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Effects of helical centerline stent vs. straight stent placement on blood flow velocity

As an approach to maintain patency in femoropopliteal stenting, a helical stent configuration was proposed, which showed improved patency in clinical trials. However, the effects of helical stent placement on the flow have not been quantitatively analyzed. The purpose of this study was to estimate f...

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Autores principales: Kohata, Yutaro, Ohta, Makoto, Jin, Kazuyoshi, Anzai, Hitomi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10272720/
https://www.ncbi.nlm.nih.gov/pubmed/37333882
http://dx.doi.org/10.3389/fmedt.2023.1196125
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author Kohata, Yutaro
Ohta, Makoto
Jin, Kazuyoshi
Anzai, Hitomi
author_facet Kohata, Yutaro
Ohta, Makoto
Jin, Kazuyoshi
Anzai, Hitomi
author_sort Kohata, Yutaro
collection PubMed
description As an approach to maintain patency in femoropopliteal stenting, a helical stent configuration was proposed, which showed improved patency in clinical trials. However, the effects of helical stent placement on the flow have not been quantitatively analyzed. The purpose of this study was to estimate flow velocities to quantify the influence of helical stent placement. Helical and straight stents were implanted in three healthy pigs, and the flow velocities were estimated using the time-intensity curve (TIC) in the angiography images. The angiographic images indicated thinning of the leading edge of the contrast medium through the helically deformed artery, which was not observed in the straight stent. The slower rise of the TIC peak in the helical stent indicated faster travel of this thinner edge. Arterial expansion due to stenting was observed in all cases, and the expansion rate varied according to location. All cases of helical stent implantation showed that velocity was maintained (55.0%–71.3% velocity retention), unlike for straight stent implantation (43.0%–68.0% velocity retention); however, no significant difference was observed.
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spelling pubmed-102727202023-06-17 Effects of helical centerline stent vs. straight stent placement on blood flow velocity Kohata, Yutaro Ohta, Makoto Jin, Kazuyoshi Anzai, Hitomi Front Med Technol Medical Technology As an approach to maintain patency in femoropopliteal stenting, a helical stent configuration was proposed, which showed improved patency in clinical trials. However, the effects of helical stent placement on the flow have not been quantitatively analyzed. The purpose of this study was to estimate flow velocities to quantify the influence of helical stent placement. Helical and straight stents were implanted in three healthy pigs, and the flow velocities were estimated using the time-intensity curve (TIC) in the angiography images. The angiographic images indicated thinning of the leading edge of the contrast medium through the helically deformed artery, which was not observed in the straight stent. The slower rise of the TIC peak in the helical stent indicated faster travel of this thinner edge. Arterial expansion due to stenting was observed in all cases, and the expansion rate varied according to location. All cases of helical stent implantation showed that velocity was maintained (55.0%–71.3% velocity retention), unlike for straight stent implantation (43.0%–68.0% velocity retention); however, no significant difference was observed. Frontiers Media S.A. 2023-06-02 /pmc/articles/PMC10272720/ /pubmed/37333882 http://dx.doi.org/10.3389/fmedt.2023.1196125 Text en © 2023 Kohata, Ohta, Jin and Anzai. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (https://creativecommons.org/licenses/by/4.0/) . The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Medical Technology
Kohata, Yutaro
Ohta, Makoto
Jin, Kazuyoshi
Anzai, Hitomi
Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title_full Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title_fullStr Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title_full_unstemmed Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title_short Effects of helical centerline stent vs. straight stent placement on blood flow velocity
title_sort effects of helical centerline stent vs. straight stent placement on blood flow velocity
topic Medical Technology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10272720/
https://www.ncbi.nlm.nih.gov/pubmed/37333882
http://dx.doi.org/10.3389/fmedt.2023.1196125
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