If there is a gap between the mask and the face, when a person breathes, the airflow will flow to the gap. The dust, droplets, aerosols, etc. attached to the virus can enter the body through the gap with the airflow and cause infection. Therefore, officers and soldiers must standardize the wearing of masks. When wearing the mask, first unfold the arc reserved layer of the mask, fix the mask on the face with ear straps, completely wrap the mouth, nose, and jaw, and then firmly pinch the metal strip above the bridge of the nose to make it close to the bridge of the nose. Adjust the air tightness of the chin. If necessary, the lanyard can be knotted from the back of the head to improve the tightness. Avoid touching the outside of the mask with your hands during the entire wearing process.
Distinguish the pros and cons
The disposable medical masks that everyone wears are divided into three layers, the outermost layer is a water-blocking layer, the middle is a filter layer, and the inner layer is a moisture-absorbing layer. The hygroscopic layer can absorb the moist gas exhaled by the mouth and nose to keep the mask dry. If the mask is worn upside down, the breath exhaled from the mouth and nose cannot be effectively absorbed, and the mask is easily wet and loses its protective effect. Before wearing the mask, the nose clip side of the mask should be facing up and the dark side facing out. If there is no difference in color of the mask, it can be judged according to the folds of the mask.
Replace in time
Under normal circumstances, disposable medical masks and medical surgical masks are for limited use, and the cumulative use does not exceed 8 hours; the use of masks by occupational exposure personnel does not exceed 4 hours. After the use time of the mask reaches the upper limit, it cannot be used any more. The mask should be replaced in time when the following situations occur: the mask is damaged or damaged; the mask is contaminated (such as blood stains or droplets and other foreign objects); it has been used in an isolation ward or in contact with patients; the mask is damp; there is a peculiar smell in the mask; respiratory resistance Significant increase; the mask cannot be closely attached to the face.
Don’t pull your chin or hang it on your arm
When some people wear a mask, they pull the mask to their chin to expose their mouth and nose. This not only loses the protection of the mouth and nose, but also contaminates the inner layer of the mask. When the mask is worn again, it will increase the risk of infection. Some people put the mask on their arm after taking off the mask, which is also undesirable. During physical activity, the mask may come into contact with items contaminated by viruses, and the inner layer of the mask is also easily contaminated with dust and bacteria, and it is more likely to be infected when you wear it again.
Do not touch the outside of the mask
The mask 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 unknowingly. When removing the mask, it should be removed through a lanyard, and discarded in the air. Try to avoid the mask from contacting any part of the body.