Association of Stent-Retriever Characteristics in Establishing Successful Reperfusion During Mechanical Thrombectomy

2022 ◽  
Author(s):  
Petra Cimflova ◽  
Nishita Singh ◽  
Johanna M. Ospel ◽  
Martha Marko ◽  
Nima Kashani ◽  
...  
Keyword(s):  
Mechanical Thrombectomy ◽  
Stent Retriever

Mechanical thrombectomy using a Solitaire stent retriever in the treatment of pediatric acute ischemic stroke

2019 ◽  
Vol 23 (3) ◽  
pp. 363-368 ◽  
Author(s):  
Bing Zhou ◽  
Xiao-Chuan Wang ◽  
Jun-Yi Xiang ◽  
Ming-Zhao Zhang ◽  
Bo Li ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Balloon Dilation ◽  
Stent Retriever ◽  
National Institutes Of Health ◽  
Clinical Prognosis ◽  
Nihss Score ◽  
Grade 3

OBJECTIVEMechanical thrombectomy using a Solitaire stent retriever has been widely applied as a safe and effective method in adult acute ischemic stroke (AIS). However, due to the lack of data, the safety and effectiveness of mechanical thrombectomy using a Solitaire stent in pediatric AIS has not yet been verified. The purpose of this study was to explore the safety and effectiveness of mechanical thrombectomy using a Solitaire stent retriever for pediatric AIS.METHODSBetween January 2012 and December 2017, 7 cases of pediatric AIS were treated via mechanical thrombectomy using a Solitaire stent retriever. The clinical practice, imaging, and follow-up results were reviewed, and the data were summarized and analyzed.RESULTSThe ages of the 7 patients ranged from 7 to 14 years with an average age of 11.1 years. The preoperative National Institutes of Health Stroke Scale (NIHSS) scores ranged from 9 to 22 with an average of 15.4 points. A Solitaire stent retriever was used in all patients, averaging 1.7 applications of thrombectomy and combined balloon dilation in 2 cases. Grade 3 on the modified Thrombolysis In Cerebral Infarction scale of recanalization was achieved in 5 cases and grade 2b in 2 cases. Six patients improved and 1 patient died after thrombectomy. The average NIHSS score of the 6 cases was 3.67 at discharge. The average modified Rankin Scale score was 1 at the 3-month follow-up. Subarachnoid hemorrhage after thrombectomy occurred in 1 case and that patient died 3 days postoperatively.CONCLUSIONSThis study shows that mechanical thrombectomy using a Solitaire stent retriever has a high recanalization rate and excellent clinical prognosis in pediatric AIS. The safety of mechanical thrombectomy in pediatric AIS requires more clinical trials for confirmation.

Bridging Intravenous Thrombolysis Before Mechanical Thrombectomy for Large Artery Occlusion May be Detrimental with Thrombus Fragmentation

2020 ◽  
Vol 17 (1) ◽  
pp. 18-26 ◽  
Author(s):  
Ho Jun Yi ◽  
Jae Hoon Sung ◽  
Dong Hoon Lee
Keyword(s):  
Clinical Outcome ◽  
Subgroup Analysis ◽  
Mechanical Thrombectomy ◽  
Intravenous Thrombolysis ◽  
Artery Occlusion ◽  
Stent Retriever ◽  
Large Artery ◽  
Simultaneous Application

Objective: We investigated whether intravenous thrombolysis (IVT) affected the outcomes and complications of mechanical thrombectomy (MT), specifically focusing on thrombus fragmentation. Methods: The patients who underwent MT for large artery occlusion (LAO) were classified into two groups: MT with prior IVT (MT+IVT) group and MT without prior IVT (MT-IVT) group. The clinical outcome, successful recanalization with other radiological outcomes, and complications were compared, between two groups. Subgroup analysis was also performed for patients with simultaneous application of stent retriever and aspiration. Results: There were no significant differences in clinical outcome and successful recanalization rate, between both groups. However, the ratio of pre- to peri-procedural thrombus fragmentation was significantly higher in the MT+IVT group (14.6% and 16.2%, respectively; P=0.004) compared to the MT-IVT group (5.1% and 6.8%, respectively; P=0.008). The MT+IVT group required more second stent retriever (16.2%), more stent passages (median value = 2), and more occurrence of distal emboli (3.9%) than the MT-IVT group (7.9%, median value = 1, and 8.1%, respectively) (P=0.004, 0.008 and 0.018, respectively). In subgroup analysis, the results were similar to those of the entire patients. Conclusion: Thrombus fragmentation of IVT with t-PA before MT resulted in an increased need for additional rescue therapies, and it could induce more distal emboli. The use of IVT prior to MT does not affect the clinical outcome and successful recanalization, compared with MT without prior IVT. Therefore, we need to reconsider the need for IVT before MT.

