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Related Concept Videos

General Anesthesia: Overview01:24

General Anesthesia: Overview

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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...
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Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

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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.
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Stages of General Anesthesia01:22

Stages of General Anesthesia

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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...
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Inhalational Anesthetics: Overview01:20

Inhalational Anesthetics: Overview

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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...
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Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

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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...
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Local Anesthetics: Chemistry and Structure-Activity Relationship01:30

Local Anesthetics: Chemistry and Structure-Activity Relationship

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Local anesthetics (LAs) are drugs that induce a temporary loss of sensation in a limited body area, preventing pain. Cocaine was the first local anesthetic discovered in the late 19th century. Cocaine is a benzoic acid ester obtained from the leaves of coca shrubs and was often used for its psychotropic effects. Cocaine was first isolated in 1860 by Albert Niemann. Sigmund Freud studied the physiological actions of cocaine. Carl Koller later introduced it into clinical practice in 1884 as a...
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Related Experiment Video

Updated: Apr 29, 2026

Adaptation of Microelectrode Array Technology for the Study of Anesthesia-induced Neurotoxicity in the Intact Piglet Brain
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General anaesthetics and the developing brain: an overview.

B Sinner1, K Becke, K Engelhard

  • 1Department of Anaesthesiology, University of Regensburg, Regensburg, Germany.

Anaesthesia
|May 16, 2014
PubMed
Summary

General anesthetics may harm developing brains, but human studies show no clear evidence of neurocognitive deficits in children under 3-4 years old. Ongoing research aims to clarify these risks.

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Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
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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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Recording Brain Electromagnetic Activity During the Administration of the Gaseous Anesthetic Agents Xenon and Nitrous Oxide in Healthy Volunteers
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Area of Science:

  • Neuroscience
  • Anesthesiology
  • Developmental Biology

Background:

  • Animal studies suggest general anesthetics can be toxic to the developing brain.
  • Potential mechanisms include apoptosis induction and interference with neurogenesis.
  • Impact on later neurocognitive function is a concern.

Purpose of the Study:

  • To evaluate the potential neurotoxic effects of general anesthetics on the developing human brain.
  • To investigate the relationship between early-life anesthesia exposure and later neurocognitive or behavioral outcomes.

Main Methods:

  • Review of experimental animal studies.
  • Analysis of retrospective studies in human infants and children.
  • Ongoing prospective studies (PANDA, MASK, GAS) are investigating the relationship.

Main Results:

  • Currently, no clear evidence links anesthesia exposure up to age 3-4 years with neurocognitive or behavioral deficits in humans.
  • The transferability of animal study findings to humans remains controversial and under investigation.

Conclusions:

  • While animal studies raise concerns, human data thus far do not confirm significant neurocognitive risks from early anesthesia exposure.
  • Recommendations include minimizing anesthesia/surgery duration, using short-acting agents, and multimodal pain management to reduce drug dosage.