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Health hazard evaluation report: HETA-81-200-999, Conifer Dental Group, Conifer, Colorado.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 81-200-999, 1981 Nov; :1-9
Breathing zone air samples were analyzed for nitrous-oxide (10024972) and mercury (7439976) at the Conifer Dental Group (SIC- 8021) in Conifer, Colorado, on September 21 and 25, 1981. The facility dentist requested the evaluation for an unspecified number of workers and patients. Nitrous-oxide concentrations ranged from 100 to greater than 1000 parts per million (ppm). The NIOSH recommended standard for the time weighted average concentration during anesthetic administration is 25ppm. Direct reading mercury air samples revealed mercury concentrations to be below the OSHA standard of 0.1 milligrams per cubic meter. Mercury was not detected in the breathing zone of the dentist or his assistant, or inside the amalgamation area. The authors conclude that a health hazard from nitrous-oxide existed at this facility. They recommend the installation of a scavenging system, routine maintenance on all anesthetic and suction equipment, environmental monitoring, worker education, and fresh air ventilation.
NIOSH-Author; HETA-81-200-999; NIOSH-Health-Hazard-Evaluation; Hazards-Confirmed; Region-8; Anesthetics; Air-sampling; Health-surveys; NIOSH-Technical-Assistance-Report; Author Keywords: Offices of Dentists; nitrous oxide; dental operatories; waste anesthetic gas; mercury
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: November 6, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division