scholarly journals Efficacy of Mechanical Thrombectomy using Penumbra ACETM Aspiration Catheter Compared to Stent Retriever SolitaireTM FR in Patients with Acute Ischemic Stroke

2021 ◽  
Vol 11 (4) ◽  
pp. 504
Author(s):  
Dalibor Sila ◽  
Markus Lenski ◽  
Maria Vojtková ◽  
Mustafa Elgharbawy ◽  
František Charvát ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Clinical Outcome ◽  
Acute Ischemic Stroke ◽  
Clinical Outcomes ◽  
Mechanical Thrombectomy ◽  
Binary Logistic Regression ◽  
Stent Retriever ◽  
Good Clinical Outcome ◽  
Significant Difference ◽  
Aspiration Technique

Background: Mechanical thrombectomy is the standard therapy in patients with acute ischemic stroke (AIS). The primary aim of our study was to compare the procedural efficacy of the direct aspiration technique, using Penumbra ACETM aspiration catheter, and the stent retriever technique, with a SolitaireTM FR stent. Secondarily, we investigated treatment-dependent and treatment-independent factors that predict a good clinical outcome. Methods: We analyzed our series of mechanical thrombectomies using a SolitaireTM FR stent and a Penumbra ACETM catheter. The clinical and radiographic data of 76 patients were retrospectively reviewed. Using binary logistic regression, we looked for the predictors of a good clinical outcome. Results: In the Penumbra ACETM group we achieved significantly higher rates of complete vessel recanalization with lower device passage counts, shorter recanalization times, shorter procedure times and shorter fluoroscopy times (p < 0.001) compared to the SolitaireTM FR group. We observed no significant difference in good clinical outcomes (52.4% vs. 56.4%, p = 0.756). Predictors of a good clinical outcome were lower initial NIHSS scores, pial arterial collateralization on admission head CT angiography scan, shorter recanalization times and device passage counts. Conclusions: The aspiration technique using Penumbra ACETM catheter is comparable to the stent retriever technique with SolitaireTM FR regarding clinical outcomes.

scholarly journals Inadvertent Detachment of Stent Retrievers during Mechanical Thrombectomy—A Clinical and Biomechanical Perspective

Life ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 658
Author(s):  
Piotr Piasecki ◽  
Marek Wierzbicki ◽  
Piotr Tulik ◽  
Katarzyna Potocka ◽  
Adam Stępień ◽  
...  
Keyword(s):  
Mechanical Thrombectomy ◽  
Clinical Course ◽  
Phantom Study ◽  
Stent Retriever ◽  
Vessel Occlusion ◽  
Intracranial Vessel ◽  
Mechanical Study ◽  
Stent Retrievers ◽  
Phantom Studies ◽  
Stroke Centre

Background: The inadvertent detachment of stent retrievers during mechanical thrombectomy is an extremely rare but feared complication associated with poor clinical outcomes. We discuss management considerations after an unexpected disconnection of the pRESET stent retriever during mechanical thrombectomy, based on clinical experience and mechanical and phantom studies. Methods: We present a clinical course of rare accidents of stent-retriever separation inside an intracranial vessel that occurred in patients in a comprehensive stroke centre between 2018 and 2020. We designed a phantom study to assess the Tigertriever’s ability to remove a detached stent retriever from intercranial vessels. In the mechanical study, several types of stent retrievers were evaluated in order to find the weakest point at which detachment occurred. Results: Two patients (~0.7%) with inadvertent stent-retriever detachment were found in our database. Failed attempts of endovascular removal with no recanalization at the end of procedure were reported in both cases. mRS after 3 months was three and four respectively. In the mechanical study, the Tigertriever was the most resistant to detachment and was followed by Embotrap > pRESET > 3D Separator. In the phantom study, the pRESET device detached in a configuration resembling the M1 segment was successfully removed with the Tigertriever. Conclusions: Conservative management of the inadvertent detachment of stent retrievers during mechanical thrombectomy in large vessel occlusion may be acceptable in order to avoid further periprocedural complications after unsuccessful device removal attempts. Based on the phantom and mechanical studies, the Tigertriever may be a useful tool for the removal of detached pRESET devices.

