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Related Concept Videos

Prevention of Further Absorption of Poison01:14

Prevention of Further Absorption of Poison

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In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
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Pharmaceutical Poisoning: Treatment Strategies01:26

Pharmaceutical Poisoning: Treatment Strategies

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Treatment strategies for poisoning are a critical aspect of emergency medicine, focusing on preventing the absorption of toxins and enhancing their elimination. When a poisoning incident occurs, the first response is to halt exposure and decontaminate the patient, particularly through gastrointestinal (GI) methods if the poison was ingested.Gastrointestinal Decontamination Techniques:Activated charcoal is the cornerstone of GI decontamination. It works through adsorption, binding the toxin to...
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Antidotes01:17

Antidotes

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Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
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Enhanced Elimination of Poison01:26

Enhanced Elimination of Poison

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Poison can be effectively removed from the gastrointestinal (GI) tract through various decontamination procedures.
Antidotes serve a crucial role in counteracting the effects of poison by inhibiting enzymes responsible for producing harmful drug metabolites. In some cases, these toxic metabolites can be neutralized by endogenous cosubstrates, which are maintained at specific concentrations to prevent interaction with cellular macromolecules and subsequent cell death.
Renal excretion is the...
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Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

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Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is...
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A Sensitive Visual Method for the Detection of Hydrogen Sulfide Producing Bacteria
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Developing effective countermeasures against acute hydrogen sulfide intoxication: challenges and limitations.

Philippe Haouzi1, Takashi Sonobe1, Annick Judenherc-Haouzi2

  • 1Division of Pulmonary and Critical Care Medicine, Department of Medicine, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania.

Annals of the New York Academy of Sciences
|March 7, 2016
PubMed
Summary

Hydrogen sulfide (H2S) poses significant risks in industrial settings and as a suicide method. This review explores challenges in H2S poisoning treatment and introduces new therapies targeting its severe cardiac and neurological effects.

Keywords:
H2Sapneahydrogen sulfidehydroxocobalaminmethemoglobinmethylene bluepulseless electrical activity

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Area of Science:

  • Toxicology
  • Environmental Health
  • Neuroscience

Background:

  • Hydrogen sulfide (H2S) is a toxic gas prevalent in the gas and farming industries.
  • H2S is also a method for suicide due to its ease of manufacture.
  • Its toxicity stems from binding metalloproteins and altering proteins, impacting vital functions.

Purpose of the Study:

  • To review the challenges in developing effective treatments for H2S intoxication.
  • To present novel pharmacological strategies for managing H2S poisoning consequences.

Main Methods:

  • Literature review of H2S toxicity mechanisms.
  • Analysis of current and emerging therapeutic approaches for H2S poisoning.

Main Results:

  • H2S rapidly causes coma, cardiac dysfunction, and death via electromechanical dissociation.
  • Long-term neurological deficits result from direct neuronal toxicity and secondary effects like apnea.
  • Current treatments face challenges in effectively trapping or neutralizing H2S.

Conclusions:

  • Effective H2S intoxication treatment remains a significant challenge.
  • Novel pharmacological approaches are needed to address the severe cardiac and neurological impacts of H2S.
  • Further research into H2S detoxification and mitigation strategies is crucial.