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Related Concept Videos

Coagulation01:09

Coagulation

11.5K
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.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
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Introduction to Hemostasis01:05

Introduction to Hemostasis

15.7K
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.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

14.5K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
14.5K
Disorders of Hemostasis01:24

Disorders of Hemostasis

2.6K
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.
2.6K
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

2.2K
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...
2.2K
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

10.3K
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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Response to the comment by Gando on the updated definition and scoring of disseminated intravascular coagulation.

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Laboratory and Medicine 2.1: Care for What You Wish for.

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Updated definition and scoring of disseminated intravascular coagulation in 2025: communication from the ISTH SSC Subcommittee on Disseminated Intravascular Coagulation.

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Organ Dysfunction in Sepsis-associated Intravascular Coagulation.

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Four years into the pandemic, managing COVID-19 patients with acute coagulopathy: what have we learned?

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The role of thromboinflammation in acute kidney injury among patients with septic coagulopathy.

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Apoptotic versus procoagulant platelets: similar "necrotic" phenotype and procoagulant activity in vitro, but distinct adhesive protein composition.

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Related Experiment Video

Updated: Mar 11, 2026

Cecal Ligation Puncture Procedure
11:53

Cecal Ligation Puncture Procedure

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Coagulation and sepsis.

Marcel Levi1, Tom van der Poll2

  • 1Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; University College London Hospitals, London, United Kingdom.

Thrombosis Research
|November 26, 2016
PubMed
Summary
This summary is machine-generated.

Severe sepsis triggers coagulation system activation, leading to organ dysfunction. Understanding the interplay between inflammation and hemostasis is key for developing new treatments targeting coagulation pathways.

Keywords:
CoagulationCoagulation inhibitorsDisseminated intravascular coagulationInflammationSepsis

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Design of Cecal Ligation and Puncture and Intranasal Infection Dual Model of Sepsis-Induced Immunosuppression
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Area of Science:

  • Biomedical Science
  • Pathophysiology
  • Critical Care Medicine

Background:

  • Severe sepsis involves systemic coagulation activation, with significant cross-talk between hemostasis and inflammation.
  • This interaction is implicated in the pathogenesis of organ dysfunction observed in sepsis patients.

Purpose of the Study:

  • To detail the molecular mechanisms underlying inflammation-induced coagulation.
  • To explore how coagulation influences inflammation in sepsis.
  • To discuss the implications for organ dysfunction and potential therapeutic strategies.

Main Methods:

  • Review of existing evidence on inflammation-hemostasis interactions in sepsis.
  • Analysis of molecular pathways involved in coagulation activation and inhibition.
  • Examination of fibrinolysis and its regulation.

Main Results:

  • Pro-inflammatory mediators activate coagulation and downregulate anticoagulant mechanisms.
  • Tissue factor expression initiates coagulation, inadequately countered by tissue factor pathway inhibitor.
  • Protein C system and fibrinolysis (via PAI-1) are impaired, leading to microvascular clot deposition and tissue ischemia.

Conclusions:

  • Sepsis-induced coagulation activation, characterized by increased fibrin generation and impaired breakdown, contributes to organ dysfunction.
  • Primary management involves antibiotics and source control.
  • Adjunctive therapies targeting coagulation, such as anticoagulants, show promise in experimental and early clinical studies.