Kohji Yamaguchi

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BACKGROUND Although many studies of postoperative cerebral hyperperfusion syndrome (CHS) after carotid endarterectomy have been reported, there are few reports related to extracranial-intracranial (EC-IC) bypass for atherosclerotic occlusive cerebrovascular diseases. OBJECTIVE To examine the incidence of cerebral hyperperfusion and CHS after EC-IC bypass(More)
BACKGROUND Although some patients with moyamoya disease need revascularization in the anterior cerebral artery (ACA) territory, there are few reports on direct bypass in the ACA territory because of the difficult surgical technique. OBJECTIVE To report our technical strategy for superficial temporal artery (STA)-ACA bypass. METHODS We performed(More)
Moyamoya disease (MMD) and atherosclerotic cerebrovascular disease (ACVD) differ in angiographic appearance and probably hemodynamics. Pediatric MMD (PMMD) usually presents with cerebral ischemia, while intracranial hemorrhage is more common in adult MMD (AMMD), suggesting differences in cerebral hemodynamics. We analyzed the cortical flow velocity and(More)
OBJECTIVE We designed a new irrigation-suction system consisting mainly of a pressure-resistant irrigation fluid container, dual irrigation and suction devices, and an intracontainer pressure regulator. METHODS The intracontainer pressure can be regulated from 0 to 0.02 MPa. This system is simple and can be operated simultaneously by both an operator and(More)
OBJECTIVE Cerebral hyperperfusion syndrome is a major complication after carotid endarterectomy (CEA). We investigated whether our strategy of minimizing intraoperative cerebral ischemia and strict postoperative blood pressure control under continuous sedation prevented postoperative hyperperfusion. METHODS Eighty consecutive patients undergoing CEA were(More)
A 38-year-old male presented with a meningioma within the internal auditory canal (IAC) manifesting as rapidly progressive hearing loss over a period of one month. He had a 2-year history of tinnitus. Magnetic resonance imaging revealed a 10-mm intracanalicular tumor, which was surgically resected by a retrosigmoid lateral suboccipital approach. The(More)
In order to assess the characteristics of brain swelling due to infarction, 322 angiograms in patients with cerebral infarction have been reviewed. The rate of incidence of swelling related to time from onset, sequential angiographic changes, and factors contributing to the phenomenon are presented. Some clinical and differential diagnostic aspects are(More)
OBJECT Some patients with moyamoya disease complain of severe headache, which may be closely related to cerebral ischemia. The efficacy of superficial temporal artery-middle cerebral artery (STA-MCA) anastomosis in these patients was evaluated by clinicoradiological studies. METHODS Of 117 consecutive patients with ischemic moyamoya disease, 25 complained(More)
We investigated whether postoperative hyperperfusion in moyamoya disease can be predicted using intraoperative laser Doppler flowmetry and/or thermography. A prospective study was conducted on 27 patients (39 hemispheres) with moyamoya disease who underwent superficial temporal artery-middle cerebral artery (STA-MCA) bypass. During surgery, regional(More)
OBJECTIVE For patients with internal carotid artery occlusion with advanced narrowing of the ipsilateral external carotid artery (ECA), we performed preventive carotid endarterectomy (CEA) for the ECA stenosis before superficial temporal artery (STA) to middle cerebral artery (MCA) anastomosis for internal carotid artery occlusion. METHODS Between August(More)