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Related Concept Videos

Drug Distribution: Volume of Distribution01:25

Drug Distribution: Volume of Distribution

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The volume of distribution refers to the theoretical volume necessary to contain the entire amount of an administered drug at the same concentration observed in the blood plasma. The body's intracellular fluid compartment, which makes up two-thirds of the total body water, is contrasted with the extracellular fluid compartment—comprising plasma and interstitial fluid—that accounts for one-third. The volume of distribution can vary depending on the characteristics of the drug.
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Structure and Function of Platelets01:18

Structure and Function of Platelets

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The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...
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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
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F Distribution01:19

F Distribution

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The F distribution was named after Sir Ronald Fisher, an English statistician. The F statistic is a ratio (a fraction) with two sets of degrees of freedom; one for the numerator and one for the denominator. The F distribution is derived from the Student's t distribution. The values of the F distribution are squares of the corresponding values of the t distribution. One-Way ANOVA expands the t test for comparing more than two groups. The scope of that derivation is beyond the level of this...
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Distributed Loads01:19

Distributed Loads

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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
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Volume of Distribution01:20

Volume of Distribution

1.3K
The apparent volume of distribution (Vd) is a crucial pharmacokinetic parameter representing the hypothetical body fluid volume into which a drug disperses. It is calculated based on the total amount of drug in the body (estimated from the administered dose and bioavailability) divided by the plasma drug concentration. The total amount of drug in the body does not directly refer to the dose given but is derived by accounting for absorption, distribution, metabolism, and excretion processes.
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Related Experiment Video

Updated: Feb 11, 2026

A "Patient-Like" Orthotopic Syngeneic Mouse Model of Hepatocellular Carcinoma Metastasis
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Platelet Distribution Width in Hepatocellular Carcinoma.

Fenfen Guo1, Xuan Zhu1, Xue Qin1

  • 1Department of Clinical Laboratory, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China (mainland).

Medical Science Monitor : International Medical Journal of Experimental and Clinical Research
|April 25, 2018
PubMed
Summary
This summary is machine-generated.

Platelet distribution width (PDW) is elevated in hepatocellular carcinoma (HCC) patients and correlates with cancer progression. This finding suggests PDW may serve as a potential biomarker for HCC advancement.

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Area of Science:

  • Oncology
  • Hematology

Background:

  • Platelets and their activation play key roles in tumor growth, metastasis, and angiogenesis.
  • The relationship between platelet distribution width (PDW) and hepatocellular carcinoma (HCC) requires further investigation.

Purpose of the Study:

  • To analyze the correlation between platelet distribution width (PDW) and hepatocellular carcinoma (HCC).

Main Methods:

  • Retrospective analysis of HCC patients and a healthy control group.
  • Comparison of laboratory parameters using the Mann-Whitney U test.
  • Analysis of PDW differences across HCC stages via one-way ANOVA.
  • Spearman correlation analysis to assess PDW relationships with other parameters.

Main Results:

  • HCC patients exhibited higher PDW, mean platelet volume (MPV), and neutrophil-to-lymphocyte ratio (NLR) compared to controls.
  • HCC patients showed lower platelet count (P), absolute lymphocyte count (L), absolute neutrophil count (N), and platelet-to-lymphocyte ratio (PLR).
  • PDW positively correlated with HCC stage, alpha fetoprotein (AFP), and MPV; it negatively correlated with PLR and P.
  • The platelet distribution width-to-platelet count ratio demonstrated an area under the curve of 0.727.

Conclusions:

  • Platelet distribution width (PDW) is significantly associated with hepatocellular carcinoma (HCC).
  • PDW may serve as a potential predictive marker for HCC progression.