Spiral laminar flow: a survey of a three-dimensional arterial flow pattern in a group of volunteers

P. A. Stonebridge, S. A. Suttie (Lead / Corresponding author), R. Ross, J. Dick

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    OBJECTIVE: Spiral laminar flow was suggested as potentially the predominant arterial blood flow pattern many years ago. Computational fluid dynamics and flow rig testing have suggested there are advantages to spiral laminar flow. The aim of this study was to identify whether spiral laminar is the predominant flow pattern in a cohort of volunteers.

    METHODS: This study included 42 volunteers (mean age 66.8 years). Eleven arterial sites were examined, comprising bilateral examination of the common carotid artery, internal carotid artery, external carotid artery, common femoral artery, superficial femoral artery, and the infra renal aorta. The presence or absence of spiral laminar flow, the peak systolic velocity, and the rotational velocity were assessed by colour Duplex scanning.

    RESULTS: The incidence of spiral laminar flow ranged from 81% in the internal carotid artery to 90% in the common carotid artery and the infra renal aorta. Overall, in 58% of all right-sided arteries the rotation was clockwise and 42% anticlockwise. In all left-sided arteries these numbers were reversed. Analysis on the basis of volunteer rather than examination site showed that 41/42 (97%) had more sites with spiral laminar flow than without. Only one volunteer had more sites exhibiting non-spiral laminar flow.

    CONCLUSION: Spiral laminar flow was the predominant flow pattern in the study population. This observation raises questions and suggests a need for further studies concerning the form and function of the left ventricle, the geometry of the arterial system, and the function of the arterial wall.

    Original languageEnglish
    Pages (from-to)674-680
    Number of pages7
    JournalEuropean Journal of Vascular and Endovascular Surgery
    Volume52
    Issue number5
    Early online date26 Aug 2016
    DOIs
    Publication statusPublished - Nov 2016

    Keywords

    • Spiral laminar flow
    • Arterial flow

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