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相关概念视频

Coagulation01:09

Coagulation

5.9K
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...
5.9K
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

6.8K
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...
6.8K
Introduction to Hemostasis01:05

Introduction to Hemostasis

6.9K
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,...
6.9K
Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

5.2K
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.
5.2K
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...
659
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

5.5K
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...
5.5K

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相关实验视频

Updated: Jun 18, 2025

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
09:38

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

Published on: February 14, 2017

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常规的凝血 常规的凝血

Emmanuel J Favaloro1, Leonardo Pasalic2

  • 1Haematology, Sydney Centres for Thrombosis and Haemostasis, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; School of Dentistry and Medical Sciences, Charles Sturt University, Wagga Wagga, New South Wales, Australia; School of Medical Sciences, University of Sydney, Westmead Hospital, Westmead, New South Wales, Australia.

Clinics in laboratory medicine
|August 1, 2024
PubMed
概括
此摘要是机器生成的。

在血液学实验室中,常规的凝血测试,包括前激素时间 (PT) 和激活的部分血栓形成时间 (aPTT),是必不可少的. 由于实际考虑,并非所有血液静止测试都包括在常规面板中.

关键词:
激活的部分血栓塑时间.D-二聚子 D-二聚子纤维素原蛋白是一种纤维素.质血红素时间 (Prothrombin time) 是什么?常规的凝血 常规的凝血血栓激素时间

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Assessment of Plasma Coagulation on Liver Tissue in a Large Animal Model In Vivo
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Assessment of Plasma Coagulation on Liver Tissue in a Large Animal Model In Vivo

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Author Spotlight: Advancing Thrombolytic Testing by Integrating Flow Dynamics in In Vitro Models
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相关实验视频

Last Updated: Jun 18, 2025

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
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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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Assessment of Plasma Coagulation on Liver Tissue in a Large Animal Model In Vivo
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Assessment of Plasma Coagulation on Liver Tissue in a Large Animal Model In Vivo

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科学领域:

  • 临床病理学 临床病理学
  • 血液学 血液学 血液学
  • 血液静止测试 血液静止测试

背景情况:

  • 常规的凝血测试对于诊断和监测血液静止障碍至关重要.
  • 血液学实验室通常为紧急的临床需求提供24/7的核心测试.

研究的目的:

  • 定义临床血液学中"常规凝血"测试的范围.
  • 为了确定特定的静血定位测定通常包括在紧急实验室面板中.

主要方法:

  • 对常见的血液静止测试实验室实践的审查.
  • 在紧急和常规环境中经常订购的测试的识别.

主要成果:

  • 常规凝血面板通常包括前血时间 (PT),国际正常化比率 (INR) 和激活的部分血栓形成时间 (aPTT).
  • 在某些情况下,血栓激素时间,D-二聚体和纤维素原测试也可能被认为是常规的.
  • 其他血液静止测试虽然可行,但通常不包括在所有常规实验室产品中.

结论:

  • 常规凝血测试的定义是围绕一组核心的基本血静测试.
  • 从常规面板中排除某些测试是基于实际和临床实用性的考虑.