Venturi effect simulating stenosis in hemodialysis arteriovenous fistulas.

IF 1.6 3区医学 Q3 PERIPHERAL VASCULAR DISEASE

Journal of Vascular Access Pub Date : 2025-06-04 DOI:10.1177/11297298251345179

George Neves-Almeida, Edna Maria de Faria Viana, Marcos Rocha Vianna, Nathalia Sernizon Guimarães, Daniel Mendes-Pinto, André Alves Elias, Lívia Fagundes Dos Anjos Araújo, Maria da Glória Rodrigues-Machado

{"title":"Venturi effect simulating stenosis in hemodialysis arteriovenous fistulas.","authors":"George Neves-Almeida, Edna Maria de Faria Viana, Marcos Rocha Vianna, Nathalia Sernizon Guimarães, Daniel Mendes-Pinto, André Alves Elias, Lívia Fagundes Dos Anjos Araújo, Maria da Glória Rodrigues-Machado","doi":"10.1177/11297298251345179","DOIUrl":null,"url":null,"abstract":"Background: A collapse phenomenon associated with stenoses was observed during Doppler ultrasound (DUS) examinations in arteriovenous fistulas (AVFs).Aim: To investigate the influence of the phenomenon over the diagnosis of stenosis, its prevalence and cause.Method: Comparison of luminal diameters before and during downstream compression of the efferent vein (DCEV); retrospective cross-sectional analysis of the prevalence; and theoretical analysis based on cardiovascular physiology and flow mechanicals and analysis of pressure gradients.Results: DCEV increased the luminal diameter at the phenomenon sites from 1.64 ± 0.78 mm to 4.03 ± 1.42 mm (p < 0.0001). The prevalence of the phenomenon was 11.3% (25) between 221 different AVFs and 16.6% (25) between 150 AFVs with stenoses. Pressure gradients in systole (147.9 ± 67.15 mmHg) and diastole (66.74 ± 37.7 mmHg) indicated intraluminal low pressures at the phenomenon sites.Conclusions: The collapse phenomenon can simulate AVF stenoses ⩾50% in DUS examinations, have an important and high prevalence between AVFs with stenoses and is compatible with the Venturi effect.","PeriodicalId":56113,"journal":{"name":"Journal of Vascular Access","volume":" ","pages":"11297298251345179"},"PeriodicalIF":1.6000,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Vascular Access","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1177/11297298251345179","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PERIPHERAL VASCULAR DISEASE","Score":null,"Total":0}

引用次数: 0

Abstract

Background: A collapse phenomenon associated with stenoses was observed during Doppler ultrasound (DUS) examinations in arteriovenous fistulas (AVFs).

Aim: To investigate the influence of the phenomenon over the diagnosis of stenosis, its prevalence and cause.

Method: Comparison of luminal diameters before and during downstream compression of the efferent vein (DCEV); retrospective cross-sectional analysis of the prevalence; and theoretical analysis based on cardiovascular physiology and flow mechanicals and analysis of pressure gradients.

Results: DCEV increased the luminal diameter at the phenomenon sites from 1.64 ± 0.78 mm to 4.03 ± 1.42 mm (p < 0.0001). The prevalence of the phenomenon was 11.3% (25) between 221 different AVFs and 16.6% (25) between 150 AFVs with stenoses. Pressure gradients in systole (147.9 ± 67.15 mmHg) and diastole (66.74 ± 37.7 mmHg) indicated intraluminal low pressures at the phenomenon sites.

Conclusions: The collapse phenomenon can simulate AVF stenoses ⩾50% in DUS examinations, have an important and high prevalence between AVFs with stenoses and is compatible with the Venturi effect.

查看原文本刊更多论文

模拟血液透析动静脉瘘狭窄的文丘里效应。

背景：在动静脉瘘（AVFs）的多普勒超声（DUS）检查中观察到一种与狭窄相关的塌陷现象。目的：探讨该现象对狭窄诊断的影响、发生率及原因。方法：比较下行压出静脉（DCEV）前和下行压出静脉（DCEV）时的管径；流行率的回顾性横断面分析；并基于心血管生理学和血流力学的理论分析和压力梯度分析。结果：DCEV将现象部位的管腔直径从1.64±0.78 mm增加到4.03±1.42 mm (p)结论：塌陷现象可以在DUS检查中模拟AVF狭窄小于50%，在AVF狭窄之间具有重要和高的患病率，并且与文丘里效应相容。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Vascular Access 医学-外周血管病

CiteScore

3.40

自引率

31.60%

发文量

181

审稿时长

6-12 weeks

期刊介绍： The Journal of Vascular Access (JVA) is issued six times per year; it considers the publication of original manuscripts dealing with clinical and laboratory investigations in the fast growing field of vascular access. In addition reviews, case reports and clinical trials are welcome, as well as papers dedicated to more practical aspects covering new devices and techniques. All contributions, coming from all over the world, undergo the peer-review process. The Journal of Vascular Access is divided into independent sections, each led by Editors of the highest scientific level: • Dialysis • Oncology • Interventional radiology • Nutrition • Nursing • Intensive care Correspondence related to published papers is also welcome.