Effects of industrial respirators on respiratory timing and psychophysiologic load sensitivity.

Details

• Personal Author:
  Harber P ; Lew M ; SooHoo K
• Description:
  The effects of respirators on respiratory timing and psychophysiologic load sensitivity were studied in 11 volunteers in an exercise laboratory setting. Subjects were tested at five levels of treadmill exercise (from resting to peak) with and without a respirator surrogate load; the load was simulated by imposition of an inspiratory flow resistance (a single acid mist respirator cartridge) and 300 milliliters of dead space. The three groups of variables assessed included mechanical (pressure, flow, volume, oxygen consumption, heart rate), respiratory pattern, and psychophysical (load scaling sensitivity). Sensitivity to inspiratory flow/restive loads was determined by magnitude estimation, whereby a series of resistances were presented in random order and rated by the subject. Respiratory pattern was significantly affected by exercise; inspiration was prolonged, peak inspiratory flow rates were decreased, and tidal volume was increased. The respirator load, but not exercise, decreased load sensitivity at each of the exertion levels studied. Interpersonal differences in load sensitivity were large. The authors conclude that psychophysiologic sensitivity to respiratory load similar to that of industrial respirators may be significantly affected by respiratory timing and load sensitivity adaptation; poor tolerance of respirators by some workers could be related to abnormal psychophysiologic load sensitivity. [Description provided by NIOSH]
• Subjects:
  Occupational Health Personal Protective Equipment Respiratory Protective Devices Respiratory System Safety
• Keywords:
  Air Purifying Respirators Physical Exercise Physiological Function Protective Equipment Psychophysiological Testing Respiration Respiratory Protective Equipment
• ISSN:
  0096-1736
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  California ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  256-262
• Volume:
  30
• Issue:
  3
• NIOSHTIC Number:
  nn:00178713
• Citation:
  J Occup Med 1988 Mar; 30(3):256-262
• Federal Fiscal Year:
  1988
• NORA Priority Area:
  Respirators Research
• Performing Organization:
  University of California Los Angeles, Los Angeles, California
• Peer Reviewed:
  True
• Start Date:
  19840801
• Source Full Name:
  Journal of Occupational Medicine
• End Date:
  19970331
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3c47a5ae384a7eec34aeb9d85fa3770ebbcbc8b0f8916acbabfb240d8f45989e9987c187f42dd0f0060a0abf48101a01d3a312e314a1a8862cc0877dc82ff23b
• Download URL:
  https://stacks.cdc.gov/view/cdc/185494/cdc_185494_DS1.pdf
• File Type:
  [PDF - 2.56 MB ]