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The difference and use of medical masks, N95 and kn95 masks

2020-07-04  180

On January 31, the Red Cross Society of Hubei Province issued a correction statement on the reception and use of "36000 N95 masks", which mentioned that on January 26, 2020, a caring enterprise donated 36000 kn95 masks to the Red Cross Society of Hubei Province. 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. Based on the objective needs of humanitarian rescue and the current situation of materials at that time, 18000 kn95 masks were donated to Wuhan Ren'ai hospital.

Many caring people and the public do not know about different types of masks. On January 25, the Union Medical College Affiliated Hospital of Huazhong University of science and Technology issued the reply to relevant questions about the acceptance of love donation by Union Medical College of Huazhong University of science and technology, which mentioned the differences among medical protective masks, N95 masks and kn95 masks.

It is mentioned in the article that at present, the Union Medical College Hospital is in urgent need of goggles, N95 masks, surgical masks, disposable medical masks, medical caps, protective clothing, operating clothes, anti impact eye masks, protective masks, and various disinfectants.

Some materials shall meet or be higher than the following standards:

1. Medical protective mask: in accordance with China GB 19083-2010;

2. N95 mask: NIOSH certification, filtration efficiency of non oily particles ≥ 95%;

3. European N95 mask: European FFP2 standard;

4. Kn95 mask: in line with the mandatory standard of GB 2626, the filtration efficiency of non oily particles is more than 95%.

Medical personnel must use medical protective masks in the following situations:

1. Close contact with infected patients;

2. Carry out operations that may produce aerosol, such as sputum suction, intubation, etc;

3. The possible operation of producing body fluid splashing.

In other cases, N95 or kn95 mask can be worn. The key to wearing a mask is to fit the face tightly. Protective masks with respirators are not allowed. As for surgical masks, it is in line with yy0469-2011 medical surgical masks.

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 for on-site investigation, sampling and testing personnel. It can also be worn by the public in highly crowded places or closed public places.

The specific scenes of wearing kn95 / N95 and above particulate matter protective masks include: in densely populated public transport places and taking vehicles; when entering the living space of isolated people at home, do not touch and adjust the masks; when investigating suspected and confirmed cases; for environmental cleaning and disinfection personnel and body disposal personnel.

In addition, for the public transport drivers, taxi drivers, public service personnel, armed police, traffic police, security personnel, media reporters, express delivery personnel and other industry personnel, due to the daily contact with more people, there is a risk of infection, the unit where they work should be equipped with medical masks or medical surgical masks or kn95 / N95 or above particulate matter protective masks.