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Related Concept Videos

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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Stages of General Anesthesia01:22

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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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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow

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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

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In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
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Sedatives and Hypnotics Drugs: Barbiturates01:20

Sedatives and Hypnotics Drugs: Barbiturates

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Sedatives and hypnotics encompass a drug class that acts on the central nervous system (CNS) to alleviate anxiety, promote relaxation and induce sleep.These drugs function by amplifying the actions of the neurotransmitter γ-aminobutyric acid (GABA), resulting in reduced neuronal activity. Barbiturates, a subset of sedatives and hypnotics first synthesized in the late 1800s, are categorized into ultra-short, short, intermediate, and long-acting groups based on their duration of effect. A...
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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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Related Experiment Video

Updated: Oct 18, 2025

Application of Dixon's Up-and-Down Design to Estimate the Minimum Alveolar Concentration of Sevoflurane in Rats with Refined Movement Classification
03:02

Application of Dixon's Up-and-Down Design to Estimate the Minimum Alveolar Concentration of Sevoflurane in Rats with Refined Movement Classification

Published on: July 25, 2025

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Profound decrease of liver maximum function capacity test of isoflurane sedated patients: A report of three cases.

Elke Schwier1, Carmen Kirchner2, Claas Eickmeyer1

  • 1Department of Anesthesiology Surgical Intensive Care, Emergency and Pain Medicine Ruhr University Bochum Klinikum Herford Herford Germany.

Clinical Case Reports
|October 1, 2021
PubMed
Summary
This summary is machine-generated.

Results from the LiMAx 13C-methacetin breath test require careful consideration in patients receiving isoflurane sedation. This is crucial for accurate liver function assessment in clinical settings.

Keywords:
AnaConDaCYP1A2LiMAxisoflurane

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Area of Science:

  • Hepatology
  • Anesthesiology
  • Diagnostic Medicine

Background:

  • The LiMAx 13C-methacetin breath test is a valuable tool for assessing liver function.
  • Isoflurane is a commonly used volatile anesthetic agent.

Observation:

  • This study investigated the impact of isoflurane sedation on LiMAx test outcomes.
  • A potential interaction between isoflurane and methacetin metabolism was explored.

Findings:

  • LiMAx 13C-methacetin breath test results may be altered in patients sedated with isoflurane.
  • Interpretation of these results necessitates caution to avoid misdiagnosis of liver function.

Implications:

  • Anesthesiologists and hepatologists should be aware of this potential confounding factor.
  • Further research may be needed to elucidate the precise mechanism of interaction and establish revised interpretation guidelines.