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HETA Report No. TA-79-59, Dr. Thomas H. Hughes, D.M.D., Hillsboro, Ohio.
Patnode R; Pryor P
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, TA 79-59, 1980 Jun; :1-10
Area and personal air samples were taken on November 14 and 15, 1979 at the offices (SIC-8021) of a dentist in Hillsboro, Ohio to determine possible adverse health effects from exposure to nitrous- oxide (10024972) and mercury (7439976). Personal breathing zone samples were taken on two dentists and two dental assistants. Operating room personnel were exposed to nitrous-oxide concentrations that ranged from 115 to approximately 2,600 parts per million (ppm) per administration, with 75 percent of the samples falling within the 100 to 500ppm range. Area nitrous-oxide samples for the receptionist ranged from 54 to 198ppm. Personnel were exposed to a maximum of 0.036 milligrams per cubic meter (mg/m3) mercury vapor. The authors conclude that personnel are over exposed to nitrous-oxide based on the current NIOSH recommended standard of 50ppm per administration and that exposure to mercury vapor is below the NIOSH recommended standard of 0.05mg/m3. They recommend that a scavenging system be installed to exhaust the nitrous-oxide gas and reduce personnel exposure.
NIOSH-Author; NIOSH-Technical-Assistance-Report; TA-79-59; Region-5; Hazard-Confirmed; Dentistry; Work-environment; Air-contaminants; Medical-personnel; Ventilation; Technical-personnel; Air-sampling; Surgery; Anesthetics
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National Institute for Occupational Safety and Health
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