低·维勒布兰德因素 - - 解开一个团包裹在一个难题
James S O'Donnell1, Ross I Baker2, Ferdows Atiq3
1Irish Centre for Vascular Biology, School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland; National Coagulation Centre, St James's Hospital, Dublin, Ireland; Irish-Australian Blood Collaborative (IABC) Network.
Journal of thrombosis and haemostasis : JTH
|September 12, 2024
概括
讨论了2021年指南,将低威尔布兰德因子 (VWF) 水平 (30-50 IU/dL) 归类为1型VWD. 这篇文章澄清了VWD类型1异质性,并提出了一种诊断算法,以防止过度诊断.
科学领域:
- 血液学 血液学 血液学
- 临床诊断 临床诊断 临床诊断
- 遗传学 遗传学 是一个
背景情况:
- 2021年ASH ISTH NHF WFH指南建议将VWF水平为30-50 IU/dL,出血增加的患者归类为1型VWD,这一决定引起了争议.
- 最近的数据表明,部分定量VWF缺陷表现出年龄依赖的表型,支持将低VWF归类为异质1型VWD中的一个子组.
- 1型VWD的异质性带来了重大诊断挑战,需要仔细评估以避免误诊.
研究的目的:
- 为了解决围绕1型VWD的分类所引起的争议.
- 澄清1型VWD的异质性及其诊断影响.
- 提出1型VWD的诊断算法,以防止过度诊断,并确保及时获得护理.
主要方法:
- 关于VWF缺陷表型的最新数据的审查.
- 分析1型VWD的诊断挑战.
- 开发一种用于1型VWD诊断的拟议算法.
主要成果:
- 部分定量VWF缺陷显示了依赖年龄的演变表型.
- 低VWF被证实是异质型1VWD中的一个子组.
- 提出了一个诊断算法来解决诊断挑战.
结论:
- 由于VWD类型1的异质性,VWF水平在30-50 IU/dL之间的分类需要仔细考虑.
- 拟议的算法旨在防止1型VWD的过度诊断,特别是在有较少出血史的人群中.
- 优化诊断对于适当的患者管理和获得医疗保健至关重要.
相关概念视频
Extrinsic and Intrinsic Pathways of Hemostasis
6.5K
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...
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...
6.5K
Formation of the Platelet Plug
5.3K
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...
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...
5.3K
Anticoagulant Drugs: Low-Molecular-Weight Heparins
652
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...
652
Clot Retraction and Fibrinolysis
4.9K
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.
4.9K
Disorders of Hemostasis
740
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.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
740
Coagulation
5.6K
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...
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...
5.6K


