Quantitative Method for Comparative Assessment of Particle Removal Efficiency of Fabric Masks as Alternatives to Standard Surgical Masks for PPE
Quantitative Method for Comparative Assessment of Particle Removal Efficiency of Fabric Masks as Alternatives to Standard Surgical Masks for PPE
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DOI：
10.1016/j.matt.2020.07.006
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发表时间：
2020-09-02
期刊：
影响因子：
18.9
通讯作者：
Fernandez, Loretta A.
中科院分区：
文献类型：
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作者：
Mueller, Amy V.;Eden, Matthew J.;Fernandez, Loretta A.
为应对COVID-19大流行，人们正在使用布口罩来控制病毒的传播，但这些宽松口罩的效果尚不清楚。本文修改了通常用于评估贴身呼吸器的工具和方法，以量化社区生产和商业生产的织物口罩作为个人防护设备的功效。两个粒子计数器同时对环境空气和口罩内的空气进行采样；口罩的性能是通过平均颗粒去除效率和统计变异性来评估的，当按照设计佩戴并带有尼龙涂层时，独立评估适合度和材料。按照设计佩戴时，商用外科口罩和布制口罩的效果差别很大（分别为53%-75%和28%-91%）。大多数外科手术式口罩都增加了尼龙外层，这表明不适合。这种快速测试方法使用广泛可用的硬件，只需要从收集的数据中进行少量计算，并提供掩膜性能的整体和方面评估。
In response to the COVID-19 pandemic, cloth masks are being used to control the spread of virus, but the efficacy of these loose-fitting masks is not well known. Here, tools and methods typically used to assess tight-fitting respirators were modified to quantify the efficacy of community-produced and commercially produced fabric masks as personal protective equipment. Two particle counters concurrently sample ambient air and air inside the masks; mask performance is evaluated by mean particle removal efficiency and statistical variabilitywhen worn as designed and with a nylon overlayer, to independently assess fit and material. Worn as designed, both commercial surgical masks and cloth masks had widely varying effectiveness (53%-75% and 28%-91% particle removal efficiency, respectively). Most surgical-style masks improved with the nylon overlayer, indicating poor fit. This rapid testing method uses widely available hardware, requires only a few calculations from collected data, and provides both a holistic and aspect-wise evaluation of mask performance.