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https://www.readbyqxmd.com/read/28710082/accuracy-and-precision-of-venous-pressure-measurements-of-endovascular-microcatheters-in-the-setting-of-dural-venous-sinus-stenosis
#1
Michael B Avery, Sheryl Sambrano, Javed Khader Eliyas, Muneer Eesa, Alim P Mitha
INTRODUCTION: Dural venous sinus stenosis (DVSS) may lead to increased intracranial pressure, sometimes requiring a stent if a high pressure gradient exists. Many neuroendovascular physicians use microcatheters to measure gradients, yet there are no studies comparing the accuracies and precisions of modern day microcatheters. We examined pressure recordings from five commonly used microcatheters in an experimental DVSS model. METHODS: Using a programmable pump, dynamic flow was established in a closed circuit mimicking the venous sinus waveform...
July 14, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28706116/training-standards-in-neuroendovascular-surgery-program-accreditation-and-practitioner-certification
#2
REVIEW
Arthur L Day, Adnan H Siddiqui, Philip M Meyers, Tudor G Jovin, Colin P Derdeyn, Brian L Hoh, Howard Riina, Italo Linfante, Osama Zaidat, Aquilla Turk, Jay U Howington, J Mocco, Andrew J Ringer, Erol Veznedaroglu, Alexander A Khalessi, Elad I Levy, Henry Woo, Robert Harbaugh, Steven Giannotta
BACKGROUND AND PURPOSE: Neuroendovascular surgery is a medical subspecialty that uses minimally invasive catheter-based technology and radiological imaging to diagnose and treat diseases of the central nervous system, head, neck, spine, and their vasculature. To perform these procedures, the practitioner needs an extensive knowledge of the anatomy of the nervous system, vasculature, and pathological conditions that affect their physiology. A working knowledge of radiation biology and safety is essential...
July 13, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28689397/invention-of-the-guide-catheter-irrigation-monitoring-device-for-neuroendovascular-therapy
#3
Ayca Ozkul, Jong-Hyun Park, Dong-Seung Shin, Ali Yilmaz, Bum-Tae Kim
OBJECTIVE: The thromboembolic events during neuroendovascular therapy (NET) are the major complications of concern that can be occasionally fatal. The thrombotic occlusion of the guide catheter for NET is thought to be the risk of the thromboembolic events. We have developed an idea for inventing the monitoring system of the continuous irrigation through the guide catheter. We herein present a unique invention of the guide catheter irrigation monitoring device. METHODS: We have developed ideas for preventing the thrombotic occlusion of the guide catheter...
July 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28679854/acute-occlusions-of-dual-layer-carotid-stents-after-endovascular-emergency-treatment-of-tandem-lesions
#4
Umut Yilmaz, Heiko Körner, Ruben Mühl-Benninghaus, Andreas Simgen, Catherine Kraus, Silke Walter, Stefanie Behnke, Klaus Faßbender, Wolfgang Reith, Marcus M Unger
BACKGROUND AND PURPOSE: A new generation of carotid artery stents that uses a second micromesh layer to reduce embolic events during carotid artery stenting has recently been introduced. The purpose of this study was to compare acute occlusion rates of these new dual-layer stents with those of single-layer stents in the setting of emergency carotid artery stenting with intracranial mechanical thrombectomy in acute ischemic stroke. METHODS: Consecutive patients with acute tandem (intra- and extracranial) lesions of the anterior circulation who were endovascularly treated at our institution were identified from our registry of neuroendovascular interventions...
