5 Different Face Masks and Features
Video source >> Future Gear
Masks are roughly divided into two types: the first of which is surgical (medical) masks, and the other is respiratory protective masks.
Surgical masks are among the protective equipment that health workers use during surgical interventions to prevent them from infecting patients or patients themselves. Respiratory system protective masks are used to ensure job security in other areas as well as in the health sector. Dust masks with FFP classification and protective masks with N Code are also included in this category.
When entering the areas of patients suspected or diagnosed as carrying Covid-19, it is recommended to wear a surgical mask; intubation through the windpipe, wearing a nonivasive ventilator (respirator) and wearing a respiratory protective mask during interventions such as CPR.
Medics are being advised to wear masks as well as full sets of protective equipment such as gowns, glasses and visors when intervening in patients whose condition is more serious and who are being treated in intensive care units.Surgical masks are one of the most troublesome protective equipment in supply, with Covid-19 disease affecting hundreds of thousands of people at the same time.
Many organizations and states, especially the who, have issued recommendations on wearing masks in public areas, saying that the priority in the use of surgical masks should be health workers, not the general public. When it comes to infection control in the health field, more particulate filter masks are preferred. These masks also have different types and accordingly different levels of protection. The protective levels of the masks are classified by the letters FFP or N. FFP, which consists of the initials of the term "filtering facepiece" in English, represents the classification adopted by the European Union and is divided into three categories: 1, 2, 3.
The protection of FFP masks is defined as follows in the Ministry of Health's National Microbiology Standards Laboratory Safety Guide:
"FFP1 reduces the risk of infection 4 times, FFP2 10 times and FFP3 20 times when used under appropriate conditions. In other words, their filtering efficiency is 80 percent, 94 percent, and 99.97 percent, respectively, for FFP1, 2, and 3. There is no difference in protection between valves and non-respirators. Those with valves are a little easier to breathe and glasses are used with the glasses are less steamed".
The type N categorization is carried out according to the standards set by the US and therefore differs from the EU. According to the standard set in the United States, N - "not to resistant to oil", meaning not oil resistant, and masks used for medical purposes are in this category.
In the laboratory safety guide, " these are referred to as N95, N99 and N100 according to their filtering activity. As predicted, N95 respirators 'filtering efficiency is 95 percent, N99 is 99 percent, N100 is 100 percent.
The WHO recommends that the masks that health workers will use should be at least in the N95 or FFP2 category.
What is a Nano mask?
With the outbreak of Covid-19, the world's supply of masks is far from meeting demand, while medical and respiratory protective masks are disposable and lose their filter properties when they come into contact with water, prompting scientists to seek more durable solutions.
There are reports that masks with nano-filtering technology have been developed recently, especially in Asia. A group of scientists from the Korea Institute of Advanced Science and technology, based in South Korea, announced in March that they had developed a mask with nano-filtering capability that could be used by washing up to 20 times.
This mask contains a filtering technology made of "nanofibers with a diameter of 100-150 nanometers vertically or in one direction" and the Institute patented this technology. A similar mask was also developed in Shanghai, China. Sales of these masks, which have Nano-filtering technology and can be used for up to 20 washes, have recently started in China.