PMCCPMCCPMCC

Search tips
Search criteria 

Advanced

 
Logo of anesthprogLink to Publisher's site
 
Anesth Prog. 1986 Sep-Oct; 33(5): 235–242.
PMCID: PMC2177485
Control of Nitrous Oxide Exposure in Dental Operatories Using Local Exhaust Ventilation
David E. Jacobs and Paul J. Middendorf
Abstract
An experimental portable local exhaust ventilation system was installed in three dental operatories where nitrous oxide was used routinely. Standard methods of exhaust ventilation design used in industry to control exposures to toxic airborne substances were applied to the dental operatory setting. The concentration of nitrous oxide in the dentists' breathing zones was measured before and after installation to determine the efficiency of the system in reducing occupational exposures. Results indicate that placement of the exhaust opening and exhaust air flow rate are important in determining the degree of control achieved. After the system had been installed in one operatory, peak exposures declined from over 600 parts per million (ppm) to less than 70 ppm: the time-weighted average exposure was below the NIOSH recommended level of 25 ppm. A permanently installed local exhaust ventilation system modeled after the portable one used in this pilot study may be feasible for most operatories and should not interfere with dental procedures. The results suggest that nitrous oxide exposures can be greatly reduced if dental operatories are equipped with local exhaust ventilation.
Full text
Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (1.6M), or click on a page image below to browse page by page.
Images in this article
Click on the image to see a larger version.
Articles from Anesthesia Progress are provided here courtesy of
American Dental Society of Anesthesiology