To provide the best protection against COVID-19, the fitting of a face mask is more important in some cases than the material from which it is made, according to a study which suggests new methods for manufacturers to test the effectiveness of masks.
Although studies across the COVID-19 pandemic have shown the importance of wearing a face mask in slowing the spread of the cornea virus, the researchers from Cambridge University said in the UK that there is a lack of understanding of the role that very appropriate role plays in ensuring effectiveness.
The study, published in the journal PLoS ONE, conducted a series of appropriate tests and found that when a high-performance face mask – such as an N95 mask – is not properly equipped, it does not perform better than cloth mask.
According to the researchers, small differences in facial features, such as the amount of fat under the skin, make big differences in how well a mask responds.
They said the appropriate diagnostic method used in many health care settings has high failure rates, as it can be difficult or impossible to locate the consumer.
The scientists hope their findings will help develop new relevant tests that are fast and reliable for future public health emergencies.
“We know that if there is no good seal between the mask and the wearer’s face, a lot of aerosols and droplets will leak through the top and sides of the mask, as many people who wear glasses will know,” said the first study. author Eugenia O’Kelly from Cambridge University.
In the study, seven participants initially evaluated N95 and KN95 masks by performing an appropriate study.
Participants then underwent an appropriate quantitative test – which uses a counting device to measure the inside and outside grains of the mask – while wearing N95 and KN95 masks, face masks. strange and strange faces.
According to the scientists, N95 masks offered higher levels of protection than the other categories of masks tested.
However, they said most N95 masks did not fit the participants well enough.
The experts found that, when properly equipped, N95 masks filtered more than 95 percent airborne particles, offering better protection.
But they said in some cases, poorly equipped N95 masks were nothing but surgical or tissue masks.
“It is not enough to assume that one model of N95 will fit the majority of the population. The most suitable mask we have seen, the 8511 N95, fits only three out of it. the seven who took part in our study, “O’Kelly said.
The researchers said that the width of the mask’s flange – the width of the material that communicates with the skin – may be an essential feature to be appropriate.
Grooves that corresponded to the largest number of partners were usually with wider and more flexible flanges around the border, they said.
Small face differences have a significant effect on size response, the study noted.
“Knitting the face perfectly is a difficult technical challenge and, as our research has shown, small differences such as a centimeter wider nose or slightly more complete cheeks can make or break a mask,” said O ‘ Kelly.
The scientists believe their results will be useful for those working on new technologies and programs to evaluate appropriately.
They hope the findings would highlight the importance of appropriateness in clinical-grade masks, especially if the masses are to be widely used.