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How surgical masks classify ?
2020/03/25
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Surgical masks are designed to keep operating rooms sterile, preventing germs from the mouth and nose of a wearer from contaminating a patient during surgery. Although they have seen a rise in popularity among consumers during outbreaks such as the coronavirus, surgical masks are not designed to filter out viruses, which are smaller than germs.
There are four levels of ASTM certification that surgical masks are classified in, depending on the level of protection they provide to the person wearing them:
Minimum protection face masks are meant for short procedures or exams that won’t involve fluid, spray, or aerosol.
Level 1 face masks often feature ear loops and are the general standard for both surgical and procedural applications, with a fluid resistance of 80 mmHg. They’re meant for low-risk situations where there will be no fluid, spray, or aerosol.
Level 2 masks, with 120 mmHg fluid resistance, provide a barrier against light or moderate aerosol, fluid, and spray.
Level 3 face masks are for heavy possible exposure to aerosol, fluid and spray, with 160 mmHG fluid resistance.
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