The prevention of the pressure sore is a serious problem for patients with spinal cord injuries (SCI). It is the most important for SCI patients to relieve or reduce the buttock pressure for prevention of pressure sore. Many kinds of pressure-relieving cushions and mattress have been developed to distribute the weight evenly and widely. We previously measured the buttock pressure of SCI patients using Tekscan pressure measurement system to evaluate the pressure distribution of the wheelchair cushion. In this study, we measure the pressure distribution of the air cushion after the adjustment to the atmosphere pressure without load on the air cushion. Then we propose the evaluating system for the adjustment of the air cushion that is based on the atmosphere pressure.
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