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Related Concept Videos

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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Phases of Wound Repair01:28

Phases of Wound Repair

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Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
Formation of Blood Clot
In case of deep injuries, trauma to blood vessels results in blood loss. In the meantime, phospholipids released from the ruptured endothelial cellular membrane are converted into arachidonic...
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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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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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Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
7.7K
Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

Inflammatory Response II: Inflammatory Exudate and Tissue Repair

6.0K
The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
The typical wound exudate is odorless, transparent, straw-colored, thin, and watery. Exudate, however, can differ depending on the state of wound healing. Likewise, the...
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TAPE: A Biodegradable Hemostatic Glue Inspired by a Ubiquitous Compound in Plants for Surgical Application
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Polymeric Materials for Hemostatic Wound Healing.

Suvash Ghimire1, Pritha Sarkar1, Kasey Rigby1

  • 1Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32816, USA.

Pharmaceutics
|December 28, 2021
PubMed
Summary

Rapidly stopping battlefield hemorrhage is critical, as most combat deaths occur within 30 minutes. New FDA-approved hemostatic treatments are needed for deep wounds to prevent exsanguination without manual pressure.

Keywords:
bloodhemostasishydrogelsmetalsnanoparticlespolymerwound

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Area of Science:

  • Trauma care
  • Emergency medicine
  • Surgical hemostasis

Background:

  • Hemorrhage is a leading cause of battlefield mortality, responsible for 50% of deaths.
  • Most combat deaths (86%) occur within 30 minutes of injury.
  • Internal or abdominal hemorrhages are difficult to manage with conventional dressings due to inaccessible wound sites.

Purpose of the Study:

  • To address the urgent need for effective hemostatic treatments for severe bleeding in trauma.
  • To develop a novel, user-friendly, FDA-approved hemostatic agent for battlefield application.
  • To enable rapid bleeding control at the point of injury without manual compression.

Main Methods:

  • Development of a unique hemostatic agent delivery system.
  • Focus on rapid application (under 30 seconds).
  • Designed for efficacy in severe bleeding scenarios, including arterial and venous hemorrhage.

Main Results:

  • The proposed treatment aims to stop bleeding within 1-2 minutes.
  • Designed for application on deep wounds, including those in the abdomen, liver, stomach, colon, and spleen.
  • Facilitates immediate intervention by first responders to prevent exsanguination.

Conclusions:

  • An easy-to-use, FDA-approved hemostatic treatment is essential for reducing combat-related deaths.
  • Rapid hemostasis is achievable for severe traumatic injuries, including internal bleeding.
  • This innovation can significantly improve survival rates on the battlefield by enabling quick, effective bleeding control.