【摘要】 针对现有气囊型防压疮床垫在压力分布、调节频次及舒适性等方面存在的问题，设计了一种采用时间-压力耦合控制策略的防压疮床垫。该床垫采用双层热塑性聚氨酯气囊和聚氨酯海绵及分级式多通道气路配置方案，实现了床垫多气囊的局部自动压力调节和整体位姿控制。基于Sigmoid损伤阈值曲线及函数拟合，提出了时间-压力有效平衡防压疮控制方法。试验结果表明：时间-压力控制策略相比单压力控制、单时间控制策略，气囊调整次数平均值从158次减至18次，床垫的舒适度评分平均值从57分提升至82分，提出的时间-压力控制策略在保证防压疮效果的同时，可有效减少床垫局部压力调整次数，提升患者感受。更多还原

【Abstract】 Currently, the airbag mattress of pressure-ulcer prevention is far from perfect in terms of pressure distribution, adjustment frequency, and comfort. In this article, efforts are made to design a mattress of pressure-ulcer prevention with the help of the time-pressure coupling control strategy. The mattress adopts a double-layer thermoplastic polyurethane(TPU) airbag and polyurethane sponge, along with a graded multi-channel air passage configuration scheme, thus ensuring local automatic pressure adjustment and overall posture control of multiple airbags. Based on the Sigmoid injury threshold curve and function fitting, a time-pressure control method is proposed, which is characterized by effective balance and pressure-ulcer prevention. The experiment shows that the time-pressure control strategy is superior to the single-pressure control and single-time control strategies. The average number of airbag adjustment reduces from 158 to 18, and the score of comfort improves from an average of 57 to 82. The time-pressure control strategy effectively reduces the number of local pressure adjustment and enhances the patients’ comfort, while ensuring the effect of pressure-ulcer prevention.更多还原