In vitro, contrast agent-based evaluation of the influence of flow diverter size and position on intra-aneurysmal flow dynamics using syngo iFlow
| Autor: | Andreas Ding, Ruben Mühl-Bennighaus, Andreas Simgen, Heiko Körner, Désirée Ley, Giorgio Cattaneo, Wolfgang Reith, Umut Yilmaz, Tobias Jost |
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| Rok vydání: | 2017 |
| Předmět: |
Models
Anatomic medicine.medical_specialty media_common.quotation_subject Flow (psychology) Contrast Media In Vitro Techniques 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Aneurysm Position (vector) Image Processing Computer-Assisted medicine Contrast (vision) Radiology Nuclear Medicine and imaging cardiovascular diseases Lead (electronics) media_common business.industry Models Cardiovascular Angiography Digital Subtraction Washout Intracranial Aneurysm Equipment Design medicine.disease Intensity (physics) Surgery Contrast medium Cerebrovascular Circulation cardiovascular system Stents Neurology (clinical) Cardiology and Cardiovascular Medicine business Blood Flow Velocity Software 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Neuroradiology. 59:1275-1283 |
| ISSN: | 1432-1920 0028-3940 |
| Popis: | Treatment of intracranial aneurysm with flow-diverting devices has become widespread in recent years. Despite that, intra-aneurysmal flow changes are yet not fully understood and can lead to different complications. Our aim was an in vitro contrast-based evaluation of the influence of flow diverter size and position on intra-aneurysmal flow dynamics. Flow-diverting devices with different sizes (diameters 4.0, 4.5, and 6.0 mm) were deployed in seven silicone aneurysm models at different positions relative to the aneurysm neck (proximal, central, distal). Using syngo iFlow, we defined quantitative evaluation criteria based on contrast medium intensity and performed a flow evaluation. Intra-aneurysmal flows were heavily dependent on both size and position of flow-diverting devices at the aneurysm neck. We observed a higher peak intensity delay and intra-aneurysmal washout delay with the centrally placed 4.0- and 4.5-mm device, respectively, compared to the proximal and distal positions. Especially distally placed 4.0-mm devices led to an earlier filling of the aneurysm and increased intra-aneurysmal contrast agent intensity compared to the parent vessel, due to a potential endoleak. Not only size but also position of flow-diverting devices have a considerable impact on the intra-aneurysmal flow dynamics. The suggested evaluation criteria allowed a quantitative comparison of flow-diverting effect using syngo iFlow and could represent an efficient tool for predicting flow diversion pre-procedurally. |
| Databáze: | OpenAIRE |
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