On the 18th, Jiangcheng Wuhan was caught in moderate pollution. In a pharmacy at Jiangda Road in Hankou, Ms. Liu carefully consulted the protective effect of the mask and purchased a KN95 mask.
KN series masks can effectively block fine particles. The larger the number behind the letters, the higher the protection level. Therefore, many members of the public think that buying a KN95 mask will be a big deal. But medical experts say that is not the case. "The protective effect of the mask itself does not equal the actual protective effect. A mask that can fit closely with your face is far more effective than a mask with a nominally high protection capability." Cheng Zhenshun, chief physician of respiratory department at Zhongnan Hospital, believes that. When purchasing masks, citizens should "try on" like buying clothes.
How to determine whether a mask fits? Cheng Zhenshun suggested that when the public try on masks, they can bend and close their fingers slightly and buckle them on the left and right sides of the mask to inhale deeply. If the masks are tightly absorbed around the face, then the masks are well-sealed. Otherwise, you need to readjust it. If the mask still leaks after repeated debugging, it means that the “size†of the mask is not suitable for the face shape.
In addition to the "size," some masks have the same level of protection but differ in material, resulting in price differences. Cheng Zhenshun reminded that the mask is not as expensive as possible, and the material is suitable for his own skin and comfortable to wear. It is also very important.
Some citizens also choose masks with excessively high levels of protection when the air pollution is not serious, causing discomfort. "Actually, wearing a mask, like wearing a dress, can fully consider the wearing comfort and protective effect of the mask and replace it according to everyday conditions." Cheng Zhenshun, for example, for example, wears KN90 masks when the air pollution is not serious; serious air pollution At that time, wear a KN95 mask and try to avoid going out.
In addition, the public can choose to use a mask with a breathing valve when choosing an anti-mite mask. This can make breathing easier.
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