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VIATORR CX 的扩张可控吗？

How Controlled is the Expansion of VIATORR CX?

机构信息

Department of Diagnostic and Interventional Radiology and Quantitative Imaging Lab Bonn (QILaB), University Hospital Bonn, Venusberg-Campus 1, 53127, Bonn, Germany.

Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute Aachen, RWTH Aachen University, Pauwelsstraße 20, 52074, Aachen, Germany.

出版信息

Cardiovasc Intervent Radiol. 2023 May;46(5):658-663. doi: 10.1007/s00270-023-03383-4. Epub 2023 Feb 24.

DOI:10.1007/s00270-023-03383-4
PMID:36826490
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10156797/
Abstract

PURPOSE

To investigate and compare the physical properties of the new generation Gore VIATORR-Controlled Expansion Endoprosthesis (VCX) to those of the predecessor VIATORR stent in an in vitro experimental setup.

MATERIALS AND METHODS

A total of 12 stents (8 VCX; 4 VIATORR; GORE, USA) were examined. Radial resistive force (RRF) and chronic outward force (COF) were assessed using a radial force testing machine (RX-650, Machine Solutions Inc., USA). To assess the radial forces of the VCX above 8 mm, balloon expansion was performed between cycles.

RESULTS

All VCX stents show an abrupt decrease in COF at an external diameter of 8.3 mm; RRF decreases likewise at an external diameter of 8.5 mm. The predecessor VIATORR stent without the "controlled expansion" feature shows linear radial force reduction until full expansion at a diameter of 10 mm. The physical properties of the VCX can be altered by balloon modulation. Point of COF (RRF) reduction shifts to 8.5 mm (8.6 mm), 8.6 mm (8.8 mm) and 9.3 mm (9.6 mm) following modulation with a 8 mm, 9 mm and 10 mm balloon.

CONCLUSIONS

The VCX shows an abrupt and disproportionate decrease in COF and RRF at an external diameter of 8.3 mm, thus passive expansion to its nominal diameter of 10 mm is not to be expected. By means of balloon dilatation the physical properties of the stent can be altered, enabling customized TIPS creation. The previous VIATORR stent shows continuous COF and RRF until total expansion.

摘要

目的

在体外实验装置中研究和比较新一代戈尔 VIATORR- 可控扩张支架（VCX）与前代 VIATORR 支架的物理性能。

材料和方法

共检查了 12 个支架（8 个 VCX；4 个 VIATORR；戈尔，美国）。使用径向力试验机（RX-650，Machine Solutions Inc.，美国）评估径向阻力（RRF）和慢性外向力（COF）。为了评估 VCX 在 8mm 以上的径向力，在循环之间进行球囊扩张。

结果

所有 VCX 支架在 8.3mm 外径处表现出 COF 的急剧下降；RRF 同样在外径 8.5mm 处下降。没有“可控扩张”功能的前代 VIATORR 支架在直径为 10mm 时呈线性径向力减小，直至完全扩张。VCX 的物理性能可以通过球囊调节改变。COF（RRF）降低点在球囊调节为 8mm、9mm 和 10mm 时分别移至 8.5mm（8.6mm）、8.6mm（8.8mm）和 9.3mm（9.6mm）。

结论

VCX 在 8.3mm 外径处表现出 COF 和 RRF 的急剧和不成比例的下降，因此不能期望被动扩张到其标称直径 10mm。通过球囊扩张可以改变支架的物理性能，从而能够定制 TIPS 的创建。以前的 VIATORR 支架在外径完全扩张之前表现出连续的 COF 和 RRF。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/3a235a6cd87c/270_2023_3383_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/0d9f12c01e86/270_2023_3383_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/8f0bfe38a5a6/270_2023_3383_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/5e92287b46fd/270_2023_3383_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/42970a0cf239/270_2023_3383_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/a0d179aa5a1b/270_2023_3383_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/3a235a6cd87c/270_2023_3383_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/0d9f12c01e86/270_2023_3383_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/8f0bfe38a5a6/270_2023_3383_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/5e92287b46fd/270_2023_3383_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/42970a0cf239/270_2023_3383_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/a0d179aa5a1b/270_2023_3383_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/64ce/10156797/3a235a6cd87c/270_2023_3383_Fig6_HTML.jpg

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