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Related Concept Videos

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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General Anesthesia: Overview01:24

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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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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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Amnesia01:13

Amnesia

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Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
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Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

470
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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Related Experiment Video

Updated: Dec 11, 2025

Assessing Changes in Synaptic Plasticity Using an Awake Closed-Head Injury Model of Mild Traumatic Brain Injury
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Anesthesia and the brain after concussion.

Jeffrey J Pasternak1, Arnoley S Abcejo

  • 1Department of Anesthesiology and Perioperative Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.

Current Opinion in Anaesthesiology
|August 16, 2020
PubMed
Summary
This summary is machine-generated.

Concussion can alter brain blood flow, even after symptoms resolve. Repeated concussions may lead to chronic traumatic encephalopathy, increasing vulnerability to anesthesia-related injury.

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A Neuroscientific Approach to the Examination of Concussions in Student-Athletes
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Area of Science:

  • Neuroscience
  • Sports Medicine
  • Anesthesiology

Background:

  • Concussion, a traumatic brain injury, presents acute and chronic challenges.
  • Understanding its effects on cerebral hemodynamics is crucial.

Purpose of the Study:

  • To review the epidemiology, pathophysiology, and anesthetic considerations of acute and chronic repeated concussion.
  • To offer broad care recommendations for concussion management.

Main Methods:

  • Literature review of studies on concussion, cerebral hemodynamics, and anesthesia.
  • Synthesis of findings on acute and chronic concussion impacts.

Main Results:

  • Acute concussion alters cerebral hemodynamics, with potential for persistent changes.
  • Repeated concussions are linked to chronic traumatic encephalopathy (CTE), resembling dementia.
  • Anesthetic use post-concussion carries risks due to potential secondary injury vulnerability.

Conclusions:

  • Brain physiology may remain abnormal post-concussion, despite symptom resolution.
  • Patients with recent or repeated concussions are susceptible to perioperative injury.
  • Clinicians must consider concussion in trauma patients and maintain cerebral homeostasis during anesthesia.