation. SubjectsParticipants were recruited among patients with clinical and high‐resolution computerized tomography diagnoses of bronchiectasis, from the Pneumology Department, University Hospital, Federal University of Rio de Janeiro. The experimental sequence is shown in Figure. Respiratory mechanics was assessed before and after each intervention, in order to evaluate the effectiveness of the Flutter Valve™ removal of tracheobronchial sputum.
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