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TECHNICAL PAPERS

Computational Fluid Dynamics of a Vascular Access Case for Hemodialysis

[+] Author and Article Information
Bogdan Ene-Iordache, Lidia Mosconi, Andrea Remuzzi

Clinical Research Center for Rare Diseases Aldo e Cele Daccò, Mario Negri Institute for Pharmacological Research, Villa Camozzi, Ranica (BG), Italy

Giuseppe Remuzzi

Clinical Research Center for Rare Diseases Aldo e Cele Daccò, Mario Negri Institute for Pharmacological Research, Villa Camozzi, Ranica (BG), ItalyNephrology and Dialysis Unit, Azienda Ospedaliera Ospedali Riuniti di Bergamo, Bergamo, Italy

J Biomech Eng 123(3), 284-292 (Dec 13, 2000) (9 pages) doi:10.1115/1.1372702 History: Received November 30, 1999; Revised December 13, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic drawing of the end-to-end arteriovenous fistula (AVF) created as a shunt between the radial artery and the cephalic vein
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DSA images (orthogonal views) used for the three-dimensional reconstruction of the AVF
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Scheme of the back-projection method. Volume of reconstruction (401×401×701 voxels) is symmetrically displaced around the center of rotation (O) of the C-arm of the angiograph.
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Cross-sectional plane of the volume of reconstruction; ellipses represent the assumed vessel lumen profile
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Three-dimensional meshwork used for finite element analysis. Elements are 8-node isoparametric brick type with trilinear velocities and discontinuous constant pressure; number of nodes is 38,482; the cross section is divided into 127 quadrilateral elements and has two boundary layers.
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Centerline velocity measured with CDU in the radial artery of the fistula. Pulse frequency was 68 beats/min; radial artery diameter was 5.8 mm; calculated mean flow rate was 11.9 ml/s. Maximum and minimum flow occur at period fraction t/T=0.32 and t/T=0.90.
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Velocity vector plot at t/T=0.32 (maximum flow rate) in a plane that cuts the bending and anastomosis zones of the AVF
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Axial velocity vector plots in four planes that cut the AVF longitudinally at positions A,B,C, and D
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Secondary velocity vector plots at four cross sections (A,B,C,D) of the AVF
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Path plot of virtual massless particles moving near the wall on the ascending side of the fistula immediately after the arteriovenous anastomosis
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Three-dimensional representation of axial velocity on the arterial side (A,B), near the anastomosis (C) and on the venous side (D) of the AVF at maximum flow rate; see Fig. 9 for the positions of vessel cross sections
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Wall shear stress at the four cross sections of the AVF indicated in Fig. 9; see Fig. 9 for the positions of dimensionless perimeter

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