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Related Experiment Videos

Effects of hydrogen sulfide on neurobehavioral function.

Kaye H Kilburn1

  • 1Environmental Sciences Laboratory, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA. kilburn@usc.edu

Southern Medical Journal
|August 28, 2003
PubMed
Summary

Hydrogen sulfide (H2S) exposure caused significant cognitive and physiological impairments in workers and bystanders. These H2S-related deficits were comparable across different exposure scenarios, highlighting the persistent neurotoxic effects of H2S.

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Area of Science:

  • Toxicology
  • Neuroscience
  • Environmental Health

Background:

  • Compares 19 recent hydrogen sulfide (H2S)-exposed patients with 202 unexposed individuals.
  • Analyzes a 1997-2001 case-referent series against 16 prior case-referent patients from 1991-1996.

Purpose of the Study:

  • To compare the physiological and psychological effects of H2S exposure in different patient groups.
  • To assess neurotoxic effects of H2S in workers versus bystanders.

Main Methods:

  • Evaluated 8 physiological and 12 psychological measurements in three groups: recent H2S bystanders, prior H2S workers, and unexposed controls.
  • Compared observed measurements against predicted values, adjusting for age, sex, and education.

Main Results:

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  • H2S-exposed patients demonstrated poor performance in balance, reaction time, and cognitive functions compared to controls.
  • Impairments in visual and auditory performance, memory, and executive function were noted.
  • Neurobehavioral deficits were similar between recent bystanders and prior workers, irrespective of consciousness during exposure.

Conclusions:

  • Hydrogen sulfide (H2S) exposure leads to comparable neurotoxic impairments in both conscious bystanders and previously unconscious workers.
  • Findings indicate persistent cognitive and physiological deficits following H2S exposure.