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Flow-diverter

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https://www.readbyqxmd.com/read/28994804/biodegradable-magnesium-stent-treatment-of-saccular-aneurysms-in-a-rat-model-introduction-of-the-surgical-technique
#1
Edin Nevzati, Jeannine Rey, Daniel Coluccia, Donato D'Alonzo, Basil Grüter, Luca Remonda, Javier Fandino, Serge Marbacher
The steady progess in the armamentarium of techniques available for endovascular treatment of intracranial aneurysms requires affordable and reproducable experimental animal models to test novel embolization materials such as stents and flow diverters. The aim of the present project was to design a safe, fast, and standardized surgical technique for stent assisted embolization of saccular aneurysms in a rat animal model. Saccular aneurysms were created from an arterial graft from the descending aorta.The aneurysms were microsurgically transplanted through end-to-side anastomosis to the infrarenal abdominal aorta of a syngenic male Wistar rat weighing >500 g...
October 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28992722/the-treatment-of-pseudoaneurysms-with-flow-diverters-after-malignant-otitis-externa
#2
Tamás Németh, László Szakács, Zsolt Bella, Valéria Majoros, Pál Barzó, Erika Vörös
Background We report a case of bilateral malignant otitis externa complicated with bilateral petrous internal carotid artery pseudoaneurysms and their successful treatment with a flow diverter. Case report A 68-year-old woman with serious complications of type II diabetes mellitus had malignant otitis externa on the right side. She was treated with combined antibiotic therapy and underwent mastoidectomy for mastoiditis. She presented at our hospital with acute hemorrhage from the right external auditory canal...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28987531/numerical-study-and-theoretical-performance-limit-of-interconnected-multi-capillary-gas-chromatography-columns-with-perfectly-ordered-pillar-patterns
#3
Sander Jespers, Frederic Lynen, Gert Desmet
We present the results of a theoretical and numerical study of the chromatographic performance of a novel type of microfabricated GC column. The column consists of an array of rectangular flow diverters (pillars), creating a network of perfectly ordered, interconnected and tortuous flow-through paths. Using van Deemter and kinetic plots of simulated band broadening data, we could demonstrate that the proposed column structure performs as a bundle of parallel open-tubular capillaries with rectangular cross-section, connected by a regular pattern of channel-intermixing points that allow compensating for inevitable channel-to-channel differences in migration velocity without adding any significant dispersion themselves...
September 28, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28982785/treatment-of-middle-cerebral-artery-aneurysms-with-flow-diverter-stents-a-systematic-review-and-meta-analysis
#4
F Cagnazzo, D Mantilla, P-H Lefevre, C Dargazanli, G Gascou, V Costalat
BACKGROUND: The safety and efficacy of flow-diversion treatment of MCA aneurysms have not been well-established. PURPOSE: Our aim was to evaluate angiographic and clinical outcomes after flow diversions for MCA aneurysms. DATA SOURCES: A systematic search of PubMed, MEDLINE, and Embase was performed for studies published from 2008 to May 2017. STUDY SELECTION: According to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we selected studies with >5 patients describing angiographic and clinical outcomes after flow-diversion treatment of MCA aneurysms...
October 5, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28976877/a-case-of-pseudoaneurysm-of-the-internal-carotid-artery-following-endoscopic-endonasal-pituitary-surgery-endovascular-treatment-with-flow-diverting-stent-implantation
#5
Ali Karadag, Burak Kinali, Omer Ugur, Ismail Oran, Erik H Middlebrooks, Mehmet Senoglu
Internal carotid artery (ICA) pseudoaneurysm is a rare complication of endoscopic endonasal surgery occurring in 0.4-1.1% of cases. Pseudoaneurysms can subsequently result in other complications, such as subarachnoid hemorrhage, epistaxis, and caroticocavernous fistula with resultant death or permanent neurologic deficit. In this case, we illustrate endovascular treatment with a flow-diverting stent for an ICA pseudoaneurysm after endoscopic endonasal surgery for a pituitary adenoma in a 56-year-old male. Surgery was complicated by excessive intraoperative bleeding and emergent CT angiography confirmed an iatrogenic pseudoaneurysm on the anteromedial surface of the ICA...