July 5, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28675348/navien-catheter-experience-in-neuroendovascular-interventions
#5
Gaurav Jindal, Luciano Giacon, Moronke Iyoha, Timothy Miller, Francois Aldrich, Marc Simard, Ravishankar Shivashankar, Dheeraj Gandhi
Purpose Advancements in catheter technology have allowed for greater flexibility and trackability. We report 265 consecutive, single-center neurointerventional cases using the Navien guide catheter. Materials and methods Retrospective analysis was performed of consecutive intracranial endovascular procedures utilizing the Navien catheter. Data collected included procedure type, catheters, guide catheter position, cervical access artery tortuosity grade and complications. Results The 5 French catheter was used in 130 cases...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28669268/introduction-to-the-supratentorial-cerebral-arteriovenous-malformation-video-supplement
#6
Robert M Starke, Felipe C Albuquerque, Michael T Lawton
It is with great pleasure that we present this Neurosurgical Focus video supplement on supratentorial cerebral arteriovenous malformations (AVMs). We were privileged to view a remarkable number of outstanding videos demonstrating current state-of-the-art management of brain AVMs using endovascular and microsurgical modalities. Careful and critical review was required to narrow down the submitted videos to a workable volume for this supplement, which reflects the excellent work being done at multiple centers with these lesions...
July 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28655208/accuracy-in-identifying-the-source-of-subarachnoid-hemorrhage-in-the-setting-of-multiple-intracranial-aneurysms
#7
Jennifer L Orning, Sophia F Shakur, Ali Alaraj, Mandana Behbahani, Fady T Charbel, Victor A Aletich, Sepideh Amin-Hanjani
BACKGROUND: Subarachnoid hemorrhage cases with multiple cerebral aneurysms frequently demonstrate a hemorrhage pattern that does not definitively delineate the source aneurysm. In these cases, rupture site is ascertained from angiographic features of the aneurysm such as size, morphology, and location. OBJECTIVE: To examine the frequency with which such features lead to misidentification of the ruptured aneurysm. METHODS: : Records of patients who underwent surgical clipping of a ruptured aneurysm at our institution between 2004 and 2014 and had multiple aneurysms were retrospectively reviewed...
June 26, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28646445/update-on-neurocritical-care-of-stroke
#8
Jason Siegel, Michael A Pizzi, J Brent Peel, David Alejos, Nnenne Mbabuike, Benjamin L Brown, David Hodge, W David Freeman
PURPOSE OF REVIEW: This review will highlight the recent advancements in acute ischemic stroke diagnosis and treatment, with special attention to new features and recommendations of stroke care in the neurocritical care unit. RECENT FINDINGS: New studies suggest that pre-hospital treatment of stroke with mobile stroke units and telestroke technology may lead to earlier stroke therapy with intravenous tissue plasminogen activator (tPA), and recent studies show tPA can be given in previously contraindicated situations...
August 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28619972/staged-curative-treatment-of-a-complex-direct-carotid-cavernous-fistula-with-a-large-arterial-defect-and-an-oversized-internal-carotid-artery
#9
Matthew T Bender, Li-Mei Lin, Alexander L Coon, Geoffrey P Colby
This is a case of a high-flow, post-traumatic direct carotid-cavernous fistula with a widened arterial defect and a large-diameter internal carotid artery (ICA). The unique aspect of this case is the oversized ICA, >8mm in diameter, which is both a pathological and a therapeutic challenge, given the lack of available neuroendovascular devices for full vessel reconstruction. We present a planned two-stage embolisation paradigm for definitive treatment. Transarterial coil embolisation is performed as the first stage to disconnect the fistula and normalise flow in the ICA...
June 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28602632/brachial-ankle-pulse-wave-velocity-as-a-predictor-of-silent-cerebral-embolism-after-carotid-artery-stenting
#10
Tomoaki Murakami, Hajime Nakamura, Takeo Nishida, Tomohiko Ozaki, Katsunori Asai, Tomoki Kidani, Yoshinori Kadono, Manabu Sakaguchi, Toshiki Yoshimine, Haruhiko Kishima
BACKGROUND: In neuroendovascular therapy, the effect of arterial stiffness on postprocedural cerebral thromboembolism is unknown. In this observational study, we examined the relationship between cerebral thromboembolism after carotid artery stenting and arterial stiffness. METHODS: From April 2015 to February 2017, we enrolled consecutive patients undergoing scheduled carotid artery stenting in our institution. In all patients, preprocedural brachial-ankle pulse wave velocity was used to assess arterial stiffness, whereas the number of new cerebral ischemic lesions on diffusion-weighted magnetic resonance imaging was assessed after treatment...
