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相关概念视频

Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

114
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.
114
Stages of General Anesthesia01:22

Stages of General Anesthesia

410
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...
410
General Anesthesia: Overview01:24

General Anesthesia: Overview

206
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...
206
Local Anesthetics: Adverse Effects01:12

Local Anesthetics: Adverse Effects

404
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...
404
Local Anesthetics: Pharmacokinetics01:13

Local Anesthetics: Pharmacokinetics

754
The potency and duration of action of local anesthetics (LAs) are determined by their pharmacokinetics. Pharmacokinetics describes how LAs are absorbed, distributed, metabolized, and eliminated from the body. When administered to the vascular tissues, LAs are quickly absorbed and enter the systemic circulation, reducing their localized effects. Adding vasoconstrictors such as epinephrine to LAs reduces their absorption into the systemic circulation, making them clinically effective. The...
754

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相关实验视频

Updated: Jun 21, 2025

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics
08:16

Optogenetic Activation of Afferent Pathways in Brain Slices and Modulation of Responses by Volatile Anesthetics

Published on: July 23, 2020

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普罗波 (propofol) 麻醉使神经皮层内的神经动力学不稳定.

Adam J Eisen1, Leo Kozachkov2, André M Bastos3

  • 1The Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; The K. Lisa Yang Integrative Computational Neuroscience Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Neuron
|July 16, 2024
PubMed
概括
此摘要是机器生成的。

总麻醉会破坏大脑的动态稳定性,使神经活动在失去意识时更加不稳定. 这一发现表明,麻醉会干扰大脑.

关键词:
库普曼公司的运营商.麻醉是一种麻醉.意识 意识 意识 意识 意识动态稳定性 动态稳定性动态系统是动态系统.神经动力学 神经动力学非人类灵长类动物.普罗波福尔 (Propofol) 是一种经常性的神经网络.稳定的稳定性 稳定的稳定性

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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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Real-Time fMRI Brain Mapping in Animals
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Real-Time fMRI Brain Mapping in Animals

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相关实验视频

Last Updated: Jun 21, 2025

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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Real-Time fMRI Brain Mapping in Animals
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科学领域:

  • 神经科学是一个神经科学.
  • 复杂系统分析 复杂系统分析

背景情况:

  • 全身麻醉每天影响着数十万人的生活.
  • 一个关键假设表明,麻醉会破坏大脑的动态稳定性,这对意识至关重要.

研究的目的:

  • 为了测试麻醉会破坏动态稳定的假设.
  • 开发和应用一种用于量化麻醉期间动态稳定性变化的方法.

主要方法:

  • 开发了用于稳定性估计的延迟线性分析 (DeLASE).
  • 在醇诱导麻醉期间,对皮层局部场潜力 (LFPs) 施加DeLASE.
  • 使用模拟的神经网络来模拟麻醉效应.

主要成果:

  • 与清醒状态相比,在麻醉引起的无意识期间,神经动力学显著更不稳定.
  • 皮质活动轨迹与不稳定的线性系统的预测保持一致.
  • 模拟网络显示不稳定与增加的抑制声调,反映实验发现.

结论:

  • 麻醉破坏了维护意识所必需的动态稳定.
  • DeLASE提供了一种评估大脑状态稳定的新方法.
  • 这些发现提供了关于麻醉引起的无意识背后的神经机制的见解.