2017: Acta Medica (Hradec Králové)
https://www.readbyqxmd.com/read/28965108/meta-analysis-of-treatment-outcomes-of-posterior-circulation-non-saccular-aneurysms-by-flow-diverters
#6
Satoshi Kiyofuji, Christopher S Graffeo, Avital Perry, Mohammad Hassan Murad, Kelly D Flemming, Giuseppe Lanzino, Leonardo Rangel-Castilla, Waleed Brinjikji
INTRODUCTION: Non-saccular aneurysms of the posterior circulation are uncommon but highly dangerous lesions. Flow diverter stents have been demonstrated to be effective treatments of various anterior circulation aneurysms, particularly large and giant proximal internal carotid artery aneurysms. However, evidence regarding the treatment of non-saccular posterior circulation aneurysms with flow diverters is lacking. METHODS: A systematic literature review of the English language literature since 2007 was conducted using PubMed, MEDLINE, and Embase...
September 30, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28962011/treatment-of-dissecting-distal-vertebral-artery-v4-aneurysms-with-flow-diverters
#7
Jacquelyn A Corley, Ali Zomorodi, L Fernando Gonzalez
BACKGROUND: Dissecting aneurysms of the intracranial vertebral arteries are rare; however, treatment of these presents multiple challenges, including high risk of rebleeding, development of thromboembolic strokes, and progressive partial thrombosis. Flow diverters, such as Pipeline Endovascular Devices (PEDs; Covidien, Medtronic Inc, Dublin, Ireland), have emerged as a potential treatment option. OBJECTIVE: To present our experience with patients treated at our institution with PEDs for dissecting distal vertebral artery (V4 segment) aneurysms...
August 9, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28961750/flow-diverting-stents-for-the-obliteration-of-symptomatic-infectious-cavernous-carotid-artery-aneurysms
#8
Andrew Joshua Kobets, Aleka Scoco, Jonathan Nakhla, Allan Leonard Brook, Merritt Drew Kinon, Nrupen Baxi, David Altschul
BACKGROUND: Intracavernous aneurysms constitute up to 9% of all intracranial aneurysms and 6% are infectious (IIA). First line therapy is a protracted antibiotic course, yet with failure, surgery and endovascular parent vessel sacrifice have been utilized. Reconstructive endovascular therapies have emerged for aneurysm control and may demonstrate a safer therapeutic alternative. OBJECTIVE: To present an IIA treated with a flow-diverting Pipeline stent (ev3 Neurovascular, Irvine, California)...
August 5, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28956513/the-medina-embolic-device-karolinska-experience
#9
P Bhogal, P A Brouwer, L Yeo, M Svensson, M Söderman
Background The aim of this study was to report our single centre experience with the Medina Embolic Device (MED). Methods We performed a retrospective analysis of prospectively collected data to identify all patients treated with the MED. A total of 14 aneurysms (non-consecutive), in 13 patients, were treated including one ruptured and one partially thrombosed aneurysm. Fundus diameter was ≥5 mm in all cases. We evaluated the angiographic appearances, the clinical status, complications, and the need for adjunctive devices or repeat treatments...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28955510/usefulness-of-the-pipeline-embolic-device-for-large-and-giant-carotid-cavernous-aneurysms
#10
Shigeru Miyachi, Ryo Hiramatsu, Hiroyuki Ohnishi, Ryokichi Yagi, Toshihiko Kuroiwa
PURPOSE: Conventional coil embolization for large carotid cavernous aneurysms (CCAs) has limited utility due to its inability to prevent recurrences and reduce mass effect. Trapping of the parent artery may have a risk of ischemic complications due to intracranial perfusion disorders. We successfully treated 24 patients with large CCAs using a flow diverter (Pipeline™ embolic device: PED), and this report discusses the safety and efficacy of this method. MATERIALS AND METHODS: Twenty four patients (23 females, mean age 71...
