scholarly journals The Phenox Clot Retriever as Part of a Multimodal Mechanical Thrombectomy Approach in Acute Ischemic Stroke: Single Center Experience in 56 Patients

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Sascha Prothmann ◽  
Hannah Lockau ◽  
Franziska Dorn ◽  
Holger Poppert ◽  
Annette Förschler ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Simultaneous Increase ◽  
Significant Shift ◽  
Intracranial Hemorrhages ◽  
Single Center Experience ◽  
Institutional Learning ◽  
The Mean ◽  
Observation Period

Purpose. We analyzed our experience with the phenox clot retriever as part of a multimodal mechanical thrombectomy (MTE) approach in acute ischemic stroke.Methods. 56 patients were treated by MTE with the phenox clot retriever alone or in combination with other modalities.Results. Overall we achieved TICI 2b/3 reperfusion rates of 61,9%. In multimodally treated patients we achieved reperfusion rates of 72,8%. There were 3 (5,5%) severe adverse events, all symptomatic intracranial hemorrhages. The mean angio to reperfusion times (ART) were 74 minutes for phenox-only procedures and 51 minutes for multimodal procedures. A chronological analysis showed a reduction of ART from 70,5 to 49,4 minutes and an increase of TICI 2b/3 recanalizations from 53,8% to 81,8%. Throughout the observation period there was a significant shift towards multimodal procedures with simultaneous increase of TICI 2b/3 reperfusions. Both effects are partially attributable to our institutional learning curve. NIHSS improvement could be seen in 54% () overall and in 73% () of MCA recanalizations.Conclusions. The phenox clot retriever is a safe and effective tool for MTE in acute stroke patients, with faster and better reperfusion results when used as part of a multimodal strategy. Clinical improvement is more frequent in MCA recanalizations.

Single-center experience with the Tigertriever device for the recanalization of large vessel occlusions in acute ischemic stroke

2018 ◽  
Vol 11 (5) ◽  
pp. 455-459 ◽  
Author(s):  
Batuhan Kara ◽  
Hatem Hakan Selcuk ◽  
Aysun Erbahceci Salik ◽  
Hasanagha Zalov ◽  
Omer Yildiz ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Scale Score ◽  
Mechanical Thrombectomy ◽  
National Institutes Of Health ◽  
Success Rates ◽  
Single Center Experience ◽  
Number Of Patients ◽  
The Mean ◽  
Vessel Rupture

BackgroundTigertriever (Rapid Medical, Yoqneam, Israel) is a new design of stent retriever.PurposeTo evaluate the feasibility, safety, and efficacy of the Tigertriever in patients with acute ischemic stroke who have undergone mechanical thrombectomy.Materials and methodsTwo different techniques—namely, standard unsheathing (SUT) and repetitive inflation-deflation (RID) techniques, were used. Modified Thrombolysis in Cerebral Infarction (mTICI) scores of 2b and 3 were considered as successful recanalization.ResultsA total of 61 thrombectomy procedures with Tigertriever were retrospectively evaluated. The mean age of patients was 60.7 years and their National Institutes of Health Stroke Scale score was 14.7. Overall, the percentage of patients with a mTICI score of 0, 2b, and 3 was 24.6, 26.2, and 49.2, respectively. Successful recanalization and first-pass success rates were 75.4% and 37.7%, respectively. There were no statistical differences between the results of the SUT and RID techniques. No vessel rupture, dissection, or device detachment was observed. The number of patients with a good clinical outcome (modified Rankin Scale score 0–2) was 17 (27.9%).ConclusionOur results showed that the Tigertriever device is safe and efficient for mechanical thrombectomy.

Stand alone mechanical thrombectomy (with penumbra system) for acute ischemic stroke based on MR imaging: Single center experience

2012 ◽  
Vol 60 (4) ◽  
pp. 406
Author(s):  
Manish Shrivastava ◽  
Darshana Sanghvi ◽  
Shirish Hastak ◽  
Sourabh Lahoti ◽  
Annu Aggarwal
Keyword(s):  
Ischemic Stroke ◽  
Mr Imaging ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Single Center ◽  
Single Center Experience

scholarly journals Clot composition of embolic strokes of undetermined source: a feasibility study

BMC Neurology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Amre Nouh ◽  
Tapan Mehta ◽  
Mohamed Hussain ◽  
Xianyuan Song ◽  
Martin Ollenschleger
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
National Institutes Of Health ◽  
Carotid Dissection ◽  
Stroke Patients ◽  
Stroke Etiology ◽  
The Mean ◽  
Undetermined Etiology ◽  
A Prospective Study

