National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, Pittsburgh, PA.
National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, Pittsburgh, PA.
Am J Infect Control. 2024 Feb;52(2):159-166. doi: 10.1016/j.ajic.2023.05.013. Epub 2023 Jun 1.
A major concern among health care experts is a shortage of N95 filtering facepiece respirators during a pandemic. If the supply of N95 filtering facepiece respirators becomes limited, reusable elastomeric half-mask respirators (EHMRs) may be used to protect health care workers. The focus of this study was to evaluate the effects on the filter performance of wiping decontamination for EHMR P100 filter cartridges.
The filter cartridge exterior of EHMR Honeywell, Moldex, and Mine Safety Appliance (MSA) models was wiped using quaternary ammonium and sodium hypochlorite wipes. These filter cartridge properties were assessed including observational analysis and filter performance tests. These wiping and assessing procedures were repeated after each set of wiping cycles (50, 100, 150, 200, and 400 cycles) to determine the effects of wiping decontamination.
For sodium hypochlorite wipes, Honeywell, Moldex, and MSA models passed the National Institute for Occupational Safety and Health (NIOSH) liquid particulate penetration criteria for all wiping cycles from 50 to 400 (penetrations<0.014%). For quaternary ammonium wipes, filter penetrations of Moldex failed (penetrations>0.03%) after 150 cycles, while the filter penetrations of Honeywell and MSA passed for all wiping cycles (penetrations ≤0.013%).
Wiping decontamination methods using sodium hypochlorite and quaternary ammonium wipes could be considered promising decontamination candidates for Honeywell, Moldex, and MSA reuse, except for the wiping number selection for Moldex (<150 cycles) when using the quaternary ammonium wipe.
医疗专家主要关注的是大流行期间 N95 过滤式面罩呼吸器的短缺问题。如果 N95 过滤式面罩呼吸器的供应变得有限，可重复使用的弹性半面罩呼吸器（EHMR）可能被用于保护医护人员。本研究的重点是评估擦拭消毒对 EHMR P100 过滤罐的过滤器性能的影响。
使用季铵盐和次氯酸钠擦拭湿巾擦拭 Honeywell、Moldex 和 Mine Safety Appliance（MSA）型号的 EHMR 过滤罐外表面。评估这些过滤罐的特性，包括观察分析和过滤性能测试。在每组擦拭循环（50、100、150、200 和 400 次）后，重复这些擦拭和评估程序，以确定擦拭消毒的效果。
对于次氯酸钠擦拭湿巾，Honeywell、Moldex 和 MSA 型号在 50 到 400 次擦拭循环中均通过了美国国家职业安全与健康研究所（NIOSH）的液体颗粒物渗透标准（渗透值<0.014%）。对于季铵盐擦拭湿巾，在 150 次循环后，Moldex 的过滤器渗透失败（渗透值>0.03%），而 Honeywell 和 MSA 的过滤器渗透在所有擦拭循环中均通过（渗透值≤0.013%）。
使用次氯酸钠和季铵盐擦拭湿巾的擦拭消毒方法可能被认为是 Honeywell、Moldex 和 MSA 重复使用的有前途的消毒候选方法，但当使用季铵盐擦拭湿巾时，Moldex 的擦拭次数选择（<150 次）除外。
