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相关概念视频

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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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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Disorders of Hemostasis01:24

Disorders of Hemostasis

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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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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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Blood Transfusion and Agglutination02:45

Blood Transfusion and Agglutination

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Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...
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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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相关实验视频

Updated: Jun 14, 2025

Author Spotlight: Deciphering Coagulation Disorders in Traumatic Brain Injury Patients
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COVID-19 凝血病 凝血病 是一种疾病.

Andrew Rettew1, Ian Garrahy1, Shoja Rahimian1

  • 1Tower Health System, Reading Hospital, West Reading, PA 19611, USA.

Life (Basel, Switzerland)
|August 29, 2024
PubMed
概括
此摘要是机器生成的。

由于血管损伤,COVID-19是一种呼吸系统疾病,经常导致血液凝块 (血栓). 这篇评论探讨了COVID-19的情况.

关键词:
这就是SARS-CoV-2病毒.凝血病是一种凝血病.血管病变是一种血管病变.

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科学领域:

  • 心血管医学 心血管医学
  • 传染性疾病 传染性疾病
  • 血液学 血液学 血液学

背景情况:

  • 冠状病毒疾病2019 (COVID-19),由SARS-CoV-2引起,主要是一种呼吸道感染.
  • 系统性血管干扰是一种常见的并发症,导致动脉和静脉血栓形成.
  • 了解COVID-19对循环系统的影响对于患者管理至关重要.

研究的目的:

  • 审查COVID-19和血栓形成之间的关联.
  • 阐明COVID-19相关的凝血病和血管病的病理生理学.
  • 讨论临床表现,争议 (例如,长期COVID),以及目前预防和治疗血栓的指南.

主要方法:

  • 文献审查侧重于COVID-19和血栓形成.
  • 分析COVID-19凝血病的病理生理机制.
  • 讨论临床表现和诊断方面的考虑.
  • 综合目前关于预防和治疗策略的证据.

主要成果:

  • COVID-19 感染显著增加了静脉和动脉血栓栓塞事件的风险.
  • 不同的病理生理路径有助于COVID-19凝血病和血管病.
  • 临床表现范围从深静脉血栓症到动脉封闭.
  • 区分COVID-19血管病变与传播性血管内凝血 (DIC) 是很重要的.

结论:

  • COVID-19对血栓并发症构成重大风险,需要仔细监测和管理.
  • 需要进一步的研究来充分了解长期的血栓形成风险和"长期COVID"现象.
  • 对于感染SARS-CoV-2的患者,建议遵守目前预防和治疗血栓的指南.