In the seriously ill, the paralysed and the elderly patient, many factors such as poor skin blood flow, malnutrition and immobility predispose to a high incidence of decubitus ulcers or pressure sores. The development of a sore is a complex process, but skin distortion and localized pressure are considered important precipitating factors. Over the last two decades manufacturers have produced a large variety of support surfaces claiming to be effective in prevention as well as treatment of sores. However, a review of available literature shows that none of the test methods used by different investigators has provided a comprehensive means of determining which device is appropriate for a particular patient.
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