394 results match your criteria stent retrievers

The first virtual patient-specific thrombectomy procedure.

J Biomech 2021 Jul 10;126:110622. Epub 2021 Jul 10.

Laboratory of Biological Structure Mechanics (LaBS), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan, Italy. Electronic address:

Treatment of acute ischemic stroke has been recently improved with the introduction of endovascular mechanical thrombectomy, a minimally invasive procedure able to remove a clot using aspiration devices and/or stent-retrievers. Despite the promising and encouraging results, improvements to the procedure and to the stent design are the focus of the recent efforts. Computational studies can pave the road to these improvements, providing their ability to describe and accurately reproduce a real procedure. Read More

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Combined Approach to Stroke Thrombectomy Using a Novel Short Flexible Aspiration Catheter with a Stent Retriever : Preliminary Clinical Experience.

Clin Neuroradiol 2021 Jul 20. Epub 2021 Jul 20.

IDI-Radiology, University Hospital Dr Josep Trueta, Girona, Spain.

Background: Large-bore aspiration catheters enabling greater flow rates and suction force for mechanical thrombectomy might improve outcomes in patients with stroke secondary to large-vessel occlusion. Complete or near-complete reperfusion after a single thrombectomy pass (first-pass effect) is associated with improved clinical outcomes. We assessed the efficacy and safety of novel MIVI Q™ aspiration catheters in combination with stent-retriever devices. Read More

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Comparison of balloon guide catheters and standard guide catheters for acute ischemic stroke: A systematic review and meta-analysis.

World Neurosurg 2021 Jul 16. Epub 2021 Jul 16.

Nested Knowledge, Inc, 1430 Avon St N, St. Paul, MN, USA; Superior Medical Experts, 1430 Avon St N, St. Paul, MN, USA; Duke University Law School, Durham, NC, USA. Electronic address:

Background: Balloon guide catheters (BGC) are designed to induce flow arrest during mechanical thrombectomy (MT) procedures for acute ischemic stroke due to large vessel occlusion, and have been associated with improved clinical and angiographic outcomes. We conducted a systematic review and meta-analysis evaluating the relative technical and clinical outcomes associated with BGC vs. non-BGC approaches. Read More

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First-Pass Reperfusion by Mechanical Thrombectomy in Acute M1 Occlusion: The Size of Retriever Matters.

Front Neurol 2021 22;12:679402. Epub 2021 Jun 22.

Neuroradiologische Klinik, Klinikum Stuttgart, Stuttgart, Germany.

Single-pass complete reperfusion using stent retrievers has been shown to improve functional outcome in patients with large vessel occlusion strokes. The aim of this study was to investigate the optimal size of stent retrievers to achieve one-pass complete reperfusion by mechanical thrombectomy. The study evaluated the results of aspiration-assisted mechanical thrombectomy of acute isolated occlusion of the middle cerebral artery in the M1 segment with a novel 5 × 40-mm stent retriever compared to the usual 4 × 20-mm device. Read More

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Endoscopic management of high-grade biliary strictures complicating living donor liver transplantation using soehendra stent retrievers.

Scand J Gastroenterol 2021 Jul 9:1-6. Epub 2021 Jul 9.

Department of Gastroenterology, Amrita Institute of Medical Sciences, Kochi, India.

Background: Biliary strictures following living donor liver transplantation (LDLT) are usually managed by endoscopic retrograde cholangiography (ERC) with stricture dilation and stent placement. While current endoscopic techniques are successful in most cases, high-grade biliary strictures (HGBS) pose a challenge using currently employed techniques which have a low rate of technical success.

Aims: In this study, we have explored the safety and efficacy of Soehendra stent retrievers (SSR) for the dilation of HGBS complicating LDLT. Read More

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Device size selection can enhance Y-stentrieving efficacy and safety as a rescue strategy in stroke thrombectomy.

J Neurointerv Surg 2021 Jul 7. Epub 2021 Jul 7.

Marcus Stroke and Neuroscience Center, Grady Memorial Hospital, and the Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, USA.

