Background: Patients with neuromuscular disease develop progressively inspiratory and expiratory muscle weakness and can also present impaired glottic function. Airway obstruction is the result of secretion retention and it is known that respiratory insufficiency is the most common cause of death in this population. Therefore, it is important to main clear airways. At some point, the active participation of the patient is not possible due to muscle weakness and other options must be explored. High-frequency...