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Spontaneous Dilatation of Carotid Artery Stents Three Months after the Procedure, without the Need for Post-CAS Balloon Dilatation Yuhei TANNO 1 , Takahisa MORI 1 , Tomonori IWATA 1 , Yoshinori AOYAGI 1 , Shigen Kasakura 1 , Kazuhiro YOSHIOKA 1 1Department of Stroke Treatment, Shonan Kamakura General Hospital Keyword: carotid artery stenting , stent diameter pp.1019-1025
Published Date 2015/11/10
DOI https://doi.org/10.11477/mf.1436203171
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 Objective:The aim of this retrospective study was to investigate whether the radial force of a self-expandable stent alone is sufficient to dilate an atherosclerotic carotid artery without the need for post-carotid artery stenting(CAS)balloon dilatation(PCasBD).

 Methods:We included in our analysis patients who had undergone(1)elective CAS without PCasBD from January 2012 to March 2014, and(2)follow-up conventional angiography 3 months after CAS. We recorded the patients' baseline characteristics and stent types(open-cell[OP]or closed-cell[CL]). Using the minimum width on the lateral projection, stent diameters(SDs)were measured at the site both post-operatively and 3 months after CAS.

 Results:Fifty-eight lesions in 55 patients were analyzed. The average age of the patients was 74.4 years;the median SD immediately after CAS was 3.27 mm(interquartile range:3.09-3.64 mm), while after 3 months it was 3.97mm(3.58-4.25mm), a significant increase(p<0.0001). In Regarding OP stents specifically(n=18), the median SD increased from 3.59 to 4.05 mm, while the median diameter of CL stents(n=44)increased from 3.22 to 3.83 mm. The median diameter of OP stents was larger than that of CL stents at both time points(p<0.05), whereas the expansion rate of CL stents was higher.

 Conclusion:All stents had spontaneously dilated by 10% to 20% without PCasBD. The diameter of OP stents was larger than that of CL stents, both immediately and 3 months after CAS.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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