Chinese air mattress

Mattress idea: A device that inflates the mattress at first, and then the device continuously inhales and expels air from the mattress.

It is used for bedridden people to prevent bedsores.

It moves air under the patient so that it does the same thing as turning the person over.

There should be another foam mattress under the mattress.

It is preferable to place a cotton sheet over the air mattress to prevent chafing