Expiratory Flow Accelerator (Efa) vs Efa + High Flow in Chronic COPD and Bronchiectasis

After being informed about the study and potential risks, all patients giving written informed consent will undergo a 13-weeks trial period: 6 weeks of one technology (EFA / EFA+ HIGH FLOW), 1- wash out week and 6- weeks of the other technology in a cross over randomized trial.