HHE Report No. HETA-84-204-1600, Dental Health Associates, Paoli, Pennsylvania.
NIOSH 1985 Jun:12 pages
Area air and breathing zone samples were analyzed for nitrous-oxide (10024972) at Dental Health Associates (SIC-8021), Paoli, Pennsylvania on August 2, 1984. The evaluation was requested by a dental assistant because of general concern about the extent of nitrous-oxide exposure, especially since the office was not equipped with a waste anesthetic gas scavenging system. Breathing zone nitrous-oxide concentrations of two dentists averaged 2,270 and 1,270 parts per million (ppm) during procedures lasting 20 and 11 minutes, respectively. The attending dental assistant received exposures of 670ppm during each procedure. The NIOSH recommended standard for nitrous-oxide is 50ppm. Area air exposures ranged from 30 to 160ppm. Prior to any nitrous-oxide use, a 22ppm background concentration was measured. The author concludes that the high nitrous-oxide exposures constitute a health hazard at the facility. The author recommends installing a waste anesthetic gas scavenging system with a dedicated exhaust. The nitrous-oxide delivery and mixing system should be checked for leaks monthly and work practices for handling nitrous-oxide should be improved.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-84-204-1600; Hazards-Confirmed; Region-3; Dentistry; Breathing; Respirators; Inhalants; Breathing-atmospheres;
Hazard Evaluation and Technical Assistance;
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, Centers for Disease Control, Public Health Service, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-84-204-1600, 12 pages, 14 references