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相关概念视频

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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Clot Retraction and Fibrinolysis01:16

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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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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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Disorders of Hemostasis01:24

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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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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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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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相关实验视频

Updated: Jul 25, 2025

Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization
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凝块波形分析用于血液静止异常的分析.

Hideo Wada1, Katsuya Shiraki1, Takeshi Matsumoto2

  • 1Department of Laboratory and General Medicine, Mie Prefectural General Medical Center, Yokkaichi, Japan.

Annals of laboratory medicine
|June 30, 2023
PubMed
概括
此摘要是机器生成的。

凝血波形分析 (CWA) 通过检查凝血测试波形来提供对静血异常的见解. 经过修改的CWA技术在评估各种临床条件下的高凝结率和低凝结率方面表现有前途.

关键词:
凝结波形分析 凝结波形分析纤维化解是一种纤维化解.血液静止 血液静止 血液静止血液静止剂 血液静止剂 是一种血液静止剂.指标和试剂的使用情况.输血组时间 (Prothrombin time) 是指输血组时间.血栓激素 血栓激素 是一种血小板减少症 (Thrombocytopenia) 是一个严重的疾病.血栓友爱症 (英语:Thrombophilia) 是一种血栓友爱症.血栓形成的原因是血栓形成.

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科学领域:

  • 血液学 血液学 血液学
  • 临床病理学 临床病理学
  • 生物医学工程 生物医学工程

背景情况:

  • 凝块波形分析 (CWA) 评估了在APTT,PT和TT等凝结测试期间的血透明度变化.
  • 在CWA导数曲线中异常的波形,峰值时间和高度对于诊断静血异常非常有价值.

研究的目的:

  • 审查常规和修改的凝块波形分析 (CWA) 技术.
  • 讨论CWA在评估血静功能中的临床应用.

主要方法:

  • 基于激活的部分血栓塑时间 (APTT),质血栓时间 (PT) 和血栓时间 (TT) 的常规CWA分析.
  • 修改后的CWA方法的审查,包括使用APTT试剂的PT,稀释PT (sTF/FIXa) 和稀释TT.
  • 检查导数曲线,峰值时间和高度的诊断信息.

主要成果:

  • CWA-sTF/FIXa:高峰高度与高凝血能力相关 (例如,癌症,血栓形成);长时间的峰值时间表明低凝血能力 (例如,因子缺乏,血栓塞缩症).
  • CWA稀释的TT反映了血栓激增的情况.
  • 凝块纤维解析波形分析评估血液静止和纤维解.

结论:

  • 常规和修改的CWA为评估静血异常提供了有价值的数据.
  • 需要进行进一步的研究,以确定CWA-APTT和修改后CWA在各种疾病中的临床相关性和实用性.