It's the outward pressure.
Clinically speaking, dyspnea mostly refers to difficulty in exhaling. Due to the inability to breathe out, carbon dioxide is retained in the lungs. In order to alleviate the gas exchange in the alveoli, the high load pressure in the lungs is caused. Therefore, negative pressure should be used to assist exhalation and increase the exhalation volume.
30-900 Pa continuously adjustable
At a frequency of 3,000 times per minute, the air pump relaxes to form airflow. This high-speed intermittent negative pressure airflow can change the airflow from laminar flow to vortex in the pipes. You can cause flushing and rhythmic massage of the airway to reduce or relieve the spasm of the airway and stimulate ciliary movement.
Instead of using an inflatable chest vest that applies repeated chest wall compression, the Airway Clearance Device uses negative pressure pulsating airflow in a compact system designed to support patient comfort and practical clinical use.
This flushing can separate the sputum in the airway from the airway. With this negative pressure, the sputum moves faster in the airway, ultimately solving airway spasm and sputum blockage, sucking hypoxia, and relieving coughing and wheezing.
The vortex can cause flushing and rhythmic massage of the airway to reduce or relieve the spasm of the airway and stimulate ciliary movement.
