Vector doppler imaging and secondary flow patterns in vascular prostheses

E. Kokkalis, P. R. Hoskins, G. A. Corner, P. A. Stonebridge, A. J. Doull, A. Melzer, G. J. Houston

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Flow patterns created by vascular prostheses designed to induce spiral flow, were compared against standard plain grafts using an in-house ultrasound flow phantom. Color Doppler and vector Doppler imaging were applied to visualize and quantify secondary flow motions distally to the grafts outflow. The flow phantom incorporates a piston pump, blood mimic fluid, vessel mimicking tubing consisting of polyvinyl alcohol, in 9% glycerol solution. Spiral Laminar Flow™ Peripheral Vascular (PV) and Access Vascular (AV) grafts (Vascular Flow Technologies, Dundee, UK) were compared with standard control PV and AV grafts. Steady flow rates up to 720 ml min were applied. Color Doppler cine loops were acquired from the left (? = 20) and right (? =-20) projection, with the transducer positioned transverse to the flow direction. The velocity data was subjected to triangulation in order to generate in-plane velocity magnitude and direction maps. Complicated rotational patterns were detected in the connection between the graft and the vessel mimic, with a prevalent single helix for the spiral prostheses and a prevalent double helix for the control devices. A clear single spiral pattern was found distally of the spiral grafts and a double distally of the standard devices. The magnitude of the radial component velocity distally from the PV spiral graft, was found to be significantly higher (p <0.05) compared to the control device. This study compared different vascular graft designs in terms of their outflow patterns, using a dual-beam color Doppler mapping.
    Original languageEnglish
    Title of host publicationUltrasonics Symposium (IUS), 2012 IEEE International
    PublisherIEEE
    Number of pages4
    ISBN (Print)9781467345613
    DOIs
    Publication statusPublished - 2012
    Event2012 IEEE International Ultrasonics Symposium (IUS) - Dresden, Germany
    Duration: 7 Oct 201210 Oct 2012
    http://ius2012.ifw-dresden.de/

    Conference

    Conference2012 IEEE International Ultrasonics Symposium (IUS)
    Abbreviated title2012 IEEE IUS
    CountryGermany
    CityDresden
    Period7/10/1210/10/12
    Internet address

    Fingerprint Dive into the research topics of 'Vector doppler imaging and secondary flow patterns in vascular prostheses'. Together they form a unique fingerprint.

    Cite this