The feasibility of using a direct measure of respirator leakage flow rate as a quantitative index of respirator face seal fit has been explored through the use of a new controlled negative pressure method.
The method is based on exhausting air from a temporarily sealed respirator facepiece at a rate sufficient to generate and then sustain a constant negative pressure inside the facepiece while the wearer holds his breath.
The feasibility of using the new method to quantify respirator fit was assessed in a preliminary study that compared its performance with a quantitative fit test method based on the use of dichlorodifluoromethane as a challenge agent.
Mots-clés Pascal : Exposition professionnelle, Masque protection, Appareil respiratoire, Pression négative, Méthodologie, Test, Hydrocarbure halogéné, Méthane(dichloro difluoro), Fréon 12
Mots-clés Pascal anglais : Occupational exposure, Protective mask, Respiratory system, Negative pressure, Methodology, Test, Halocarbon
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 91-0530321
Code Inist : 001D16C06. Création : 199406.