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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

2.8K
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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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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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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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

2.6K
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...
2.6K
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

16.2K
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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Related Experiment Video

Updated: Apr 19, 2026

Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation
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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

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Coagulation abnormalities in sepsis.

Cheng-Ming Tsao1, Shung-Tai Ho1, Chin-Chen Wu2

  • 1Department of Anesthesiology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Anesthesiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan.

Acta Anaesthesiologica Taiwanica : Official Journal of the Taiwan Society of Anesthesiologists
|December 30, 2014
PubMed
Summary
This summary is machine-generated.

Sepsis involves uncontrolled inflammation and blood clotting, leading to organ damage. Inhibiting coagulation and platelet function may improve sepsis outcomes, but requires more clinical validation.

Keywords:
coagulationdisseminated intravascular coagulation (DIC)organ dysfunctionplateletsepsis

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Area of Science:

  • Critical Care Medicine
  • Hematology
  • Pathophysiology

Background:

  • Sepsis is an uncontrolled inflammatory and procoagulant response to infection.
  • Hemostatic changes in sepsis range from subclinical coagulation activation to disseminated intravascular coagulation (DIC).
  • DIC involves microvascular thrombosis, organ dysfunction, and bleeding due to factor consumption.

Purpose of the Study:

  • To explore the potential of inhibiting coagulation and platelet function to mitigate sepsis-induced inflammation and improve patient outcomes.
  • To review the efficacy of anticoagulant and antiplatelet agents in sepsis management.

Main Methods:

  • Analysis of existing clinical trial data, including subgroup analyses of activated protein C, antithrombin, and thrombomodulin.
  • Review of experimental models using antiplatelet drugs (aspirin, P2Y12 inhibitors, glycoprotein IIb/IIIa antagonists).
  • Assessment of diagnostic methods for DIC, including laboratory tests, scoring algorithms, and thromboelastography.

Main Results:

  • Overt coagulation activation in sepsis correlates with better therapeutic effects from inhibitors like activated protein C, antithrombin, and thrombomodulin.
  • Antiplatelet agents showed potential in experimental sepsis models to reduce organ failure and mortality without increasing bleeding risk.
  • Current anticoagulant therapies for sepsis lack established efficacy, with recombinant activated protein C withdrawn due to insufficient efficacy.

Conclusions:

  • Inhibition of coagulation activation and platelet function presents a promising therapeutic strategy for sepsis.
  • Further large-scale, prospective, randomized trials are essential to validate the efficacy and safety of anticoagulant and antiplatelet agents in sepsis treatment.