相关实验视频
Updated: Feb 17, 2026

06:47
Microfluidics in Assessing Platelet Function
Published on: November 8, 2024
1.7K
·维勒布兰德因子动态在创伤管理与体外生命支持的创伤
Teryn R Roberts1, Pamella A Villalobos2, Eric B Bigon2
1Autonomous Reanimation and Evacuation Research Institute, The Geneva Foundation, San Antonio, TX, USA; University of the Incarnate Word School of Osteopathic Medicine, San Antonio, TX, USA.
Journal of thrombosis and haemostasis : JTH
|February 15, 2026
概括
身体外生命支持 (ECLS) 可以通过影响·维勒布兰德因子 (VWF) 引起出血. 创伤患者在ECLS上经历的VWF耗尽较少,但改变了VWF功能,表明获得VWF综合征的风险.
科学领域:
- 心血管医学 心血管医学
- 血液学 血液学 血液学
- 临界护理医学 临界护理医学
背景情况:
- 身体外生命支持 (ECLS) 与由于ADAMTS13过度切割威兰德因子 (VWF) 的出血有关,导致获得的威兰德综合征 (AVWS).
- 高分子量VWF多重体 (VWF-HMWM) 对于凝血至关重要,它们的水平受到急性阶段反应和ADAMTS13活动的影响.
研究的目的:
- 为了在ECLS期间比较VWF-HMWM降解和VWF:原结合活性 (CB) /VWF:抗原 (Ag) 的比率,在急性创伤与非受伤的环境中.
- 评估ECLS和创伤对VWF结构功能关系和ADAMTS13活动的影响.
主要方法:
- 使用猪模型,随机分为多创伤 (INJ-CTRL),未受伤的ECLS (ECLS-CTRL) 和多创伤与ECLS (ECLS-INJ) 组.
- 在基线和72小时内测量了VWF:Ag,VWF:CB,VWF多元尺寸分布和ADAMTS13活性.
- ECLS组接受了氨酸抗凝药或没有系统性抗凝药.
主要成果:
- 在ECLS-CTRL中发生了72小时的VWF-HMWM耗尽,但在ECLS-INJ中没有.
- 在两组ECLS中,VWF:CB/VWF:Ag比率显著下降,但在INJ-CTRL中没有.
- 在所有组中,ADAMTS13活性下降;肝素减轻了VWF-HMWM降解,并保持了VWF:CB/VWF:Ag比率和ADAMTS13活性.
结论:
- 在ECLS中创伤患者的VWF:CB/VWF:Ag比率降低,ADAMTS13活性降低,VWF-HMWM耗尽最小.
- 这些发现凸显了受ECLS创伤患者中AVWS的潜在风险.
- 氨酸部分抵消了ECLS对VWF和ADAMTS13的不良影响,这表明它可能具有治疗作用.
相关概念视频
Extrinsic and Intrinsic Pathways of Hemostasis
13.4K
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...
13.4K
Introduction to Hemostasis
14.8K
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,...
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,...
14.8K
Coagulation
10.8K
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...
10.8K
Formation of the Platelet Plug
9.6K
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...
9.6K
Vascular Spasm
3.9K
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
3.9K
Clot Retraction and Fibrinolysis
9.2K
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.
9.2K