scholarly journals Inadvertent Stent Retriever Detachment: A Multicenter Case Series and Review of Device Experience FDA Reports

2015 ◽  
Vol 4 (3-4) ◽  
pp. 75-82 ◽  
Author(s):  
Hesham Masoud ◽  
Thanh N. Nguyen ◽  
Coleman O. Martin ◽  
William E. Holloway ◽  
Sudheer Ambekar ◽  
...  
Keyword(s):  
First Generation ◽  
Mechanical Thrombectomy ◽  
Rare Complication ◽  
Case Series ◽  
Standard Of Care ◽  
Stent Retriever ◽  
Large Vessel Occlusion ◽  
Vessel Occlusion ◽  
The Us ◽  
Solitaire Fr

Mechanical thrombectomy using retrievable stents or stent retriever devices has become the mainstay of intra-arterial therapy for acute ischemic stroke. The recent publication of a series of positive trials supporting intra-arterial therapy as standard of care for the treatment of large vessel occlusion will likely further increase stent retriever use. Rarely, premature stent detachment during thrombectomy may be encountered. In our multicenter case series, we found a rate of detachment of less than 1% (n = 7/1,067), and all were first-generation Solitaire FR devices. A review of the US Food and Drug Administration database of device experience yielded 90 individual adverse reports of detachment. There were 82, 1 and 7 detachments of Solitaire FR (first generation), Solitaire FR2 (second generation) and Trevo devices, respectively. We conclude with a brief overview of the technical and procedural considerations which may be helpful in avoiding this rare complication.

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

2021 ◽  
Vol 10 (9) ◽  
pp. 1802
Author(s):  
Grzegorz Meder ◽  
Paweł Żuchowski ◽  
Wojciech Skura ◽  
Violetta Palacz-Duda ◽  
Milena Świtońska ◽  
...  
Keyword(s):  
Endovascular Treatment ◽  
Clinical Outcomes ◽  
Mechanical Thrombectomy ◽  
Statistical Significance ◽  
Stent Retriever ◽  
Single Center Experience ◽  
Significant Difference ◽  
First Pass ◽  
Need To Evaluate ◽  
The Difference

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. The primary endpoint was the frequency of perfect reperfusion defined as grade 3 of the modified Thrombolysis in Cerebral Infarction scale (mTICI) after the first pass. The secondary endpoints were the procedure success, defined as mTICI grades 2b-3; time of the procedure; clinical outcome, measured by 90 days’ modified Rankin Scale (mRS) score; Δ NIHSS, defined as the difference between National Institutes of Health Stroke Scale (NIHSS) score at patients’ admission and discharge; and the total number of device passes. Results: Out of the 70 patients included, 33 were treated with SO and 37 with CA. In both groups, a total number of 42 patients received intravenous recombined tissue plasminogen activator (iv-rTPA: 20 patients (60.6%) in the SO group and 22 patients (59.5%) in the CA group (p = 1.000). There was a significant difference between the groups regarding first-pass success rate, with 46% in the CA group and 18% in the SO group, (OR 3.83, 95% CI 1.28 to 11.44, p = 0.016). Complete procedure success tended to be more frequent in the CA group than in the SO group—94.6% vs. 84.8% (OR 3.13, 95% CI 0.56 to 17.34, p = 0.193)—and CA tended to require a lower number of passes than SO (mean 1.76 vs. 2.09 passes per procedure, p = 0.114), yet these differences did not reach statistical significance. Mean duration of the procedure was significantly shorter in the CA group than in the SO group (49 min vs. 64 min, p = 0.017). There was a significant difference in clinical outcomes, with higher Δ NIHSS (9.3 in the CA group vs. 6.7 in the SO group, p = 0.025) after the procedure and 90-day mRS (median 2 in the CA group vs. 4 in the SO group, p = 0.031). Conclusions: Combining stent retrievers with aspiration catheters may offer a beneficial effect on angiographic results and clinical outcomes in stroke patients undergoing endovascular treatment.

