Since the new crown epidemic, wearing masks has become everyone's daily posture. At present, in addition to ordinary disposable medical masks, N95 and KN95 masks have the highest attention rate. What is the difference between N95 and KN95 masks? According to domestic media reports, the director of the Disinfection Division of the Shanghai Centers for Disease Control and Prevention¡¯s Infectious Disease Prevention and Control Institute introduced that KN95 masks are China¡¯s standard for particle filtration efficiency (greater than or equal to 95%), while N95 masks are the American mask standard. The code names are different, but the actual particle filtration efficiency is the same.
However, it should be noted that medical staff, especially those directly exposed to new coronary pneumonia, use one of the KN95 masks, but not all KN95 masks are medical protective masks. Medical staff wearing medical protective masks may come into contact with the patient, the patient may sneeze or cough, or there may be some splashes when the patient is intubated. General protective masks cannot stop this kind of splashing.
Medical staff may wear a mask for four hours a day. Wear a mask while breathing. There will be water vapor in the mouth and the mask will get wet. In addition to particle filtration efficiency, medical protective masks must do synthetic blood penetration experiments and moisture resistance experiments.
Therefore, to determine whether a mask can be used by frontline medical staff, all you have to do is to look at three tests.