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Related Concept Videos

Coagulation01:09

Coagulation

9.2K
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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Coagulation01:06

Coagulation

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Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Disorders of Hemostasis01:24

Disorders of Hemostasis

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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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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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Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

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Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
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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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Updated: Dec 12, 2025

Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients
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[Coagulation dysfunction in COVID-19].

Yiming Xu1, Dandan Lyu1, Kejing Ying1

  • 1Department of Respiratory Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310016, China.

Zhejiang Da Xue Xue Bao. Yi Xue Ban = Journal of Zhejiang University. Medical Sciences
|August 8, 2020
PubMed
Summary
This summary is machine-generated.

Patients with coronavirus disease 2019 (COVID-19) experience coagulation dysfunction, increasing risks of thrombosis and bleeding. Understanding this dynamic process is key for effective prevention and treatment strategies.

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In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time
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Area of Science:

  • Hematology
  • Infectious Diseases
  • Immunology

Background:

  • Coronavirus disease 2019 (COVID-19) presents with diverse clinical manifestations.
  • Coagulation dysfunction, including thrombosis and bleeding risks, is a significant complication in COVID-19 patients.
  • The severity of COVID-19 correlates with the degree of coagulation abnormalities.

Purpose of the Study:

  • To review current research on coagulation dysfunction in COVID-19.
  • To elucidate the mechanisms linking immune/inflammatory responses to coagulation issues.
  • To provide insights for clinical management and future research.

Main Methods:

  • Literature review of studies on COVID-19 and coagulation.
  • Analysis of the relationship between immune response and hemostasis.
  • Synthesis of findings on disseminated intravascular coagulation (DIC) in COVID-19.

Main Results:

  • COVID-19 induces a dynamic coagulation dysfunction.
  • Immune and inflammatory imbalances are primary drivers of this dysfunction.
  • Disseminated intravascular coagulation (DIC) can occur and is linked to disease severity.

Conclusions:

  • Early detection and management of COVID-19-associated coagulation dysfunction are crucial.
  • Understanding the pathobiology can guide therapeutic interventions.
  • Further research is needed to optimize patient outcomes.