Background: Despite advancements in stroke treatment, refractory clots are relatively common, prompting the exploration of alternative techniques. Bifurcation occlusions pose specific intraprocedural challenges, occasionally dealt with by two stentrievers deployed in Y-configuration. Previous studies have portrayed this strategy as feasible, yet little is known about its safety and efficacy, and how to best select retrievers. Read More

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Mechanical thrombectomy beyond the circle of Willis: efficacy and safety of different techniques for M2 occlusions.

J Neurointerv Surg 2021 Jul 5. Epub 2021 Jul 5.

Department of Neurosurgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.

Background: M2 segment occlusions represent approximately one-third of non-lacunar ischemic stroke and can lead to permanent neurological deficits. Various techniques are available for mechanical thrombectomy beyond the circle of Willis, but data evaluating their effectiveness and safety are lacking.

Methods: A retrospective review of patients with ischemic stroke undergoing mechanical thrombectomy for M2 occlusions from 13 centers in North American and Europe was performed. Read More

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Comparison of effectiveness and outcomes among different thrombectomy techniques in acute basilar artery occlusion: a dual-center experience.

Neurosurg Focus 2021 Jul;51(1):E8

Departments of1Neurosurgery.

Objective: Acute basilar artery occlusion (BAO) is a rare large-vessel occlusion associated with high morbidity and mortality. Modern thrombectomy with stent retrievers and large-bore aspiration catheters is highly effective in achieving recanalization, but a direct comparison of different techniques for acute BAO has not been performed. Therefore, the authors sought to compare the technical effectiveness and clinical outcomes of stent retriever-assisted aspiration (SRA), aspiration alone (AA), and a stent retriever with or without manual aspiration (SR) for treatment of patients presenting with acute BAO and to evaluate predictors of clinical outcome in their cohort. Read More

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Analysis of 565 thrombectomies for anterior circulation stroke: A Brazilian registry.

Interv Neuroradiol 2021 Jun 18:15910199211026995. Epub 2021 Jun 18.

Division of Interventional Neuroradiology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.

Introduction: The benefits of mechanical thrombectomy in the treatment of patients with acute stroke due to large vessel occlusions (LVOs) have been extensively demonstrated by randomized trials and registries in developed countries. However, data on thrombectomy outside controlled trials are scarce in developing countries. The aim of this study was to assess the safety and efficacy, and to investigate the predictors for good and poor outcomes of thrombectomy for treatment of AIS due to anterior circulation LVOs in Brazil. Read More

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Rescue Maneuver of Migrated Coil Using the ERIC Device after Previous Attempts with Conventional Stentrievers.

Neurointervention 2021 Jul 16;16(2):158-164. Epub 2021 Jun 16.

Interventional Neuroradiology/Endovascular Neurosurgery, Hospital Clínico Universitario de Valladolid, Valladolid, Spain.

Coil prolapse or migration is a rare but potentially serious complication that may occur during aneurysm embolization, with no standard management currently described. Here we describe our experience with the Embolus Retriever with Interlinked Cages (ERIC) device® (Microvention, Aliso Viejo, CA, USA) for the retrieval of prolapsed or migrated coils in a case series and Flow-Model analysis. First, a retrospective review was performed using our institution database for patients in which coil prolapse or migration occurred during aneurysm embolization, and data was collected and analyzed. Read More

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Atherosclerotic Components in Thrombi Retrieved by Thrombectomy for Internal Carotid Artery Occlusion Due to Large Artery Atherosclerosis: A Case Report.

Front Neurol 2021 28;12:670610. Epub 2021 May 28.

Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.

The correlation between the composition of thrombi retrieved by mechanical thrombectomy (MT) and stroke etiology is inconclusive. We describe a case with atherosclerotic components in thrombi retrieved by MT for acute internal carotid artery (ICA) occlusion. A 69-year-old man with acute onset of global aphasia and right hemiplegia was transferred to our institute. Read More

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Blind Exchange With Mini-Pinning Technique Using the Tron Stent Retriever for Middle Cerebral Artery M2 Occlusion Thrombectomy in Acute Ischemic Stroke.

Front Neurol 2021 19;12:667835. Epub 2021 May 19.

Department of Cerebrovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan.

