Efforts aimed at mucus clearance by creating a differential airflow rate led to the development of:

Question

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Efforts aimed at mucus clearance by creating a differential airflow rate led to the development of high-frequency chest wall oscillation system. This system uses high-frequency air pulses to create a vibration that helps to loosen and move mucus trapped in the lungs. Low-frequency chest wall systems, while also used for airway clearance, do not utilize air pulses, but instead rely on chest wall oscillations to achieve mucus clearance.

Efforts Aimed at Mucus Clearance by Creating a Differential Airflow