Patent ID: 6505368
Filing Date: 2003-01-14
Classification: A61G

Abstract:
A mattress assembly for supporting a patient, the mattress assembly comprising;a body support portion having a head end, a foot end, and a knee support portion located between the head end and the foot end under the patient's knees; a bottom cover portion located below the body support portion; and a top coverlet located above the body support portion, the top coverlet being formed from a liquid impermeable material, the body support portion having a first air zone extending from the head end to the knee support portion and a second air zone extending from the knee support portion to the foot end, and a control module coupled to the first and second air zones, the control module being configured to supply air to the first and second air zones to maintain the first air zone at a substantially constant first pressure and to maintain the second air zone at a substantially constant second pressure, the second pressure being less than the first pressure to provide reduced pressure on a patient's calves and feet located on the second air zone, the top coverlet including a top surface and a side wall extending downwardly from the top surface, the side wall being configured to extend over an outer peripheral edge of the body support portion and under a bottom surface of the body support portion, the top coverlet including an elastic cord coupled to the side wall to hold the side wall of the coverlet under the bottom surface of the body support portion.