The usefulness of the blind exchange with mini-pinning (BEMP) technique has recently been reported for mechanical thrombectomy in patients with stroke owing to medium vessel occlusion (MeVO). The Tron stent retriever can be delivered and deployed through a 0.0165-inch microcatheter. Read More

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Failure modes and effects analysis of mechanical thrombectomy for stroke discovered in human brains.

J Neurosurg 2021 Jun 4:1-8. Epub 2021 Jun 4.

3Neurosurgery, University of Michigan, Ann Arbor, Michigan.

Objective: Despite advancement of thrombectomy technologies for large-vessel occlusion (LVO) stroke and increased user experience, complete recanalization rates linger around 50%, and one-third of patients who have undergone successful recanalization still experience poor neurological outcomes. To enhance the understanding of the biomechanics and failure modes, the authors conducted an experimental analysis of the interaction of emboli/artery/devices in the first human brain test platform for LVO stroke described to date.

Methods: In 12 fresh human brains, 105 LVOs were recreated by embolizing engineered emboli analogs and recanalization was attempted using aspiration catheters and/or stent retrievers. Read More

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Clot-based radiomics features predict first pass effect in acute ischemic stroke.

Interv Neuroradiol 2021 May 18:15910199211019176. Epub 2021 May 18.

Department of Radiology, Health Sciences University, Tepecik Educational and Research Hospital, Izmir, Turkey.

Purpose: Our aim was to evaluate the performance of clot-based radiomics features (RFs) for predicting first pass effect (FPE) in patients with acute ischemic stroke (AIS). The secondary purpose was to search for any other variables associated with FPE.

Materials And Methods: Patients who underwent mechanical thrombectomy (MT) for anterior circulation large vessel stroke in a single center were retrospectively reviewed. Read More

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The Protective Effects of Statins Towards Vessel Wall Injury Caused by a Stent Retrieving Mechanical Thrombectomy Device : A Histological Analysis of the Rabbit Carotid Artery Model.

J Korean Neurosurg Soc 2021 May 14. Epub 2021 May 14.

Department of Neurosurgery, Veterans Health Service Medical Center, Seoul, Korea.

Objective: Endovascular mechanical thrombectomy (MT) has been regarded as one of the standard treatments for acute ischemic stroke caused by large vessel occlusion. Despite the wide use of stent retrievers for MT, arterial intimal damage caused when deployed stent is pulled has been a certain disadvantage. We hypothesized that statin could protect and stabilize vessel damage after endovascular MT using a stent retriever. Read More

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Fibrin-Platelet Clots in Acute Ischemic Stroke. Predictors and Clinical Significance in a Mechanical Thrombectomy Series.

Front Neurol 2021 20;12:631343. Epub 2021 Apr 20.

Department of Neurology, Hospital General Universitario de Albacete, Albacete, Spain.

The histological composition of the clot influences its mechanical properties, affects the efficacy of endovascular treatment (EVT), and could determine the clinical outcome of patients with acute ischemic stroke (AIS). Insights into clot composition may guide therapeutic decision-making prior to EVT and facilitate revascularization therapies. Consecutive patients with AIS recorded in a prospective single-center reperfusion registry from December 2015 to December 2019 and treated with EVT were included. Read More

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Thrombectomy of symptomatic isolated occlusions of posterior cerebral arteries in segment P1 and P2 in acute stroke treatment.

Acta Radiol 2021 May 3:2841851211014191. Epub 2021 May 3.

Department of Radiology and Neuroradiology, Knappschaftskrankenhaus Bochum, Germany.

Background: Interventional stroke treatments for occlusions of the posterior circulation are established procedures. However, there are limited data on the treatment of isolated symptomatic P1 and P2 occlusions, which we have examined in this study.

Purpose: To investigate the mechanical thrombectomy of distal posterior occlusions. Read More

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Mechanical Thrombectomy in Stroke. Experience from Switching from Stent Retriever Only to Stent Retriever Combined with Aspiration Catheter.

J Clin Med 2021 Apr 21;10(9). Epub 2021 Apr 21.

Department of Neurosurgery and Neurology, Faculty of Health Sciences, Nicolaus Copernicus University in Toruń, Ludwik Rydygier Collegium Medicum, Ujejskiego 75 Street, 85-168 Bydgoszcz, Poland.

