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Popular science | The difference and use of medical masks, N95, KN95 masks

On January 31, the Hubei Provincial Red Cross issued a correction statement on the reception and use of “36,000 N95 masks,” which mentioned that on January 26, 2020, a loving company donated 36,000 KN95 to the Hubei Provincial Red Cross. Masks. After learning from the health department, this model product cannot be used for the protection of first-line medical staff in designated hospitals for the treatment of new coronary pneumonia, but it can be used for general protection. Based on the objective needs of humanitarian emergency and the current material situation at that time, it donated 18,000 KN95 masks to Wuhan Renai Hospital.

  Many caring people and people do not understand the different types of masks. Previously, on January 25, the Concord Hospital of Tongji Medical College of Huazhong University of Science and Technology released the medical protective masks mentioned in the “Response to Relevant Questions about Concord Hospital Accepting Donations from Caring” , The difference between N95 masks and KN95 masks.

  The article mentions that the Union Hospital is in urgent need of: goggles, N95 masks, surgical masks, disposable medical masks, medical caps, protective clothing, surgical gowns, anti-impact eye masks, protective masks, and various disinfectants.

  Some materials must meet or exceed the following standards: 1. Medical protective masks: comply with Chinese GB 19083-2010; 2. N95 masks: American NIOSH certification, non-oily particulate filtering efficiency ≥95%; 3. European N95 masks: European FFP2 standard ; 4, KN95 masks: comply with China’s GB 2626 mandatory standards, non-oily particulate filtering efficiency ≥ 95%.

  Medical staff must use medical protective masks in the following situations: 1. Close contact with infected patients; 2. Perform operations that may generate aerosols, such as sputum suction, intubation, etc.; 3. Operations that may cause splashing of body fluids.

  In other cases, you can wear a N95 mask or a KN95 mask. The key to wearing a mask is the close contact with the face. You cannot use a protective mask with a respirator. As for the surgical mask, it is in accordance with yy0469-2011 medical surgical mask.

  As for the specific use of masks, on January 31, the National Health and Health Commission for Disease Control and Prevention issued the “Notice on the Issuance of Guidelines for the Protection of New Coronaviruses at Different Risks and the Guidelines for the Use of Pneumonia Masks to Prevent New Coronavirus Infections.” KN95/N95 and above particle protection masks: The protective effect is better than medical surgical masks and disposable medical masks. It is recommended for on-site investigation, sampling and testing personnel. The public can also wear it in highly crowded places or closed public places.

  The specific scenarios of wearing KN95/N95 and above particulate protective masks include when you are in a densely populated public transportation place and when you are taking a vehicle; when you enter the residential space of isolated people, do not touch and adjust the mask during the time; when conducting investigations of suspected and confirmed cases ; For environmental cleaning and disinfection personnel, corpse disposal personnel.

  In addition, for personnel in public transportation, taxi drivers, service personnel in public places, armed police, traffic police, security personnel, media reporters, couriers, etc., because there are many people in daily contact, there is a risk of infection. It is equipped with disposable medical masks or surgical masks or KN95/N95 and above particulate protective masks.

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