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Related Concept Videos

General Anesthesia: Overview01:24

General Anesthesia: Overview

1.1K
Anesthesia is a medical procedure that uses drugs for CNS suppression to enable painless surgeries and procedures. The selection of anesthetics is influenced by their pharmacokinetic properties, side effects, and patient characteristics. Various types of anesthesia include general, local, regional, spinal, and inhalational.
General anesthesia induces unconsciousness in the whole body, while the others target specific areas or sensations. It is administered to minimize adverse effects, maintain...
1.1K
Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

1.0K
Intravenous anesthetics are drugs administered parenterally to induce anesthesia or sedation. Propofol is a widely used agent formulated as a 1% emulsion in soybean oil, glycerol, and egg phosphatide. It induces rapid anesthesia primarily due to its rapid distribution from the bloodstream to target tissues and is metabolized in the liver. However, it can cause significant pain on injection and hypertriglyceridemia. Fospropofol, a water-based prodrug of propofol, lacks these adverse effects.
1.0K
Local Anesthetics: Mechanism of Action01:23

Local Anesthetics: Mechanism of Action

4.4K
Local anesthetics (LAs) block sensory and motor impulses by inhibiting the sodium channels on the nerve cell membranes. This induces temporary loss of sensation, relieving pain in a specific body area.
Local anesthetics are amphiphilic molecules consisting of a hydrophobic aromatic part linked to a hydrophilic group by an ester or amide linkage. They are weak bases and are usually available as salts, which increases their solubility and stability. Once administered, LAs exist in the body either...
4.4K
Inhalational Anesthetics: Overview01:20

Inhalational Anesthetics: Overview

1.7K
Inhalation anesthetics are drugs that induce general anesthesia upon inhalation. They work by increasing the sensitivity of GABAA receptors or inhibiting NMDA receptors, leading to a decrease in central nervous system activity. The depth of anesthesia can be rapidly adjusted by changing the concentration of the inhaled gas. Some common examples of inhalational anesthetics include volatile liquids like isoflurane, desflurane, sevoflurane and gases like xenon and nitrous oxide. Isoflurane, a...
1.7K
Stages of General Anesthesia01:22

Stages of General Anesthesia

2.6K
Various sedation levels offer significant advantages in facilitating procedural interventions for patients undergoing medical or invasive surgical procedures. These levels span from anxiolysis to general anesthesia, providing a spectrum of sedative effects to cater to specific patient needs. Anxiolysis reduces anxiety and is achieved through minimal sedation, enabling patients to remain awake and responsive while feeling more at ease during the procedure. This level can benefit minor...
2.6K
Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

1.0K
While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
Once absorbed into the systemic circulation, local anesthetics can affect the organs that depend on the functioning of sodium...
1.0K

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Related Experiment Video

Updated: May 1, 2026

Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers

Published on: January 13, 2018

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General anesthesia mediated by effects on ion channels.

Cheng Zhou1, Jin Liu1, Xiang-Dong Chen1

  • 1Cheng Zhou, Jin Liu, Xiang-Dong Chen, Department of Anesthesiology, Laboratory of Anesthesia and Critical Care Medicine, Translational Neuroscience Center, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.

World Journal of Critical Care Medicine
|April 5, 2014
PubMed
Summary

General anesthetics

Keywords:
General anesthesiaGlutamatergic ion channelsHyperpolarization activated cyclic nucleotideIon channelsPotassium channelsSodium channelsγ-amino-butyric acid type A receptors

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Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention

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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
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Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
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Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
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Area of Science:

  • Anesthesiology and Neuroscience

Background:

  • General anesthesia mechanisms remain poorly understood despite clinical use for over 165 years.
  • Diverse anesthetic agents (e.g., diethyl ether, propofol, ketamine) complicate understanding of anesthesia induction.
  • Identifying common molecular targets is crucial for elucidating anesthesia mechanisms.

Purpose of the Study:

  • To review current knowledge on general anesthetic effects on various ion channels.
  • To highlight ion channels as key molecular targets for general anesthesia.

Main Methods:

  • Review of existing literature on anesthetic mechanisms and ion channel interactions.
  • Focus on specific ion channel families implicated in general anesthesia.

Main Results:

  • Ion channels are primary molecular targets for general anesthetics.
  • Key channels include GABA-A, potassium, sodium, and NMDA receptors.
  • Other channels like hyperpolarization-activated, cyclic nucleotide-gated channels are also involved.

Conclusions:

  • General anesthesia likely involves multiple ion channel targets.
  • Further research into anesthetic-ion channel interactions is essential for understanding consciousness.
  • Ion channels represent promising targets for future anesthetic development.