Veille documentaire MTPH

Médecine du travail du personnel hospitalier

Impact of multiple consecutive donnings on filtering facepiece respirator fit

Auteur     Michael S Bergman
Auteur     Dennis J Viscusi
Auteur     Ziqing Zhuang
Auteur     Andrew J Palmiero
Auteur     Jeffrey B Powell
Auteur     Ronald E Shaffer
Résumé     BACKGROUND A concern with reuse of National Institute for Occupational Safety and Health-certified N95 filtering facepiece respirators (FFRs) is that multiple donnings could stress FFR components, impairing fit. This study investigated the impact of multiple donnings on the facepiece fit of 6 N95 FFR models using a group of 10 experienced test subjects per model. METHODS The TSI PORTACOUNT Plus and N95 Companion accessory were used for all tests. After qualifying by passing a standard Occupational Safety and Health Administration fit test, subjects performed up to 20 consecutive tests on an individual FFR sample using a modified protocol. Regression analyses were performed for the percentage of donnings resulting in fit factors (FFs) ≥100 for all 6 FFR models combined. RESULTS Regression analyses showed statistical significance for donning groups 1-10, 1-15, and 1-20. The mean percentage of donnings with an FF ≥100 was 81%-93% for donning group 1-5, but dropped to 53%-75% for donning group 16-20. CONCLUSIONS Our results show that multiple donnings had a model-dependent impact on fit for the 6 N95 models evaluated. The data suggest that 5 consecutive donnings can be performed before FFs consistently drop below 100.
Publication     American Journal of Infection Control
Volume     40
Numéro     4
Pages     375-380
Date     May 2012

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