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相关概念视频

Introduction to Hemostasis01:05

Introduction to Hemostasis

8.9K
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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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...
911
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

9.2K
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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相关实验视频

Updated: Sep 13, 2025

An Injectable and Drug-loaded Supramolecular Hydrogel for Local Catheter Injection into the Pig Heart
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一种pH触发的可注射聚氨基水凝,具有多生物功能,用于快速静血.

Shuo Li1,2,3, Hongying Lv1,3, Xiaoniu Yang1,2,3

  • 1State Key Laboratory of Polymer Science and Technology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China.

Biomacromolecules
|July 29, 2025
PubMed
概括

这项研究介绍了一种基于聚氨的新型注射水凝,用于伤口愈合. 该材料提供快速血静,机械强度和多种生物功能,解决伤口护理管理的关键挑战.

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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
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Synthesis of Strong Adhesive Hydrogel, Gelatin O-Nitrosobenzaldehyde
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Last Updated: Sep 13, 2025

An Injectable and Drug-loaded Supramolecular Hydrogel for Local Catheter Injection into the Pig Heart
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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
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科学领域:

  • 生物材料科学 生物材料科学
  • 聚合物化学 聚合物化学
  • 伤口愈合技术 伤口愈合技术

背景情况:

  • 可注射水凝对于出血的伤口至关重要,但在平衡机械性能,可注射性和多功能性方面面临挑战.
  • 伤口环境需要静血材料,除了简单的血流控制之外,还具有额外的生物学益处.

研究的目的:

  • 开发一种基于聚氨 (PU) 的静血注射水凝,具有可调节的机械性能和多生物功能.
  • 克服现有的静血水凝在操作,机械完整性和伤口微环境兼容性方面的局限性.

主要方法:

  • 合成了一种基于PU的水凝,其中包含希夫基,用于pH响应的注射性,以及用于生物活性的甲基基.
  • 使用希夫基化学来调节弹性 (在酸性中粘性,在中性pH中弹性) 和甲醇侧组用于静血和其他功能.

主要成果:

  • 实现了PU水凝,可在酸性条件下注射,在中性环境中稳定.
  • 证明了快速的血静,自我愈合,组织粘附,抗菌,抗氧化性质,并通过甲基醇组促进伤口愈合.
  • 在一个水凝系统中成功结合了机械强度,可控注射性和多种生物功能.

结论:

  • 开发的基于PU的水凝为静血注射应用提供了一个有前途的解决方案.
  • 这种材料设计为创建先进的伤口护理解决方案提供了新的视角,提高了有效性和多功能性.