Experience with hemoperfusion for organophosphate poisoning

Area of Science:

• Toxicology
• Emergency Medicine
• Pharmacology

Background:

• Organophosphate poisoning poses a significant clinical challenge.
• Effective treatment strategies are crucial for improving patient outcomes.
• Extracorporporeal clearance techniques are sometimes considered for poisonings.

Purpose of the Study:

• To evaluate the clinical utility of extracorporeal clearance techniques, specifically hemoperfusion, in managing organophosphate poisoning.
• To assess the efficacy of hemoperfusion in removing organophosphate toxins from the body.

Main Methods:

• A retrospective study was conducted in an intensive care unit.
• Ten patients with organophosphate poisoning received standard treatment plus hemoperfusion.
• Plasma insecticide levels, cholinesterase activity, and fat tissue concentrations were monitored.

Main Results:

• Hemoperfusion removed less than 0.1% of the total absorbed organophosphate poison.
• No significant changes in patient symptoms were observed following hemoperfusion.
• Fat tissue concentrations of the insecticide were substantially higher than plasma concentrations, indicating significant sequestration.

Conclusions:

• Extracorporeal clearance is clinically insignificant for organophosphate poisoning due to the high lipophilicity of these agents.
• Atropine administration can decrease intestinal transit, potentially prolonging toxin absorption.
• Prompt and aggressive use of cathartics may be a more effective strategy to prevent sustained absorption from gastrointestinal reservoirs.