1. Comparing the fit of N95, KN95, surgical, and cloth face masks and assessing the accuracy of fit checking
- Author
-
P. John Clarkson, Eugenia O'Kelly, James Ward, Anmol Arora, Sophia Pirog, O’Kelly, Eugenia [0000-0002-4748-3957], Arora, Anmol [0000-0003-4881-8293], Ward, James [0000-0002-0362-4711], Clarkson, P. John [0000-0001-8018-7706], Apollo - University of Cambridge Repository, O'Kelly, Eugenia [0000-0002-4748-3957], and Clarkson, P John [0000-0001-8018-7706]
- Subjects
Male ,Viral Diseases ,business.product_category ,Epidemiology ,Computer science ,Fit testing ,Engineering and technology ,030312 virology ,030501 epidemiology ,computer.software_genre ,Respirators ,Biochemistry ,Rendering (computer graphics) ,Fats ,Medical Conditions ,Statistics ,Respirator ,Virus Testing ,0303 health sciences ,Multidisciplinary ,Textiles ,Masks ,Middle Aged ,Lipids ,Face masks ,Infectious Diseases ,Medicine ,Female ,Anatomy ,0305 other medical science ,Biotechnology ,Research Article ,Adult ,Coronavirus disease 2019 (COVID-19) ,Adolescent ,N95 Respirators ,Science ,Bioengineering ,Nose ,Machine learning ,03 medical and health sciences ,Young Adult ,Diagnostic Medicine ,Occupational Exposure ,Humans ,Poor correlation ,Pandemics ,Aged ,Medicine and health sciences ,Biology and life sciences ,business.industry ,SARS-CoV-2 ,COVID-19 ,Covid 19 ,FOS: Engineering and technology ,Health Care ,Surgical mask ,Health Care Facilities ,Face ,Medical Devices and Equipment ,Artificial intelligence ,business ,Head ,computer - Abstract
Introduction The COVID-19 pandemic has made well-fitting face masks a critical piece of protective equipment for healthcare workers and civilians. While the importance of wearing face masks has been acknowledged, there remains a lack of understanding about the role of good fit in rendering protective equipment useful. In addition, supply chain constraints have caused some organizations to abandon traditional quantitative or/and qualitative fit testing, and instead, have implemented subjective fit checking. Our study seeks to quantitatively evaluate the level of fit offered by various types of masks, and most importantly, assess the accuracy of implementing fit checks by comparing fit check results to quantitative fit testing results. Methods Seven participants first evaluated N95 and KN95 respirators by performing a fit check. Participants then underwent quantitative fit testing wearing five N95 respirators, a KN95 respirator, a surgical mask, and fabric masks. Results N95 respirators offered higher degrees of protection than the other categories of masks tested; however, it should be noted that most N95 respirators failed to fit the participants adequately. Fit check responses had poor correlation with quantitative fit factor scores. KN95, surgical, and fabric masks achieved low fit factor scores, with little protective difference recorded between respiratory protection options. In addition, small facial differences were observed to have a significant impact on quantitative fit. Conclusion Fit is critical to the level of protection offered by respirators. For an N95 respirator to provide the promised protection, it must fit the participant. Performing a fit check via NHS self-assessment guidelines was an unreliable way of determining fit.
- Published
- 2021