Ensuring good indoor air quality is critical in hospitals. An environment free from airborne particles can prevent the spread of various diseases and improve patient health. In this study, the efficiency of a personalised ventilation supply system (PSS) and personalised ventilation extraction system (PES) for diluting and removing contaminants exhaled by a patient in a hospital bed was evaluated. These systems, which were integrated into the head and foot of a hospital bed, were combined with three general ventilation strategies in the room. Fifteen ventilation strategies were analysed experimentally. Two breathing thermal manikins (BTMs) were used to simulate a patient and health worker in a hospital. The breathing of each BTM was controlled by the patient (source) generating particles that can increase the risk of infection in a healthy person (target). Experimental results show that using a PES combined with general ventilation of the room reduces the exposure of the target manikin compared to general ventilation strategies alone. However, no marked improvement was observed when the PSS was activated. The reduction in exposure to the target manikin was considerable when the PES was located at the foot of the hospital bed, which is the preferred option for integrating personalised systems in a hospital bed.

中文翻译：

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使用病房内的通用和个性化通风系统对空气中呼出污染物的暴露进行实验评估

确保良好的室内空气质量对于医院至关重要。没有空气颗粒的环境可以防止各种疾病的传播并改善患者的健康。在这项研究中，评估了个性化通气供应系统（PSS）和个性化通气抽取系统（PES）稀释和去除病床上患者呼出污染物的效率。这些系统集成在医院病床的床头和床脚中，并与房间内的三种常规通风策略相结合。对十五种通气策略进行了实验分析。使用两个呼吸热人体模型 (BTM) 来模拟医院中的患者和医护人员。每个 BTM 的呼吸均由患者（源）控制，产生的颗粒会增加健康人（目标）的感染风险。实验结果表明，与单独的一般通风策略相比，使用 PES 结合房间的一般通风可以减少目标模型的暴露。然而，当 PSS 激活时，没有观察到明显的改善。当 PES 位于医院床脚时，与目标人体模型的接触大大减少，这是在医院病床上集成个性化系统的首选。