Experimental Efficacy of the Face Shield and the Mask against Emitted and Potentially Received Particles.
Experimental Efficacy of the Face Shield and the Mask against Emitted and Potentially Received Particles.
复制标题
DOI：
10.3390/ijerph18041942
复制
发表时间：
2021-02-17
影响因子：
--
通讯作者：
Rochoy M
中科院分区：
文献类型：
--
作者：
Wendling JM;Fabacher T;Pébaÿ PP;Cosperec I;Rochoy M
目前没有足够的证据支持面罩在源头控制方面的有效性。为了评估面罩和面罩的比较屏障性能效果，我们使用气溶胶发生器和粒子计数器来评估各种设备在可比情况下的性能。我们在一个实验装置中测试了不同的配置，在发射器或接收器的假人头上戴着口罩（外科I型），面罩（高22.5厘米，下巴下伸出7厘米，周长35厘米），或两者兼而有之。人体模型面对面，相距25 cm，强颗粒排放（52.5 L/min） 30 s。在我们的实验条件下，当受试者单独佩戴防护时，面罩更有效（减少因子= 54.8%），而口罩的减少因子较低（减少因子= 21.8%）（p = 0.002）。发射器单独佩戴防护装置时，面罩和面罩的接收颗粒水平均降低了96.8% （p = NS）。当发射器和接收器的假人头部都戴面罩时，在我们的实验条件下，这种保护允许更好的结果：面罩减少98%，而口罩减少97.3% （p = 0.01）。在所有配置中，面罩对吸入的小颗粒（<0.3µm - 0.3µm - 0.5µm - 0.5µm - 1µm）的防护效果甚至比口罩更好。因此，将我们实验研究中使用的面罩作为减少社区内传播战略的一部分将是有趣的。
There is currently not sufficient evidence to support the effectiveness of face shields for source control. In order to evaluate the comparative barrier performance effect of face masks and face shields, we used an aerosol generator and a particle counter to evaluate the performance of the various devices in comparable situations. We tested different configurations in an experimental setup with manikin heads wearing masks (surgical type I), face shields (22.5 cm high with overhang under the chin of 7 cm and circumference of 35 cm) on an emitter or a receiver manikin head, or both. The manikins were face to face, 25 cm apart, with an intense particle emission (52.5 L/min) for 30 s. The particle counter calculated the total cumulative particles aspirated on a volume of 1.416 L In our experimental conditions, when the receiver alone wore a protection, the face shield was more effective (reduction factor = 54.8%), while reduction was lower with a mask (reduction factor = 21.8%) (p = 0.002). The wearing of a protective device by the emitter alone reduced the level of received particles by 96.8% for both the mask and face shield (p = NS). When both the emitter and receiver manikin heads wore a face shield, the protection allowed for better results in our experimental conditions: 98% reduction for the face shields versus 97.3% for the masks (p = 0.01). Face shields offered an even better barrier effect than the mask against small inhaled particles (<0.3 µm–0.3 to 0.5 µm–0.5 to 1 µm) in all configurations. Therefore, it would be interesting to include face shields as used in our experimental study as part of strategies to reduce transmission within the community setting.
登录
查看更多内容
影响因子：
2.6
作者：
Vlacha V;Feketea G
通讯作者：
Feketea G
DOI：
10.1080/02786826.2020.1862409
发表时间：
2021-01-07
期刊：
Aerosol science and technology : the journal of the American Association for Aerosol Research
影响因子：
--
作者：
通讯作者：
--
影响因子：
28.3
作者：
Gorbalenya, Alexander E.;Baker, Susan C.;Ziebuhr, John
通讯作者：
Ziebuhr, John
影响因子：
3.9
作者：
Karimi, Saeed;Arabi, Amir;Safi, Sare
通讯作者：
Safi, Sare
影响因子：
3.9
作者：
Ma, Di;Chen, Chong-Bo;Ng, Tsz Kin
通讯作者：
Ng, Tsz Kin