Abstract Background A number of emerging studies have evaluated clot composition in acute ischemic stroke. Studies of clot composition of embolic strokes of undetermined strokes are lacking. Objectives We sought to analyze the RBC to platelet ratios in clots and correlated our findings with stroke etiology. Methods This was a prospective study analyzing clots retrieved by mechanical thrombectomy in acute ischemic stroke patients at our institution. All clots were stained and scanned at 200x magnification by using a Scanscope XT digital scanner (Apergio, Vista, California). Image-J software (National Institutes of Health, Bethesda, Maryland) was used for semi quantitative analysis of percentage RBC’s and platelets. Unpaired t-test was used to compare means of RBC to Platelet ratios. Correlation of RBC to Platelet ratios with stroke etiology was performed. Results A total of 33 clots from 33 patients were analyzed. Stroke etiology was undetermined in 6 patients, cardioembolic in 14, large vessel atherosclerosis (LVA) in 9, and carotid dissection in 4. The mean RBC to platelet ratio was 0.78:1 (+/− 0.65) in cardioembolic clots, 1.73:1 (+/− 2.38) in LVA and 1.4:1(+/− 0.70) in carotid dissections. Although patients with undetermined etiology had a similar clot composition to cardioembolic stroke (0.36:1+/− 0.33), (p = 0.19), it differed significantly from LVA and dissections respectively (p = 0.037, p = 0.01). Conclusion In our study, a low RBC to Platelet ratio was found among patients with embolic strokes of undetermined source, however shared similar characteristics with cardioembolic thrombi. Ongoing collection and analysis is needed to confirm these findings and its significance in evaluating stroke etiology.

Thrombus Enhancement Is a Predictor of Clinical Outcome in Acute Ischemic Stroke after Mechanical Thrombectomy

2018 ◽  
Vol 46 (5-6) ◽  
pp. 270-278
Author(s):  
Jonathan Kottlors ◽  
Volker Maus ◽  
Anastasios Mpotsaris ◽  
Özgür A. Onur ◽  
Thomas Liebig ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Clinical Outcome ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Ex Vivo ◽  
Group Testing ◽  
Vessel Occlusion ◽  
Contrast Enhanced Ct ◽  
Enhanced Ct ◽  
The Mean

Background: Ex vivo computed tomography (CT) studies of artificial blood thrombi showed that contrast enhancement (CE) is determined by fibrin-content, while unenhanced density is associated with red blood cells. Thus, the present study investigates patient outcome in association with combined thrombus density measures in native and contrast-enhanced CT (CECT) of acute ischemic stroke patients. Methods: This retrospective study includes 137 patients with M1 occlusions treated by mechanical thrombectomy (MT) between 2010 and 2016. Clinical outcome was determined with modified Rankin Scale (mRS) at 90 days. Differentiation of complete and incomplete large vessel occlusion (CLVO/ILVO) was based on CT and angiography. Two blinded readers classified blood thrombi based on native non-enhanced CT (NECT) as (a) hypo-, (b) iso-, and (c) hyperdense and in CECT angio measurements as (d) not-enhancing, (e) intermediate and (f) enhancing. To make sure that the mean is not represented in any of the maximum/minimum groups, thresholds in both cases were selected in a way that all values within one SD around the mean value form the isodense/intermediate group. In addition, the CE per se was correlated with the outcome. Correlations between imaging and clinical scales were performed with Spearman’s Rho. For the group testing Pearson chi-square test, Mann-Whitney U, as well parametric and nonparametric one-factor ANOVA “Kruskal-Wallis” test including Bonferroni correction for multiple tests ware used. Results: Twenty-three patients with ILVO (16.8%) differed significantly from patients with CLVO in mRS at admission (median 4 vs. 5) and after 90 days (median 1 vs. 4; p < 0.05) and thus were excluded. In the ILVO cohort, the classification according to NECT did not show statistical difference between hypo-, iso- and hyperdense CLVOs in regard to outcome. Classification of CLVOs according to CECT allowed an outcome prediction between the intermediate (median 3) and enhancing group (median 5) and between the enhancing and non-enhancing group (median 3; both p < 0.05) with a correlation of 291 between CE and higher mRS after 90 days (p < 0.005). Conclusions: CE of thrombi – especially in a range from over 18.4 to 40.35 Hounsfield Units – is an independent predictor of poor clinical outcome in patients undergoing MT due to acute middle cerebral artery occlusion.

Abstract 2219: Trevo System: Single Center Experience With A Novel Mechanical Thrombectomy Device

Stroke ◽  
2012 ◽  
Vol 43 (suppl_1) ◽  
Author(s):  
Nuno M Mendonça ◽  
Alan Flores ◽  
Jorge Pagola ◽  
Marta Rubiera ◽  
David Rodríguez-Luna ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Functional Independence ◽  
Median Number ◽  
Single Center Experience ◽  
Procedural Complications ◽  
Thrombectomy Device ◽  
Number Of Passes

