SECONDARY FLOW IN PERIPHERAL VASCULAR PROSTHETIC GRAFTS USING VECTOR DOPPLER IMAGING

Efstratios Kokkalis*, Peter R. Hoskins, George A. Corner, Peter A. Stonebridge, Anthony J. Doull, J. Graeme Houston

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Prosthetic grafts are used for the treatment of peripheral arterial disease. Re-stenosis in the distal anastomosis of these grafts is a common reason for graft occlusion. The role of local hemodynamics in development of neo-intimal hyperplasia is well known. A new graft design has been proposed for the induction of optimized spiral flow in the host vessel. The secondary flow motions induced by this graft were compared with those of a control device. Both types of grafts were connected with vessel mimic and positioned in ultrasound flow phantoms with identical geometry. Constant flow rates were applied. Data collected in the cross-sectional view distal from the graft outflow and dual-beam vector Doppler was applied to create 2-D velocity maps. A single-spiral flow pattern was found for the flow-modified graft, and double or triple spirals for the control graft. In-plane maximum velocity was greater for the flow-modified graft than for the control device. (E-mail: E. Kokkalis@dundee.ac.uk) (C) 2013 World Federation for Ultrasound in Medicine & Biology.

Original languageEnglish
Pages (from-to)2295-2307
Number of pages13
JournalUltrasound in Medicine and Biology (UMB)
Volume39
Issue number12
DOIs
Publication statusPublished - Dec 2013

Keywords

  • Doppler ultrasound
  • Vector Doppler
  • Flow phantom
  • Vascular prosthetic grafts
  • Secondary flow
  • Spiral flow
  • Velocity
  • SPIRAL LAMINAR-FLOW
  • HELICAL FLOW
  • BLOOD-FLOW
  • VELOCITY ESTIMATION
  • VULNERABLE PLAQUES
  • SHEAR-STRESS
  • IN-VIVO
  • ARTERIES
  • MODEL
  • ANASTOMOSIS

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