Chen Hao, Pennington Edward R, Case Martin W, Tong Haiyan, Rappold Ana G, Samet James M, Prince Steven E
Oak Ridge Institute for Science Education, Oak Ridge, Tennessee.
Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina.
AJPM Focus. 2022 Sep;1(1):100014. doi: 10.1016/j.focus.2022.100014. Epub 2022 Jul 21.
Fitted filtration performance of an N95 respirator may benefit from differing levels of instructions.
Using a modified Occupational Safety and Health Administration fit test protocol, we measured fitted filtration efficiency for an N95 respirator in 21 screened, healthy participants given 4 levels of escalating instruction: (1) uninstructed (baseline), (2) written/pictorial manufacturer instructions, (3) step-by-step video demonstration, and (4) staff instruction (visual inspection of respirator fit and verbal suggestions to adjust when applicable).
Baseline fitted filtration efficiency was not significantly different between participants with or without previous experience of N95 use. Clear improvements in fitted filtration efficiency were observed progressing from baseline (average=86.1%) to manufacturer paper instructions (93.3%), video instructions (97.5%), and post staff intervention (98.3%). Baseline fitted filtration efficiency values were significantly lower than those after video instruction (p<0.037) and staff intervention (p<0.033) sessions.
Beyond uninstructed wear or provision of manufacturer instructions, efforts to train and instruct users in proper respirator fit principles with visual feedback are likely to yield benefits to public health outcomes in reducing respiratory exposure during air quality emergencies such as airborne viral outbreaks and wildland fires.
N95口罩的贴合过滤性能可能会因不同程度的指导而受益。
我们采用经修改的美国职业安全与健康管理局的适合性测试方案，对21名经过筛选的健康参与者佩戴的N95口罩的贴合过滤效率进行了测量，这些参与者接受了4个逐步增加指导水平的指导：（1）无指导（基线），（2）制造商提供的书面/图片说明，（3）分步视频演示，以及（4）工作人员指导（对口罩贴合情况进行目视检查，并在适用时提供调整的口头建议）。
有无N95使用经验的参与者之间，基线贴合过滤效率无显著差异。从基线（平均=86.1%）到制造商纸质说明（93.3%）、视频说明（97.5%）以及工作人员干预后（98.3%），贴合过滤效率有明显提高。基线贴合过滤效率值显著低于视频指导（p<0.037）和工作人员干预（p<0.033）后的数值。
除了无指导佩戴或提供制造商说明外，在空气质量紧急情况（如空气传播病毒爆发和野火）期间，通过视觉反馈对使用者进行适当的呼吸器贴合原则培训和指导，可能会对减少呼吸道暴露的公共卫生结果产生益处。
