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Anticoagulant Drugs: Low-Molecular-Weight Heparins

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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...

Introduction to Hemostasis

Introduction to Hemostasis

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,...

Extrinsic and Intrinsic Pathways of Hemostasis

Extrinsic and Intrinsic Pathways of Hemostasis

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...

Formation of the Platelet Plug

Formation of the Platelet Plug

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...

Disorders of Hemostasis

Disorders of Hemostasis

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.

Coagulation

Coagulation

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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Updated: Jul 2, 2025

TAPE: A Biodegradable Hemostatic Glue Inspired by a Ubiquitous Compound in Plants for Surgical Application

TAPE: A Biodegradable Hemostatic Glue Inspired by a Ubiquitous Compound in Plants for Surgical Application

Published on: June 8, 2016

Recent Advances in Topical Hemostatic Materials.

Yang Liu¹, Yi Zhang¹, Weifeng Yao¹

¹Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, National and Local Collaborative Engineering Centre of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province China.

ACS Applied Bio Materials

|February 19, 2024

Summary

Advanced hemostatic materials, particularly nanomaterials, offer improved solutions for traumatic bleeding emergencies. Future research aims to develop multifunctional materials for enhanced wound healing.

Keywords:

Coagulation cascade reactions Fibrin clots formation Hemostatic materials Platelet aggregation Water absorption capacity

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Area of Science:

Biomaterials Science
Nanotechnology
Emergency Medicine

Background:

Traumatic bleeding poses significant risks, including secondary injuries and mortality.
Traditional hemostatic methods are insufficient for complex bleeding situations.
Advancements necessitate novel topical hemostatic materials.

Purpose of the Study:

To review current topical hemostatic materials.
To summarize the applications and mechanisms of various hemostatic agents.
To highlight the potential of hemostatic nanomaterials.

Main Methods:

Literature review of inorganic, biological, polysaccharide, and carbon-based hemostatic materials.
Focus on hemostatic nanomaterials with key properties.
Analysis of material advantages and disadvantages.

Main Results:

Various hemostatic materials have distinct pros and cons.
Hemostatic nanomaterials exhibit superior adhesion, biocompatibility, low toxicity, and high adsorption.
Current materials address limitations of traditional methods.

Conclusions:

Hemostatic nanomaterials show great promise for managing traumatic bleeding.
Future directions include developing multifunctional hemostatic materials.
Multifunctional materials should incorporate hemostasis, antibacterial, and anti-inflammatory properties to promote wound healing.