A braided stent becomes flattened inside a curved catheter tube: A micro-CT imaging study

Shigematsu, Taiki; Otani, Tomohiro; Tomotake, Shotaro et al.

Bio-Medical Materials and Engineering, 2020, 31(6), 373-380

Number of Access:725（2025-08-28 22:45 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/88323

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Title
A braided stent becomes flattened inside a curved catheter tube: A micro-CT imaging study
Creator
NRID
1000050775765 1000050775765
researchmap permalink
shigematsu_1990 shigematsu_1990
Scopus Author ID
56195177700 56195177700
CreatorName
Shigematsu, Taiki
NRID
1000040778990 1000040778990
ORCID
0000-0002-6431-2703 0000-0002-6431-2703
researchmap permalink
bigvalley bigvalley
Scopus Author ID
55625962900 55625962900
CreatorName
Otani, Tomohiro
CreatorName
Tomotake, Shotaro
CreatorName
Shiozaki, Shunya
NRID
1000070240546 1000070240546
researchmap permalink
shigeo41010 shigeo41010
Scopus Author ID
7401983636 7401983636
CreatorName
Wada, Shigeo
Subject
Braided stent
stent flattening
micro-computed tomography (CT)
endovascular treatment
cerebral aneurysm
Description
The definitive, peer reviewed and edited version of this article is published in Bio-Medical Materials and Engineering, vol. 31, no. 6, pp. 373-380, 2020, https://doi.org/10.3233/BME-206011.
Abstract
BACKGROUND: The braided stent is a widely accepted endovascular treatment device consisting of woven metal wires. One of the unsolved issues for the braided stent is the stent flattening phenomena when deployed into highly curved arteries. Although a recent computational study highlighted that the mechanical state of the stent inside the catheter before the deployment plays an essential role in causing stent flattening, there is no experimental observation for the stent inside the curved catheter. OBJECTIVE: We investigated braided stent shapes in curved catheter tubes with various curvatures by micro-computed tomography (CT). METHODS: A braided stent was deployed into catheter tubes and set in rectangular cases with constant curvature. The three-dimensional shape of the stent was imaged by micro-CT, and its cross-sectional flatness was quantitatively assessed. RESULTS: Stent flattening occurred in cases of high curvatures of the outer side of the tube curvature, and the degree of flatness increased with increasing tube curvature. This demonstrates that stent flattening can be caused inside the highly curved catheter before deployment. CONCLUSIONS: This preliminary and first observational report provides new insight into the mechanism of stent flattening and emphasizes the importance of the geometrical and mechanical state of the stent inside the catheter.
Publisher
IOS Press
Source Title
Bio-Medical Materials and Engineering
Volume (Issue)
31(6)
Page
373-380
Date of Issued
2020-12-11
Language
English
Handle URL
https://hdl.handle.net/11094/88323
PISSN
09592989
eISSN
18783619
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.3233/BME-206011
Relation.isIdenticalTo
PMID
33252062
Access Rights
open access
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article