There are no products to list in this category.
A medical mask is a medical device that covers the wearer's mouth and nose with a filter that protects against inhalation of liquid aerosols (the degree of protection, i.e. the size of filtered particles depends on the quality of the filter), but does not protect against solid aerosols.
It should also be borne in mind that a medical mask leaves the wearer's conjunctiva (eyes) unprotected from dangerous aerosols, therefore the mask is primarily intended to protect people surrounding the wearer of the mask. The difference between a medical mask and a respirator lies in the impossibility of a medical mask, unlike a respirator, to block small particles of solid aerosols (the size of particles filtered by a respirator may differ depending on the model). And also in the absence of a valve that facilitates exhalation and a loose fit to the shape of the face.
A modern mask usually consists of a filter layer, which is located between the two outer layers (three-layer masks), as well as a flexible aluminum insert that ensures the mask fits to the shape of the nose. The mask is fixed to the face by means of elastic ear loops or ties.
A close analogue in terms of the degree of filtration to a medical mask are homemade fabric masks made of four layers of fabric. Russian sanitary standards require the production of such fabric masks as a replacement for medical masks in the event of a shortage of the latter, as well as sterilize fabric masks by boiling. Conventional medical masks are made using synthetic materials that are easily damaged by temperature or detergents, therefore, they have a special procedure for sterilization using ultraviolet radiation and moderate heating.
The World Health Organization has issued guidelines and updated them. The document, in addition to recommendations for the use of masks, indicated situations when their use is not necessary, for example, in medical institutions, in rooms where treatment and diagnostics are not carried out. The negative impact of wearing masks on people was also noted: the appearance of dermatitis, acne, headache due to a high concentration of carbon dioxide, difficulty in communication, a false sense of security. Studies have found significant reductions in blood oxygen levels when masks are used by healthcare professionals. It was pointed out that the elderly, and those with asthma; chronic diseases of the respiratory system, etc., it will be very difficult to use masks, as well as for people living (being) in a hot humid microclimate. However, without any justification, Rospotrebnadzor did not take into account the presence of medical contraindications to the use of masks.
The Chinese Ministry of Health has published guidelines for the selection and use of masks. Wearing a mask in public places is mandatory. You do not need to wear a mask if you are at home, outdoors, in crowded or well-ventilated areas. The mask should be worn immediately if people are approaching you. If you cough or sneeze, do not use a respirator with a valve, as you will breathe out the infected aerosol through the valve and infect others. For this reason and because disposable masks are easier to breathe, they are recommended instead of respirators. N95 respirators are recommended if you enter a high-risk area where there are definitely people infected with coronavirus. Moreover, if your relative is sick with coronavirus, then you should also wear a disposable mask without a valve, since with a significant probability you will also get sick and it is important not to infect others.
The duration of wearing the mask varies from 2 to 6 hours, depending on the external conditions. During epidemics or in medical institutions, it is recommended to use the mask for no more than two hours. If the mask is used to protect against some man-made factors, for example from smog, then the wearing time can be up to 6 hours