The Graham-Field AltaDyne is an economical and portable air floatation system which offers both alternating pressure and low air loss. It is suitable for use in the prevention and treatment of Stages 1 and 2 of pressure ulcers. The non-alternating, zoned (sacral region) low-air-loss can be selected by simply pressing the “static” switch. Quick CPR deflation is accomplished by simply disconnecting the quick-connect hose couplings from the control unit.