The RK800 Series Air Pulse Oscillation Airway Clearance System mainly uses high-frequency oscillating airflow to repeatedly and gently pat the patient's chest, causing viscous secretions in the respiratory tract to resonate, aggregate, and detach. Under the action of directional drainage force, the liquefied and detached secretions are expelled from the body in the selected direction (e.g., from bronchioles to bronchi to the trachea), thereby achieving the therapeutic effect.