Related Experiment Videos
Hepatic ultrasonic changes in workers exposed to perchloroethylene
C A Brodkin1, W Daniell, H Checkoway
1Department of Medicine, University of Washington, Seattle 98104, USA.
Occupational and Environmental Medicine
|October 1, 1995
Summary
Workers exposed to perchloroethylene show subclinical liver damage, with ultrasonography revealing more changes than standard blood tests. This suggests current monitoring may underestimate the risks of workplace solvent exposure.
Area of Science:
- Occupational Health
- Hepatology
- Toxicology
Background:
- Perchloroethylene (PCE) is a common solvent used in dry cleaning.
- Workplace exposure to PCE may pose risks to liver health.
- Subclinical hepatotoxicity is difficult to detect with standard monitoring.
Purpose of the Study:
- To investigate subclinical liver damage in perchloroethylene-exposed workers.
- To compare ultrasonography findings with serum transaminase levels.
- To assess if current monitoring underestimates PCE-induced liver effects.
Main Methods:
- Compared hepatic parenchymal echogenicity via ultrasonography and serum transaminase activity.
- Studied 29 dry cleaning operators exposed to PCE and 29 unexposed laundry workers.
- Assessed PCE exposure through work history and air monitoring.
Main Results:
- Dry cleaners showed minimally increased transaminase levels compared to controls.
- Ultrasonography revealed nearly twofold increased hepatic parenchymal changes in dry cleaners (67% vs 39%).
- PCE exposure was linked to liver changes, particularly in older workers during transfer operations.
Conclusions:
- Mild to moderate hepatic parenchymal changes are more common in PCE-exposed workers.
- Serum hepatic transaminase activity underestimates the effects of PCE exposure.
- Ultrasonography is a more sensitive tool for detecting subclinical liver damage from solvents.