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Protection respiratoire. Réaliser des essais d'ajustement
Lors du processus de sélection d'un appareil de protection respiratoire, il est indispensable de s'assurer que le modèle choisi est adapté à son porteur en réalisant un essai d'ajustement. Cette brochure décrit l'objectif des essais d'ajustement, les différentes méthodes d'essai existantes, le rôle de l'opérateur d'essai d'ajustement. Elle précise les critères permettant de considérer l'étanchéité au visage comme satisfaisante. Source: http://www...
Review of fit test pass criteria for Filtering Facepieces Class 3 (FFP3) respirators
Respiratory Protective Equipment (RPE) is available in a range of types which often include a tight-fitting facepiece which must fit the wearer's face well for the RPE to work effectively. Good fit must be demonstrated by fit testing. In this study, 25 volunteer test subjects wearing tight-fitting FFP3 (randomly selected from 9 different models) underwent four fit tests (Bitrex qualitative taste test, Portacount particle counting with and without the N95 companion technology and the laboratory chamber method), in random order, according to methodology given in HSE guidance 282/28. The selected...
Component Analysis of Respirator User Training
Respirators must be properly used to be effective. In an experimental protocol, 145 subjects were trained and then observed donning and doffing respirators. Filtering facepiece and dual cartridge half face mask types were studied. Subjects were then tested for knowledge and for proper performance using video recording analysis. Knowledge tests showed adequate learning, but performance was often poor. Inspection, strap tension (half mask), seal checking, and avoiding mask contact during doffing were particularly problematic. Mask positioning was generally well done. Correlation between knowledge...
Head-and-face dimensions for current Chinese workers show differences from the current U.S. standard headforms
The objective of this study was to develop headforms that represent today's Chinese workers. Mean facial dimensions from manual measurements were computed to target the ideal facial dimensions for each size category and used to develop 3-D digital headforms. These new headforms represent the facial size and shape distribution of current Chinese workers and may be useful for respirator research and development. The Chinese medium headform has a wider face width, shorter face length, and smaller nose protrusion when compared with the current U.S. standard headforms. Upon validation, it may be...

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