Standard wearing
If there is a gap between the mask and the face, when people breathe, the airflow will flow to the gap, and the dust, droplets, aerosols, etc. attached to the virus can be accompanied by the airflow through the gap into the body, causing infection. Therefore, officers and soldiers should regulate the wearing of masks. When wearing the mask, first unfold the radian reserved layer of the mask, fix the mask on the face through the ear band, completely wrap the mouth, nose and lower jaw, then firmly pinch the metal strip above the bridge of the nose to make it close to the bridge of the nose, and finally adjust the air tightness of the chin. If necessary, tie the lanyard from the back of the head to improve tightness. Avoid touching the outside of the mask with your hands throughout the wearing process.
distinguish between positive and negative
The disposable medical masks worn by everyone are divided into three layers, the outermost layer is the water resistance layer, the middle is the filter layer, and the inner layer is the moisture absorption layer. The moisture absorption layer can absorb the moist gas exhaled from the mouth and nose and keep the mask dry. If the mask is worn backwards, the gas exhaled from the nose and mouth cannot be effectively absorbed, and the mask is easily damp and loses its protective effect. Before wearing a mask, the nose clip side of the mask should be upward and the dark side should be outward. If there is no color difference in the mask, it can be judged according to the folds of the mask, and the folds are down to the outside.
Timely replacement
Under normal circumstances, disposable medical masks and medical surgical masks are limited to use, and the cumulative use does not exceed 8 hours; occupational exposure personnel use masks for no more than 4 hours. After the use time of the mask reaches the upper limit, you cannot continue to use it. The mask should be replaced in time in the following situations: the mask is damaged or damaged; the mask is contaminated (such as foreign bodies such as blood stains or droplets); it has been used in isolation wards or in contact with patients; the mask is affected with moisture; there is peculiar smell in the mask; the respiratory resistance is obviously increased; the mask and the face cannot be closed.
Prohibited matters
Don't pull it to your chin or hang it on your arms.
Some people will pull the mask to the chin when wearing a mask, exposing the mouth and nose. This not only causes the mouth and nose to lose protection, but also contaminates the inner layer of the mask, which increases the risk of infection when the mask is re-worn. Some people will put the mask on their arms after taking off the mask, which is not desirable. During physical activities, the mask may come into contact with items contaminated by the virus, and the inside of the mask is also easily contaminated with dust and bacteria, making it more likely to be infected when worn again.
Do not touch the outside of the mask.
Masks can block droplets. If you touch the outside of the mask with your hands, your hands may be contaminated by the outside of the mask. If you touch your nose and eyes with dirty hands, the virus will enter the human body unconsciously. When picking the mask, it should be taken down by a lanyard and discarded in the air. Try to avoid the mask touching any part of the body.