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Related Concept Videos

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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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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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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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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Introduction to Hemostasis01:05

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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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Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

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After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
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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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Related Experiment Video

Updated: Jun 8, 2025

In Vitro Microfluidic Disease Model to Study Whole Blood-Endothelial Interactions and Blood Clot Dynamics in Real-Time
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Machine-Learning Applications in Thrombosis and Hemostasis.

Henning Nilius1,2, Michael Nagler1

  • 1Department of Clinical Chemistry, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.

Hamostaseologie
|November 5, 2024
PubMed
Summary
This summary is machine-generated.

Machine learning (ML) in medicine offers transformative potential but faces trust issues. This review details ML concepts, pitfalls, and a framework for developing reliable clinical algorithms, particularly in thrombosis and hemostasis.

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Area of Science:

  • Medicine
  • Computer Science
  • Biotechnology

Background:

  • Machine learning (ML) is a disruptive technology with widespread applications.
  • Concerns exist regarding the trustworthiness and regulatory oversight of ML in clinical settings.
  • Past challenges highlight the need for careful development of ML models for medical use.

Purpose of the Study:

  • To explain fundamental machine learning concepts.
  • To present examples of ML applications in thrombosis and hemostasis.
  • To outline a framework for developing effective clinical ML algorithms.

Main Methods:

  • Review of basic machine learning principles.
  • Illustrative examples from thrombosis and hemostasis research.
  • Discussion of common pitfalls in ML model development.
  • Presentation of a methodological framework for clinical ML.

Main Results:

  • ML algorithms have significant potential in medicine but require careful implementation.
  • Physician and researcher involvement is crucial throughout the ML development lifecycle.
  • Addressing bias, inequality, and transparency is key to clinical adoption.

Conclusions:

  • A structured approach and collaborative development are essential for trustworthy clinical ML.
  • The proposed framework aims to guide the creation of effective and reliable ML tools for healthcare.
  • Continued research and physician-scientist partnerships will advance ML in medical applications.