Hikaru Wakabayashi

Incidence and Outcomes of Flow Diverter Braid Deformation following Treatment with Non-DFT Wire Devices

Shoko Fujii, Sakyo Hirai, Kyohei Fujita, Hikaru Wakabayashi et autres

Flow diverter braid deformation is occasionally observed after flow diverter placement. However, the frequency and clinical significance of flow diverter braid deformation in non-drawn filled tube wire devices remain unclear. This retrospective, single-center study analyzed 139 consecutive patients (median age, 60 years; …

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Comparison of the Safety and Efficacy between Endovascular Coiling and Surgical Clipping of Posterior Communicating Artery Aneurysms: A 10-year Retrospective Analysis of 851 Aneurysms

Hikaru Wakabayashi, Sakyo Hirai, Tatsuhiko ANZAI, Yohei SATO et autres

Endovascular treatment is widely used for intracranial aneurysms, but evidence comparing endovascular treatment with surgical treatment for posterior communicating artery aneurysms is limited. Using a multicenter registry from January 2013 to December 2022, 841 patients with 851 posterior communicating artery aneurysms were …

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Evaluation of Carotid Plaque Vulnerability Using Dual-energy Computed Tomography Angiography: a Prospective Observational Study

Sakyo Hirai, Takuya Watanabe, Satoru Takahashi, Hiroto Hada et autres

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Scanning Electron Microscopy Identification of Microscopic Onyx Fragments in Blood Aspirated from a Distal Access Catheter after Arteriovenous Malformation Embolization: A Case Report

Satoru Takahashi, Sakyo Hirai, Kyohei Fujita, Shoko Fujii et autres

Objective: Endovascular embolization with Onyx (Medtronic, Minneapolis, MN, USA), a non-adhesive liquid embolic agent, is widely used to treat cerebral arteriovenous malformations (AVMs); however, ischemic complications remain a concern. Although aspiration of blood from a distal access catheter (DAC) after microcatheter retrieval …

Buddy Wire–Supported Distal Access Catheter Advancement Technique (B-DAT) for Difficult Vertebral Artery Access: A Technical Note

Kosuke Umeda, Hikaru Wakabayashi, Shoko Fujii, Satoru Takahashi et autres

Objective: Endovascular treatment (EVT) of posterior circulation lesions can be technically challenging when access to the vertebral artery (VA) is difficult because of tortuosity, stenosis, or a narrow caliber. Stable advancement of the distal access catheter (DAC) is often required for safe …

Effectiveness and Safety of Single Antiplatelet Therapy With Prasugrel in Carotid Artery Stenting

Yuki Kinoshita, Satoru Takahashi, Sakyo Hirai, Kyohei Fujita et autres

Background Dual antiplatelet therapy (DAPT) is used peri-operatively as standard care for patients who undergo carotid artery stenting (CAS). Nonetheless, this regimen is associated with several problems, including ischemic complications due to antiplatelet resistance, as well as hemorrhagic complications. This study investigated …

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Scanning electron microscopy analysis of microcatheter inner lining damage and thrombogenesis in coil embolization

Satoru Takahashi, Sakyo Hirai, Kyohei Fujita, Kim Bongguk et autres

PurposeCoil embolization is a standard treatment for intracranial aneurysms. However, ischemic complications remain a concern, despite advancements in technology and the use of antithrombotic agents. Microcatheter-related thrombogenesis has been identified as a contributing factor to these complications. Although previous studies have focused …

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Delayed detection of in-hospital acute ischemic stroke: The impact of MRI and inpatient departments

Jun Karakama, Sakyo Hirai, Ryoichi Hanazawa, Masataka Yoshimura et autres

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Influence of Elevated Serum Lipoprotein(a) on Carotid Artery Plaque Ulceration in Patients Considered for Carotid Revascularization

Kyohei Fujita, Yuki Kinoshita, Hirotaka Sagawa, Kim Bongguk et autres

AIMS: We aimed to evaluate the effect of serum lipoprotein(a) (Lp(a)) levels on carotid artery ulceration using digital subtraction angiography (DSA), which is the gold standard for assessing atherosclerotic plaque surface morphology. METHODS: Of the consecutive cerebrovascular patients prospectively collected serum Lp(a) …

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Novel artificial intelligence approach in neurointerventional practice: Preliminary findings on filter movement and ischemic lesions in carotid artery stenting

Hirotaka Sagawa, Yuya Sakakura, Ryoichi Hanazawa, Satoru Takahashi et autres

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Sublingual Nitroglycerin Administration before Computed Tomography Angiography for Detection of the Artery of Adamkiewicz in Patients with Spinal Dural Arteriovenous Fistula

Yusuke Kobayashi, Sakyo Hirai, Satoru Takahashi, Kyohei Fujita et autres

Objective: Presurgical identification of the artery of Adamkiewicz (AKA) is crucial in thoracic and lumbar spinal lesions. Although CTA is widely employed to identify AKA, the detection rate varies across reports and is often difficult, especially in patients with spinal dural arteriovenous …

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Safety and Technical Feasibility of Staged Flow Diverter Placement Following Coil Embolization: A Case Series Including Anatomically Challenging Aneurysms

Bongguk Kim, Shoko Fujii, Hirotaka Sagawa, Yuki Kinoshita et autres

Objective: Flow diverter (FD) stents are a promising treatment option for complex intracranial aneurysms. However, rapid hemodynamic changes, thrombus formation, and complex morphologies can increase rupture risk and pose technical challenges. To address these concerns, a "staged treatment" with initial coil embolization …