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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

837
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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Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

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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...
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Coagulation01:09

Coagulation

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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.
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...
6.2K
Introduction to Hemostasis01:05

Introduction to Hemostasis

7.3K
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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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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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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Updated: Jun 24, 2025

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

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Organ Dysfunction in Sepsis-associated Intravascular Coagulation.

Marcel Levi, Toshiaki Iba

    Juntendo Iji Zasshi = Juntendo Medical Journal
    |June 10, 2024
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    Summary
    This summary is machine-generated.

    Disseminated intravascular coagulation (DIC) in sepsis contributes to organ damage by causing microvascular thrombi and impairing tissue perfusion. Understanding this thromboinflammation is key for managing sepsis and acute kidney injury (AKI).

    Keywords:
    acute kidney injurydisseminated intravascular coagulationneutrophilsepsisthrombus

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    Area of Science:

    • Critical care medicine
    • Hematology
    • Pathophysiology

    Background:

    • Sepsis often leads to disseminated intravascular coagulation (DIC) and multiple organ damage.
    • DIC is increasingly recognized as a contributor to, not just a complication of, organ dysfunction in sepsis.
    • Microvascular thrombus formation impairs tissue perfusion, driving organ damage.

    Purpose of the Study:

    • To elucidate the role of thromboinflammation in sepsis-associated DIC and organ dysfunction.
    • To highlight the mechanisms linking sepsis, DIC, and acute kidney injury (AKI).

    Main Methods:

    • Review of existing literature on sepsis pathophysiology.
    • Analysis of mechanisms involving neutrophils, platelets, endothelial injury, and coagulation/fibrinolysis imbalance.

    Main Results:

    • Sepsis-associated DIC involves thromboinflammation driven by activated neutrophils, platelets, and endothelial injury.
    • Microvascular thrombosis in DIC leads to impaired tissue perfusion and organ damage, particularly AKI.
    • The severity of AKI in sepsis correlates strongly with the severity of sepsis and DIC.

    Conclusions:

    • Thromboinflammation is a central mechanism in sepsis-associated DIC and organ damage.
    • Understanding these pathways is crucial for effective sepsis management, especially concerning AKI.
    • Targeting thromboembolic pathways may offer therapeutic strategies for sepsis-induced organ dysfunction.