June 8, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28578114/inside-vietnam-s-largest-neurosurgery-department
#11
Constantine L Karras, Huy Minh Tran, David Dornbos, Phong Nguyen, Shahid M Nimjee, Daniel M Prevedello, Ciarán J Powers
Cho Ray Hospital is the premier tertiary care center in Ho Chi Minh City, Vietnam's most populous city. The neurosurgical department was founded in 1958 and is currently one of the busiest in the world. Last year the department was responsible for over 10,000 neurosurgical operations, excluding neuroendovascular cases. Most of the elective cases are craniotomies for complex lesions such as aneurysms, AMV's, skull base tumors, gliomas and meningiomas. While the neurosurgeons within the department are technically gifted, doing more with less predominates as the mantra at Cho Ray Hospital...
May 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28565987/prolapse-of-the-pipeline-embolization-device-in-aneurysms-incidence-management-and-outcomes
#12
Visish M Srinivasan, Andrew P Carlson, Maxim Mokin, Jacob Cherian, Stephen R Chen, Ajit Puri, Peter Kan
OBJECTIVE The Pipeline embolization device (PED) is frequently used in the treatment of anterior circulation aneurysms, especially around the carotid siphon, with generally excellent results. However, the PED has its own unique technical challenges, including the occurrence of device foreshortening or migration leading to prolapse into the aneurysm. The authors sought to determine the incidence of this phenomenon, the rescue strategies, and outcomes. METHODS Four institutional databases of neuroendovascular procedures were reviewed for cases of intracranial aneurysms treated with PEDs...
June 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28492442/neuroendovascular-intervention-evolving-at-the-intersection-of-neurosurgery-and-neuro-ophthalmology
#13
Jason M Davies, L Nelson Hopkins
No abstract text is available yet for this article.
June 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28481391/novel-hybrid-operating-table-for-neuroendovascular-treatment
#14
Park Jong-Hyun, Mun Jonghyeon, Shin Dong-Seung, Kim Bum-Tae
BACKGROUND: The integration of interventional and surgical techniques is requiring the development of a new working environment equipped for the needs of an interdisciplinary neurovascular team. However, conventional surgical and interventional tables have only a limited ability to provide for these needs. We have developed a concept mobile hybrid operating table that provides the ability for such a team to conduct both endovascular and surgical procedures in a single session. METHODS: We developed methods that provide surgeons with angiography-guided surgery techniques for use in a conventional operating room environment...
March 25, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28449126/results-of-the-answer-trial-using-the-pulserider-for-the-treatment-of-broad-necked-bifurcation-aneurysms
#15
Alejandro M Spiotta, Colin P Derdeyn, Satoshi Tateshima, Jay Mocco, R Webster Crowley, Kenneth C Liu, Lee Jensen, Koji Ebersole, Alan Reeves, Demetrius K Lopes, Ricardo A Hanel, Eric Sauvageau, Gary Duckwiler, Adnan Siddiqui, Elad Levy, Ajit Puri, Lee Pride, Roberta Novakovic, M Imran Chaudry, Raymond D Turner, Aquilla S Turk
BACKGROUND: The safety and probable benefit of the PulseRider (Pulsar Vascular, Los Gatos, California) for the treatment of broad-necked, bifurcation aneurysms was studied in the context of the prospective, nonrandomized, single arm clinical trial-the Adjunctive Neurovascular Support of Wide-neck aneurysm Embolization and Reconstruction (ANSWER) Trial. OBJECTIVE: To present the results of the United States cases employing the PulseRider device as part of the ANSWER clinical trial...
