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Formation of the Platelet Plug01:22

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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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Structure and Function of Platelets01:18

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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.
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The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
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Introduction to Hemostasis01:05

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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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Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Updated: Mar 16, 2026

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Platelets and coagulation in infection.

Rachelle P Davis1, Sarah Miller-Dorey1, Craig N Jenne1

  • 1Department of Microbiology, Immunology and Infectious Diseases, Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary , Calgary, Alberta, Canada.

Clinical & Translational Immunology
|August 16, 2016
PubMed
Summary

Disseminated intravascular coagulation (DIC) in sepsis worsens patient outcomes. New therapies targeting inflammation, platelets, and neutrophil extracellular traps (NETs) are needed to improve treatment for this complex condition.

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Area of Science:

  • Critical care medicine
  • Hematology
  • Immunology

Background:

  • Disseminated intravascular coagulation (DIC) is a severe complication of sepsis, significantly increasing patient mortality and morbidity.
  • DIC involves uncontrolled blood clot formation and consumption of clotting factors, leading to both thrombosis and hemorrhage.
  • Current anticoagulant therapies for sepsis-associated DIC show limited efficacy, partly due to the immune system's role in initiating coagulation.

Purpose of the Study:

  • To review current anticoagulant treatments for sepsis-associated DIC.
  • To explore the role of inflammation, platelets, and neutrophil extracellular traps (NETs) in sepsis-induced coagulation.
  • To discuss the development of future therapeutic strategies targeting these key mediators.

Main Methods:

  • Literature review of current research on sepsis-associated DIC.
  • Analysis of studies investigating the interplay between inflammation and coagulation.
  • Examination of the role of platelets and NETs in infection-related coagulation.

Main Results:

  • Sepsis-induced coagulation is complex, involving systemic inflammation.
  • Platelets and NETs are identified as critical mediators in infection-driven coagulation processes.
  • Existing anticoagulants have mixed outcomes, highlighting the need for novel approaches.

Conclusions:

  • Effective treatment of sepsis-associated DIC requires addressing the interaction between inflammation and coagulation.
  • Targeting platelet and NET-mediated coagulation pathways holds promise for future therapeutic development.
  • Further research into novel anticoagulants that modulate immune responses is warranted.