Effect of Exhaled Moisture on Breathing Resistance of N95 Filtering Facepiece Respirators

Details

• Personal Author:
  Bayer E ; Benson SM ; Coca, Aitor ; Powell JB ; Roberge MR ; Roberge RJ
• Description:
  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 H2O 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. [Description provided by NIOSH]
• Subjects:
  Occupational Health Personal Protective Equipment Respiratory Protective Devices Respiratory System Safety Ventilation
• Keywords:
  Author Keywords: Breathing Resistance Breathing Filtering Facepiece Respirators Filters Moisture N95 Personal-protective-equipment Respirators Respiratory-protection Respiratory-protective-equipment Respiratory Protective Equipment

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• ISSN:
  0003-4878
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  54
• Issue:
  6
• NIOSHTIC Number:
  nn:20036989
• Citation:
  Ann Occup Hyg 2010 Aug; 54(6):671-677
• Contact Point Address:
  Raymond J. Roberge, National Institute for Occupational Safety and Health, National Personal Protective Technology Laboratory, Pittsburgh, PA 15236, USA
• Email:
  rroberge@cdc.gov
• Federal Fiscal Year:
  2010
• NORA Priority Area:
  Healthcare and Social Assistance
• Peer Reviewed:
  True
• Source Full Name:
  Annals of Occupational Hygiene
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:d13a52c27ca6414c882f7fd33b0e4e4797113b373be6dd7fd4bb10f5840769d352b1c13924cbfa7249928b767a4636c0addc88feee62756e418cb7966546d902
• Download URL:
  https://stacks.cdc.gov/view/cdc/188175/cdc_188175_DS1.pdf
• File Type:
  [PDF - 80.02 KB ]