The effect of position and mattress on interface pressure

The aim of this investigation was to determine which positions resulted in the lowest pressures to the skin of persons lying in bed. Pressures were recorded in 10 different lying positions on 2 mattresses in 62 healthy volunteers. The study revealed that the 30° semi-Fowler position and the prone position resulted in the lowest interface pressures. The 30° laterally inclined position had lower pressure readings than the 90° side lying position; 90° side lying position gives the highest pressure readings and thus should be avoided. A Tempur® polyethylene-urcthane mattress reduces interface pressures by 20 to 30 X% in comparison to a standard hospital mattress (12-cm-thick cold foam).