Center for Fast Ultrasound Imaging

Department of Electrical Engineering

Vector Volume Flow in Arteriovenous Fistulas

for Hemodialysis

Peter Møller Hansen

J.B. Olesen, M.J. Pihl, T. Lange, S. Heerwagen, M.M. Pedersen, M. Rix, L.

Lönn, J.A. Jensen, M.B. Nielsen.

Department of Radiology

Copenhagen University Hospital, Rigshospitalet, Denmark

Center for Fast Ultrasound Imaging, Build. 349

Department of Electrical Engineering

Technical University of Denmark

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

Vector Flow Imaging

Vinkeluafhængig kvantitativ måling af

blodgennemstrømning

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

Projektet

Valider volumenflow estimeret med vektor ultralyd

mod “ultrasound dilution technique” (UDT)

20 fungerende hæmodialyse fistler skannes med

vektor ultralyd og volumenflow beregnes

I samme session måles volumenflow med UDT

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

Skannes direkte på mest tilgængelige del af fistlen

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

20 fistler blev skannet – en måtte udgå

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

To beregningsmodeller for vektor volumenflow

VFavg = Vavg x A

VFmax = 1/2 x Vmax x A

Tre (individuelle) målinger på hver fistel

Sammenlignes med Transonic (UDT)

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

VFImax estimerede 370,1 ml/min mindre end UDT

VFIavg estimerede 482,3 ml/min mindre end UDT

SD for UDT: 132,9 ml/min

SD for VFImax: 74,6 ml/min

SD for VFI avg: 62,3 ml/min

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

Resultater

Center for Fast Ultrasound Imaging, Department of Electrical Engineering Technical University of Denmark

Tusind tak