Surveillance of Hemodialysis Vascular Access with Ultrasound Vector Flow Imaging

Andreas Hjelm Brandt, Jacob Bjerring Olesen, Kristoffer Lindskov Hansen, Marianne Rix, Jørgen Arendt Jensen, Michael Bachmann Nielsen

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Abstract

The aim of this study was prospectively to monitor the volume flow in patients with arteriovenous fistula (AVF) with the angle independent ultrasound technique Vector Flow Imaging (VFI). Volume flow values were compared with Ultrasound dilution technique (UDT). Hemodialysis patients need a well-functioning vascular access with as few complications as possible and preferred vascular access is an AVF. Dysfunction due to stenosis is a common complication, and regular monitoring of volume flow is recommended to preserve AVF patency. UDT is considered the gold standard for volume flow surveillance, but VFI has proven to be more precise, when performing single repeated instantaneous measurements. Three patients with AVF were monitored with UDT and VFI monthly for five months. A commercial ultrasound scanner with a 9 MHz linear array transducer with integrated VFI was used to obtain data. UDT values were obtained with Transonic HD03 Flow-QC Hemodialysis Monitor. Three independent measurements at each scan session were obtained with UDT and VFI each month. Average deviation of volume flow between UDT and VFI was 25.7 % (Cl: 16.7% to 34.7%) (p= 0.73). The standard deviation for all patients, calculated from the mean variance of each individual scan sessions, was 199.8 ml/min for UDT and 47.6 ml/min for VFI (p = 0.002). VFI volume flow values were not significantly different from the corresponding estimates obtained using UDT, and VFI measurements were more precise than UDT. The study indicates that VFI can be used for surveillance of volume flow.
Original languageEnglish
Title of host publicationProceedings of SPIE
EditorsJohan G. Bosch, Neb Duric
Number of pages7
Volume9419
PublisherSPIE - International Society for Optical Engineering
Publication date2015
Article number94190U
DOIs
Publication statusPublished - 2015
EventSPIE Medical Imaging 2015 - Orlando, FL, United States
Duration: 21 Feb 201526 Feb 2015

Conference

ConferenceSPIE Medical Imaging 2015
CountryUnited States
CityOrlando, FL
Period21/02/201526/02/2015
SeriesProceedings of SPIE, the International Society for Optical Engineering
Volume9419
ISSN0277-786X

Bibliographical note

Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Keywords

  • Vector flow imaging
  • Arteriovenous fistula
  • Volume flow surveillance

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