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슬립 표면의 심혈관 기기 적용의 혈류역학적 효과의 전산해석
최기은(Kieun Choi),Weiguang Yang,서종민(Jongmin Seo) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
Implanted cardiovascular devices, such as pacemakers, are exposed to the potential risk of thrombosis, which often shortens their lifespan. Previous laboratory studies have demonstrated the effectiveness of slippery surfaces in preventing thrombosis formation on medical devices. However, there is a lack of quantitative understanding of how the slippage effect influences hemodynamics near implanted devices under physiological conditions. In this study, we implemented a slip boundary condition into our solver and validated it by comparing it to an analytical solution using a concentric pipe geometry. We conducted blood flow simulations using a patient-specific anatomical model of the jugular vein with a pacemaker, both with and without slippery surfaces. As a result, we demonstrated that as the slip length increases, the residence time in the region between the blood vessel wall and the pacemaker’s lead decreased by 64.6%. Our results provide computational evidence of the effectiveness of slippery surfaces for thrombosis prevention.
전산유체역학을 이용한 뇌동맥류 내부의 혈류역학 정량분석 및 파열 예측을 위한 모델 수립
이유빈(Yubin Lee),최기은(Kieun Choi),윤원기(Wonki Yoon),서종민(Jongmin Seo) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
An intracranial aneurysm is a cerebrovascular disorder in which weakness in the wall of a cerebral artery causes a localized dilation or ballooning of the blood vessel, often occurring at arterial intersections. Rupture risks of intracranial aneurysms depend on factors like size, location, age. Non-invasive imaging advancements have improved the detection of unruptured aneurysms. Predicting the risk of aneurysm rupture has conventionally relied on the size and aspect ratio of the aneurysm. With the advancement of CFD, Hemodynamic factors like wall shear stress have been crucial in understanding aneurysm development. This study established models of cerebral arteries in 10 patients and conducted CFD simulations to assess morphological and hemodynamic parameters. Further study is needed to analyze and compare hemodynamic factors between the ruptured and control regions within cerebral aneurysms. Ultimately, we aim to identify hemodynamic factors associated with rupture, which can be utilized as indices for predicting future aneurysm ruptures.