G. Hyoutani

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We report results and problems of the endovascular treatment in 12 cases of intradural vertebral dissecting aneurysm presenting with subarachnoid hemorrhage. There were four complications related to interventional procedure and conventional angiography. In three patients (25%), VDAs ruptured immediately after injection of contrast media or hypertension(More)
SUMMARY 110 patients with extracranial ICA stenosis were treated by PTA or stenting. In 21 of 55 cases of only PTA and in 40 of 55 cases of stenting, we used our blocking balloon systems to prevent distal embolism. The morbidity and the mortality rates were 5.4% and 0%, respectively. There was only one embolic complication in cases of PTA or stenting where(More)
The vascular permeability of 50 brain tumors of various kinds was examined by means of dynamic CT. The degree of the vascular permeability within the tumor was evaluated according to the theoretical basis that the regression of the time-density curve after the peak to the base line became less in accord with the increase in vascular permeability. The(More)
Hemorrhagic infarction after vasospasm is a rare condition in patients with aneurysmal subarachnoid hemorrhage (SAH). Induced hypertensive therapy is used for patients with vasospasm, but this treatment has a risk of inducing hemorrhagic infarction. A total of 221 patients whose first computed tomographic (CT) scans were examined within 2 weeks after SAH(More)
SUMMARY We treated 7 cases of dural arteriovenous fistulas (dAVF) with isolated sinus by transvenous direct embolization. The fistulas located in the transverse-sigmoid sinus in 5 cases, superior sagittal sinus in 1 case and transverse-sigmoid and superior sagittal sinus in 1 case. The initial symptoms were generalized convulsion in 2 cases, disturbed(More)
16th Annual Meeting of the Japanese Neuroradiological Society* Tokyo, 27-28 February, 1987 Special Lecture: 1. Professor Dr. reed. Hans-Joachim Kxetschmann, Hannover, FRG "Neuroanatomy and Neuroimaging" 2. Professor Dr. reed. Wolfgang Weinrich, Hannover, FRG "Neurological Dysfunction and Neuroimaging" I A-I, Investigation of crossed cerebellar diaschisis by(More)
SUMMARY Total 89 patients with cervical ICA stenosis were treated by stenting. In 74 cases of stenting, we used our blocking balloon systems to prevent distal embolism. The morbidity and the mortality rate was 4.5% and 0%, respectively.Two(3%) of 74 cases showed distal embolism when blocking balloon catheter systems(BBCS) were used, while distal embolism(More)
SUMMARY Nineteen patients with intracranial aneurysm were treated using electrically detachable coils (GDC or IEDC) and angiographic results and complications were assessed. In 18 aneurysms treated by endosaccular occlusion, 11 (61%), 3 (17%) and 4 (22%) resulted in complete occlusion, neck remnant and dome filling, respectively. Neither haemorrhagic nor(More)
SUMMARY Eighteen patients with intracranial vertebrobasilar stenosis and occlusion were treated by PTA or stenting. In 11 of 18 cases, only PTA was performed and in seven of 18 cases, we used stents. The mean stenosis before and after PTA/stenting was 82.8% and 22.3%, respectively. In 11 cases of PTA only, the stenotic rate decreased from 81.8% to 29.6%,(More)