Embolization of cerebral aneurysms with a liquid embolus,EVAL mixture: Report of three cases |
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Authors: | S Nishi MD W Taki I Nakahara K Yamashita A Sadatoh H Kikuchi H Hondo K Matsumoto H Iwata Y Shimada |
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Institution: | (1) Department of Neurosurgery, Faculty of Medicine, Kyoto University, Kyoto;(2) Department of Neurosurgery, Faculty of Medicine, Tokushima University, Tokushima;(3) Department of Experimental Medicine, National Cardiovascular Centre, Osaka;(4) 2nd Department of Pathology, School of Medicine, Kyoto University, Kyoto, Japan;(5) Department of Neurosurgery, Cardiovascular Centre, 5-7-1, Fujishirodai, Suita, 565 Osaka, Japan |
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Abstract: | Summary Embolization of three surgically difficult cerebral aneurysms was performed using our newly developed non-adhesive embolic material, EVAL mixture (ethylene vinyl alcohol copolymer). Conventional embolic materials such as detachable balloons or microcoils were not used because of a large or irregular aneurysmal neck. After temporary occlusion of the parent artery with a superselective balloon catheter, the EVAL mixture was slowly injected through a microcatheter placed in the aneurysm or parent artery. The locations of the aneurysms were anterior communicating artery, basilar artery-posterior cerebral artery and basilar artery-anterior inferior cerebellar artery (BA-AICA). One aneurysmal occlusion and 2 parent artery occlusions were performed. Patients had no persistent deficits. The patient with the BA-AICA aneurysm associated with an arteriovenous malformation died of rupture of the residual AVM due to haemodynamic change 2 weeks after embolization. In selected and limited cases, embolization of surgically difficult cerebral aneurysms using EVAL mixture was more effective and safer than embolization using conventional embolic materials such as balloons and microcoils. |
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Keywords: | Cerebral aneurysm endovascular surgery EVAL mixture liquid embolus |
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