Impact of multiple consecutive donnings on filtering facepiece respirator fit

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• 作者：Michael S. Bergman ; MS^a ; Dennis J. Viscusi ; BS^b ; Ziqing Zhuang ; PhD^b ; Andrew J. Palmiero ; MHS^a ; Jeffrey B. Powell ; MS^b ; Ronald E. Shaffer ; PhD^b ; ^{RShaffer@cdc.gov}
• 关键词：Respiratory protection ; Fit test ; Health care worker ; N95 respirator fit ; Multiple donnings ; Respirator reuse
• 刊名：American Journal of Infection Control
• 出版年：2012
• 出版时间：May, 2012
• 年：2012
• 卷：40
• 期：4
• 页码：375-380
• 全文大小：229 K

文摘

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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) ?00 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 ?00 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.