September 2017: Neurointervention
https://www.readbyqxmd.com/read/28944944/endovascular-treatment-of-intracranial-anterior-circulation-aneurysms-with-flow-diverters-a-single-centre-experience-with-mid-and-long-term-results
#11
Ezel Yaltirik Bilgin, Baran Önal, Hakan Emmez, Koray Akkan, Erhan Ilgit, Erkan Bilgin, Emetullah Cindil, Alp Ozgun Borcek
AIM: We report our experience with flow diverter devices in the treatment of intracranial aneurysms arising from anterior circulation with mid and long-term follow-up. MATERIAL AND METHODS: 78 aneurysms in 61 patients (range 25-81 years, 13 male, 48 female) were treated with flow diverter devices. 40 (51,3%) aneurysms were treated with pipeline embolization device (PED), 24 (30,8%) aneurysms were treated with SILK stent, 12(15,4%) aneurysms were treated with flow redirection endoluminal device (FRED) and two aneurysms were treated with P64 Flow Modulation Device (P64)...
July 11, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28933202/giant-vertebrobasilar-aneurysm-a-rare-cause-of-central-sleep-apnoea
#12
Mark Daniel Haley, Duncan Bruce Henry Henderson, Mark Nowell, William M Adams, Peter C Whitfield
We report a case of central sleep apnoea (CSA) due to a giant vertebrobasilar aneurysm with brainstem compression. A flow diverter stent was deployed with coil embolization of the right vertebral artery distal to the posterior inferior cerebellar artery (PICA) to occlude the aneurysm. The patient's symptoms improved following therapy.
September 21, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28904796/endovascular-management-of-symptomatic-cerebral-aneurysm-thromboembolism-due-to-pre-aneurysmal-arterial-stenosis
#13
Torin Karsonovich, Ajeet Gordhan
BACKGROUND: Pre-aneurysmal internal carotid steno-occlusive disease resulting in cerebral intra-aneurysmal thrombosis and subsequent embolic infarction has not been previously described. CONCLUSION: Antithrombotic treatment for dissolution of the thrombus and pre-aneurysmal stent angioplasty followed by Pipeline embolization flow diverter placement through the aneurysm is a safe and feasible management option.
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28891190/is-multiple-overlapping-uncovered-stents-technique-suitable-for-aortic-aneurysm-repair
#14
Siang Lin Yeow, Hwa Liang Leo
A computational fluid dynamic model to assess the impact of flow-diverter device on intra-aneurysmal flow in complex aortic aneurysm from the viewpoint of hemodynamics is presented. The aim of this study is to investigate the hemodynamic effects of an endovascular flow-diverter technique using multiple overlapping uncovered stents (MOUS) in the treatment of complex aortic aneurysm involving side branch. The placement of porous barrier such as MOUS across the aneurysm alters the blood flow pattern in the aneurysm sac...
September 11, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28887074/paediatric-aneurysms-review-of-endovascular-treatment-strategies
#15
REVIEW
P Bhogal, M Aguilar Pérez, C Wendl, H Bäzner, O Ganslandt, H Henkes
Paediatric aneurysms are rare and represent the end result of a variety of different pathological mechanisms. They have a varied presentation and features that are distinct from their adult counterparts. The appropriate management of these aneurysms requires a multi-disciplinary team approach and detailed analysis to deal with the underlying pathology. This can involve the use of coils, adjunctive devices such as neck-bridging devices, flow diverters and liquid embolic agents, as well as microsurgical clipping...
