Document Detail

Effect of exhaled moisture on breathing resistance of N95 filtering facepiece respirators.
MedLine Citation:
PMID:  20522519     Owner:  NLM     Status:  In-Process    
This study evaluated the effect of exhaled moisture on the breathing resistance of three classes of filtering facepiece respirators (FFR) following 4 h of continuous wear at a breathing volume of 40 l min(-1), utilizing an automated breathing and metabolic simulator as a human surrogate. After 4 h, inhalation and exhalation resistance increased by 0.43 and 0.23 mm of H(2)O pressure, respectively, and average moisture retention in the respirators was 0.26 ml. Under ambient conditions similar to those of the current study, and at similar breathing volumes, it is unlikely that exhaled moisture will add significantly to the breathing resistance of filtering facepiece respirators (FFR) over 4 h of use.
Raymond J Roberge; Emily Bayer; Jeffrey B Powell; Aitor Coca; Marc R Roberge; Stacey M Benson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.     Date:  2010-06-03
Journal Detail:
Title:  The Annals of occupational hygiene     Volume:  54     ISSN:  1475-3162     ISO Abbreviation:  Ann Occup Hyg     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0203526     Medline TA:  Ann Occup Hyg     Country:  England    
Other Details:
Languages:  eng     Pagination:  671-7     Citation Subset:  IM    
National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, Pittsburgh, PA 15236, USA.
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