Anti decubitus mattress has two basic functions: one is to better disperse pressure, avoid pressure concentration and continuous pressure, and promote blood circulation. Second, the load-bearing interface has good ventilation and heat dissipation functions.

The anti decubitus mattress is made of non-absorbent fiber fabric, sweat stains and other liquids are not easy to adhere to the airbag, and it is easy to wipe. The water-repellent treatment breathable cover can be strengthened to prevent urine from seeping down. A well-designed air mattress can also adjust the pressure index suitable for the individual according to the individual's weight.

The function of anti decubitus mattress is to increase the contact surface between the human body and the hard surface through soft and elastic materials, and reduce the pressure per unit area, so that the weight of the human body will not be excessively concentrated on the protruding part of the bone, so as to achieve the purpose of preventing pressure. That is to say, decubitus air cushion is a medical nursing mattress used to prevent and slow down decubitus diseases. Terminal patients, so anti decubitus mattress cannot treat bedsores.