April 25, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28431023/safety-and-efficacy-of-the-sofia-6f-plus-distal-access-reperfusion-catheter-in-the-endovascular-treatment-of-acute-ischemic-stroke
#16
Hussain Shallwani, Hakeem J Shakir, Leonardo Rangel-Castilla, Jason M Davies, Ashish Sonig, Mithun G Sattur, Bernard R Bendok, Kenneth V Snyder, Adnan H Siddiqui, Elad I Levy
BACKGROUND: Neuroendovascular intervention has become a key treatment option for acute ischemic stroke. The Sofia (6F) PLUS catheter was designed for neurovascular access for diagnostic or therapeutic interventions. OBJECTIVE: To report the first series describing use of the Sofia PLUS intermediate/distal access reperfusion catheter in the treatment of acute ischemic stroke. METHODS: In this retrospective study, 41 stroke cases were identified in which the catheter was utilized for thrombolysis/thrombectomy...
April 19, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28366062/initial-experience-with-a-multiple-parallel-guidewire-support-system-for-complex-tortuous-aortic-arch-navigation-and-great-vessel-catheterization-technical-note
#17
Leonardo Rangel-Castilla, Hakeem J Shakir, Adnan H Siddiqui
The ability to traverse an anatomically challenging and complex arch is paramount to the success of any neuroendovascular procedure. With age, the aortic arch becomes elongated, calcified, and less compliant. The authors present the initial experience with a multiple parallel guidewire system (ZigiWire Mode 3) for catheterization through a complex tortuous aortic arch to access extracranial vessels. The ZigiWire is an organized guidewire system that uses consecutive delivery of 3 small-diameter (0.014-inch) guidewires that are progressively advanced in parallel to secure support-wire access...
April 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28366056/expanding-the-treatment-window-for-ischemic-stroke-through-the-application-of-novel-system-based-technology
#18
REVIEW
Mohammad El-Ghanem, Fawaz Al-Mufti, Venkatraman Thulasi, Inder Paul Singh, Chirag Gandhi
Recent randomized controlled trials have demonstrated the superiority of endovascular treatment (ET) over medical management in the treatment of acute ischemic stroke patients with anterior circulation emergent large vessel occlusions (ELVOs). Due to such accumulating evidence, expanding ET has become of paramount importance. Advancements in modern technology have enabled the use of mobile stroke units, telestroke networks, mobile neuroendovascular teams, and smartphone applications that shorten the time window to treatment and, thus, make patients more amenable to ET...
April 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28280103/association-of-genetic-variant-and-platelet-function-in-patients-undergoing-neuroendovascular-stenting
#19
Xin-Gang Li, Ning Ma, Shu-Sen Sun, Zhe Xu, Wei Li, Yong-Jun Wang, Xin Yang, Zhong-Rong Miao, Zhi-Gang Zhao
INTRODUCTION: The risk of recurrent ischaemic events is related to platelet function, which is often assessed by thromboelastography (TEG). TEG has high interindividual variability. OBJECTIVE: To identify causal variants associated with TEG parameters in patients who receive aspirin and clopidogrel after intra- or extracranial stenting. METHODS: Patients who underwent stenting for extracranial or intracranial stenosis (70-99%) were recruited into the study...
March 9, 2017: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28270000/retrograde-semi-retrieval-technique-for-combined-stentriever-plus-aspiration-thrombectomy-in-acute-ischemic-stroke
#20
Ming Wei, Zhiqiang Wei, Xin Li, Hong Li
The endovascular treatment of acute ischemic stroke has become a standard procedure. The combination of multiple neuroendovascular devices provides more possibilities for the improvement of the thrombectomy technique. We describe a modified retrieval technique using a distal intracranial catheter (DIC) for the semi-retrieval of stentriever during the thrombectomy procedure. The retrograde semi-retrieval technique involves completely unfolding the stent retriever by pulling a Navien catheter and the partial re-sheath of a retrievable stent forming a tapered configuration by pushing the Navien catheter, which results in the thrombi being embedded into the strut, securing the clot within the stent and there being a shorter distance for the clot to travel...
June 2017: Interventional Neuroradiology
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