title: Assessing real-time performances of N95 respirators for health care workers by simulated workplace protection factors.
abstract: To assess performances of N95 respirators for Health Care Workers (HCWs) in a simulated health-care setting, we measured the Simulated Workplace Protection Factors (SWPFs) in real-time from the volunteers. A total of 49 study subjects, wearing 3 M respirator Model N95 1860 and 1860S, were fit tested using the OSHA Exercise Regimen. The test subjects were asked to perform simulated scenarios, including patient assessments, suction, and intravenous injection (IV) treatment. Two TSI PortaCount instruments continuously measured concentrations in the respirator and the room concentration. For Quantitative Fit Testing (QNFT), 36 out of 49 (73.5%) passed the fit factor (FF) criteria set at 100 and 13 (26.5%) failed. The results of QNFT were found to have a low correlation with SWPF, with R(2)=0.32. The geometric means (GM) and geometric standard deviations (GSD) of SWPF were 68.8 (1.1) for those subjects who passed and 39.6 (1.3) for those who failed. Real-time assessments of SWPF showed that lower SWPFs were; moving head up and down, and bending at the waist. This study identifies the needs for providing different sizes of respirators for HCWs and the importance of performing fit tests for HCWs regularly. And particular movements were identified as attributing factors affecting more on SWPFs.
authors: Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Republic of Korea.
authors: Hyunwook
authors: H
authors: Kim
authors: Jung-Eun
authors: JE
authors: Baek
authors: Hye-Kyung
authors: HK
authors: Seo
authors: Jong-Eun
authors: JE
authors: Lee
authors: Jun-Pyo
authors: JP
authors: Myong
authors: Seung-Joo
authors: SJ
authors: Lee
authors: Jin-Ho
authors: JH
authors: Lee
mesh_terms: D000328:Adult; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement; D009729:Nursing; D016273:Occupational Exposure / Q000517:prevention & control*; D011187:Posture; D012134:Respiratory Protective Devices / Q000592:standards*; D013647:Task Performance and Analysis; D055815:Young Adult