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

2021 ◽  
pp. neurintsurg-2021-017425
Author(s):  
Leonardo Renieri ◽  
Iacopo Valente ◽  
Adam A Dmytriw ◽  
Ajit S Puri ◽  
Jasmeet Singh ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Clinical Outcome ◽  
Mechanical Thrombectomy ◽  
Circle Of Willis ◽  
Stent Retriever ◽  
National Institutes Of Health ◽  
Neurological Deficits ◽  
Stent Retrievers ◽  
Subarachnoid Hemorrhages ◽  
Combined Technique

BackgroundM2 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.MethodsA retrospective review of patients with ischemic stroke undergoing mechanical thrombectomy for M2 occlusions from 13 centers in North American and Europe was performed. Tandem or multiple-territory occlusions were excluded. The primary outcome was 90-day modified Rankin Scale and reperfusion rates across stent-retriever, direct aspiration and combined techniques.ResultsThere were 465 patients (mean age 71.48±14.03 years, 53.1% female) with M2 occlusions who underwent mechanical thrombectomy. Stent-retriever alone was used in 133 (28.6%), direct aspiration alone in 93 (20.0%) and the combined technique in 239 (51.4%) patients. Successful reperfusion was achieved with the combined technique in 198 (82.2%; OR 2.6 (1.1–6.9)), with stent-retriever alone in 112 (84.2%; OR 9.2 (1.9–44.6)) and with direct aspiration alone in 62 (66.7%; referencecategory). Intraprocedural subarachnoid hemorrhages (iSAH) were 36 (7.7%) and were more likely to occur in patients treated with the stent-retrievers (OR 5.0 (1.1–24.3)) and combined technique (OR 4.6 (1.1–20.9)). Good clinical outcome was achieved in 260 (61.8%) patients, while 59 (14.0%) patients died. Older age, higher baseline NIHSS (National Institutes of Health Stroke Scale), parenchymal hemorrhage and iSAH were associated with poor outcome while successful recanalization and higher baseline ASPECTS (Alberta Stroke Program Early CT Score) were associated with good outcome. No differences were found among the three techniques in terms of clinical outcome.ConclusionStent-retrievers and a combined approach for M2 occlusions seem more effective than direct aspiration, but with higher rates of iSAH. This leads to no detectable difference in clinical outcome at 3 months.

Abstract 1122‐000196: First‐Line Direct Contact Aspiration Versus Stent‐Retriever Technique: Real‐World Comparative Outcomes for Successful Mechanical Thrombectomy

2021 ◽  
Vol 1 (S1) ◽  
Author(s):  
Ashutosh Mahapatra ◽  
Yasaman Moazeni ◽  
Thomas Patterson ◽  
Ramez Abdalla ◽  
Jenny Tsai ◽  
...  
Keyword(s):  
Hospital Mortality ◽  
Clinical Outcomes ◽  
Real World ◽  
Direct Contact ◽  
Mechanical Thrombectomy ◽  
Disease Process ◽  
Stent Retriever ◽  
Large Vessel ◽  
First Line ◽  
Significant Difference

Introduction : Mechanical thrombectomy for large‐vessel acute ischemic stroke has been adopted as the standard of care treatment across the world, with dramatic improvements in long‐term functional outcomes for an otherwise debilitating disease process. Timely and complete recanalization are paramount in achieving good outcomes. Though several revascularization techniques have been described, direct contact aspiration and clot removal via stent‐retriever remain the foundation of endovascular stroke therapy. Utilizing the NeuroVascular Quality Initiative – Quality Outcomes Database (NVQI‐QOD), we present our data on real‐world, first‐line practice for treatment of large vessel occlusions (LVOs), and compare angiographic and clinical outcomes between direct contact aspiration and stent‐retriever mechanical thrombectomy techniques. Methods : Retrospective analysis of the NVQI‐QOD was performed. We included patients with LVOs that underwent mechanical thrombectomy who were older than 18 and whose baseline NIHSS ≥ 6. We compared procedural times, rate of revascularization, and outcomes, including in‐hospital mortality and discharge NIHSS. Results : We identified a total of 2381 patients who met the inclusion criteria, of which 998 (41.9%) underwent treatment with direct contact aspiration alone and 1383 (58.1%) underwent treatment utilizing a stent‐retriever (with or without local aspiration). There were no significant differences in the baseline median NIHSS scores (16 vs 17, p = 0.25) or baseline median ASPECTS scores (9 vs 9, p = 0.7). No significant difference was seen in time metrics, including last known well to puncture (282 min vs. 280 min, p = 0.22) or recanalization (323 min vs. 322 min, p = 0.39), ED to puncture (75 min vs. 71 min, p = 0.25) or recanalization (158 min vs. 160 min, p = 0.55), or median procedure times between the two groups (23 vs 23 min, p = 0.64). The median number of passes required for recanalization was lower in the direct aspiration group (1 vs 2, p = 0.01). Though there was no difference in successful recanalization (TICI 2B‐3) between the two groups (86.1% vs 88%, p = 0.71), there was a lower rate of complete recanalization (TICI 2C‐3) in the direct aspiration group (46% vs 51.7%, p = 0.007). There was also a lower rate of adjunct treatments (defined as the use of GP IIb/IIIa inhibitors, P2Y12 inhibitors, and/or salvage angioplasty and/or stenting) required in the direct contact aspiration group (36.1% vs 44.4%, p < 0.001). There were no differences noted in discharge NIHSS scores (5 vs 4, p = 0.21) or in‐hospital mortality (22.2% vs 22.5%, p = 0.92). Conclusions : In the NVQI‐QOD, stent‐retriever techniques were associated with higher rates of complete recanalization when compared to direct contact aspiration alone, although acceptable (TICI 2B‐3) recanalization rates were similar. There were no statistically significant differences in procedure times or clinical outcomes at discharge.

