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Medical surgical masks are suitable for the basic protection of medical staff or related personnel, as well as the protection against the spread of blood, body fluids and splashes during the invasive operation. The protection level is medium and has certain respiratory protection performance. It can block most bacteria and some viruses, prevent medical personnel from being infected, and also prevent the direct discharge of microorganisms carried by medical personnel’s breath, posing a threat to patients undergoing surgery. Medical surgical masks require the filtration efficiency of bacteria to be above 95%.

How often to change surgical mask

The requirements for the use of surgical masks are:

1. Do not reuse disposable masks. Usually need to be replaced every 6 to 8 hours.

2. The outer layer of the mask often accumulates a lot of dust, bacteria and other contaminants in the outside air, while the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides cannot be used alternately, otherwise the contaminated outer layer will be directly Inhale the human body when it is close to the face and become a source of infection.

 3. When the mask is not worn, it should be folded and placed in a clean envelope, and the side that is close to the nose and nose should be folded inwards. Do not stuff it into your pocket or hang it around your neck.

It should be emphasized that no matter what type of mask, the protective effect is limited and needs to be replaced regularly. It is best to replace it every 2 to 4 hours. If it is used for a long time, large particles will be blocked on the surface of the mask or the ultra-fine particles will block the gaps in the filter material of the mask, which will cause a decrease in filtration efficiency and an increase in respiratory resistance.

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