Original title: Medical surgical mask, N95, KN95 mask, 3m mask, a little dizzy What is a medical surgical mask? What are N95 and KN95 masks? What is a 3m mask? I can't tell the difference clearly. The surgical mask is a mask worn by medical staff at work, mainly used in medical outpatient, laboratory, operating room and other high-demand medical environment, with relatively high safety factor and strong resistance to bacteria and viruses. Surgical mask can also be used to prevent the spread of influenza and respiratory diseases. Although it can not reach 95% filtration, it can prevent liquid penetration. Because its tightness with the face is not as good as that of medical protective masks, it is generally not used for high-risk operation protection, but it can meet the common risk operation. The N95 mask is one of nine NIOSH (National Institute for Occupational Safety and Health) certified particulate masks. N "means not resistant to oil." 95 "means that the particle concentration inside the mask is more than 95% lower than that outside the mask when exposed to the specified number of special test particles. The value of 95% is not an average,KN95 Mask with Fast Shipping, but a minimum. The protection grade of N95 means that under the testing conditions specified by NIOSH standard, the filtering efficiency of mask filter material to non-oily particles (such as dust, acid mist, paint mist, microorganisms, etc.) reaches 95%. Expand the full text N95 is not a specific product name, as long as it meets the N95 standard and passes the NIOSH review, Against Bacteria Breathable KN95 Face Mask ,Medical Disposable Coverall, it can be called "N95 mask". There is no "N95" in China's GB19083 standard, but "Grade 1", "Grade 2" and "Grade 3" are used to express the filtration efficiency grade. Generally, Grade 1 can meet the requirements of "N95/KN95". That is to say, as long as any "medical protective mask" meets the GB19083 standard, it has absolutely reached the filtration efficiency of N95 and KN95. However, KN-type masks conforming to GB2626 can not be used for medical operations, especially for high-risk operations such as tracheotomy and tracheal intubation, because they can not guarantee that the masks are not wet. Therefore, although KN95 masks achieve filtering effect, they can not be used in the first-line medical staff to fight against the new pneumonia because they can not prevent liquid penetration. The respirator above Grade 1 (N95) conforming to GB19083 can not only achieve 95% filtration, but also prevent liquid penetration, and can be used for various operations in medical institutions. That is to say, it is suitable for the first-line medical staff to fight against the new pneumonia. 3m masks refer to all mask products produced by 3m Company, which can be divided into medical masks, particulate protective masks and comfortable and warm masks, each of which has different protective emphasis. 3m medical protective masks are divided into domestic and imported, with the protective performance of surgical mask and particulate protective masks, which are specially used in hospitals to filter particulate matter in the air and block droplets, blood, body fluids and secretions. Disposable surgical mask can meet many requirements, for ordinary people,Medical Disposable Coverall, the correct wearing of disposable surgical mask can achieve a certain purpose of prevention, that is to say, ordinary people can wear disposable surgical mask to prevent virus infection. Return to Sohu to see more Responsible Editor:. zjyuan-group.com