November 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28875355/is-there-an-association-between-flow-diverter-fish-mouthing-and-delayed-type-hypersensitivity-to-metals-a-case-control-study
#16
Naci Kocer, Prabath Kumar Mondel, Elif Yamac, Ayse Kavak, Osman Kizilkilic, Civan Islak
PURPOSE: Flow diverters are increasingly used in the treatment of complex and giant intracranial aneurysms. However, they are associated with complications like late aneurysmal rupture. Additionally, flow diverters show focal structural decrease in luminal diameter without any intimal hyperplasia. This resembles a "fish mouth" when viewed en face. In this pilot study, we tested the hypothesis of a possible association between flow diverter fish-mouthing and delayed-type hypersensitivity to its metal constituents...
September 5, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28860903/a-novel-flow-diverter-tubridge-for-the-treatment-of-recurrent-aneurysms-a-single-center-experience
#17
Yongxin Zhang, Qing-Hai Huang, Yibin Fang, Pengfei Yang, Yi Xu, Bo Hong, Jianmin Liu
OBJECTIVE: The Tubridge flow diverter (FD) is a novel device aimed at reconstructing the parent artery and occluding complex aneurysms. Retreatment of recurrent aneurysms using the FD is challenging. We report our initial experience in the repair of aneurysm recurrence with the FD. MATERIALS AND METHODS: A database was reviewed prospectively, and 8 patients with 8 recurrent aneurysms (mean size, 16.7 mm) were identified. Four aneurysms had previously ruptured. The previous aneurysm treatment consisted of coiling in 1 aneurysm and single-stent-assisted coiling in 7 aneurysms...
September 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28842742/in-vitro-contrast-agent-based-evaluation-of-the-influence-of-flow-diverter-size-and-position-on-intra-aneurysmal-flow-dynamics-using-syngo-iflow
#18
Giorgio Franco Maria Cattaneo, Andreas Ding, Tobias Jost, Désirée Ley, Ruben Mühl-Bennighaus, Umut Yilmaz, Heiko Körner, Wolfgang Reith, Andreas Simgen
PURPOSE: 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. METHODS: 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)...
August 25, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28839527/a-new-imaging-tool-for-realtime-measurement-of-flow-velocity-in-intracranial-aneurysms
#19
Athanasios K Petridis, Marius Kaschner, Jan F Cornelius, Marcel A Kamp, Angelo Tortora, Hans-Jakob Steiger, Bernd Turowski
With modern imaging modalities of the brain a significant number of unruptured aneurysms are detected. However, not every aneurysm is prone to rupture. Because treatment morbidity is about 10% it is crucial to identify unstable aneurysms for which treatment should be discussed. Recently, new imaging tools allow analysis of flow dynamics and wall stability have become available. It seems that they might provide additional data for better risk profiling. In this study we present a new imaging tool for analysis of flow dynamics, which calculates fluid velocity in an aneurysm (Phillips Electronics, N...
June 7, 2017: Clinics and Practice
https://www.readbyqxmd.com/read/28838114/endovascular-treatment-of-large-and-giant-carotid-aneurysms-with-flow-diverter-stents-alone-or-in-combination-with-coils-a-multicenter-experience-and-long-term-follow-up
#20
Simone Peschillo, Alessandro Caporlingua, Maria Chiara Resta, Jo Peter Paul Peluso, Nicola Burdi, Nader Sourour, Francesco Diana, Giulio Guidetti, Frédéric Clarençon, Gijs Coenraad Bloemsma, Federico Di Maria, Massimo Donatelli, Maurizio Resta
BACKGROUND: Although flow diverters (FDs) have been widely accepted by neurointerventionists, their safety has yet to be fully defined. Stratification by aneurysm size and location is essential for correct evaluation of treatment outcomes and risks of flow diversion. OBJECTIVE: To compare neurological and anatomic outcomes and evaluate the risk of complications after endovascular treatment of large or giant internal carotid artery (ICA) aneurysms with FD/FDs alone or together with coil embolization...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
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