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Your search keyword '"Rikuo NISHII"' showing total 2 results
Start Over Author "Rikuo NISHII" Topic cerebral angiography
2 results on '"Rikuo NISHII"'

1. Intraorbital Dural Arteriovenous Fistula Treated by Transarterial Embolization Using Onyx: A Case Report.

Author

Yuya Tanaka, Nobuyuki Fukui, Satohiro Kawade, Rikuo Nishii, Yasuhiro Yamamoto, Akina Iwasaki, Yuji Naramoto, Kota Nakajima, Kunimasa Teranishi, Yuki Takano, Tadashi Sunohara, Ryu Fukumitsu, Masanori Goto, Masaomi Koyanagi, Nobuyuki Sakai, and Tsuyoshi Ohta

Subjects
ARTERIOVENOUS fistula, THERAPEUTIC embolization, CEREBRAL angiography, BLINDNESS, HYPEREMIA
Abstract

Objective: Intraorbital dural arteriovenous fistula (IO-dAVF) is a rare condition, and treatment options vary from case to case. We report a case of transarterial embolization (TAE) for IO-dAVF. Case Presentation: A 62-year-old male complained of gradually worsening pain, hyperemia, and visual impairment in the right eye. He did not exhibit diplopia or exophthalmos. Cerebral angiography revealed an arteriovenous fistula in the right orbit. The feeding arteries were the ophthalmic artery (OphA) and the artery of the superior orbital fissure (ASOF), with the superior ophthalmic vein (SOV) as the main draining vein. The venous pathway from the SOV was not clearly visible, and considering the risk of blindness with TAE from the OphA, TAE from the ASOF was performed. Onyx 18 was selected as the liquid embolic material and injected through a microcatheter placed in the internal maxillary artery. Occlusion up to the SOV was achieved, and the shunt flow completely disappeared. Normal blood flow in the OphA was maintained, hyperemia improved, and no complications were observed. Conclusion: In cases of IO-dAVF, when transvenous embolization is difficult to perform, TAE using Onyx from the vessel of the external carotid artery system may be preferred over OphA. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Pipeline flow diversion with adjunctive coil embolization for internal carotid artery aneurysms following an intradural component: results in 46 consecutive aneurysms from a Japanese single-center experience

Author

Tomoaki Akiyama, Hirotoshi Imamura, Masanori Goto, Ryu Fukumitsu, Tadashi Sunohara, Shirabe Matsumoto, Nobuyuki Fukui, Yoshihiro Omura, Tatsumaru Fukuda, Koichi Go, Shinji Kajiura, Masashi Shigeyasu, Kento Asakura, Ryo Horii, Yuji Naramoto, Rikuo Nishii, Yasuhiro Yamamoto, Chiaki Sakai, and Nobuyuki Sakai

Subjects
Carotid Artery Diseases, Intracranial Aneurysm, General Medicine, Aneurysm, Ruptured, Embolization, Therapeutic, Cerebral Angiography, Treatment Outcome, Japan, Humans, Stents, Surgery, Neurology (clinical), Carotid Artery, Internal, Follow-Up Studies, Retrospective Studies
Abstract

In the treatment of an intracranial aneurysm with the flow diverter, the combined use of coil embolization can help promote subsequent progressive thrombosis within the aneurysm sac and reduce the risk of delayed aneurysm rupture. This study retrospectively reviewed outcomes of patients who had undergone the Pipeline Embolization Device (PED) with adjunctive coil embolization (PED/coil) at a single center to determine its safety and efficiency. Patients with internal carotid artery aneurysms following an intradural component were selected for PED/coil between 2015 and 2020. All patients were premedicated with dual antiplatelet therapy of aspirin plus clopidogrel or prasugrel. A minimal number of PEDs were deployed, with coils inserted using a stent-jail technique, avoiding dense packing. A total of 46 aneurysms (43 patients; median dome size, 11.6 mm; median neck width, 6.3 mm) were treated with PED/coil. The median volume embolization ratio was 14.8%. The degree of angiographic filling at the 6-month and latest angiography showed complete occlusion in 60.5% (26/43) and 70.5% (31/44), respectively. Small ( 10 mm) aneurysms achieved a higher complete occlusion rate in the early period; a lower cumulative incidence of aneurysm occlusion was observed in large and giant (≥ 10 mm) aneurysms (P = .024). The median clinical follow-up was 22 months, and no aneurysm ruptures occurred. Favorable clinical outcomes were achieved, with permanent neurological morbidity of 4.7% and no mortality. PED/coil demonstrated a high angiographic occlusion rate at an early stage. Loosely packed coils are sufficient to obliterate aneurysms effectively.

Published
2022

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