Do you know how to use N95&KN95 masks correctly? Shortage of masks in various regions, overtime production by manufacturers, and disposal of masks after use have made "masks" a sensitive term that affects social nerves in the face of the COVID-19 pandemic.
Facing viruses like flood beasts, wearing masks has become the first line of defense for people to do a good job in prevention and control. So a new question arises: how to use N95&KN95 masks correctly after purchasing them that can prevent epidemics?
How to wear it?
The wearing method of medical protective masks is very important, otherwise even if the correct mask is purchased, wearing it incorrectly will affect the filtering effect. Liang Jiansheng, director of the Disinfection and Vector Control Institute of Wuhan Center for Disease Control and Prevention, introduced the specific wearing steps as follows: 1 Hold the protective mask with one hand, with the side with a nose clip facing outwards; 2. Cover the nose, mouth, and chin with a protective mask, and press the nose clip upwards against the face; 3. Use the other hand to pull the lower strap over your head and place it under your ears behind your neck; 4. Pull the upper strap up to the middle of the head; 5. Place the fingertips of both hands on the metal nose clip, start from the middle position, press the nose clip inward with your fingers, and move and press it to both sides respectively, shaping the nose clip according to the shape of the nose bridge. It is worth noting that if going to public places and not in contact with patients, wearing a medical surgical mask is sufficient and there is no need for excessive protection. However, if there is contact with patients, wearing a biological resistant N95 mask is necessary.
Do you choose masks with or without breathing valves?
Non breathing valve mask: bi-directional protection, both inhalation and exhalation must be filtered through the mask.
A one-way breathing valve mask: the wearer can only protect themselves and cannot protect the environment. It is recommended that everyone wear a mask without a breathing valve.
Can masks be reused?
N95 level and above masks can theoretically be used for 1 to 2 days, while disposable N95 masks cannot be reused after removal.
N95 masks provide tight protection, but there may be a noticeable stuffiness after prolonged use. Professor Wang Yuedan of the School of Immunology at Peking University reminds that wearing an N95 mask should not exceed 4 hours at a time. Prolonged use of an N95 mask can cause lung damage and may lead to problems such as emphysema.
Experts Zong Zhiyong and Wang Yantong from the Infection Management Department of West China Hospital of Sichuan University suggest that children under the age of 7 should not wear N95 masks, even if they are specially designed with air valves, because the breathing resistance will be too high and children may be at risk of suffocation.
Can masks be reused repeatedly? Experts Zong Zhiyong and Wang Yantong clearly stated, "No, no matter what type of mask, there is a usage period. Disposable medical masks are recommended to be replaced every 4 hours; medical protective masks are recommended to be used for 6-8 hours
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