Study on the Fit Testing of N95 Medical Protective Masks Using Different Methods and Its Influencing Factors

ZHOU Fengling; WANG Jialu; LIU Shenshen; DONG Yumei

doi:10.13730/j.issn.2097-2148.2025.10.016

Abstract：Objective To explore the influencing factors of the wearing fit of N95 medical protective masks among clinical medical staff,and to provide a basis for the correct use of medical protective masks to improve protective effects.Methods Medical staff in clinical wards were included in the test scope,after wearing N95 medical protective masks,they were first tested for their own fitness,after passing the test,the mask fitness tester was used for rapid detection and quantitative fitness test to detect the mask wearing fitness.Results A total of 93 people participated in the subjective e-valuation questionnaire,and 88 people thought that the fitting of masks was qualified,with a pass rate of 94.62％.The self-test results of 213 people were qualified,and the pass rate was 100.00％;a total of 356 rapid fitness tests were per-formed by 213 people,and 219 of them were qualified,with a pass rate of 61.52％;156 people who were qualified in the rapid fitness test performed 172 times of quantitative fitness tests,and 129 of them were qualified,with a qualified rate of 75.00％.There were significant differences in the passing rates of turning head from side to side and nodding head up and down during the quantitative fitness test and the passing rates of the first normal breathing(P＜0.05).The pass rate of subjective evaluation(94.62％)and the pass rate of quantitative fitness test(75.00％)between the two groups were sta-tistically significant(x2=13.214,P＜0.001).Conclusion The fit test can help the N95 respirators to know the fit sta-tus and the high-risk movements during wearing.Frequent head turning,head nodding and so on should be avoided to re-duce the risk of infection,it can enhance the fit of masks and reduce the risk of infection.