Currently, surgical masks are not as complicated as we think. In fact, there are only three kinds of masks:
The first is the disposable surgical mask that we all see the most. Simply put, it is also the most common surgical mask, the protective ability of nature is not as good as the next two, there is no standard above the mask any words, just for general medical environment wear use.
For example, if doctors do not meet special patients or in special places, they do not belong to special departments. When they treat patients, they will wear this kind of disposable surgical mask.
So what does it do? It has the function of filtering more than 95% bacteria, but it is not impermeable, so doctors or nurses in the routine injection, puncture or liquid change, this kind of operation is generally not the occurrence of blood, fluid and other spillage, that will use this more common surgical mask;
Second, medical surgical mask. This is actually with ordinary disposable surgical mask the biggest difference is that its sealing is better, for the prevention of aerosol bacteria better, but also anti-penetration, there are more strict particle filtration requirements, must be ≥30%!
Like our doctor again after entering the operating room, there is a risk of respiratory tract infection, surgery, dressing change, it is likely to occur the patient's blood, body fluids, such as spray, this time you need to wear this medical surgical mask!
Third, the mask of medical protection: this is a kind of medical mask with the highest level of protection, such as SARS, highly pathogenic avian influenza, plague and so on also must wear this kind of mask, basically can reach the level of N95, at the same time is even the haze so small particles are able to block!
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