Background The transradial approach (TRA) for mechanical thrombectomy (MT) for acute ischemic stroke has been limited by the size of catheters usable in the radial artery, with the smaller access site precluding balloon-guide catheter (BGC) use. However, promising results have been reported for a TRA with a sheathless BGC (sTRA). We sought to perform a comparative study of MT with a BGC via the sTRA versus the transfemoral approach (TFA).
Methods A retrospective review of our MT database was conducted. Baseline, procedure-related, and outcome data were compared for patients aged ≥18 years with anterior circulation large vessel occlusion, Alberta Stroke Program Early CT Score ≥6, and prestroke modified Rankin Scale score ≤2 treated with either approach.
Results Ninety-three consecutive patients (34 sTRA and 59 TFA) were included. Both groups had similar demographics, comorbidities, stroke severity, intravenous alteplase use, and occlusion location. Mean time from puncture to final recanalization was faster in the sTRA group (29 vs 36 min, p=0.059) despite a higher access site crossover rate in the sTRA group (11.8% vs 0%, p=0.016). There were no differences between groups regarding last modified Thombolysis in Cerebral Infarction score; first-pass or modified first-pass effect; time from last known well to puncture; use of stent-retriever, aspiration, or combination first approach; number of passes; symptomatic intracranial hemorrhage; hospital stay; 90-day functional independence; and mortality. National Institutes of Health Scale score and modified first-pass effect were the only independent predictors of poor outcomes.
Conclusions Comparable patients treated with MT via the sTRA or TFA had similar angiographic and clinical outcomes.
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Contributors Conception and design: MW, AM, JMC, EIL, JMD. Acquisition of data: All authors. Analysis and interpretation of data: All authors. Drafting the manuscript: AM, MW, JMD. Critically revising the manuscript: All authors. Reviewing submitted version of manuscript: All authors.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests MW, AM, MDK, FA, SBH, JL, and RHD: None. JMC: Consulting Fees: Cerenovus, J&J Medical Device Companies; Integra Lifesciences; MIVI Neuroscience; Penumbra; Stryker. Support for attending meetings and/or travel: Stryker; Penumbra. KVS: Consulting Fees: Boston Scientific, Canon Medical Systems USA, MicroVention, Medtronic, Stryker Neurovascular. Payment or honoraria for lectures, presentations, speakers’ bureaus, manuscript writing, or educational event: Canon Medical Systems USA. Stock or stock options: Boston Scientific, Access Closure, Niagara Gorge Medical. JMD: Consulting fees; payment or honoraria for lectures, presentations, speakers’ bureaus, manuscript writing, or educational events: Medtronic, Rapid Medical. Support for attending meetings and/or travel: Medtronic, Rapid Medical. Patents planned, issued, or pending: QAS.ai; Participation on a Data Safety Monitoring Board or Advisory Board: NIH NIHDS Strokenet. Stock or stock options: Synchron, Cerebrotech, QAS.ai. AHS: Consulting fees: Amnis Therapeutics, Apellis Pharmaceuticals, Boston Scientific, Canon Medical Systems USA, Cardinal Health 200, Cerebrotech Medical Systems, Cerenovus, Cerevatech Medical, Cordis, Corindus., Endostream Medical, Imperative Care, Integra, IRRAS AB, Medtronic, MicroVention, Minnetronix Neuro, Penumbra, Q’Apel Medical, Rapid Medical, Serenity Medical, Silk Road Medical, StimMed, Stryker Neurovascular, Three Rivers Medical, VasSol, Viz.ai, W.L. Gore & Associates. Leadership or fiduciary role in other board, society, committee or advocacy group: Secretary of the Board of the Society of NeuroInterventional Surgery, Chair of the Cerebrovascular Section of the AANS/CNS. Stock or stock options: Adona Medical, Amnis Therapeutics, Bend IT Technologies, BlinkTBI, Buffalo Technology Partners, Cardinal Consultants, Cerebrotech Medical Systems, Cerevatech Medical, Cognition Medical, CVAID, E8, Endostream Medical, Imperative Care, Instylla, International Medical Distribution Partners, Launch NY, NeuroRadial Technologies, Neurotechnology Investors, Neurovascular Diagnostics, PerFlow Medical, Q’Apel Medical, QAS.ai, Radical Catheter Technologies, Rebound Therapeutics (purchased 2019 by Integra Lifesciences), Rist Neurovascular, (purchased 2020 by Medtronic), Sense Diagnostics, Serenity Medical, Silk Road Medical, Adona Medical, Amnis Therapeutics, Bend IT Technologies, BlinkTBI, Buffalo Technology Partners, Cardinal Consultants, Cerebrotech Medical Systems, Cerevatech Medical, Cognition Medical, CVAID, E8, Endostream Medical, Imperative Care, Instylla, International Medical Distribution Partners, Launch NY, NeuroRadial Technologies, Neurotechnology Investors, Neurovascular Diagnostics, PerFlow Medical, Q’Apel Medical, QAS.ai, Radical Catheter Technologies, Rebound Therapeutics (purchased 2019 by Integra Lifesciencesp), Rist Neurovascular (purchased 2020 by Medtronic), Sense Diagnostics, Serenity Medical, Silk Road Medical, SongBird Therapy, Spinnaker Medical, StimMed, Synchron, Three Rivers Medical, Truvic Medical, Tulavi Therapeutics, Vastrax, VICIS, Viseon. Other financial or non-financial interests: National PI/Steering Committees: Cerenovus EXCELLENT and ARISE II Trial; Medtronic SWIFT PRIME, VANTAGE, EMBOLISE and SWIFT DIRECT Trials; MicroVention FRED Trial and CONFIDENCE Study; MUSC POSITIVE Trial; Penumbra 3D Separator Trial, COMPASS Trial, INVEST Trial, MIVI neuroscience EVAQ Trial; Rapid Medical SUCCESS Trial; InspireMD C-GUARDIANS IDE Pivotal Trial. EIL: Shareholder/Ownership Interest: NeXtGen Biologics, RAPID Medical, Claret Medical, Cognition Medical, Imperative Care, Rebound Therapeutics, StimMed, Three Rivers Medical; Patent: Bone Scalpel; Honorarium for Training & Lectures: Medtronic, Penumbra, MicroVention, Integra. Consultant: Clarion, GLG Consulting, Guidepoint Global, Imperative Care, Medtronic, StimMed, Misionix, Mosiac; Chief Medical Officer: Haniva Technology; National PI: Medtronic; Steering Committees for SWIFT Prime and SWIFT Direct Trials; Site PI Study: MicroVention (CONFIDENCE Study) Medtronic (STRATIS Study-Sub 1); Advisory Board: Stryker (AIS Clinical Advisory Board), NeXtGen Biologics, MEDX, Cognition Medical; Endostream Medical, IRRAS AB (Consultant/Advisory Board, Medical Legal Review: render medical/legal opinions as an expert witness; leadership or fiduciary roles in other board society, committee or advocacy group, paid and unpaid: CNS, ABNS, UBNS.
Provenance and peer review Not commissioned; externally peer reviewed.
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