Uses gravity to help remove lung secretions, e.g., mucus. The person is tilted by lowering the top of the bed by about 45cm and then placed in different positions for short periods.
Dhaka's air quality 3rd worst in the world this morning
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Dhaka's air continues to be unhealthy as it ranked 3rd on the list of
cities worldwide with the worst air quality with an AQI score of 164 at
8:59am this m...
2 hours ago
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