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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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Hemoglobin01:24

Hemoglobin

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Hemoglobin is a globular protein made up of four subunits. Two of these subunits are alpha chains, and the other two are beta chains. Each subunit contains a molecule of heme, which has an iron atom and can bind to oxygen. When an oxygen molecule binds to one heme group, it changes the shape of hemoglobin, making it easier for the other heme groups to bind oxygen as well.
When all four heme groups are bound to oxygen, the resulting molecule is called oxyhemoglobin. As a result, arterial blood...
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Related Experiment Video

Updated: Apr 30, 2026

A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
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A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering

Published on: December 7, 2016

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Haptoglobin testing in hemolysis: measurement and interpretation.

Andrew W Y Shih, Andrew McFarlane, Madeleine Verhovsek

    American Journal of Hematology
    |May 9, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Haptoglobin testing is crucial for identifying hemolysis, but interpretation challenges exist due to various factors. Understanding its roles and testing limitations is vital for accurate clinical application.

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    Area of Science:

    • Biochemistry
    • Clinical Chemistry
    • Hematology

    Background:

    • Haptoglobin, produced by the liver, binds free hemoglobin from lysed red blood cells, preventing toxicity.
    • Depleted haptoglobin levels serve as a key indicator of hemolysis.
    • Existing literature presents challenges in interpreting haptoglobin test results.

    Purpose of the Study:

    • To review the physiological roles of haptoglobin.
    • To discuss various testing methodologies and their limitations.
    • To provide guidance on the accurate interpretation of haptoglobin testing.

    Main Methods:

    • Literature review of physiological roles and testing methodologies.
    • Analysis of spectrophotometry, immunoreactive methods, and gel electrophoresis.
    • Evaluation of factors affecting test accuracy, including pitfalls and limitations.

    Main Results:

    • Haptoglobin has diverse physiological functions beyond hemoglobin binding.
    • Multiple testing methods exist, each with unique advantages and disadvantages.
    • Factors like specimen preparation, medical conditions (cirrhosis, inflammation), and medications can lead to false positives/negatives.

    Conclusions:

    • Accurate interpretation of haptoglobin testing requires understanding its physiological roles and potential confounding factors.
    • No single gold standard exists; validation relies on a combination of clinical and laboratory data.
    • Clinicians and lab staff must be knowledgeable to ensure correct interpretation and application of haptoglobin tests.