Kiyoshi Kazekawa

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This report describes the successful treatment of cerebral vasospasm after subarachnoid hemorrhage with superselective intra-arterial infusion of papaverine hydrochloride. Thirty-seven vascular territories in 10 patients with symptomatic vasospasm were treated according to the following protocol. Percutaneous transluminal angioplasty was performed in two(More)
We report the usefulness of Guglielmi detachable coil (GDC) embolization by direct carotid puncture for anterior circulation aneurysms. For all 27 patients, GDC embolization by direct carotid puncture was safely performed by using a 5F sheath introducer 5 cm long and a Tracker-38 catheter. Neurologic deficits and hemorrhage were not found in any patient(More)
A case of a rare developmental anomaly of the cervical carotid artery is reported. In this patient the non-bifurcating carotid artery gave origin to all of the branches normally supplied by the external carotid artery and thereafter continued as the internal carotid artery. Embryological events responsible for this anomaly are briefly discussed.
OBJECTIVE The authors report a retrospective analysis of their experience in the endosaccular embolization of internal carotid aneurysms which caused mass effect symptoms of cranial nerves (CN) and review the efficacy and limitations of this technique. METHODS Between April 1997 and August 2002, 12 internal carotid aneurysms that caused mass effect(More)
PURPOSE To study the possibility of using cellulose porous beads (CPBs) as a solid embolic material for the permanent occlusion of blood vessels. METHODS Unilateral renal arteries of 12 adult mongrel dogs were embolized with CPBs. Selective renal angiograms were obtained immediately, 1 hour, 4 weeks, and 12 weeks after the embolization. The dogs were(More)
Hyperperfusion syndrome (HPS) is a rare but severe complication after carotid artery stenting (CAS). Reliable methods for predicting HPS remain to be developed. We aimed to establish a predictive value of hemorrhagic HPS after CAS. Our retrospective study included 136 consecutive patients who had undergone CAS. We determined the cerebral circulation time(More)
PURPOSE Preventing cerebral embolism from debris produced during carotid artery stenting (CAS) is important. This study compared the treatment outcomes of CAS using two types of filter-based embolic protection devices currently in use in Japan. MATERIALS AND METHODS We assessed 121 consecutive cases of CAS performed with FilterWire EZ™ between July 2010(More)
Organic solvents, such as ethanol or dimethyl sulphoxide (DMSO), have been used in liquid embolic agents. To investigate the effects of these solvents on the cerebral blood vessels and cerebral tissue, we subjected Wistar rats weighing 250–300 g to internal carotid artery infusion of 0.2 ml diluted ethanol (10 %, 40 % or 70 %) or anhydrous DMSO (100 %).(More)
Because of its high complication rate, the endovascular treatment (EVT) of anterior communicating artery (ACoA) aneurysms less than 3 mm in maximum diameter remains controversial. We evaluated EVT of tiny ruptured ACoA aneurysms with Guglielmi detachable coils (GDCs). We treated 19 ruptured ACoA aneurysms with a maximum diameter of ≤3 mm with GDCs. The(More)
A 38-year-old man presented with a dissecting aneurysm of the left proximal posterior inferior cerebellar artery (PICA) manifesting as Wallenberg's syndrome. The patient was treated by endovascular occlusion of the aneurysm and parent artery. Immediately after the treatment, the PICA territory was supplied by collateral circulation via the ipsilateral(More)