CARBON MONOXIDE AND HUMAN VIGILANCE. A DELETERIOUS EFFECT OF PRESENT URBAN CONCENTRATIONS.

THIS STUDY WAS CONDUCTED TO DETERMINE WHETHER CARBON MONOXIDE GAS IS A FACTOR RESPONSIBLE FOR DETERIORATION OF VIGILANCE IN MEN BREATHING POLLUTED AIR. TEN SUBJECTS WERE EXPOSED FOR SLIGHTLY LONGER THAN TWO HOURS, ON SEPARATE OCCASIONS, TO CO LEVELS APPROXIMATING THE AVERAGE (26 PPM) AND PEAK (111 PPM) LEVELS FOUND WHILE DRIVING IN URBAN TRAFFIC. DURING THE LAST HOUR OF EACH EXPOSURE THE SUBJECTS UNDERTOOK A STANDARD TEST OF VISULA VIGILANCE. THEY ALSO UNDERTOOK THE TEST WHILE BREATHIG AIR WITHOUT CO. BLOOD CARBOXYHEMOGLOBIN LEVELS WERE MEASURED PRIOR TO EXPOSURE, BEFORE AND AFTER THE TESTS. HEART RATES AND MINUTE VENTILATORY VOLUMES WERE ALSO MEASURED. THE RESULTS SHOWED THAT VIGILANCE WAS IMPAIRED BY BREATHING 111 PPM CO WHICH RAISED THE EVERAGE COHB LEVEL TO 6.6 PERCENT HEART RATES AND MINUTE VENTILATORY VOLUMES WERE NOT AFFECTED. /AUTHOR/

  • Authors:
    • Horvath, S M
    • Dahms, T E
    • O'Hanlon, J F
  • Publication Date: 1971-11

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 343-7
  • Serial:
    • Volume: 23

Subject/Index Terms

Filing Info

  • Accession Number: 00240358
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jul 16 1974 12:00AM