Azygous Anterior Cerebral Artery Acute Occlusion Managed With Endovascular Mechanical Thrombectomy: 2-Dimensional Operative Video

2018 ◽  
Vol 16 (4) ◽  
pp. 514-515 ◽  
Author(s):  
Leonardo Rangel-Castilla ◽  
Adnan H Siddiqui
Keyword(s):  
Cerebral Artery ◽  
Cerebral Blood Volume ◽  
Mechanical Thrombectomy ◽  
Anterior Cerebral Artery ◽  
Stent Retriever ◽  
Vessel Occlusion ◽  
Nihss Score ◽  
Acute Occlusion ◽  
Intravenous Tissue Plasminogen Activator ◽  
Azygous Anterior Cerebral Artery

Abstract Mechanical thrombectomy has become the standard of care for management of most acute large-vessel occlusion (LVO) strokes. Most intracranial occlusions are located in the middle cerebral and internal carotid arteries. We present a unique case of acute occlusion of an azygous anterior cerebral artery (ACA). A 59-yr-old man with known hypertension and alcoholism presented with right hemiparesis, right facial palsy, aphasia, and dysarthria. His initial National Institutes of Health Stroke Scale (NIHSS) score was 20. Computed tomographic angiography and perfusion imaging demonstrated acute bilateral ACA occlusion with viable penumbra and preserved cerebral blood volume. The patient was not a candidate for intravenous tissue plasminogen activator because he presented with a wake-up stroke. After consent was obtained from his family, the patient was taken urgently for endovascular recanalization. Digital subtraction angiography confirmed acute azygous ACA occlusion. Under conscious sedation, the patient underwent mechanical thrombectomy with a stent retriever and a large-bore aspiration catheter. Successful revascularization (thrombolysis in cerebral infarction [TICI] grade 3) of the azygous ACA and both A2 arteries was obtained after 2 attempts and the use of a different stent retriever (first a 3 × 30 mm Trevo [Stryker Neurovascular, Kalamazoo, Michigan] and then a 4 × 40 mm Solitaire Platinum [Medtronic, Dublin, Ireland]). A reperfusion catheter was used during both attempts. No procedure-related complications occurred. The patient was discharged to a rehabilitation facility 3 d after the procedure with an NIHSS score of 2. In this video, we present the operative nuances of an uncommon location of LVO and its endovascular management.

Double Stent Retriever (SR) Technique: A Novel Mechanical Thrombectomy Technique to Facilitate the Device-Clot Interaction for Refractory Acute Cerebral Large Vessel Occlusions

2020 ◽  
Vol 141 ◽  
pp. 175-183 ◽  
Author(s):  
Taichiro Imahori ◽  
Shinichi Miura ◽  
Masahiro Sugihara ◽  
Takashi Mizobe ◽  
Hideo Aihara ◽  
...  
Keyword(s):  
Mechanical Thrombectomy ◽  
Stent Retriever ◽  
Large Vessel ◽  
Double Stent
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