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중대뇌동맥류 결찰술에서 총경동맥의 일시적 결찰에 따른 동맥류 및 주요 동맥들의 혈류역학적 시뮬레이션
류상원(Sangwon Ryu),장경민(Kyoung-Min Jang),남택균(Taek-Kyun Nam),유재영(Jaiyoung Ryu) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
Intracranial aneurysm refers to a disease in which the blood vessel wall, especially at the branching points of arteries within the brain, weakens and abnormally balloons out. In severe cases, when aneurysm ruptures, it can lead to subarachnoid hemorrhage, resulting in a high mortality rate. In this study, we investigated a surgical approach to reduce the diameter of the common carotid artery (CCA) on the side where the middle cerebral artery aneurysm had occurred for safe clipping. The results showed that as the diameter of the internal carotid artery was reduced, the internal pressure within the aneurysm decreased. When the diameter was reduced to 95%, the internal pressure within the aneurysm decreased by approximately 50% based on the Mean Arterial Pressure (MAP). Additionally, as the diameter of the common carotid artery decreased, there was increase in cerebral blood flow through the circle of willis leading to high Wall Shear Stress (WSS) in the anterior cerebral artery and middle cerebral artery.
정상 간기능을 보이는 발프로산 유발 고암모니아혈증성 뇌병증 1예
최종학 ( Jong Hak Choi ),김정은 ( Jung Eun Kim ),이광선 ( Kwang Sun Lee ),허채 ( Chae Heo ),남택균 ( Taek Kyun Nam ),김정욱 ( Jeong Wook Kim ),박승원 ( Seung Won Park ) 대한내과학회 2008 대한내과학회지 Vol.75 No.6
Valproic acid is an effective anticonvulsant used in neurology and psychiatry. Valproic acid-induced hyperammonemic encephalopathy is an unusual complication characterized by a decreasing level of consciousness, the development of progressive confusional states and, sometimes, a coexisting increase in the frequency of seizures after the onset of valproic acid treatment. It can lead to death, but can be reversed if a swift diagnosis is made. We report the case of a 58-year-old woman with an intracerebral hemorrhage and normal liver function who presented with valproic acid-induced hyperammonemic encephalopathy. After valproic acid treatment, she developed encephalopathy and became comatose, with seizures and a markedly elevated serum ammonia level. Her neurologic manifestations and hyperammonemia improved after discontinuing the valproic acid. (Korean J Med 75:680-684, 2008)