高效的静血交联聚烯酸聚合物包裹用于立即静血
Tong Ye1, Zhiyuan Yang1, Ruolin Hao1
1Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China.
Polymers
|March 28, 2024
概括
一种新型高度吸水的聚合物 (HPA) 通过胀和凝结血液,迅速阻止创伤性出血. 这种先进的止血为严重出血控制提供了一个有希望的解决方案.
科学领域:
- 生物材料科学 生物材料科学
- 血液静止研究 血液静止研究
- 聚合物化学 聚合物化学
背景情况:
- 创伤性出血是由于快速流血造成的重大风险.
- 现有的静血生物材料在吸水速度上有局限性,阻碍了快速的出血控制.
- 开发具有增强吸水能力的材料对于有效的血液静止至关重要.
研究的目的:
- 开发和评估一个高度吸水的聚合物 (HPA) 快速静血.
- 为了优化HPA的制备,以改善水的吸收和静血性能.
- 在临床前模型中研究血静机制和HPA的疗效.
主要方法:
- 基于聚烯酸盐的高吸收性聚合物 (HPA) 的合成和优化.
- 评估HPA的吸水能力,胀行为和多孔结构.
- 在体外评估HPA-5粘附和生物相容性.
- 在大鼠股骨和尾部动脉静脉损伤模型中测试HPA的静血能力.
- 将HPA与商用止血剂 (CeloxTM) 的比较.
主要成果:
- 优化的HPA (HPA-5) 显示出快速胀,在2分钟内吸收高达其重量的600倍的水.
- 在实验室中,HPA-5表现出良好的粘附性和生物相容性.
- 在两种动物模型中,HPA显示出明显优越的静血能力,与CeloxTM相比,减少了血液损失和缩短了静血时间.
- 血静机制包括吸水,静电相互作用,血细胞聚合,血小板激活和加速凝血.
结论:
- 这种高度吸水的聚合物 (HPA) 通过快速胀和多种凝结机制有效地实现了快速血静.
- 在临床前模型中,HPA在现有静血剂上表现出优越的性能.
- HPA代表了一种有前途的血液静止,用于控制血管损伤引起的严重出血.
相关概念视频
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
690
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...
690
01:05Introduction to Hemostasis
7.6K
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,...
7.6K
01:20Extrinsic and Intrinsic Pathways of Hemostasis
7.5K
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...
7.5K
01:22Formation of the Platelet Plug
6.1K
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...
6.1K
01:09Coagulation
6.5K
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...
6.5K