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Intermediate syndrome due to prolonged parathion poisoning
J De Bleecker1, D Vogelaers, C Ceuterick
1Department of Neurology, Gent University Hospital, Belgium.
Acta Neurologica Scandinavica
|October 1, 1992
Summary
A parathion poisoning case showed prolonged cholinesterase inhibition and an intermediate syndrome with respiratory and nerve weakness lasting three weeks. This highlights impaired metabolism and excretion affecting neuromuscular function.
Area of Science:
- Toxicology
- Neurology
- Clinical Medicine
Background:
- Organophosphate pesticides like parathion can cause severe poisoning.
- Cholinesterase inhibition is a key mechanism in organophosphate toxicity.
- Impaired metabolic and excretory functions can prolong toxic effects.
Observation:
- A patient presented with prolonged cholinesterase inhibition after parathion poisoning.
- An intermediate syndrome manifested as respiratory paresis and cranial/proximal muscle weakness for three weeks.
- Marked cholinesterase reduction persisted throughout the observation period.
Findings:
- Serial electromyography (EMG) with repetitive nerve stimulation indicated a mixed pre- and postsynaptic neuromuscular transmission disorder.
- Electron microscopy of muscle biopsy revealed nonspecific focal degeneration at postsynaptic folds.
Implications:
- This case illustrates a prolonged intermediate syndrome in parathion poisoning, linked to impaired metabolism and excretion.
- The findings suggest a complex neuromuscular dysfunction involving both pre- and postsynaptic elements.
- Understanding these prolonged effects is crucial for managing severe organophosphate poisoning and its neurological sequelae.