(Photo: Doctor Do of Union Medical College) surgical mask Surgical mask is a medical mask commonly used in operating rooms and other environments with the risk of body fluid and blood splashing, which can prevent blood and body fluid from passing through the mask to contaminate the wearer. At the same time, the filtering efficiency of bacteria should not be less than 95%,Medical Quickly Delivery Antivirus Coverall, but the filtering efficiency of particles is limited, and most of them are rectangular design, so the tightness with the face is not as tight as that of medical protective masks. When purchasing, we must pay attention to the masks with the words "surgical mask" or the implementation standards. The latest executive standard of surgical mask is the pharmaceutical industry standard of the People's Republic of China, Technical Requirements for surgical mask, YY-0469-2011, which was issued on December 31, 2011 and implemented on June 1, 2013. Disposable medical mask There are many names of ordinary medical masks, and the medical masks without the words "protection" and "surgery" on the name are all ordinary medical masks. This level of mask is generally not required to have a barrier effect on blood, so it is only used in general medical environment. The current industry standard for ordinary medical masks is Disposable Medical Masks YY/T 0969-2013. Ordinary mask Ordinary masks may be made of cotton cloth, gauze, sponge, Virus Prevention Mask 3 Ply with Earloop ,KN95 Mask for Epidemic Prevention and Control, canvas and velvet, because the material itself is not dense enough to prevent infection. As for how to choose, first of all, at a press conference on the prevention and control of the "pneumonia epidemic infected by the new coronavirus" yesterday afternoon, Academician Zhong Nanshan said: "It is not necessary to wear N95, because these viruses do not actually exist alone, they often exist in droplets. General masks, surgical masks and so on can still block most of the viruses with droplets from entering the respiratory tract. Although from the point of view of protective effect alone, N95 mask has the strongest protective effect, followed by surgical mask, and then ordinary medical masks. However, N95 mask, there are also some actual situations, such as uncomfortable use, difficult purchase and high price. Therefore, there is no need to snap up the N95 that can not be worn, which is equal to wearing in vain. If you go to general open-air public places and do not contact with patients, you can choose to wear surgical mask without excessive protection, but if you will contact patients suspected of respiratory tract infection, you should wear N95 masks. 02 How to wear a mask correctly? How to wear N95 respirator Wearing method of medical surgical mask 03 What should I do if I can't buy a mask? In fact, in addition to masks and medicines, we can take the following measures to prevent infection during the Spring Festival: 1. If not necessary, try to avoid going to crowded and airtight public places. Because even in the season of pneumonia epidemic, it is possible to catch pneumonia by staying in the crowd for too long; 2. Wash hands frequently, use soap and hand sanitizer to clean hands before meals and after defecation or touching public articles; change and wash clothes worn outside in time after returning home. 3. Keep the environment ventilated. Open more windows at home to keep the air circulating for about 30 minutes each time. 4. Strengthen exercise and improve self-immunity. Spring Festival gatherings should be restrained, and immunity should not be reduced due to excessive staying up late and fatigue, which will increase the risk of self-infection! 04 How often do you need to change the mask? In order to prevent infection, some people may wear medical masks all day long, but this will make the nasal mucosa fragile, lose the original physiological function of the nasal cavity, and reduce resistance. Therefore, in places with low population density and good ventilation, it is not necessary to wear masks. It should be reminded that the protective effect of any type of mask is time-limited and must be replaced regularly. It is recommended to replace the mask every 2 to 4 hours. If the mask is contaminated, it should be replaced at the first time. All masks are disposable and are not recommended for reuse. Discard N95 mask if damaged or deformed. That is: no longer forms an effective seal on the face; becomes wet or visibly dirty; becomes more difficult to breathe; or becomes contaminated with blood, respiratory or nasal secretions, or other bodily fluids of the patient, all need to be discarded. 05 How to wear masks for special groups? When pregnant women wear protective masks, they should pay attention to their own conditions and choose products with better comfort. Before wearing, you should consult a professional doctor to confirm that your physical condition is suitable. The elderly and patients with chronic diseases have different physical conditions, such as patients with heart and lung diseases will cause discomfort after wearing, and even aggravate the original condition,KN95 Face Mask, these people should seek professional guidance from doctors. Children are in the stage of growth and development, and their faces are small. It is generally recommended that children who are too young wear masks. If necessary, they should choose special protective masks for children produced by regular manufacturers. Return to Sohu to see more Responsible Editor:. zjyuan-group.com