what causes aspiration
Aspiration may occur under several circumstances. 1  Before the swallowing reflex is triggered, when the airway has not elevated or closed. 2  During the swallowing if the laryngeal valves are not functioning adequately. 3  After the swallow when the larynx lowers and opens for inhalation.
This is known as a âsilent aspiration.â Frequent aspiration can cause. damage to the lungs if it is not treated. There are several ways to tell. if someone has dysphagia or aspiration problems. The personâs. doctor will order tests that are best for each person.