Endovascular treatment is a rapidly evolving technique; therefore, there is a constant need to evaluate this method and its modifications. This paper discusses a single-center experience and the results of switching from the stent retriever only (SO) mechanical thrombectomy (MT) to the combined approach (CA), with a stent retriever and aspiration catheters.

Methods: The study involved a retrospective analysis of 70 patients undergoing MT with the use of either SO or CA. Read More

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Endovascular retrieval of a dislocated pushable coil in the common hepatic artery using a cerebral stent retriever.

CVIR Endovasc 2021 Apr 4;4(1):34. Epub 2021 Apr 4.

Radiology Department, Helios Klikum Erfurt, Nordhäuser Str. 74, 99089, Erfurt, Germany.

Background: This is case of removing a dislocated pushable coil from the common hepatic artery (CHA) as a possible complication of using pushable coils in the embolization of an upper gastrointestinal bleeding (UGIB) from the gastroduodenal artery (GDA) by using a pRESET stent retriever (Phenox, Bochum, Germany) which is utilized mainly for treatment of endovascular stroke.

Case Presentation: An 88-year-old female patient was referred to our hospital to get an emergency embolization of the GDA causing an UGIB with a relevant drop of the hemoglobin level. During the routine embolization of the GDA using pushable coils, a complete dislocation of the last coil into the CHA took place leading to a relevant slowing down of the arterial blood flow to the liver. Read More

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Endovascular treatment for calcified cerebral emboli in patients with acute ischemic stroke.

J Neurosurg 2021 Apr 2:1-11. Epub 2021 Apr 2.

Departments of1Radiology and Nuclear Medicine.

Objective: Calcified cerebral emboli (CCE) are a rare cause of acute ischemic stroke. The authors aimed to assess the association of CCE with functional outcome, successful reperfusion, and mortality. Furthermore, they aimed to assess the effectiveness of intravenous alteplase treatment and endovascular treatment (EVT), as well as the best first-line EVT approach in patients with CCE. Read More

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Endovascular therapy in patients with large vessel occlusion due to cardioembolism large-artery atherosclerosis.

Ther Adv Neurol Disord 2021 11;14:1756286421999017. Epub 2021 Mar 11.

Department of Neurology, Inselspital, University Hospital and University of Bern, Freiburgstrasse, Bern, 3010, Switzerland.

Background And Aims: To investigate whether stroke aetiology affects outcome in patients with acute ischaemic stroke who undergo endovascular therapy.

Methods: We retrospectively analysed patients from the Bernese Stroke Centre Registry (January 2010-September 2018), with acute large vessel occlusion in the anterior circulation due to cardioembolism or large-artery atherosclerosis, treated with endovascular therapy (±intravenous thrombolysis).

Results: The study included 850 patients (median age 77. Read More

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Endovascular treatment of acute basilar artery occlusion: Outcomes, influencing factors and imaging characteristics from the Tama-REgistry of acute thrombectomy (TREAT) study.

J Clin Neurosci 2021 Apr 8;86:184-189. Epub 2021 Feb 8.

Department of Stroke and Cerebrovascular Medicine, Kyorin University, Tokyo, Japan.

Objective: The effectiveness of mechanical thrombectomy (MT) for acute basilar artery occlusion (ABAO) remains unknown. We evaluated the feasibility, safety, and efficacy of endovascular treatment for ABAO.

Methods: We retrospectively investigated patients with ABAO who underwent MT using modern stent retrievers and an aspiration device between January 2015 and March 2019 at 12 comprehensive stroke centers. Read More

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Y-configuration double-stent-retriever thrombectomy for refractory thrombus in middle cerebral artery bifurcation: A case report.

Medicine (Baltimore) 2021 Mar;100(11):e24993

Department of Neurology, Baotou Central Hospital, Baotou, Inner Mongolia, China.

Rationale: Stent retriever mechanical thrombectomy is a recommended treatment for acute ischemic stroke. However, refractory thrombus in artery bifurcation can reduce the rate of successful revascularization.

Patient Concerns: A 72-year-old male, owing to the acute onset of almost complete right-sided hemiplegia and global aphasia, received bridging therapy. Read More

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Early Postmarket Results with EmboTrap II Stent Retriever for Mechanical Thrombectomy: A Multicenter Experience.

