A comparison of facemask and respirator filtration test methods
| Autor: | Brandon Williams, Sarah Smit, Ronald E. Shaffer, Samy Rengasamy |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.product_category Respiratory Protective Device 02 engineering and technology Materials testing Article law.invention viral filtration efficiency (VFE) 03 medical and health sciences 0302 clinical medicine law Forensic engineering medicine surgical N95 respirator Respirator Filtration Notice business.industry NIOSH NaCl efficiency Public Health Environmental and Occupational Health N95 respirator 021001 nanoscience & nanotechnology medicine.disease 030210 environmental & occupational health Test (assessment) Bacterial filtration efficiency (BFE) particle filtration efficiency (PFE) Medical emergency 0210 nano-technology business |
| Zdroj: | Journal of Occupational and Environmental Hygiene |
| ISSN: | 1545-9632 1545-9624 |
| Popis: | NIOSH published a Federal Register Notice to explore the possibility of incorporating FDA required filtration tests for surgical masks (SMs) in the 42 CFR Part 84 respirator certification process. There have been no published studies comparing the filtration efficiency test methods used for NIOSH certification of N95 filtering facepiece respirators (N95 FFRs) with those used by the FDA for clearance of SMs. To address this issue, filtration efficiencies of “N95 FFRs” including six N95 FFR models and three surgical N95 FFR models, and three SM models were measured using the NIOSH NaCl aerosol test method, and FDA required particulate filtration efficiency (PFE) and bacterial filtration efficiency (BFE) methods, and viral filtration efficiency (VFE) method. Five samples of each model were tested using each method. Both PFE and BFE tests were done using unneutralized particles as per FDA guidance document. PFE was measured using 0.1 µm size polystyrene latex particles and BFE with ∼3.0 µm size particles containing Staphylococcus aureus bacteria. VFE was obtained using ∼3.0 µm size particles containing phiX 174 as the challenge virus and Escherichia coli as the host. Results showed that the efficiencies measured by the NIOSH NaCl method for “N95 FFRs” were from 98.15–99.68% compared to 99.74–99.99% for PFE, 99.62–99.9% for BFE, and 99.8–99.9% for VFE methods. Efficiencies by the NIOSH NaCl method were significantly (p = |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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