NIOSHTIC-2 Publications Search

Technical Assistance Report No. TA-78-62, Louisiana State University, School of Dentistry, New Orleans, Louisiana.

Authors
Taft RM
Source
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, TA 78-62, 1979 Feb; :1-11
Link
NIOSHTIC No.
00114543
Abstract
Environmental and personal air samples were analyzed at the Louisiana State University School of Dentistry (SIC-8221), New Orleans, on October 2 and 3, 1978, to determine exposures to toxic concentrations of nitrous-oxide (10024972), mercury (7439976) vapor, and formaldehyde (50000). The evaluation was requested by the safety director on behalf of an unidentified number of dental students and school employees. Exposure to nitrous-oxide was studied by infrared analysis. A direct reading device evaluated mercury contamination and detector tubes evaluated formaldehyde. Nitrous-oxide environmental concentrations were less than 3.0 parts per million (ppm), but personal sample concentrations in the senior dental clinic ranged from 38 to 132ppm. The NIOSH recommended criteria for nitrous-oxide is 25ppm. The anesthesia/analgesia machine had numerous nitrous-oxide leaks. Mercury vapor concentrations in the Participation Clinic generally were less than standard of 0.1mg/Cu m. Formaldehyde concentrations generally were less than 1.0ppm, below the OSHA standard of 3.0ppm. The investigators conclude that some dental students and school employees still were being exposed to excessive concentrations of nitrous-oxide, even though a waste anesthetic gas scavenging system had been installed recently. They recommend the installation of a separate high vacuum scavenging line, regular preventive maintenance, frequent leak testing of anesthesia equipment, and an inhouse nitrous-oxide air monitoring program.
Keywords
NIOSH-Author; NIOSH-Technical-Assistance-Report; TA-78-62; Region-6; Hazards-Confirmed; Air-sampling; Health-surveys; Anesthetics; Industrial-hygiene
CAS No.
10024-97-2; 7439-97-6; 50-00-0
Publication Date
19790201
Document Type
Field Studies; Technical Assistance
Fiscal Year
1979
NTIS Accession No.
PB82-182627
NTIS Price
A03
Identifying No.
TA-78-62
NIOSH Division
DSHEFS
SIC Code
8221
Source Name
National Institute for Occupational Safety and Health
State
LA; OH
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division