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Evaluation of an innovative pediatric isolation (PI) bed using fluid dynamics simulation and aerosol isolation efficacy
Building Simulation ( IF 5.5 ) Pub Date : 2021-03-04 , DOI: 10.1007/s12273-021-0761-3
Tiantian Liu 1 , Yubing Guo 2 , Xiaotang Hao 1 , Mei Wang 1 , Shicong He 2 , Zhengshi Lin 2 , Rong Zhou 2
Affiliation  

Airborne transmission is an important mechanism of spread for both viruses and bacteria in hospitals, with nosocomial infections putting a great burden on public health. In this study, we designed and manufactured a bed for pediatric clinic consultation rooms providing air isolation to protect patients and medical personnel from pathogen transmission. The pediatric isolation bed has several primary efficiency filters and a high-efficiency particulate air filter in the bedside unit. The air circulation between inlet and outlet forms negative pressure to remove the patient’s exhaled air timeously and effectively. A computational fluid dynamics model was used to calculate the speed of the airflow and the angle of sampler. Following this, we conducted purification experiments using cigarette smoke, Staphylococcus albus (S. albus) and human adenovirus type 5 (HAdV-5) to demonstrate the isolation efficacy. The results showed that the patient’s head should be placed as close to the air inlet hood as possible, and an air intake wind speed of 0.86 m/s was effective. The isolation efficacy of the pediatric isolation bed was demonstrated by computational fluid dynamics technology. The isolation efficiency against cigarette smoke exceeded 91.8%, and against S. albus was greater than 99.8%, while the isolation efficiency against HAdV-5 was 100%. The pediatric isolation bed could be used where isolation wards are unavailable, such as in intensive care units and primary clinical settings, to control hospital acquired infections.



中文翻译:

使用流体动力学模拟和气溶胶隔离效果评估创新的儿科隔离 (PI) 床

空气传播是病毒和细菌在医院传播的重要机制,医院感染给公共卫生带来巨大负担。在这项研究中,我们为儿科门诊会诊室设计并制造了一张床,提供空气隔离,以保护患者和医务人员免受病原体传播。儿科隔离床在床边单元中有几个初级效率过滤器和一个高效微粒空气过滤器。进出口之间的空气循环形成负压,及时有效地排出患者呼出的空气。计算流体动力学模型用于计算气流的速度和采样器的角度。在此之后,我们使用香烟烟雾进行了净化实验,白色葡萄球菌 (S. albus)和人腺病毒 5 型 (HAdV-5) 证明分离效果。结果表明,患者头部应尽可能靠近进气罩,0.86 m/s的进气风速是有效的。计算流体动力学技术证明了儿科隔离床的隔离效果。对香烟烟雾的隔离效率超过91.8%,对S. albus的隔离效率大于99.8%,而对HAdV-5的隔离效率为100%。儿科隔离床可用于没有隔离病房的地方,例如重症监护室和初级临床环境,以控制医院获得性感染。

更新日期:2021-03-04
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