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Related Concept Videos

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...
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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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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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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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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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Introduction to Hemostasis01:05

Introduction to Hemostasis

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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.
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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Related Experiment Video

Updated: Dec 18, 2025

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

Simona Pierini1, Eufemia Incampo1, Daniela Bokor1

  • 1U.O.C. Cardiologia-UTIC.

Giornale Italiano Di Cardiologia (2006)
|June 20, 2020
PubMed
Summary

The COVID-19 pandemic is linked to systemic inflammation, causing blood clotting issues and venous thromboembolism. Understanding these coagulopathy mechanisms is crucial for future treatments.

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A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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Area of Science:

  • Medicine
  • Pathophysiology
  • Infectious Diseases

Background:

  • The World Health Organization declared COVID-19 a pandemic on March 11, 2020.
  • Italian physicians were among the first to manage COVID-19 patients.
  • Clinical observations revealed a systemic inflammatory response alongside respiratory symptoms.

Purpose of the Study:

  • To review the literature on COVID-19-associated coagulopathy.
  • To understand the pathophysiological mechanisms of COVID-19-induced coagulation disorders.
  • To inform future clinical and therapeutic strategies.

Main Methods:

  • Literature review of available scientific publications.
  • Analysis of clinical observations regarding COVID-19 and coagulation.
  • Synthesis of pathophysiological insights into coagulopathy.

Main Results:

  • COVID-19 involves a systemic inflammatory response.
  • This inflammation leads to coagulation disorders.
  • Complications include venous thromboembolism and other thrombotic events.

Conclusions:

  • Coagulopathy is a significant complication of COVID-19.
  • Further understanding of its mechanisms is needed.
  • This knowledge will guide clinical management and therapy development.