Experience at Rancho Los Amigos Hospital With Devices and Techniques to Prevent Pressure Sores
The projected area of support of a prostrate human being, when divided into his body weight, yields an average pressure of around so mm Hg. This is below the 30-35 mm Hg usually accepted as necessary to cause ischaemia.
The projected area of support, including the feet (but not the back) of a sitting person when divided into his body weight, yields an average pressure of about 50 mm Hg. This is above the 30-35 mm Hg ‘ischaemic pressure’.
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