Prevention of novel coronavirus pneumonia,how to use a mask

2020-07-04  786

Can disposable mask use medical alcohol spray for disinfection and reuse? Feng Luzhao, a researcher at the China Center for Disease Control and prevention, said: ordinary residents who use disposable masks in places with relatively small risks can be reused under the condition that the masks are clean and structurally complete, especially the inner layer is not polluted. After each use, they should be placed in a clean, dry and ventilated place in the room. In addition, spraying disinfectant, including medical alcohol, will reduce the protection efficiency, so it is not suitable to use alcohol spray to disinfect the mask.

Some people asked if the masks could be washed or reused after microwave disinfection. Wu Zunyou, chief epidemiologist of China CDC, said: after using masks, especially disposable masks, they will be thrown away immediately. This is actually unnecessary. For example, I also wear masks every day. I can change them once a day or two. We don't recommend microwave disinfection or repeated use of masks after washing.

Feng stressed that the reuse of masks should be based on specific situations. If you are alone, for example, if you don't have contact with outsiders at home, you can not wear masks, including in private cars, or in the outdoors, in the community, or for a walk in the park with few pedestrians. However, in public places with dense population, patients who take transportation, including shopping malls, elevators, including meeting rooms, and go to general medical institutions (except fever clinic), can wear ordinary medical masks, which is what we call disposable medical masks. In this case, the mask can be reused in a clean, dry and ventilated place after going home.

It is suggested that medical surgical masks should be worn for workers in intensive places, including those engaged in epidemic related industries, administrative personnel, police, security guards, express delivery personnel, etc., and the use duration and replacement frequency of masks can be appropriately extended according to the actual situation. Generally speaking, if there is no obvious dirt deformation, it is not necessary to change the masks every four hours If there is dirt, deformation, damage, smell, it needs to be replaced in time.

The respirator with breathing valve can only protect yourself, not the people around you. Recently, a news that "respirator with breathing valve is one-way protection, only protects the wearer of the mask, but not the surrounding people" spread in the circle of friends.

Jiang Xueqiang, director of infectious diseases department of Dongfeng General Hospital of Chinese medicine, said that the news was true. In order to prevent and control the epidemic, citizens were advised not to wear masks with breathing valves.

Jiang Xueqiang introduced that the national standard of the people's Republic of China GB 19083-2010 "technical requirements for medical protective masks" clearly states that medical protective masks should not have breathing valves. Therefore, this kind of respirator with breathing valve is not a medical protective mask conforming to the standard.

Jiang Xueqiang further pointed out that there is a valve in the respiratory valve, which is closed when inhaled and opened when exhaled. The gas exhaled by the wearer is directly discharged into the surrounding environment without filtration. Therefore, the respirator with breathing valve is only one-way protection, which only protects the person wearing the mask, but not the people around the respirator. It is mainly used in industrial dust-proof masks and anti haze (PM2.5) masks, and is not suitable for medical institutions.

"If an infectious person wears a mask with a breathing valve, the surrounding population is still at risk and has no protective effect. Therefore, medical personnel should not wear such masks, and patients should not wear such masks. When medical protective masks are in short supply, medical surgical masks should be preferred. "

He said that for the general population without symptoms, medical surgical masks are also a better choice than masks with breathing valves, which are more conducive to the control of the epidemic situation.