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脑动脉瘤栓塞术支撑支架物理特性的比较

Comparison of the Physical Characteristics of Support Stents for Cerebral Aneurysm Embolization.

作者信息

Iwakami Takayuki, Fujii Norio, Son Jaehyun

机构信息

Department of Neurosurgery, Tomishiro Central Hospital, Tomigusuku, Okinawa, Japan.

出版信息

J Neuroendovasc Ther. 2021;15(12):778-786. doi: 10.5797/jnet.oa.2020-0167. Epub 2021 Mar 27.

DOI:10.5797/jnet.oa.2020-0167
PMID:37501998
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10370937/
Abstract

OBJECTIVE

There is a limited understanding of the characteristics of individual intracranial stents used for aneurysm treatment. We used an experimental model to evaluate the physical characteristics of support stents for aneurysm embolization.

METHODS

Enterprise 2 VRD 4.0 × 39 mm, Neuroform Atlas 4.5 × 21 mm, and LVIS 4.5 × 32 mm stents were: 1) observed under light microscopy and subjected to measurements of 2) circumferential radial force, 3) strut tension, 4) stent compression, and 5) conformability upon bending.

RESULTS

  1. Light microscopy showed a large structural difference between laser-cut (Enterprise 2 VRD, Neuroform Atlas) and braided (LVIS) stents. 2) Within the range of indicated blood vessel diameters, the radial force of Enterprise 2 VRD was higher than that of Neuroform Atlas. An extremely large force was required to decrease the LVIS diameter. 3) Neuroform Atlas easily deformed compared to Enterprise 2 VRD, while LVIS was extended with a smaller traction force than that required for Neuroform Atlas. 4) The compression strength was in the order of Enterprise 2 VRD >Neuroform Atlas >LVIS. 5) Enterprise 2 VRD showed a decreased cell area on the concave side, and Neuroform Atlas showed deformation with overlapping struts on the concave side. LVIS naturally adhered to the wall of the blood vessel model.

CONCLUSION

Laser-cut and braided stents showed different physical characteristics that were visualized and shown as numerical data. These findings improve the understanding of the proper use of these stents in clinical applications.

摘要

目的

目前对于用于动脉瘤治疗的单个颅内支架的特性了解有限。我们使用实验模型来评估用于动脉瘤栓塞的支撑支架的物理特性。

方法

对Enterprise 2 VRD 4.0×39 mm、Neuroform Atlas 4.5×21 mm和LVIS 4.5×32 mm支架进行以下操作：1）在光学显微镜下观察，并进行2）周向径向力、3）支柱张力、4）支架压缩和5）弯曲顺应性的测量。

结果

1）光学显微镜显示激光切割（Enterprise 2 VRD、Neuroform Atlas）和编织（LVIS）支架之间存在很大的结构差异。2）在指定血管直径范围内，Enterprise 2 VRD的径向力高于Neuroform Atlas。减小LVIS直径需要极大的力。3）与Enterprise 2 VRD相比，Neuroform Atlas更容易变形，而LVIS以比Neuroform Atlas所需更小的牵引力伸展。4）压缩强度顺序为Enterprise 2 VRD>Neuroform Atlas>LVIS。5）Enterprise 2 VRD在凹侧的细胞面积减小，Neuroform Atlas在凹侧出现支柱重叠变形。LVIS自然附着在血管模型壁上。

结论

激光切割和编织支架显示出不同的物理特性，这些特性通过可视化并以数值数据呈现。这些发现有助于提高对这些支架在临床应用中正确使用的理解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/1de9db272906/jnet-15-778-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/7786fa205a8b/jnet-15-778-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/8941f85040d2/jnet-15-778-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/fd25a98b4358/jnet-15-778-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/5edf79ae57d8/jnet-15-778-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/1de9db272906/jnet-15-778-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/7786fa205a8b/jnet-15-778-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/4d47234cee72/jnet-15-778-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/001c9a7172f5/jnet-15-778-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf88/10370937/fd25a98b4358/jnet-15-778-g008.jpg
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