Stent retriever versus direct aspiration thrombectomy for acute large vessel occlusion: A meta-analysis including 17,556 patients, from MR CLEAN to present

Effects of intravenous thrombolysis on stent retriever and aspiration thrombectomy outcomes: a systematic review and meta-analysis of the randomized controlled trials

BACKGROUND

Risks and benefits of intravenous thrombolysis (IVT) in patients undergoing mechanical thrombectomy (MT) have been a topic of interest. However, IVT's specific effects on stent retriever (SR) and aspiration thrombectomy (ASP) outcomes remain largely unexplored. In this meta-analysis, we aimed to investigate the effects of IVT on SR and ASP thrombectomy outcomes.

METHODS

In accordance with PRISMA guidelines, a systematic literature review was conducted using Medline, Embase, Scopus, Web of Science, and Cochrane Center of Clinical Trials databases. Outcomes of interest included successful recanalization (modified Thrombolysis In Cerebral Infarction (mTICI) ≥2b), modified first pass efficacy (mFPE), functional independence (modified Rankin Scale (mRS) ≤2), symptomatic intracranial hemorrhage (sICH), and embolization to new territories (ENT).

RESULTS

Four randomized controlled trials with 1176 patients were included. SR and ASP resulted in similar mTICI ≥2b, mFPE, and mRS 0-2 rates in patients with and without IVT administration. SR without IVT was associated with a significantly lower rate of mFPE compared with the SR+IVT (RR 0.85, 95% CI 0.74 to 0.97). Furthermore, ASP without IVT resulted in a lower rate of mRS 0-2 than the ASP+IVT with a strong trend towards significance (RR 0.78, 95% CI 0.60 to 1.01). Finally, bridging therapy did not increase sICH and ENT rates after ASP or SR thrombectomy.

CONCLUSIONS

Our findings suggest that SR and ASP thrombectomy have comparable safety and efficacy profiles, regardless of prior IVT administration. Additionally, our results indicate that the addition of IVT may improve certain efficacy outcomes based on the employed first-line MT technique.

Predictors of Angiographic Outcome After Failed Thrombectomy for Large Vessel Occlusion: Insights from the Stroke Thrombectomy and Aneurysm Registry

BACKGROUND

Mechanical thrombectomy failure (MTF) occurs in approximately 15% of cases.

OBJECTIVE

To investigate factors that predict MTF.

METHODS

This was a retrospective review of prospectively collected data from the Stroke Thrombectomy and Aneurysm Registry. Patients who underwent mechanical thrombectomy (MT) for large vessel occlusion (LVO) were included. Patients were categorized by mechanical thrombectomy success (MTS) (≥mTICI 2b) or MTF (

RESULTS

A total of 6780 patients were included, and 1001 experienced anterior circulation MTF. Patients in the MTF group were older (73 vs 72, P = .044) and had higher poor premorbid modified Rankin Scale (mRS) (10.8% vs 8.4%, P = .017). Onset to puncture time was greater in the MTF group (273 vs 260 min, P = .08). No significant differences were found between the access site, use of balloon guide catheter, frontline technique, or first-pass devices between the MTF and MTS groups. More complications occurred in the MTF group (14% vs 5.8%), including symptomatic intracerebral hemorrhage (9.4% vs 6.1%) and craniectomies (10% vs 2.8%) ( P < .001). On UVA, age, poor pretreatment mRS, increased number of passes, and increased procedure time were associated with MTF. Internal carotid artery, M1, and M2 occlusions had decreased odds of MTF. Poor preprocedure mRS, number of passes, and procedure time remained significant on MVA. A subgroup analysis of posterior circulation LVO revealed that number of passes and total procedure time correlated with increased odds of MTF ( P < .001) while rescue stenting was associated with less odds of MTF (odds ratio 0.20, 95% CI 0.06-0.63). Number of passes remained significant on MVA of posterior circulation occlusion subgroup analysis.

CONCLUSION

Anterior circulation MTF is associated with more complications and worse outcomes. No differences were found between techniques or devises used for the first pass during MT. Rescue intracranial stenting may decrease the likelihood of MTF for posterior circulation MT.

