How to choose a mask to prevent new coronavirus pneumonia?

How to choose a mask to prevent new coronavirus pneumonia?
April 28, 2020 No Comments Tips customjune.com

Medical surgical masks are generally used in high-demand environments such as medical clinics, laboratories, and operating rooms, and are masks worn by medical staff when working. The safety factor is relatively high, and the resistance to bacteria and viruses is strong. Medical surgical masks can also be used to prevent flu.

“Medical surgical mask” is (YY 0469-2011), and “Disposable medical mask” is (YY / T 0969-2013).

Disposable medical masks can prevent general spray splashing, but have no protective effect against smog, aerosols, etc., throw away after use, the price is cheaper.

YZB refers to the medical device enterprise registration standard, that is, the product standard formulated by the enterprise itself, which can be inquired at the State Drug Administration.

N95 is a mask level, you must remember the model 1860 / 1870+ when purchasing, or anti-virus, surgical, flu-fighter, otherwise it is useless for anti-virus infection.

The biggest feature of the N95 mask is that it can prevent the spread of droplets caused by patients’ body fluids or blood splashes. The size of the droplets is 1 to 5 microns in diameter. The United States Occupational Safety and Health Administration (OSHA) stipulates that for medical institutions, medical personnel exposed to tuberculosis bacteria must wear masks above the N95 standard.

Taking coronavirus as an example (2019-nCoV is a kind of coronavirus), the average diameter is about 100nm, that is 0.1.um, plus the propagation vector, such as droplet diameter is about 1-5um, and N95 filters 0.3um non-oily particles Effect ≥95%, N95 can achieve effective filtration.

It is worth noting that when choosing an N95 mask, try to choose an N95 mask without a breathing valve. The analysis results show that there is no significant difference between N95 protective masks and medical surgical masks in the prevention of infectious acute respiratory infections in clinical settings. But it also said that the N95 mask is better sealed.

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