In vivo protective performance of N95 respirator and surgical facemask
In vivo protective performance of N95 respirator and surgical facemask
复制标题
DOI：
10.1002/ajim.20395
复制
发表时间：
2006-12-01
影响因子：
3.5
通讯作者：
Newton, E.
中科院分区：
文献类型：
--
作者：
Li, Y.;Wong, T.;Newton, E.
背景 2003 年爆发的 SARS 引发了有关医护人员防护性能口罩的重大争议。本研究报告了外科口罩和N95口罩的体内防护性能研究。方法以香港医院使用的典型外科口罩和N95口罩与经过纳米功能材料处理的口罩（称为纳米口罩）进行各种物理性能和体内佩戴过滤效率的比较，以及外科口罩在医院的使用性测试。结果物理性能测试显示N95口罩的透气性和水蒸气渗透性明显低于外科口罩。体内过滤测试表明，N95口罩可过滤97%的氯化钾（KCl）溶液，而外科口罩可过滤95%的KCl溶液。与普通N95和外科口罩相比，纳米口罩表现出更强的拒水性和抗菌活性，但使用性没有差异。结论外科口罩可以提供95%过滤效率的体内过滤保护。 N95 口罩可提供高达 97% 的体内过滤效率，同时显着降低透气性和水蒸气渗透性。与普通外科口罩/呼吸器相比，纳米口罩可以提供额外的保护功能，阻止毛细血管扩散和抗菌活性。
Background The SARS outbreak in 2003 has spawned a major controversy concerning protective performance facemasks for healthcare workers. This study reports a study on in-vivo protective performance of surgical masks and N95 respirators.Methods Typical surgical masks and N95 respirators used in Hong Kong hospitals were tested in comparison with those treated with nano-functional materials (called nanomasks) on various physical properties and in-vivo wear filtration efficiency, as well as usability test in hospitals for surgical masks.Results Tests on physical properties showed that N95 respirators had significantly lower air permeability and water vapor permeability than surgical masks. The in-vivo filtration tests illustrated that N95 respirators filtered out 97% of potassium chloride (KCl) solution, while surgical masks filtered out 95% of KCl solution. Nano-masks show stronger water repellency and antibacterial activities, but no difference in usability, comparing with normal N95 and surgical masks.Conclusions Surgical masks can provide in-vivo filtration protection of 95% filtration efficiency. N95 respirators provide higher in-vivo filtration efficiency of 97% with significant reduction of air permeability and water vapor permeability. Compared to normal surgical masks/respirators, the nano-masks can provide additional protective functions in stopping capillary diffusion and antibacterial activities.