Details

Autor(en) / Beteiligte

• Simgen, Andreas
• Ley, Désirée
• Roth, Christian
• Cattaneo, Giorgio Franco Maria
• Mühl-Benninghaus, Ruben
• Müller, Andreas
• Körner, Heiko
• Kim, Yoo-Jin
• Scheller, Bruno
• Reith, Wolfgang
• Yilmaz, Umut

Titel

Evaluation of occurring complications after flow diverter treatment of elastase-induced aneurysm in rabbits using micro-CT and MRI at 9.4 T

Ist Teil von

• Neuroradiology, 2016-10, Vol.58 (10), p.987-996

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2016

Quelle

SpringerLink

Beschreibungen/Notizen

• Introduction Flow diverters are increasingly being used to treat intracranial aneurysms. This study evaluates occurring complications of flow-diverting devices in the treatment of experimental aneurysms, involving the use of micro-CT and small animal MRI at 9.4 T, in correlation to angiographic and histological findings. Methods We previously published two preclinical studies, in which we assessed two different flow diverters in the treatment of elastase-induced aneurysms. Devices have been implanted across the aneurysm neck as well as in the abdominal aorta. From these studies, a total of 65 devices (prototype FD ( n  = 30) and Derivo embolization device ( n  = 35)) additionally underwent micro-CT and MRI after angiographic follow-up and before being histologically examined. Results The different architectures of both devices were precisely comparable due to high-resolution micro-CT imaging. Micro-CT revealed wire fractures in nine cases (30 %) only with the prototype FD. In three cases (10 %), severe wire fractures correlated with an in-stent stenosis due to intimal hyperplasia. Other complications, like distal stent occlusions and post-stent stenosis, were seen in both groups and verified with both imaging techniques. Osseous metaplasia were correlated to calcifications seen with micro-CT. MRI enabled visualization of the position of the implanted devices relative to the aneurysm and revealed incomplete aneurysm neck coverage with the prototype FD in two cases (6.7 %). Conclusion Micro-CT and 9.4-T MRI are valid to discover and understand occurring complications of flow diverters in the preclinical phase and can serve as evaluation tools to minimize complication rates of endovascular devices in the future.