Abstract
Objective:Test a device that can improve upon the seal of filtering face mask respirators (FFRs).Methods:A 3-D prototype for a fit improvement frame (FIF) was created and quantitative fit testing was performed for FFRs with and without the FIF.Results:Thirty eight volunteers underwent fit testing. The overall fit pass rate was 100% for the 3M model 1860 masks, 50% for the 3M model 8511 masks, 13% for the BYD CARE model DE2322, and 7% for the Honeywell DC300N95. When using the FIF the overall passing rate increase to 87% for the DE2322 + FIF (P < 0.01) and for the DC300N95 + FIF the passing rate increase to 73% (P < 0.01)Conclusion:The FIF is effective in improving the mask fit of a common flat fold N95 masks and potentially other N95 masks.
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