Why wear medical protective masks

Due to the impact of the epidemic situation, everyone is now wearing masks when they go out, especially those workers struggling in the front line, who want to protect themselves. So why wear medical protective masks? Today's small series of medical protective masks are introduced as follows:

Medical protective mask is suitable for medical staff and related staff to protect respiratory tract infectious diseases transmitted by air. It is a kind of close fitting self-priming filtering medical protective equipment with high protection level. It is especially suitable for patients with respiratory tract infection transmitted by air or near distance through droplets in diagnosis and treatment activities. It can filter the particles in the air and block the droplets, blood, body fluid, secretion droplets, etc. it belongs to one-time use product. Medical protective masks can prevent most bacteria, viruses and other pathogens. Who recommends that medical personnel should use protective masks to prevent virus infection in the air.

Medical protective masks meet the standard of GB 19083-2003 "technical requirements for medical protective masks". The important technical indicators include filtration efficiency of non oily particles and airflow resistance. The specific indicators are as follows:

1) Filtration efficiency: under the condition of air flow rate of (85 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 ± 0.06) μ m shall not be less than 95%, that is, it conforms to N95 (or FFP2) or above. It can block the air borne infection factor with a diameter of & lt; 5 μ m or close contact with the infectious factor transmitted by droplets.

2) Inspiratory resistance: under the above flow conditions, the inspiratory resistance does not exceed 343.2pa (35mmh2o).

3) When the sample is sprayed to the mask under the pressure of 10.9kpa (80mmHg), the inner side of the mask should not show any technical indicators such as penetration.

4) The mask must be equipped with a nose clip, which is made of bendable plastic material with a length of & gt; 8.5cm.

5) The synthetic blood was sprayed to the mask sample at the pressure of 10.7kpa (80mmHg), and the inner side of the mask should not be penetrated.

The above is why you should wear a medical protective mask. I hope it can help you!