Ergonomic applications and control of chemical aerosols.
McGlothlin-JD; Jensen-PA; Gressel-MG; Heitbrink-WA
Trends in Ergonomics/Human Factors V 1988 Jun; :333-343
A method incorporating the principles of both ergonomics and industrial hygiene through integration of real time instruments with ergonomic task analysis was applied to a plastics manufacturing factory in which chemical powders were manually transferred and weighed and to a dental operatory using nitrous-oxide (10024972) anesthesia during surgery. These two case studies were discussed in some detail, including description of process or procedure, real time sampling for dust or gas exposure, ergonomic evaluation, and statistical methods. Hand held and real time aerosol monitors were utilized to evaluate respirable dust exposure in the material transfer and weighing; infrared analysis was used for the continuous measurement of nitrous-oxide. Ergonomic evaluation made use of a video camera ensemble and traditional job analysis techniques. A model to predict worker dust exposure indicated that most of the exposure was caused by scooping the powder from the drum. Nitrous- oxide concentrations within the breathing zones of the dentist and dental assistant ranged from 25 parts per million (ppm) at the beginning of the operation to 950ppm 20 minutes into the operation. Means of controlling dust exposure during the scooping task and nitrous-oxide exposure in dental operatories were suggested. The authors conclude that systematic evaluations of the worker and work practices provide an excellent complement to environmental monitoring.
Workplace-studies; Airborne-dusts; Industrial-dusts; Nitrogen-oxides; Occupational-exposure; Anesthetics; Dentists; Industrial-factory-workers; Work-practices; Toxic-gases
Trends in Ergonomics/Human Factors V, Proceedings of the Annual International Industrial Ergonomics and Safety Conference, New Orleans, Louisiana, June 8-10, 1988