What is type III paralysis due to organophosphate (OP) toxicity?

Updated: Dec 31, 2020
  • Author: Kenneth D Katz, MD, FAAEM, ABMT; Chief Editor: Sage W Wiener, MD  more...
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Type III paralysis, or organophosphate-induced delayed polyneuropathy (OPIDP) occurs 2-3 weeks after exposure to large doses of certain organophosphates and is due to inhibition of neuropathy target esterase, which is a different esterase than the one responsible for the acute effects of organophosphates. Distal muscle weakness with relative sparing of the neck muscles, cranial nerves, and proximal muscle groups characterizes OPIDP. Recovery can take up to 12 months. [11, 12]

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