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Related Concept Videos

Structure and Function of Platelets01:18

Structure and Function of Platelets

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 platelets, with...
Disorders of Hemostasis01:24

Disorders of Hemostasis

Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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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Related Experiment Video

Updated: Jun 17, 2026

Microfluidics in Assessing Platelet Function
06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Platelet count less than SHARP: what does a case series reveal?

M Wasif Saif

    Expert Opinion on Drug Safety
    |December 17, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Sorafenib offers a survival benefit for advanced hepatocellular carcinoma (HCC). This study shows sorafenib is safe for HCC patients with low platelet counts, previously excluded from trials.

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    Area of Science:

    • Hepatocellular Carcinoma (HCC) Research
    • Oncology Drug Efficacy
    • Liver Disease Management

    Background:

    • Advanced hepatocellular carcinoma (HCC) lacks effective systemic treatments.
    • The SHARP study established sorafenib as a survival-prolonging therapy for HCC.
    • SHARP trial inclusion criteria excluded patients with platelet counts below 60,000/mm³.

    Observation:

    • Thrombocytopenia is a common complication in chronic liver disease patients.
    • Three HCC patients with platelet counts < 60,000/mm³ were treated with sorafenib.
    • These patients tolerated sorafenib without complications.

    Findings:

    • Sorafenib can be safely administered to HCC patients with thrombocytopenia.
    • This case series expands the known safety profile of sorafenib in HCC.
    • Successful treatment was observed in patients with low platelet counts.

    Implications:

    • Sorafenib may be a viable treatment option for advanced HCC patients with thrombocytopenia.
    • Careful monitoring and informed consent are crucial for managing bleeding risks.
    • Further research is warranted to confirm safety and efficacy in this patient subgroup.