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Related Experiment Videos

Solvent uptake in relation to physical activity.

K D Bergert1, K Nestler

  • 1Centre of Occupational Medicine, Niederdorf, German Democratic Republic.

The Science of the Total Environment
|January 1, 1991
PubMed
Summary

Lung ventilation and serum free fatty acids affect organic solvent internal exposure. Increased free fatty acids indicate higher exposure, highlighting worker susceptibility and medical care needs.

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Area of Science:

  • Occupational health
  • Toxicology
  • Environmental health

Background:

  • Organic solvents like styrene, toluene, and xylene are common in industrial settings.
  • Worker exposure to these solvents can lead to significant internal exposure.
  • Understanding factors influencing internal exposure is crucial for occupational safety.

Purpose of the Study:

  • To investigate the impact of lung ventilation and serum free fatty acids on internal organic solvent exposure.
  • To assess how exercise influences solvent uptake and internal exposure.
  • To identify potential biomarkers for monitoring worker exposure and susceptibility.

Main Methods:

  • 68 healthy male subjects were exposed to styrene, toluene, or xylene for 1 hour.
  • Exposure occurred both at rest and during exercise.
  • Internal exposure was measured by venous blood concentrations and urinary metabolites.
  • Serum free fatty acid levels were monitored in relation to exposure.

Main Results:

  • Solvent uptake was influenced by air concentration, retention index, and pulmonary ventilation.
  • Internal exposure correlated with increased serum free fatty acid levels.
  • Exercise appeared to affect solvent uptake and internal exposure dynamics.
  • Individual susceptibility, indicated by free fatty acid changes, was observed.

Conclusions:

  • Lung ventilation and serum free fatty acids are key factors in organic solvent internal exposure.
  • Monitoring free fatty acid levels may help assess worker susceptibility and exposure.
  • Biological exposure limits are suggested for better control of internal exposure.
  • Further research into managing free fatty acid increases in exposed workers is warranted.

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