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How to choose a mask?

Release time: 2021-01-26

Views: 66

How to choose a mask?

Common masks are as follows: ordinary cotton masks, disposable masks (such as medical surgical masks), and N95 masks.

Disposable mask (medical surgical mask):

It can prevent respiratory infections to a certain extent, but cannot prevent haze. Medical surgical masks have three layers, from the outside to the inside are the waterproof layer, the filter layer, and the comfort layer. The comfort layer is a layer of non-woven fabric. When wearing, the white non-woven fabric is facing inward, the blue waterproof layer is facing outward, and the side with the metal sheet is facing upwards. Fit the nose and smooth the cheeks so that there is no gap between the mask and the face.


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Ordinary cotton mask:

Its material may be cotton, gauze, wool, canvas and velvet, etc. Because the material itself is not dense enough, it cannot prevent infection.

N95 mask:

It can effectively prevent respiratory infections and prevent haze.

The N95 mask is one of the 9 anti-particulate masks certified by NIOSH (National Institute of Occupational Safety and Health). "N" means not suitable for oily particles (the fume produced by cooking is oily particles, while the droplets produced by people talking or coughing are not oily); "95" means that under the testing conditions specified by the NIOSH standard, filter The efficiency reaches 95%.

N95 is not a specific product name. As long as the products meet the N95 standard and pass the NIOSH review, they can be called "N95 masks."


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The biggest feature of the N95 mask is that it can prevent droplet infection caused by the patient's body fluid or blood splash. The size of the droplets is 1 to 5 microns in diameter.

The U.S. Occupational Safety and Health Administration (OSHA) stipulates that medical personnel exposed to tuberculosis bacteria must wear masks above the N95 standard for medical institutions.

Compared with medical surgical masks, N95 masks are better sealed. When choosing N95 masks, try to choose N95 masks without breathing valves.

If you go to a general open public place and do not come in contact with patients, you can choose to wear a medical surgical mask without excessive protection, but if you will come into contact with patients with suspected respiratory tract infections, you should wear N95 masks.


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Wear a mask when you go to the hospital to see a doctor or visit a patient, especially when you go to the fever clinic or the respiratory department of the hospital;

It is recommended to wear masks in crowded places such as supermarkets, shopping malls, and theaters during the season when respiratory infectious diseases are high;

To prevent the spread of the disease to others, you should wear a mask in time when you have symptoms of respiratory diseases such as fever, cough, and runny nose.

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