Impact of time and assisted donning on respirator fit

摘要: ABSTRACTThe goal of this study was to examine the impact assistance with donning and time on quantitative fit factors (FF) pass rates for subjects wearing an N95 filtering facepiece respirator (FFR) a non-certified adhesive mask. Fit were measured using two side-by-side TSI Portacount instruments sampling second-by-second simultaneous inside- outside-facepiece concentrations. Naive made visits at least one week apart. At each visit first donned either or mask without performed five-exercise fast test. They then new in proper (e.g., forming nosepiece, strap placement, etc.) second The same sequence unassisted assisted repeated other facepiece. Fifteen participated study; between ranged from 7–29 days (average 12 days). On 1 FFs ...