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Related Concept Videos

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...
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.
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Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

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Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
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.

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Related Experiment Video

Updated: May 9, 2026

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
05:49

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets

Published on: November 29, 2024

A platelet cover-up.

Donald M Arnold1

  • 1McMaster University

Blood
|July 23, 2013
PubMed
Summary
This summary is machine-generated.

This study presents a new in utero treatment for neonatal alloimmune thrombocytopenia (NAIT). Researchers explored shielding fetal platelets from maternal antibodies to prevent NAIT complications.

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Last Updated: May 9, 2026

Procoagulant Platelet Characterization by Measuring Phosphatidylserine Exposure and Microvesicle Release from Human Purified Platelets
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Area of Science:

  • Hematology
  • Immunology
  • Perinatology

Background:

  • Neonatal alloimmune thrombocytopenia (NAIT) is a serious condition caused by maternal antibodies attacking fetal platelets.
  • Current treatments for NAIT often involve interventions after birth, which may not be sufficient for severe cases.

Purpose of the Study:

  • To investigate a novel in utero therapeutic strategy for NAIT.
  • To evaluate the feasibility of shielding fetal platelets from maternal alloantibodies during gestation.

Main Methods:

  • The study by Bakchoul et al. explored methods for protecting fetal platelets within the maternal environment.
  • This involved investigating mechanisms to prevent antibody-mediated destruction of fetal platelets.

Main Results:

  • The research identified a potential approach to mitigate NAIT by protecting fetal platelets.
  • This strategy aims to prevent the clinical manifestations of NAIT before birth.

Conclusions:

  • Shielding fetal platelets from maternal alloantibodies offers a promising novel therapeutic avenue for NAIT.
  • This in utero approach could significantly improve outcomes for infants affected by NAIT.