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Can N90 protective masks be reused?

by:Copper Plus     2021-06-06
Due to the large respiratory resistance of protective masks, in order to ensure the health of our respiratory function, experts recommend taking off the copper mask to rest in about 4 hours. However, there is a slight controversy here. Some people suggest that you change it directly after replacement (this is definitely the most ideal), and some people suggest that you can take a rest and continue wearing it and reuse it. At present, foreign countries, including the World Health Organization (WHO), have no clear conclusions on the best time to wear medical protective masks. The National Institute of Occupational Safety and Health (NIOSH) and my country’s current 'Hospital Isolation Technical Specifications' are only for the replacement of masks. Time to make a description of the situation. According to reports in the literature, the filtration efficiency of N95 masks is still above 95% for 2d, above 90% for 6d, and above 80% for 14d. The data of N90 level is similar.   The current situation we are facing is a shortage of supplies. Let alone protective masks, even the most basic medical care masks may be out of stock from time to time. At this time, every copper mask is precious personal protective equipment. If you really need to change it every 4 hours, it would be unbearable. Therefore, protective masks above the N90 level can be reused, but you must pay attention to the application conditions. 415
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