How to wear and remove n95 mask?
First, loosen the fixing strap of the mask every 2-4 cm. Secondly, put on a mask and put the fixing belt on the top of the head and the back of the head respectively. Then, press the metal strip on the edge of the mask to make it fit your face. Finally, check the tightness of n95 mask and adjust it to the most comfortable state. Professional dust masks must be worn as required, otherwise the protective effect cannot be guaranteed. Take the head mask as an example. First distinguish the wearing direction of the mask, with the nose clip facing up, hold your chin with the mask and cover your mouth and nose. Pull the headband above your head and put it higher behind your head. Pull the lower headband over your head and put it under your neck and ears to ensure that the two headbands are placed correctly. Only one dust will use it. After wearing the headband, press your hands on the metal nose clip to shape the bridge of your nose and make your mouth and nose fit closely with your face. Then do an air tightness check to ensure that the wearing position is correct and there is no obvious air leakage. To check the air tightness of the mask, N95 mask with valve and N95 mask without valve can be used for testing respectively.
Valveless inspection method of N95 mask: Cover N95 mask with both hands first, and then exhale. The mask should be slightly inflated. If there is air leakage at the gasket, adjust the position of N95 mask or nose clip to improve the sealing performance. If the edge of the mask leaks, adjust the position of the N95 mask headband on the head and re-check.
Inspection method of N95 mask with valve: Cover the mask with both hands and inhale. The mask should collapse slightly. If the gasket leaks, adjust the position of the mask and nose clip to improve the sealing performance; If air leaks around the mask, adjust the position of the headband on your head and check again. To master the correct use of N95 mask, we should not only wear it according to the instruction manual to ensure the correct position (no air leakage) every time, but also insist on wearing it during the operation, find out the signs of N95 mask failure in time and replace it in time. N95 mask must be worn according to regulations, and the air tightness of the mask must be tested after wearing. Once it is found that the N95 mask can't be sealed, don't enter the polluted area that needs respiratory protection.
N95 mask wearing method
1. Hold the protective mask with one hand so that the side with the nose clip faces in the opposite direction.
2. Cover your nose, mouth and chin with a protective mask, and clamp your nose against your face.
3. With the other hand, pull the lower strap over your head and put it under your ear at the back of your neck.
4. Then pull the upper tie to the middle of the head.
5. Put the fingertips of both hands on the metal nose clip, press the nose clip inward from the middle position with your fingers, and move and press to both sides respectively, and shape the nose clip according to the shape of the bridge of the nose.
How often should the N95 mask be changed?
If you must wear it, you'd better take it off for 20 minutes to half an hour to get some air. In case of dizziness or dyspnea, take it out immediately. Moreover, the N95 mask can't be used all the time after being bought, and it has a certain service life. He told reporters that with the increase of the use time of N95 mask, the filtered particles will gradually block the filter screen and the respiratory resistance will also increase. Moreover, the mask is thick. If you don't take it off for a long time, the "humid climate" inside may breed bacteria, and different use methods and storage methods will affect the service life of the anti-fog mask. It is recommended to change it every day. N95 mask can't be cleaned and disinfected, otherwise it will reduce the filtration efficiency. If you have come into contact with an infectious environment, or if you find parts damaged, such as lost nose clips, broken headband, broken mask, etc., you should replace them immediately. When should I change the mask? N95 respirator is one of the nine dust masks certified by National Institute of Occupational Safety and Health. "n" refers to particles that are not suitable for oiliness; "95" means that the filtration efficiency reaches 95%. The filtering efficiency of N99 mask reaches 99%. Experts suggest wearing N95 mask and changing it every two days. Take 3M masks as an example, N95 masks are generally used for 24-48 hours; The use time of R95 mask is about 8 hours; The use time of P95 mask is much longer than that of N95 mask, and the working time can reach 40 hours or 30 days. When one of the following three conditions is found, please replace the N95 mask immediately:
1 and N95 masks are contaminated, such as blood stains or droplets;
2. The user feels that the breathing resistance becomes larger;
3.N95 mask is damaged.
What's the difference between ordinary disposable masks and N95 masks?
1. Ordinary cotton mask: the material can be cotton, gauze, wool, canvas, velvet, etc. Because the material itself is not dense enough to prevent infection.
2. Disposable masks (such as medical surgical masks): It can prevent respiratory infection to a certain extent, but it cannot prevent smog.
3.N95 mask: It can effectively prevent respiratory infection and smog. However, the results of meta-analysis show that there is no significant difference between N95 protective mask and medical surgical mask in preventing infectious acute respiratory infection in clinical environment. In other words, for the purpose of self-protection and reducing the risk of respiratory infection, the latter two masks (medical surgical masks and smog masks) can be worn.