Publications by authors named "Chikashi Aoyagi"

The treatment strategy for iatrogenic intracranial vasospasm has not been established. We reported a rare case of stent-retriever use for the treatment of iatrogenic vasospasm after mechanical thrombectomy. The patient presented acute ischemic stroke due to the occlusion of the left middle cerebral artery (MCA).

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Objective: Anterior condylar confluent dural arteriovenous fistula(ACC-dAVF)constitutes 3.7% of the total dAVF cases reported and has been regarded as a rare disease in the past. However, encounters with this disease are increasing due to MRI and awareness of this condition.

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Objective: This report presents 12 consecutively managed patients with aneurysmal subarachnoid hemorrhage (SAH) associated with acute subdural hematoma (ASDH) who underwent decompressive craniectomy (DC) with special attention to their clinical characteristics and surgical outcomes.

Methods: We retrospectively reviewed medical charts, radiologic findings, surgical notes, and video records.

Results: Among these 12 patients (mean age 59.

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Purpose: Decompressive craniectomy for traumatic brain injury patients has been shown to reduce intracranial hypertension, while it often results in increased brain edema and/or contralateral space-occupied hematoma. The purpose of this study was to determine the prognosis of bilateral decompressive craniectomy in severe head injury patients with the development of either bilateral or contralateral lesions after ipsilateral decompressive craniectomy.

Methods: Twelve patients underwent bilateral decompressive craniectomy among 217 individuals who had been treated with decompressive craniectomy with dural expansion from September 1995 to August 2006.

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Acute epidural hematomas (AEDH) are generally managed with rapid surgical hematoma evacuation and bleeding control. However, the surgical outcome of patients with serious brain edema is poor. This study reviewed the clinical outcome for AEDH patients and evaluated the efficacy of the DC, especially in patients with associated massive brain swelling.

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Acute subdural hematoma (ASDH) patients presenting in a severe condition tend to have poor outcomes due to the significant brain edema required to maintain the ICP at less than 20-25 mmHg. This study compared the surgical outcomes of 16 critically ill patients with ASDH who underwent hematoma irrigation with trephination therapy (HITT) based on their initial ICP values. The initial mean GCS score upon admission was four.

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A rare case of a traumatic middle meningeal arteriovenous fistula on the side of the head opposite to the injured side was reported. A 21-year-old man was admitted to our hospital after a traffic accident in which the right side of his head was hit. CT scans and MR images on admission showed a right temporal bone fracture, traumatic subarachnoid hemorrhage, and a left frontal lobe contusion.

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A rare case of meningitis complicated by brainstem infarction is reported. A 64-year-old previously healthy female was admitted to our hospital because of a 1-week history of fever and headache. Cefdinir was orally administered for several days before admission.

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Ruptured aneurysms located at the non-branching sites of the internal carotid artery, including blister-like aneurysms, possess unique clinical and technical features. This report presents nine consecutively managed patients with these types of aneurysm, detailing the clinical and radiological characteristics and surgical outcomes. The initial angiography identified aneurysmal lesions in six of the nine patients with two of these patients requiring additional three-dimensional (3D) angiography.

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Optimal surgical management of ruptured aneurysms of the distal anterior cerebral artery continues to provide unique technical challenges. This study presents 20 consecutively managed such patients, with special attention given to the clinical and radiological characteristics, as well as the surgical outcomes. Intracerebral hematoma was seen in 11 of the 20 patients, and intraventricular hemorrhage occurred in 4 (20%).

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Background: Patients with poor-grade aneurysmal subarachnoid hemorrhage (SAH) presenting with large intracerebral (ICH) or sylvian hematomas (SylH) have poor outcomes due to the mass effect of significant brain stem compression following mass effect. On the other hand, decompressive craniectomy (DC) can reduce morbidity and mortality in critically ill patients with massive ischemic infarction and severe head injury. However, the role of DC in SAH patients is not fully understood.

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We would like to report a rare case of a venous angioma with a chronic encapsulated hematoma, in a 31-year-old woman who was admitted to our hospital in November, 2005. Her neurological examination was noted to be normal. A CT was performed which showed an isodense mass in the left cerebellar hemisphere.

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