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Clinical Neuroradiology
Published in: Clinical Neuroradiology 3/2017

01-09-2017 | Original Article

The Derivo Embolization Device, a Second-Generation Flow Diverter for the Treatment of Intracranial Aneurysms, Evaluated in an Elastase-Induced Aneurysm Model

Authors: D. Ley, R. Mühl-Benninghaus, U. Yilmaz, H. Körner, G. F. M. Cattaneo, W. Mailänder, Y-J. Kim, B. Scheller, W. Reith, A. Simgen

Published in: Clinical Neuroradiology | Issue 3/2017

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Abstract

Purpose

In recent years, flow diverters have provided a promising alternative to treat complex intracranial aneurysms. In this study, we compare a second-generation flow-diverting device (Derivo Embolization Device) with its prototype flow diverter, in the treatment of elastase-induced aneurysms in New Zealand white rabbits.

Methods

The Derivo Embolization Device is a self-expanding stent consisting of 48 nitinol wires. The device was implanted across the necks of 17 elastase-induced aneurysms in New Zealand white rabbits. One additional device was implanted in the abdominal aorta of each animal covering the origin of lumbar arteries. Follow-up was performed after 3 months (n = 8) and 6 months (n = 9) under continuous double antiplatelet therapy. Statuses of angiographic and histological aneurysm occlusion as well as patency of branch arteries and neointimal growth were evaluated and compared with its prototype flow diverter.

Results

The Derivo Embolization Device provided advanced visibility and flexibility, which led to more accurate navigation and placement. Complete aneurysm occlusion rates were noted in 15 cases (88 %), respectively, compared with 5 cases (28 %) with the first-generation device (p = 0.001). Neointimal growth and diameter stenosis were significantly less with the Derivo Embolization Device and declining after 6 months follow-up in the abdominal aorta. Extreme device oversizing led to distal occlusion of the parent vessel in three cases. Covered branch arteries remained patent throughout the entire period of observation.

Conclusions

The Derivo Embolization Device provides excellent occlusion of elastase-induced aneurysms while preserving branch arteries.
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Metadata
Title
The Derivo Embolization Device, a Second-Generation Flow Diverter for the Treatment of Intracranial Aneurysms, Evaluated in an Elastase-Induced Aneurysm Model
Authors
D. Ley
R. Mühl-Benninghaus
U. Yilmaz
H. Körner
G. F. M. Cattaneo
W. Mailänder
Y-J. Kim
B. Scheller
W. Reith
A. Simgen
Publication date
01-09-2017
Publisher
Springer Berlin Heidelberg
Published in
Clinical Neuroradiology / Issue 3/2017
Print ISSN: 1869-1439
Electronic ISSN: 1869-1447
DOI
https://doi.org/10.1007/s00062-015-0493-9

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