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Reversible nerve lesions after accidental polychlorinated biphenyl exposure
Scandinavian Journal of Work, Environment & Health
|April 1, 1985
Summary
Accidental exposure to polychlorinated biphenyls (PCB) fumes caused temporary nerve damage in workers. Nerve conduction studies showed reversible impairment, indicating PCB
Area of Science:
- Occupational Health
- Neurotoxicology
- Environmental Health
Background:
- Capacitor explosions released polychlorinated biphenyls (PCB) in a cardboard plant.
- Workers experienced acute symptoms like nausea and headache following PCB exposure.
Purpose of the Study:
- To investigate the neurophysiological effects of accidental PCB exposure in occupationally exposed workers.
- To assess the reversibility of potential nerve damage following PCB fume exposure.
Main Methods:
- Neurophysiological assessment of 15 highly exposed male workers and 30 controls.
- Measurement of motor and sensory nerve conduction velocities (MCV, SCV) at 2 and 6 months post-exposure.
- Utilized skin electrodes for nerve conduction studies on median, ulnar, peroneal, and sural nerves.
Main Results:
- Exposed workers showed significantly slower sensory conduction velocities (SCV) and distal SCVs two months after exposure.
- Six months post-exposure, distal SCV of the ulnar nerve and SCV of the sural nerve remained slightly slower.
- Significant improvement in distal SCVs was observed during the follow-up period.
Conclusions:
- Accidental PCB fume exposure led to reversible distal axonopathy in exposed workers.
- The findings suggest that PCBs possess neurotoxic properties in humans.
- Nerve conduction studies are valuable for detecting and monitoring PCB-induced neurotoxicity.