- Toxicology
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Methidathion Poisoning
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Ki Hoon Kim, Se Hun Kim, Charles Her
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Korean J Crit Care Med. 2017;32(4):363-369. Published online January 17, 2017
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DOI: https://doi.org/10.4266/kjccm.2016.00073
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- Although methidathion is an organophosphate insecticide, it is different from the other organophosphates in terms of toxicity. Because of its relatively high fat solubility, the apparent volume of methidathion distribution throughout the body is very high, indicating that hemoperfusion is not effective in removing this organophosphate from the body. Redistribution of methidathion from fat to blood can also occur when plasma levels diminish. Additionally, acetylcholinesterase aging, which is the loss of an alkyl side chain that prevents reactivation by oximes, is very rapid so that the effective reactivation by oximes is thwarted. Thus, methidathion’s effect on acetylcholinesterase inhibition is long lasting, particularly with a high dose. In addition to its parasympatholytic effect and ability to induce muscle paralysis, methidathion poisoning is associated with a profound and long-lasting circulatory collapse due to sympathetic ganglion blockade. This report presents the case of a 55-year-old man who accidentally ingested a high dose of methidathion. He later developed enteroinvasive aspergillosis infection-induced multiple bowel perforations on two separate occasions while on mechanical ventilator support, resulting in a fatal outcome. The renin-angiotensin axis activated by sympathetic ganglion blockade may have reduced the patient’s splanchnic blood flow, contributing to translocation of endotoxin. Also, the effect of excessive acetylcholine on non-neuronal acetylcholine receptors may have contributed to the development of fatal enteroinvasive aspergillosis in this patient.
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Citations
Citations to this article as recorded by  - A case report of acute kidney injury following organophosphate methidathion poisoning
Bilel Chefirat, Anissa Zergui, Haciba Rezk-Kallah
Toxicologie Analytique et Clinique.2022; 34(2): 121. CrossRef
- Cardiology
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Venous Air Embolism Not Amniotic Fluid Embolism
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Charles Her
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Korean J Crit Care Med. 2016;31(1):68-70. Published online February 29, 2016
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DOI: https://doi.org/10.4266/kjccm.2016.31.1.68
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- Pulmonary
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Central Venous Catheter-Related Hydrothorax
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Se Hun Kim, Charles Her
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Korean J Crit Care Med. 2015;30(4):343-348. Published online November 30, 2015
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DOI: https://doi.org/10.4266/kjccm.2015.30.4.343
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Abstract
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- This report describes a case of 88-year-old women who developed central venous catheter-related bilateral hydrothorax, in which left pleural effusion, while right pleural effusion was being drained. The drainage prevented accumulation of fluid in the right pleural space, indicating that there was neither extravasation of infusion fluid nor connection between the two pleural cavities. The only explanation for bilateral hydrothorax in this case is lymphatic connections. Although vascular injuries by central venous catheter can cause catheter-related hydrothorax, it is most likely that the positioning of the tip of central venous catheter within the lymphatic duct opening in the right sub-clavian-jugular confluence or superior vena cava causes the catheter-related hydrothorax. Pericardial effusion can also result from retrograde lymphatic flow through the pulmonary lymphatic chains.
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