Research data supporting "Experimental Measurement of the Size of Gaps Required to Compromise Fit of an N95 Mask"

The effectiveness of N95 masks is heavily dependent on the quality of mask fit, with poor fit rendering such masks inadequate to protect the wearer. However, there have been limited efforts to discover the size of the gaps in the seal required to compromise mask performance, with prior studies estimating this size based on in vitro models. In this study, we measure the size of gap necessary to compromise the OSHA protection requirements of N95 masks. The data were generated via quantitative fit testing on two individuals. Quantitative fit testing was performed with a TSI Portacount Pro Respirator Fit Tester model 8038+, capable of assessing masks with less than 99% filtration efficiency. The device measures particles with a minimum size of 0.02 micrometers at a sampling flow rate of 350 cm^3/min.N95口罩（N95 masks）的防护效能高度依赖佩戴密合度质量，若密合不佳，此类口罩将无法为佩戴者提供有效防护。然而，目前针对破坏口罩防护性能所需的密封间隙尺寸的研究仍较为有限，既往研究多基于体外模型对该临界间隙尺寸进行估算。本研究旨在测定足以使N95口罩无法满足美国职业安全与健康管理局（OSHA）防护要求的间隙尺寸。本次研究的数据集通过对两名受试者开展定量密合度测试生成。定量密合度测试采用TSI Portacount Pro呼吸器密合度测试仪型号8038+完成，该设备可对过滤效率低于99%的口罩进行性能评估，其采样流量为350立方厘米每分钟，可检测的最小颗粒物粒径为0.02微米。