温图里效应模拟血液透析中的狭窄动脉静脉囊
George Neves-Almeida1,2, Edna Maria de Faria Viana3, Marcos Rocha Vianna3
1Postgraduate Program in Health Sciences, FCMMG, Belo Horizonte, Minas Gerais, Brazil.
The journal of vascular access
|June 4, 2025
概括
动脉静脉 (AVF) 中的崩现象可以在多普勒超声波期间模仿显著的狭窄. 这一发现对于准确的AVF狭窄症诊断和管理至关重要.
科学领域:
- 血管外科 血管外科
- 诊断成像 诊断成像 诊断成像
- 心血管生理学心血管生理学
背景情况:
- 在动脉静脉 (AVFs) 的多普勒超声波 (DUS) 期间观察到崩现象.
- 这种现象与狭窄症有关,可能会影响诊断的准确性.
研究的目的:
- 调查崩现象对AVFs狭窄症诊断的影响.
- 确定这种现象的流行率和潜在原因.
主要方法:
- 照射直径的比较,并没有下游压缩的阴静脉 (DCEV).
- 对AVF中现象流行率的回顾性横截面分析.
- 使用心血管生理学,流体力学和压力梯度的理论分析.
主要成果:
- DCEV显著增加了现象部位的光径 (1.64毫米至4.03毫米,p < 0.0001).
- 在所有AVF患者中,患病率为11.3%,在患有狭窄症的AVF患者中为16.6%.
- 在现象部位的低内压力被压力梯度表明.
结论:
- 崩现象可以模拟在DUS.US上50%或更多的动脉静脉紧缩.
- 这种现象具有显著的流行率,特别是在已经存在狭窄的AVF患者中.
- 这些发现与Venturi效应作为潜在机制是一致的.
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