相关实验视频
Updated: Jan 28, 2026

07:34
Two-vessel Occlusion Mouse Model of Cerebral Ischemia-reperfusion
Published on: March 1, 2019
12.3K
延长的静脉通行与在反的前面循环中有利的临床恢复的可能性较低,大血管封闭性中风
Vivek S Yedavalli1, Manisha Koneru2, Aneri B Balar1
1Department of Radiology and Radiological Sciences Johns Hopkins School of Medicine Baltimore MD.
Stroke (Hoboken, N.J.)
|January 26, 2026
概括
在急性缺血性中风患者中,长时间的静脉过渡 (PVT) 与大血管封闭有关,与较差的恢复有关. 这种成像标记可能有助于预测在再注射治疗后的临床结果.
科学领域:
- 神经学 神经学
- 放射学 放射学是一门学科.
- 血管医学 血管医学
背景情况:
- 在急性缺血性中风 (AIS) 中,尽管反,但具有大血管封闭 (LVOs) 的不良结果与静脉外流不良有关.
- 延长静脉通道 (PVT) 是一种新的输液成像替代品,用于评估静脉外流.
- 评估PVT与临床康复的关联对于优化AIS治疗至关重要.
研究的目的:
- 评估延长静脉通道 (PVT) 和在AIS患者的良好的临床康复之间的关系.
- 为了确定PVT是否是后再输血治疗后临床结果的预测因素.
- 确定PVT作为中风管理中的潜在辅助成像参数.
主要方法:
- 对从2017-2022年收集的前性数据进行回顾性分析.
- 连续包括由LVOs引起的成功转流前循环AIS的患者.
- 评估PVT (通过特定静脉鼻的时间延迟来定义) 和其与90天修改的兰金度量得分 (0-2) 的关联,使用多变量逻辑回归.
主要成果:
- 总共有127名患者被分析,其中31.5%被确定为PVT+.
- PVT+与较低的有利临床康复可能性显著相关 (aOR,0.23;P = 0.02).
- 晚年也与较差的结果有显著的关联 (aOR,0.92;P = 0.01).
结论:
- 延长的静脉过渡 (PVT) 与AIS患者的临床恢复的可能性降低,这些患者患有LVOs,经历了成功的再输血.
- PVT可以作为一个有价值的辅助成像参数来预测临床结果.
- 进一步研究PVT在中风管理中的作用是有必要的.
相关概念视频
Properties of Transition Metals
29.7K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
29.7K
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
335
The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
335
Phase Transitions
23.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.1K
Gibbs Free Energy and Thermodynamic Favorability
8.2K
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
8.2K
Cooperative Allosteric Transitions
8.7K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.7K
Phase Transitions: Vaporization and Condensation
20.9K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
20.9K

