Characterization of a Hooded Human Exposure Apparatus for Inhalation of Gases and Aerosols

Details

• Personal Author:
  Kline JN ; Mehaffy J ; O'Shaughnessy PT ; Sigurdarson S ; Watt J
• Description:
  A human exposure apparatus was designed to administer a gas and/or aerosol directly to the subject's face. This apparatus utilized a hood associated with a powered air-purifying respirator. The design criteria included the need to maximize subject comfort, maintain consistent atmospheres of a gas or dust within the hood, and the accurate use of direct-reading instruments to monitor exposure levels. An 83-L drum was used to pre-mix the gas or aerosol with the main dilution air prior to entering the hood worn by the subject. A clear plastic oxygen tent, ventilated with room exhaust air, was used to contain contaminants exiting the hood. Bypass valves were added to allow for a startup period during which contaminant concentration levels were allowed to stabilize prior to exposing the human subject. Results from characterization studies demonstrated that the system adequately contained contaminants within the oxygen tent, provided adequate mixing of contaminant and dilution air, produced stable contaminant concentrations over time, and was responsive to sudden changes in contaminant generation rate. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Movements Air Pollutants, Occupational Air Pollution Air Pollution, Indoor Education Environment Environmental Exposure Environmental Health Environmental Monitoring Environmental Pollution Occupational Health Risk Assessment Risk Factors Safety Stress, Psychological

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• Keywords:
  Aerosol-particles Aerosol-sampling Air-contamination Air-filters Air-flow Air-monitoring Air-purification Air-quality Air-quality-control Air-quality-measurement Air-quality-monitoring Author Keywords: Aerosol Delivery Direct-reading Instruments Environmental-contamination Environmental-control Environmental-control-equipment Environmental-exposure Environmental-factors Environmental-hazards Environmental-health Environmental-health-monitoring Environmental-physiology Environmental-pollution Environmental-protection Environmental-stress Exposure-assessment Exposure-chambers Exposure-levels Exposure-limits Exposure-methods Gas-detectors Gas-filters Gas-meters Gas-mixtures Gas-sampling Gas Delivery Gases Human Exposure Apparatus Risk-analysis Risk-factors

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Cooperative Agreement ; Grant
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; Illinois ; Iowa ; OSHA Region 5 ; OSHA Region 7 ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  161-166
• Volume:
  1
• Issue:
  3
• NIOSHTIC Number:
  nn:20035873
• Citation:
  J Occup Environ Hyg 2004 Mar; 1(3):161-166
• Contact Point Address:
  P. T. O'Shaughnessy Department of Occupational and Environmental Health, University of Iowa, Iowa City, Iowa
• Email:
  Patrick-oshaunessy@uiowa.edu
• Federal Fiscal Year:
  2004
• Performing Organization:
  Colorado State University - Fort Collins
• Peer Reviewed:
  True
• Start Date:
  20010930
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20030929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:518a8d71f1cab04ac103d724adfd202cb0ab10ea9c7707fc68839ec4ce7ddbb73a6b7a75490db7d49c27fe9a511618c6f56e15bd84a8ff788739e20b2dccc891
• Download URL:
  https://stacks.cdc.gov/view/cdc/187557/cdc_187557_DS1.pdf
• File Type:
  [PDF - 1.56 MB ]