Mattresses and Accessories - Drive, Med Aire Plus Defined Perimeter Low Air Loss Mattress Replacement System, with Low Pressure Alarm, 8" : Ideal for use in hospitals, nursing homes and home care this mattress helps to keep the patient cool and speed recovery. The product is designed to be used in the prevention, treatment and management of Pressure Ulcers. This mattress has a total of 20 air bladders and has specially designed air supply manifolds which quietly operate alternating pressure and air loss systems, while maintaining firm "Defined Perimeter". Cell-on-Cell design prevents "Bottoming Out" in the event of power failure. The LED and Audible alarm activates when mattress pressure falls below 10 mmHg. Spring lined tubing prevents kinks and helps maintain airflow. Quick fill adapter comes standard and CPR valves provide fast (20-Second) deflation.