What are the precautions for masks?
Duration of application
From the perspective of human physiological structure, because of the strong blood circulation in human nasal mucosa, the channel in the nasal cavity is very curved, and the nasal hair forms a filter "barrier". When air is drawn into the nostril, the air flow forms a vortex in the curved channel, which makes the air flow in the nasal cavity warm. Some tests have shown that when the cold air at minus 7 ℃ is inhaled into the lungs through the nasal cavity, the air flow has been heated to 28.8 ℃, which is very close to the temperature of the human body. If long time wear mask, will make the nasal mucosa become weak, lost the original physiological function of the nasal cavity, so can not wear mask for a long time. Masks can only be worn in special environments, such as in places where there are many people and air is not circulating. Of course, walking in the wild, in order to resist wind and sand and cold, or in the air pollution environment, it is necessary to wear masks, but the time should not be too long. In addition, in the flu season, to public places where there may be a large number of pathogens, it is also time to wear masks. Wearing masks is only one of the ways to prevent respiratory epidemic, and the most important thing is to adhere to good living habits.
Cleaning and maintenance
The outer layer of mask often accumulates a lot of dust, bacteria and other dirt in the outside air, while the inner layer blocks the bacteria and saliva exhaled. Therefore, both sides cannot be replaced. Otherwise, the outer layer of the dirt will be inhaled into the human body when it is directly close to the face, and become the source of infection. When the mask is not worn, it should be folded in a clean envelope, and the side close to the mouth and nose shall be folded in. It is not allowed to plug it into the pocket or hang it on the neck at will.
If mask is wet by exhaled hot air or saliva, its effect of the blocking bacteria will be greatly reduced. Therefore, it is better to prepare more masks in order to replace and use them. They should be changed once a day. Wash should be hot with boiling water for 5 minutes.
Masks should be cleaned and disinfected every day. Whether it is gauze mask or air filter mask, it can be sterilized by heating. The specific measures are as follows:
1. cleaning. First, gently rub the gauze mask with warm water and soap. The bowl shaped mask can be cleaned with a soft brush dipped in detergent, and then washed with clean water. Please note that do not rub hard, because if the gap between the longitude and latitude of gauze is too large, it will lose the effect of preventing foam.
2. disinfection. Soak the clean mask in 2% Peracetic Acid Solution for 30 minutes or cook in open water for 20 minutes or steam in a steamer for 15 minutes, then dry for standby. This method is suitable for gauze mask and bowl mask.
3. Inspection. Before using again, it is necessary to carefully check whether the mask and mask are still intact. For gauze masks and masks, light transmission inspection method can be adopted, that is, take care of the light before getting the light to see if there are any obvious light points. Whether the transmittance of the middle part and the marginal part is the same, if you have any doubt, you should replace the new one. However, masks and masks will be updated 3 to 7 times in the future. The masks with excellent quality can be cleaned 10 times. Activated carbon adsorption mask should pay attention to the regular replacement of activated carbon interlayer, if the activated carbon interlayer is not replaceable, it will be replaced after 7 to 14 days. This mask can not be cleaned before reuse.
