Comparison of six respirator fittest methods with an actual measurement of exposure using fullfacepiece respirators

Details

• Personal Author:
  Coffey, Christopher C. ; Jensen P ; Lawrence R ; Zhuang Z ; Coffey, Christopher C. ; Jensen P ; Lawrence R ; Zhuang Z
• Description:
  A recent study found that some quantitative fittest (QNFT) methods may be predictive of actual half-mask respirator performance. The purpose of this study was to determine whether the same degree of predictability could be found using full-facepiece respirators. Fit-factors from six QNFT methods performed under laboratory conditions were compared with the exposure to 1, 1, 2-trichloro-1, 2, 2-trifluoroethane [Freon-113] assessed by exhaled breath analysis. The six QNFT methods were 1) low flow, flush probe corn oil (CLF); 2) high flow, deep probe corn oil (CHD); 3) controlled negative pressure (CNP); 4) ambient aerosol, 10 minutes, six exercises (AA1); 5) ambient aerosol, 30 minutes, 17 exercises (AA2); and 6) high flow, deep probe ambient aerosol (AAHD). Each method was conducted on a sample of 30 subjects with three replications. Each subject randomly selected 3 of 10 organic vapor/P100 full-facepiece respirators. The exhaled breath of each subject exposed to 500 ppm of Freon-113 was first evaluated at 30 minutes post-exposure. This characterization was then used to estimate the actual exposure to Freon-113 during correlation testing. Fit-factors resulting from the QNFT protocols were then individually correlated with the Freon-113 exposures using the coefficient of determination, R2. Statistically significant correlation between fit-factors and actual exposure doses of Freon-113 was found with some QNFT methods. But the highest R2 value was only 0.20. The correlations were not as strong as those observed with the half-mask respirators in the previous study. The results of this study suggest that some QNFT methods can predict actual performance of full-facepiece respirators. [Description provided by NIOSH]
• Subjects:
  Aerosols Air Movements Air Pollutants, Occupational Air Pressure Environmental Monitoring Ethane Laboratories Manufacturing And Industrial Facilities Occupational Health Personal Protective Equipment Respiratory Protective Devices Respiratory System Safety Workplace

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• Keywords:
  Air-flow Air-pressure Air-purifying-respirators Air-quality-measurement Air-sampling Breathing Equipment-reliability Ethanes Exposure-assessment Face-masks Gas-chromatography Humans Laboratory-testing Materials-testing Measurement-equipment Organic-vapors Personal-protective-equipment Quantitative-analysis Respirators Respiratory-equipment Respiratory-protection Respiratory-protective-equipment Simulation-methods Workplace-studies

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• Publisher:
  American Industrial Hygiene Association
• Document Type:
  Text
• Genre:
  Abstract or Summary ; Abstract or Summary
• Place as Subject:
  Florida ; OSHA Region 3 ; OSHA Region 4 ; Virginia ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRDS - Division of Respiratory Disease Studies ; HELD - Health Effects Laboratory Division ; DRDS - Division of Respiratory Disease Studies ; HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  86
• NIOSHTIC Number:
  nn:20041662
• Citation:
  American Industrial Hygiene Conference and Exposition, May 20-25, 2000, Orlando, Florida. Fairfax, VA: American Industrial Hygiene Association, 2000 May; :86
• CAS Registry Number:
  CFC 113 (CAS RN 76-13-1) ; CFC 113 (CAS RN 76-13-1)
• Federal Fiscal Year:
  2000
• Peer Reviewed:
  False
• Source Full Name:
  American Industrial Hygiene Conference and Exposition, May 20-25, 2000, Orlando, Florida
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:648c08e5bab80f391952ef8593bb96bf78ec5d6064ae536abf9740e68c16a14888c07a692b87df1988e997c64f9dd8a9aa8893495b3224e1f34a905611b2952d
• Download URL:
  https://stacks.cdc.gov/view/cdc/194161/cdc_194161_DS1.pdf
• File Type:
  [PDF - 1.24 MB ]