AJNR Am J Neuroradiol 2021 05 11;42(5):904-909. Epub 2021 Mar 11.

From the Department of Neurosurgery and Neurology (A.S., V.M.S., Y.S., J.N.J., J.-K.B., P.K.), Baylor College of Medicine, Houston, Texas

Background And Purpose: EmboTrap II is a novel stent retriever with a dual-layer design and distal mesh designed for acute ischemic stroke emergent large-vessel occlusions. We present the first postmarket prospective multicenter experience with the EmboTrap II stent retriever.

Materials And Methods: A prospective registry of patients treated with EmboTrap II at 7 centers following FDA approval was maintained with baseline patient characteristics, treatment details, and clinical/radiographic follow-up. Read More

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Clinical Result of Mechanical Thrombectomy Using Sofia Plus with Acute Ischemic Stroke Compared with the Stent Retriever.

World Neurosurg 2021 May 27;149:e11-e15. Epub 2021 Feb 27.

Department of Neurosurgery, Osaka Medical College, Takatsuki, Osaka, Japan.

Objective: The Sofia catheter is a new large-bore aspiration catheter that allows easy access and good reperfusion. In this study, we analyzed the efficacy and safety of the Sofia catheter in comparison with stent retrievers as a contact aspiration thrombectomy (CAT) tool for large vessel occlusion.

Methods: We enrolled patients with acute ischemic stroke who underwent endovascular thrombectomy from April 2017 and April 2020 in our hospital. Read More

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Endovascular foreign body removal of a MynxGrip polyethylene glycol (PEG) sealant embolus using a cerebral stent retriever.

CVIR Endovasc 2021 Mar 1;4(1):23. Epub 2021 Mar 1.

Institute of diagnostic and interventional radiology, Helios Klikum, Erfurt, Germany.

Background: This is a rare case of removing an intra-arterial foreign body represented by MynxGrip polyethylene glycol (PEG) sealant as a rare complication of using the MynxGrip™ Vascular Closure Device (AccessClosure, Inc., Mountain View, CA) using a pRESET stent retriever (Phenox, Bochum, Germany) which is utilized mainly for treatment of endovascular stroke.

Case Presentation: A 60-year-old female patient suffering from intermittent claudication in the right lower limb (stage IIb according to Fontaine) due to a peripheral arterial occlusive disease was presented for an elective revascularization using balloon angioplasty of a short chronic occlusion of the right superficial femoral artery. Read More

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Aspiration Thrombectomy: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 03;20(4):E286-E287

Department of Neurosurgery, PRISMA Health-Upstate, Greenville, South Carolina.

Acute ischemic stroke is one of the leading causes of disability and mortality worldwide. There have been significant improvements to the treatment of acute ischemic stroke over the past 5 yr, specifically related to strokes caused by large vessel occlusions. Stent retrievers with and without local aspiration and direct aspiration alone have all been demonstrated as viable treatment options for this patient population. Read More

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Management of Thromboembolic Complications During Aneurysm Coiling: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 04;20(5):E348-E349

Department of Neurologic Surgery, Mayo Clinic, Jacksonville, Florida.

Thromboembolic complications during aneurysm coiling are rare, with higher rates noted in ruptured aneurysms as patients are not usually premedicated with dual antiplatelet therapy.1,2 Management includes a series of escalating strategies, including medical therapy and intra-arterial thrombolysis.3-6 Additional strategies include mechanical thrombectomy with suction aspiration and stent retrievers. Read More

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The SITS Open Study: A Prospective, Open Label Blinded Evaluation Study of Thrombectomy in Clinical Practice.

Stroke 2021 Mar 10;52(3):792-801. Epub 2021 Feb 10.

Department of Clinical Neuroscience (N.A., S.H., N.W.), Karolinska Institutet, Stockholm, Sweden.

Background And Purpose: We designed SITS (Safe Implementation of Treatment in Stroke) Open to determine benefit and safety of thrombectomy in clinical practice for large artery occlusion stroke, using selected stent retrievers plus standard care versus standard care alone.

Methods: SITS Open was a prospective, open, blinded evaluation, international, multicenter, controlled, nonrandomized registry study. Centers lacking access to thrombectomy contributed controls. Read More

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