Background and Purpose: Recent reports have indicated that mechanical thrombectomy may have potential as a treatment for acute ischemic stroke. This study aims to describe the safety and effectiveness of Trevo RetrieverTM (Concentric Medical Inc, Mountain View, California) using StentrieverTM technology, in revascularization of patients with acute ischemic stroke. Methods: Prospective study evaluating the clinical, radiological and functional outcome of 13 patients with an angiographically verified occlusion of the anterior cerebral circulation. All patients underwent thrombectomy with TR as monotherapy or in combination with intra-arterial thrombolysis, within the first 8 hours from symptoms onset. Successful revascularization was defined as thrombolysis in cerebral ischemia grade 2a to 3. Good outcome was defined as modified Rankin Scale score ≤ 2. Results: Median baseline NIHSS score was 19 (16-22). The occlusion site was MCA in 8 patients and ICA in 5 patients. Five patients received IV tPA before endovascular procedure. Revascularization was achieved in 10 of 13 patients (77%). The median number of passes for maximal recanalization was 2 (1-3) and the mean time from groin puncture to recanalization was 95±31 minutes. No significant intra-procedural complications occurred. Four patients (30%) died during the 90-day follow-up period and 4 patients (30%) achieved functional independence at 3 months. Conclusions: Early clinical experience suggests that the TR can allow safe and effective revascularization in certain subjects with acute ischemic stroke.

Initial experience with a new distal intermediate and aspiration catheter in the treatment of acute ischemic stroke: clinical safety and efficacy

2015 ◽  
Vol 8 (7) ◽  
pp. 714-718 ◽  
Author(s):  
Sibylle Stampfl ◽  
Christoph Kabbasch ◽  
Marguerite Müller ◽  
Anastasios Mpotsaris ◽  
Marc Brockmann ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Clinical Presentation ◽  
The Novel ◽  
Initial Experience ◽  
Stroke Therapy ◽  
Clinical Safety ◽  
Nihss Score ◽  
The Mean

PurposeTo describe our initial experience with the novel 5 F SOFIA (Soft Torqueable catheter Optimized For Intracranial Access) intermediate and aspiration catheter for endovascular treatment of patients with acute ischemic stroke.MethodsA retrospective review was performed in three centers of prospectively collected data of all stroke patients who underwent endovascular therapy using the SOFIA catheter. Patients were enrolled between November 2013 and December 2014. The primary endpoint of the study was accessibility of the thrombus with the SOFIA catheter. As a secondary endpoint, the study assessed recanalization success (Thrombolysis In Cerebral Infarction (TICI) ≥2b). Clinical presentation on admission and discharge was also documented. In addition, catheter- and procedure-related complications (particularly thromboembolic complications) were recorded.ResultsThe SOFIA catheter was used in 115 acute stroke procedures. In 110 cases (96%) the catheter could be advanced to the occlusion site. After mechanical thrombectomy, successful recanalization (TICI ≥2b) was documented in 86.9%. There were no complications related to positioning of the catheter. Distal thrombus migration into a new vascular territory occurred in three patients following thrombectomy with a stent retriever (2.6%). The mean NIH Stroke Scale (NIHSS) score on admission was 16.8±6 and at discharge the mean NIHSS score was 8.2±7.7. Sixteen patients died.ConclusionsThe SOFIA catheter is a safe and efficient catheter for endovascular stroke therapy.

Abstract TP17: Outcomes in Octogenarians Undergoing Mechanical Thrombectomy for Acute Ischemic Stroke: A Single Center Experience

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Hassan Aboul Nour ◽  
Owais Khadem Alsrouji ◽  
Devashi Dharaiya ◽  
Ghada Mohamed ◽  
Alex Chebl ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Clinical Outcomes ◽  
Mechanical Thrombectomy ◽  
Retrospective Chart Review ◽  
The Elderly ◽  
Single Center ◽  
Younger Patients ◽  
Single Center Experience ◽  
Poor Outcomes

Background: Mechanical thrombectomy (MT) for acute ischemic stroke (AIS) in the elderly presents a unique set of challenges and opportunities. Most existing studies include patients up to the age of 90 with stricter criteria of inclusion for patients ≥ 80 years of age. The following study compares the outcomes in octogenarians compared to younger patients in a single center. Methods: We conducted a retrospective chart review of patients who were ≥ 80yo who underwent MT from March 2016 to July 2019. Data on age, recanalization score measured by Thrombolysis in Cerebral Infarction (TICI) score and clinical outcomes were compared to 126 patients < 80 years of age treated during the same time period. Clinical outcomes were classified based on modified Rankin score (mRS) at discharge. Poor outcomes were defined as mRS 4-6. Good recanalization was defined as TICI score 2b or 3. Results: Eighty-three patients with a median age of 86±4.34yo were compared to 126 patients with median age of 63±12.48yo (p<0.0001). Good recanalization was achieved in 74% of patients ≥80yo compared to 84% in patients <80yo (p= 0.06). Poor outcomes were reported in 74.6% of patients ≥80yo compared to 47.0% in patients <80yo (p<0.0001). All-cause mortality was 28.9% in the ≥80yo vs 12.9% in the < 80yo (p=0.006). Conclusion: In our cohort, the clinical outcomes among octogenarians receiving MT were worse than in younger patients despite no difference in recanalization. Various factors may be responsible including overall health status, comorbid conditions and neuroplasticity. Further prospective multicentral studies are needed to better understand the benefit of MT in octogenarians.

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