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Masks can be divided into the following categories:
1. Disposable surgical mask, product standard: YY/T 0969;
2. Surgical masks, product standard: YY 0469;
3. Particulate protective mask, product standard: GB 2626;
4. Medical protective mask, product standard: GB 19083;
All masks are required to meet the relevant product standards during the certification process. Specific test items are specified in the product standards, such as bacterial filtration efficiency (BFE), particle filtration efficiency (PFE), etc.
The standard surgical mask has three layers: the outer layer is waterproof to prevent droplets from entering the mask; The middle layer has filtration layer; The inner layer of the near muzzle is used for moisture absorption.
The key material for surgical masks is the intermediate filter layer. Some masks do not have a filter layer (melt-blown cloth).
Yes. Suspected or confirmed patients should not wear masks with respiratory valves that do not prevent the wearer's droplets from spreading into the environment.
The barrier protection effect of the mask is mainly reflected in the bacterial filtration efficiency (BFE). The standard of the medical mask and the medical N95 mask for BFE is the same, which should be no less than 95%.
If go to a public place, do not contact with the patient, wearing a disposable surgical mask is enough, do not need excessive protection; But if you have close contact with patients, wear a medical N95 mask.
Face small adults can wear children's masks, as long as the children's masks can fit the face, to ensure less facial nudity.
If the mask is just a little looser, you can also make some small adjustments by adjusting the tightness of the tie.
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