Spiral Laminar Flow: a Survey of a Three-Dimensional Arterial Flow Pattern in a Group of Volunteers

Stonebridge, P. A.; Suttie, Stuart; Ross, Rose; Dick, J. Stavely

doi:10.1016/j.ejvs.2016.07.018

Cited by 19 publications

(18 citation statements)

References 46 publications

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“…Besides the widely investigated WSS, physiological helical flow (HF) has also been hypothesized to have a relevant impact on vascular disease. HF, consisting of a helical-shaped arrangement of the streaming blood (as given by the combination of translational and rotational blood flow motions), is known to markedly characterize arterial hemodynamics [6][7][8][9]. The physiological significance of arterial HF, in https://doi.org/10.1016/j.atherosclerosis.2020.01.027 particular its atheroprotective nature, has emerged in the last decade in the human aorta [6,[10][11][12] and in the human carotid bifurcation [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The impact of helical flow on coronary atherosclerotic plaque development

et al. 2020

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Section: Introductionmentioning

confidence: 99%

The impact of helical flow on coronary atherosclerotic plaque development

et al. 2020

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“…If there were 3 zones (red, blue, and red or blue, red, and blue), they were interpreted as the presence of double vortices or Dean vortices (Figure ). A similar technique of HBF registration was used by Stonebridge et al…”

Section: Methodsmentioning

confidence: 99%

“…If there were 3 zones (red, blue, and red or blue, red, and blue), they were interpreted as the presence of double vortices or Dean vortices ( Figure 3). A similar technique of HBF registration was used by Stonebridge et al 9 For HBF with a single vortex, the quantitative evaluation included measurement of the axial and rotational blood flow velocities, as well as calculation of the summary velocity of motion of the blood particles in helical paths. Velocity characteristics were assessed by spectral Doppler imaging in longitudinal and transverse sections of the artery under study.…”

Section: Methodsmentioning

confidence: 99%

“…4,8 However, magnetic resonance angiography is often not readily available in the clinic, unlike color duplex ultrasound (US), which was also successfully used for quantitative evaluation of HBF parameters in the human carotid and femoral arteries. 7,9 From the clinical perspective, studying the HBF phenomenon in vascular disorders, especially in atherosclerosis, is of great importance. Some investigators believe that the flow swirling can prevent the development of atherosclerosis.…”

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confidence: 99%

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Helical Blood Flow in Hemodynamically Significant Carotid Stenosis

Kirsanov

Kulikov

2019

J of Ultrasound Medicine

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Objectives To define helical blood flow (HBF) characteristics in hemodynamically significant atherosclerotic stenosis of the internal carotid artery (ICA) by means of duplex scanning. Methods Twenty‐five hemodynamically significant (65.0% [range, 63.0%–69.0%]) carotid stenoses were examined in 23 patients. The severity of the stenosis was calculated by the European Carotid Surgery Trial grading method by transverse section scanning in the B‐mode. Rotational components were estimated in color flow mapping by transverse‐section scanning of a vessel at the most narrowed site, as well as in the prestenotic and poststenotic segments. A quantitative evaluation of HBF was performed on the basis of pulsed wave Doppler imaging of longitudinal and transverse sections of the arterial lumen. Results Helical blood flow was most often (68%) registered in the poststenotic segment of the ICA as a single vortex (52%) or double vortices (16%). At the most narrowed site, HBF was registered in 48% of the cases (44% single vortex and 4% double vortices), whereas in the prestenotic segment of the blood vessel, it was registered in only 16% of the cases (8% single vortex and 8% double vortices). The time‐averaged maximum blood flow velocities at the most narrowed site were 88.5 cm/s (25th–75th percentiles, 73.8‐127.8 cm/s) for the axial component and 33.1 cm/s (22.7–40.9 cm/s) for the rotational component. The calculated summary velocity of motion of the blood particles in helical paths was 92.2 cm/s (75.7–144.2 cm/s). Conclusions It has been shown that HBF can be registered by Doppler ultrasound in atherosclerotic stenosis, and its registration rate increases while passing through the narrowed segment of the ICA.

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“…While the physiological importance of secondary motion in circulation has clearly been highlighted in the literature, the benefits of helical/spiral prostheses in vascular conduits have been firmly established [3].According to clinical studies, the swirl number characterized by the ratio of the maximum circumferential to the maximum axial velocity is 0.1-0.3 for the femoral artery [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of swirling flow in the graft with a spiral ridge

Radchenko

Gataulin

Yukhnev

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. In the present work, numerical simulation was conducted for a typical connection of a vascular graft (prosthesis) and an artery to assess the effect of inducing swirling flow, which is believed to remove unfavourable flow environment. A parametric study on the spiral ridge geometrical features that was conducted showed that the ridge height and pitch have significant effects on inducing swirling flow, and revealed the potential of improving the efficiency of such design. Simulations were carried out for two models -a standard graft and the one with an optimal spiral ridge. Hemodynamic parameters were compared and the results showed that the graft with a spiral ridge is more effective. The induced swirling flow was generally found to be decreasing particle residence time within the connection of the graft and artery region and the host artery, which may be beneficial to the graft patency rates.

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Spiral Laminar Flow: a Survey of a Three-Dimensional Arterial Flow Pattern in a Group of Volunteers

Abstract: 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.

Cited by 19 publications

References 46 publications

The impact of helical flow on coronary atherosclerotic plaque development

The impact of helical flow on coronary atherosclerotic plaque development

Helical Blood Flow in Hemodynamically Significant Carotid Stenosis

Numerical investigation of swirling flow in the graft with a spiral ridge

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