be careful! Difference and use of medical protective / N95 / kn95 masks

On January 31, Hubei Red Cross Society issued a correction note on the reception and use of 36000 N95 masks, which mentioned that on January 26, 2020, a caring enterprise donated 36000 kn95 masks to Hubei Red Cross Society. The novel coronavirus pneumonia treatment unit is not available for the protection of front-line medical staff in the designated hospital of new crown pneumonia, but can be used for general protection. In line with the objective needs of humanitarian rescue and the current situation of materials at that time, 18000 kn95 masks were donated to Wuhan benevolence hospital.


Many caring people and people don't know about different types of masks. Previously, on January 25, the Affiliated Union Hospital of Tongji Medical College of Huazhong University of science and technology released the reply to relevant questions about the acceptance of love donation by Union Hospital, which mentioned the difference between medical protective masks, N95 masks and kn95 masks.


It is mentioned in the article that at present, there is an urgent shortage in Xiehe Hospital: goggles, N95 masks, surgical masks, disposable medical masks, medical caps, protective clothing, surgical gowns, anti impact goggles, protective masks and various disinfectants.


Some materials shall meet or be higher than the following standards: 1. Medical protective mask: China GB 19083-2010; 2. N95 mask: NIOSH certification in the U.S., filtration efficiency of non oil particles ≥ 95%; 3. N95 mask in Europe: FFP2 standard in Europe; 4. Kn95 mask: strong system standard in China GB 2626, filtration efficiency of non oil particles ≥ 95%.


Medical protective masks must be used by medical staff in the following situations: 1. Close contact with infected patients; 2. Operation that may produce aerosol, such as sputum suction, intubation, etc.; 3. Operation that may produce body fluid splashing, etc.


In other cases, N95 mask or kn95 mask can be worn. The key to wearing the mask is to fit the face, and the respirator can not be used. As for surgical mask, it is in line with yy0469-2011 medical surgical mask.


Novel coronavirus, novel coronavirus infection guidelines and new guidelines for the prevention of new coronavirus infection, were released in January 31st. The KN95/N95 and above particle respirators are better than surgical masks and disposable medical masks. It is recommended to be used by field investigation, sampling and testing personnel. It can also be worn by the public in highly crowded places or closed public places.


The specific scenarios of wearing kn95 / N95 and above particulate protective masks include: when people are in densely populated public transportation places and vehicles; when entering the living space of the home isolation personnel, do not touch and adjust the masks; when conducting the investigation of suspected and confirmed cases; for the environmental cleaning and disinfection personnel, and the corpse disposal personnel.


In addition, for the public transport department and passengers, taxi drivers, service personnel in public places, armed police, traffic police, security personnel, media reporters, express delivery personnel and other industry personnel, due to the large number of daily contact personnel, there is a risk of infection, and their units shall provide them with disposable medical masks or medical surgical masks or kn95 / N95 and above particulate protection masks.