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MESH Headings

• Humans
• Stroke/surgery
• Thrombectomy/methods
• Cerebral Hemorrhage
• Retrospective Studies
• Aneurysm
• Registries
• Treatment Outcome
• Brain Ischemia/therapy

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Affiliation(s)

Matthew Webb Department of Neurosurgery, University of Texas Health Science Center San Antonio, San Antonio , Texas , USA
Muhammed Amir Essibayi Medical University of South Carolina, Charleston , South Carolina , USA
Sami Al Kasab Medical University of South Carolina, Charleston , South Carolina , USA
Ilko L Maier University Medical Center Göttingen, Göttingen , Germany
Marios-Nikos Psychogios University Hospital Basel, Basel , Switzerland
Jonathan A Grossberg Emory University, Atlanta , Georgia , USA
Ali Alawieh Emory University, Atlanta , Georgia , USA
Stacey Quintero Wolfe Wake Forest University, Winston-Salem , North Carolina , USA
Adam Arthur University of Tennessee Health Science Center, Memphis , Tennessee , USA
Travis Dumont Bannner University of Arizona Medical Center, Tucson , Arizona , USA
Peter Kan University of Texas Medical Branch, Galveston , Texas , USA
Joon-Tae Kim Chonnam National University Hospital, Gwangju , South Korea
Reade De Leacy Mount Sinai Health System, New York , New York , USA
Joshua Osbun Washington University in St. Louis, St. Louis , Missouri , USA
Ansaar Rai Department of Neuroradiology, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
Pascal Jabbour Department of Neuroradiology, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
Min S Park Thomas Jefferson University Hospital, Philadelphia , Pennsylvania , USA
Roberto Crosa University of Virginia, Charlottesville , Virginia , USA
Michael R Levitt Centro Endovascular Neurológico, Médica Uruguaya, Montevideo , Uruguay
Adam Polifka University of Washington, Seattle , Washington , USA
Shinichi Yoshimura University of Florida, Gainesville , Florida , USA
Charles Matouk Hyogo College of Medicine, Nishinomiya , Japan
Richard W Williamson Yale School of Medicine, New Haven , Connecticut , USA
Isabel Fragata Allegheny General Hospital, Pittsburgh , Pennsylvania , USA
Shakeel A Chowdhry Centro Hospitalar Universitário de Lisboa Central, Lisboa , Portugal
Robert M Starke NorthShore University Health System, Evanston , Illinois , USA
Edgar A Samaniego University of Miami Health System, Miami , Florida , USA
Hugo Cuellar University of Iowa, Iowa City , Iowa , USA
Alejandro Spiotta Medical University of South Carolina, Charleston , South Carolina , USA
Justin Mascitelli Department of Neurosurgery, University of Texas Health Science Center San Antonio, San Antonio , Texas , USA

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Endovascular thrombectomy using a stent retriever catheter for massive pulmonary thromboembolism

Acute massive pulmonary thromboembolism (PE) has a high mortality rate of 18%-65%. Along with anticoagulation and thrombolytic therapy, treatment may require a catheter-based thrombectomy or surgical thrombectomy. We report a case of pulmonary thromboembolism treated with a Stent Retriever (Trevo® NXT ProVue Retriever, Stryker, Kalamazoo, MI, USA), which is commonly used to treat stroke. An 81-year-old woman complained of back pain and was transported to our hospital after she became unconscious. Cardiopulmonary resuscitation was initiated before her arrival at the hospital; she returned to spontaneous circulation after arrival. After undergoing computed tomography (CT) scanning, she went into cardiac arrest again, and we established veno-arterial extracorporeal membrane oxygenation and performed catheter thrombectomy using a stent retriever. The left basilar pulmonary artery and the right middle pulmonary artery trunk were retrieved after the stent's deployment, and bilateral pulmonary arteries were confirmed to be reopened. A residual thrombus was present, and Monteplase was administered. A contrast-enhanced CT scan taken on day 15 following admission revealed that the thrombus had disappeared, and echocardiography revealed improved right ventricular dysfunction. The patient was transferred to another hospital on day 64 for rehabilitation. We report the first case of pulmonary artery thrombosis that was successfully recanalized by endovascular treatment with a stent retriever. The stent retriever may be useful as an endovascular treatment device for PE because it is easier to achieve recanalization using this method compared to conventional treatment methods.