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HHE Report No. HETA-86-157-1678, Stag Dental Clinic, Boulder, Colorado.

Authors
Gunter-BJ
Source
NIOSH 1986 Mar:10 pages
NIOSHTIC No.
00163146
Abstract
Employees of the Stag Dental Clinic (SIC-8021), Boulder, Colorado requested an evaluation of nitrous-oxide (10024972) exposure during dental procedures. Direct reading measurements taken in the dental operatory immediately after nitrous-oxide was administered showed levels exceeding 1000 parts per million (ppm) in the breathing zone of the dentist and his assistant. The levels remained high throughout the 1 hour procedure. The level of nitrous-oxide in the hallway outside the operatory was 300ppm and that in the adjacent operatory, 150ppm (background). General room air in the operatory in use was 800ppm nitrous-oxide. Levels of nitrous-oxide decreased to 50ppm 1.5 hour after the gas was turned off. The current NIOSH recommended time weighted average is 25ppm. The author concludes that a health hazard existed at the dental office due to high exposures of nitrous-oxide. It was recommended that a scavenging system should be installed. Recommendations also included routine maintenance on anesthetic and suction equipment, a follow-up evaluation after the exhaust systems have been in place, advising all dentists and other personnel in the clinic of the adverse health effects present due to nitrous oxide, and use of more dilution ventilation.
Keywords
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; HETA-86-157-1678; Hazard-Confirmed; Dentistry; Nitrogen-oxides; Gases; Anesthesia; Region-8; Ventilation-systems; NIOSH-Technical-Assistance-Report;
CAS No.
10024-97-2;
Publication Date
19860301
Document Type
Hazard Evaluation and Technical Assistance;
Fiscal Year
1986
NTIS Accession No.
PB86-223021
NTIS Price
A02
Identifying No.
HETA-86-157-1678
NIOSH Division
DSHEFS;
SIC Code
8021;
Source Name
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-86-157-1678, 10 pages, 14 references
State
CO; ME; OH;
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