Author: T. Hans Derr; Melissa A. James; Chad V. Kuny; Prem P. Kandel; Matthew D. Beckman; Kevin L. Hockett; Mark A. Bates; Moriah L Szpara
Title: Aerosolized Hydrogen Peroxide Decontamination of N95 Respirators, with Fit-Testing and Virologic Confirmation of Suitability for Re-Use During the COVID-19 Pandemic Document date: 2020_4_22
ID: d1crwbuz_19
Snippet: Several respirator models were included in the respirator fit-test process ( Table 1) . As a control to verify each respirator type could be fitted with the selected male and female subjects, nondecontaminated respirators were qualitatively fit-tested (QLFT) with subjects using the Occupational Safety and Health Administration (OSHA) qualitative fit test (QLFT) protocol (saccharine challenge) described at the OSHA Respiratory Protection Standard .....
Document: Several respirator models were included in the respirator fit-test process ( Table 1) . As a control to verify each respirator type could be fitted with the selected male and female subjects, nondecontaminated respirators were qualitatively fit-tested (QLFT) with subjects using the Occupational Safety and Health Administration (OSHA) qualitative fit test (QLFT) protocol (saccharine challenge) described at the OSHA Respiratory Protection Standard (29 CFR 1910.134) (12) . This included several exercises to challenge respirator fit, over an approximate 8 minute, 30 second period. Additionally, quantitative fit-testing (QNFT) was conducted using OSHA protocol requirements using a T.S.I, Inc PortaCount Pro+ Model 8038 Fit Tester. This latter method employs condensation nucleus or particle counting technology (CNC or CPC) to measure aerosol concentration outside and inside the facepiece to determine a user fit-factor (13).
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