Details of a Researcher - WAKASA Ryosei

Identifying the appropriate measurement environment for laser speckle flowmetry of cerebral blood flow in rats

若狹　良成

Brain Research, 1 2025 Mar 1; 1850:149443 2025.09 [Refereed]

Domestic Co-author

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Carotid Endarterectomy with Intraoperative Ultrasonography for Radiation-induced Carotid Stenosis: A Case Report

WAKASA Ryosei, OKUBO Atsuya, SATO Wakana, SHIMIZU Hiroaki

Surgery for Cerebral Stroke ( The Japanese Society on Surgery for Cerebral Stroke ) 50 ( 4 ) 286 - 290 2022

<p>The surgical treatment of radiation-induced carotid stenosis is controversial. Here we report a case of carotid endarterectomy (CEA). A 70-year old man with a history of radiotherapy for pharyngeal cancer 20 years prior was admitted with sporadic infarctions in the right cerebral hemisphere. Magnetic resonance angiography (MRA) and subsequent angiography demonstrated 75% stenosis of the right common carotid artery (CCA). Plaque images showed vulnerable plaques extending from the proximal CCA to the carotid bifurcation. The plaque was diagnosed as a radiation-induced lesion; however, its volume was too large for carotid artery stenting. The patient underwent CEA under intraoperative ultrasonography guidance to ensure a site of carotid clamping with less plaque content. The carotid arteries were dissected as usual. The plaque was muddy and protruded upon the carotid incision, but dissection from the media was also as usual. The patient's postoperative course was uneventful with no neurological deficits and resolution of the right carotid stenosis; however, he died of multiple organ failure 3 months later. The authors concluded that radiation-induced carotid stenosis may be treated with CEA when a plaque is large and vulnerable.</p>

DOI CiNii Research

Rapid <i>de novo</i> Formation of a Large Aneurysm in a Patient with Fibromuscular Dysplasia

Journal of Neuroendovascular Therapy ( The Japanese Society for Neuroendovascular Therapy ) 14 ( 2 ) 69 - 75 2020

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