“…28,29 However, for patients requiring MV, sputum production may be increased and the mucociliary transport system impaired caused by the presence of an artificial airway (including an inflated cuff tube), airway dehydration/delivery of relatively dry gases, infection, loss of cilia, change in cilia movement patterns, and cough inefficiency. [30][31][32][33][34][35][36][37][38] Also, patient positioning, muscular weakness, and immobility may further promote sputum retention due to gravitational forces, decreased lung ventilation, and cough strength. 39 Therefore, physiotherapy treatments to clear retained secretions are an essential component of the management of these patients in ICU.…”