i. Patients who do not meet the criteria for the use of speaking valve (i.e. unconscious and/or comatose patients, patients who require 24-hour inflated tracheostomy tube cuff due to inadequate ventilation, foam-filled tracheostomy tube, severe airway obstruction, unmanageable thick secretions, severe risk for aspiration, severely reduced lung elasticity, and not intended for use with endotracheal tubes).