一次性口罩和呼吸器定量贴合度测试改良程序的开发与应用。
Development and application of a modified procedure for quantitative fit testing of disposable masks and respirators.
机构信息
Safety Sciences, University of Central Missouri, Warrensburg, Missouri.
Phillips 66, Ferndale, Washington.
出版信息
J Occup Environ Hyg. 2022 May;19(5):266-270. doi: 10.1080/15459624.2022.2050741. Epub 2022 Mar 30.
In this study, a modified procedure for quantitative fit testing of disposable masks and respirators using condensation nuclei counting was developed and applied. The procedure permits disposable masks and respirators to be initially tested and retested multiple times after use. Different types of masks and respirators were tested over time and quantitative results were obtained. It was found that after multiple testing that the N95 respirator passed the testing requirements with a fit factor above 100, the KN95 respirator did not perform satisfactorily in the tests, and the disposable masks did not reach fit factors above 4 or 7. The results in this study provided relevant information toward use, reuse, and testing of disposable masks and respirators, particularly relevant during the COVID pandemic when access to N95 respirators was limited.
本研究开发并应用了一种使用凝结核计数对一次性口罩和呼吸器进行定量适合性测试的改良程序。该程序允许一次性口罩和呼吸器在首次测试后多次重复使用和重新测试。不同类型的口罩和呼吸器随时间进行了测试，并获得了定量结果。结果发现，经过多次测试，N95 呼吸器的适合因子超过 100，符合测试要求，而 KN95 呼吸器在测试中表现不佳，一次性口罩的适合因子未达到 4 或 7 以上。本研究的结果为一次性口罩和呼吸器的使用、重复使用和测试提供了相关信息，尤其是在 COVID 大流行期间，N95 呼吸器供应有限时，这些信息尤为重要。
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