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Solvent exposure and cognitive function in automotive technicians.

Michael N Bates¹, Bruce R Reed², Sa Liu¹

¹Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, CA 94720, USA.

Neurotoxicology

|August 23, 2016

Summary

This summary is machine-generated.

This study found no evidence of persistent cognitive deficits in automotive technicians exposed to solvents like n-hexane. Occupational solvent exposures did not appear to pose a neurotoxic hazard to these workers.

Keywords:

Automotive repair Automotive technician Cognitive function Hexane Occupational exposure Solvent

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Area of Science:

Occupational Health
Neurotoxicology
Environmental Medicine

Background:

Automotive technicians frequently encounter organic and chlorinated solvents in cleaning products.
Previous research links occupational solvent exposure to cognitive deficits, but automotive technicians were unstudied.
Concerns exist regarding potential persistent neurotoxic hazards from solvent and n-hexane exposure in this group.

Purpose of the Study:

To investigate persistent neurotoxic hazards from n-hexane and general solvent exposure in automotive repair workers.
To assess the association between occupational solvent exposure and cognitive function in this specific workforce.
To determine if past exposure to n-hexane poses a lasting risk to automotive technicians.

Main Methods:

A cohort of 830 automotive repair workers in the San Francisco Bay Area was recruited.
Participants completed a comprehensive battery of cognitive function tests.
Cognitive test results were analyzed against estimated n-hexane and total solvent exposures.

Main Results:

Little evidence of association was found between cognitive function and estimated n-hexane or total solvent exposures.
Observed solvent and n-hexane exposures were below established occupational exposure limits.
Results suggest reassurance regarding persistent neuropsychological effects from past solvent use in this cohort.

Conclusions:

The study provides some reassurance against persistent neuropsychological effects in automotive workers from solvent and n-hexane exposure.
Low exposure levels or improved cognitive function post-n-hexane discontinuation may explain the lack of observed effects.
Peripheral neuropathy from n-hexane is a known effect not excluded by these findings; further investigation may be warranted.