In people's cognition, medical surgical masks are disposable masks used in hospitals to protect against bacteria and viruses. When we buy medical surgical masks, we must first understand its characteristics and standards. Today, let's talk about the standards of medical surgical masks?
Medical surgical mask is a disposable mask worn by clinical medical staff during invasive operation. It can cover the mouth and nose of the user and provide a physical barrier to prevent the direct penetration of pathogens, microorganisms, body fluids and particles. It is composed of three layers of polypropylene material cloth and full plastic nose bar or double core nose bar, in which the melt blown cloth can play a very good filtering effect. Medical surgical masks must meet the technical standards of yy0469-2011 medical surgical masks.
1. For bacteria, the filtration efficiency should not be less than 95%;
2. The filtration efficiency of non oily particles should not be less than 30%;
3. Under the specified conditions, the pressure difference between the two sides of the mask for gas exchange should not be greater than 49 PA;
4. After 2ml synthetic blood was sprayed to the outer side of the mask at a pressure of 16.0kpa (120mmhg), there should be no penetration on the inner side of the mask.
Medical surgical mask is used to wear on the mouth and nose of medical staff in the operating room to prevent the spread of dandruff and respiratory tract microorganism to open surgical wound, and prevent the body fluid from spreading to medical personnel, and plays a two-way biological protection role.