Han Don-Hee, Park Yesol, Woo Jae-Jong
Department of Occupational Health and Safety Engineering, Inje University, Republic of Korea.
Shinyongsa Co., Republic of Korea.
Ind Health. 2018 Feb 7;56(1):78-84. doi: 10.2486/indhealth.2017-0069. Epub 2017 Aug 31.
To get a better fit performance of filtering facepieces, a tight fitting net (TFN) was invented. This study was carried out to evaluate whether the TFN improves fit performance using a quantitative fit test (QNFT). The existing mask was of cup type with an aluminum clip on the nose bridge. The TFN mask was the same as the existing mask, but attached a TFN instead of aluminum clip. One hundred subjects (male 52, female 48) were selected to match fourfold in Korean 25-member facial size category for half-mask (KFCH). Fit factors (FFs) were measured using a QNFT by a PortacountPro+8038. Three QNFTs for each mask on the same subject was conducted and geometric mean FF (GMFF) was determined. The mean and median GMFFs of the TFN masks had higher than those of the existing mask (p=<0.001). The existing masks had tendency to have higher GMFFs with common facial size categories, while the TFN masks were regardless of facial size. The result indicates that putting even pressure on the entire parts of filter media would improve fit performance. In conclusion, to get a good fit when wearing filtering facepieces, a TFN would be an alternative to mask designing.
为了使过滤式面罩获得更好的贴合性能，发明了一种紧密贴合网（TFN）。本研究旨在通过定量贴合测试（QNFT）评估TFN是否能提高贴合性能。现有的面罩为杯型，鼻梁处有一个铝制夹子。TFN面罩与现有面罩相同，但用TFN代替了铝制夹子。选取了100名受试者（男性52名，女性48名），使其在韩国25人面部尺寸类别中与半面罩（KFCH）的四倍相匹配。使用PortacountPro + 8038通过QNFT测量贴合因子（FFs）。对同一受试者的每个面罩进行三次QNFT，并确定几何平均FF（GMFF）。TFN面罩的GMFF均值和中位数高于现有面罩（p =<0.001）。现有面罩在常见面部尺寸类别中往往具有较高的GMFF，而TFN面罩则与面部尺寸无关。结果表明，对过滤介质的整个部分施加均匀压力会提高贴合性能。总之，为了在佩戴过滤式面罩时获得良好的贴合效果，TFN可作为面罩设计的一种替代方案。
