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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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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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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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Overview of the Cardiovascular System01:14

Overview of the Cardiovascular System

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The cardiovascular system is a vital transportation system in the body. It comprises the heart and blood vessels and facilitates the exchange of gases, nutrients, and waste products.
Heart
The heart is the central pump of the cardiovascular system that circulates blood throughout the body. It comprises two atria receiving the blood and two ventricles pumping blood out of the heart. Their rhythmic contractions, called heartbeats, ensure that blood flow remains continuous.
Blood Vessels
Blood...
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Overview of Systemic Arteries01:11

Overview of Systemic Arteries

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The human body is a complex, well-organized machine, and at the heart of its operations lies the circulatory system. This network of blood vessels, which includes systemic arteries, plays a vital role in maintaining life by transporting nutrients, oxygen, and waste products to and from cells throughout the body.
Systemic circulation is the part of the cardiovascular system that carries oxygenated blood away from the heart to the body's tissues and returns deoxygenated blood back to the...
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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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Overview of the coagulation system.

Sanjeev Palta1, Richa Saroa1, Anshu Palta2

  • 1Department of Anaesthesiology and Intensive Care, Government Medical College and Hospital, Chandigarh, India.

Indian Journal of Anaesthesia
|December 24, 2014
PubMed
Summary

Understanding the blood coagulation system is crucial in anesthesia. New insights clarify the balance between clot formation and inhibition, essential for managing perioperative bleeding and thrombosis risks.

Keywords:
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Area of Science:

  • Anesthesiology
  • Hematology
  • Physiology

Background:

  • The understanding of the blood coagulation system has evolved significantly in anesthesiology.
  • The traditional extrinsic and intrinsic pathways are still valid, but newer insights offer a more authentic description of hemostasis.
  • Normal coagulation involves a balance between procoagulant and anticoagulant mechanisms.

Purpose of the Study:

  • To review the evolving understanding of the coagulation system in anesthetic practice.
  • To highlight the importance of understanding hemostasis for managing perioperative coagulation abnormalities.
  • To emphasize the need for clinicians to interpret diagnostic tests for coagulation disorders.

Main Methods:

  • A systematic literature search was conducted on PubMed.
  • MeSH terms used included 'coagulation system', 'haemostasis', and 'anaesthesia'.
  • Twenty-eight clinical trials and review articles published in the last 10 years were identified.

Main Results:

  • The coagulation system is a dynamic process with a balance between clot formation and inhibition.
  • Imbalances can lead to thrombosis or bleeding, particularly in the perioperative period or critical illness.
  • Understanding the physiological basis of hemostasis is mandatory for diagnosis and management.

Conclusions:

  • Clinicians must grasp the physiological basis of hemostasis to manage coagulation abnormalities effectively.
  • An updated understanding of coagulation is vital for safe anesthetic practice.
  • Recognizing the balance of hemostasis aids in diagnosing and interpreting coagulation tests.