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Related Concept Videos

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

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

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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: Active Drug, Metabolite and Fraction of Metabolized Drug01:14

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In pharmacotherapy, monitoring drug concentrations is paramount, especially for drugs whose therapeutic effects hinge on both the active compound and its metabolite. Hepatic impairment profoundly influences drug potency by altering liver function. If the drug is more potent than its metabolite, impaired liver function amplifies drug activity due to elevated drug concentration levels. Conversely, if the metabolite holds greater potency, diminished liver function diminishes drug activity by...
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Hepatic Drug Excretion: Influencing Factors01:16

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The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
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Liver Physiology01:30

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The liver, an essential organ in the human body, performs over 200 vital functions that can be broadly categorized into metabolic, hematological, endocrine regulation, and bile production.
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Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment01:08

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Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
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Influence of diet intake on liver function test.

S Q Cheng1, J F Zhang1, Z F Zhang1

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Dietary intake does not significantly alter liver function tests. These tests, including serum bilirubin and liver enzymes, can be reliably performed in a fed state, offering flexibility in patient scheduling.

Keywords:
Dietary fatsDietary proteinsLiver function tests

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Area of Science:

  • Clinical Biochemistry
  • Hepatology
  • Diagnostic Medicine

Background:

  • Liver function tests (LFTs) are crucial for diagnosing and monitoring liver diseases.
  • The timing of LFTs relative to food intake is a common consideration in clinical practice.
  • Previous studies have yielded mixed results regarding the impact of postprandial states on LFTs.

Purpose of the Study:

  • To investigate the influence of dietary intake on various liver function test parameters.
  • To determine if LFTs can be reliably conducted in a fed state.

Main Methods:

  • A comparative study involving 100 patients with liver disease and 100 healthy controls.
  • Blood samples were collected in both fasting and fed (2 hours post-meal) states.
  • Standard biochemical analyzer (Hitachi-7150) used to measure serum bilirubin, thymol turbidity test, ALT, AST, ALP, LDH, GGT, SP, A, and G.

Main Results:

  • No statistically significant differences were observed in any of the measured liver function indexes between fasting and fed states (P = 0.476–0.978).
  • This indicates that postprandial changes do not substantially affect the results of these common LFTs.

Conclusions:

  • Liver function tests can be performed reliably after a meal.
  • This finding provides evidence to support flexible scheduling for LFTs, potentially improving patient convenience and compliance.