Bed sores, a common problem among immobile patients occur as a result of continuous sweating due to increase in skin to bed surface temperature in patients lying on same posture for prolonged period. If left untreated, the skin can break open and become infected. Currently adopted methods for bed sores prevention include: use of two hourly flip chat for repositioning patient or use of air fluidized beds. However, the setbacks of these preventive measures include either use of costly equipment or wastage of human resources. This paper introduces an intelligent low cost FPGA based anti-sweating system for bed sores prevention in a clinical environment. The developed system consists of bed surface implanted temperature sensors interfaced with an FPGA chip for sensing the temperature change in patient’s skin to bed surface. Based on the temperature change, the FPGA chip select the - mode (heater/cooler) and speed of the fan module. Furthermore, an alarm module was implemented to alert the nurse to reposition the patient only if patient’s skin to bed surface temperature exceeds a predefined threshold thereby saving human resources. By integrating the whole system into a single FPGA chip, we were able to build a low cost compact system without sacrificing processing power and flexibility.

中文翻译：

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基于FPGA的智能防汗系统，用于临床环境中的褥疮预防

床褥疮是无法移动的患者中的一个普遍问题，这是由于长时间以相同姿势躺下的患者皮肤到床表面温度升高导致持续出汗而导致的。如果不及时治疗，皮肤会破裂并被感染。当前采用的预防褥疮的方法包括：使用每小时两次的翻转聊天来重新定位患者或使用空气流化床。但是，这些预防措施的挫折包括使用昂贵的设备或浪费人力资源。本文介绍了一种用于临床环境中预防褥疮的智能低成本基于FPGA的防汗系统。所开发的系统包括植入床表面的温度传感器，该传感器与FPGA芯片接口，用于感应患者皮肤至床表面的温度变化。根据温度变化，FPGA芯片选择-模式（加热器/冷却器）和风扇模块的速度。此外，实施了警报模块，仅当患者的皮肤至病床表面温度超过预定阈值时，才提醒护士重新放置患者，从而节省了人力资源。通过将整个系统集成到单个FPGA芯片中，我们能够构建一个低成本的紧凑型系统，而不会牺牲处理能力和灵活性。