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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Ui Yun (Department of Bionanosystem Engineering, Chonbuk National University) Jung, Jinmu (Division of Mechanical Design Engineering, Chonbuk National University) Kwak, Hyo Sung (Department of Radiology, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital) Lee, Dong Hwan (Division of Mechanical Design Engineering, Chonbuk National University) Chung, Gyung Ho (Department of Radiology, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital) Park, Jung Soo (Department of Neurosurgery, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital) Koh, Eun Jeong (Department of Neurosurgery, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제62권 제2호
발행연도
2019.1
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183 - 192 (10page)

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Objective : The objective of this study was to analyze patient-specific blood flow in ruptured aneurysms using obtained non-Newtonian viscosity and to observe associated hemodynamic features and morphological effects. Methods : Five patients with acute subarachnoid hemorrhage caused by ruptured posterior communicating artery aneurysms were included in the study. Patients' blood samples were measured immediately after enrollment. Computational fluid dynamics (CFD) was conducted to evaluate viscosity distributions and wall shear stress (WSS) distributions using a patient-specific geometric model and shear-thinning viscosity properties. Results : Substantial viscosity change was found at the dome of the aneurysms studied when applying non-Newtonian blood viscosity measured at peak-systole and end-diastole. The maximal WSS of the non-Newtonian model on an aneurysm at peak-systole was approximately 16% lower compared to Newtonian fluid, and most of the hemodynamic features of Newtonian flow at the aneurysms were higher, except for minimal WSS value. However, the differences between the Newtonian and non-Newtonian flow were not statistically significant. Rupture point of an aneurysm showed low WSS regardless of Newtonian or non-Newtonian CFD analyses. Conclusion : By using measured non-Newtonian viscosity and geometry on patient-specific CFD analysis, morphologic differences in hemodynamic features, such as changes in whole blood viscosity and WSS, were observed. Therefore, measured non-Newtonian viscosity might be possibly useful to obtain patient-specific hemodynamic and morphologic result.
#Aneurysm #Viscosity #Wall shear stress #Computational fluid dynamics #Non-Newtonian #Newtonian

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참고문헌 (40)

참고문헌 신청
Aroesty J / 1972 / The mathematics of pulsatile flow in small vessels. I. Casson theory / Microvasc Res 4:1~12 google schola Baskurt OK / 2003 / Blood rheology and hemodynamics / Semin Thromb Hemost 29:435~450 google schola Castro MA / 2009 / Hemodynamic patterns of anterior communicating artery aneurysms: a possible association with rupture / AJNR Am J Neuroradiol 30:297~302 google schola Cebral JR / 2005 / Efficient pipeline for image-based patient-specific analysis of cerebral aneurysm hemodynamics: technique and sensitivity / IEEE Trans Med Imaging 24:457~467 google schola Cebral JR / 2005 / Characterization of cerebral aneurysms for assessing risk of rupture by using patient-specific computational hemodynamics models / AJNR Am J Neuroradiol 26:2550~2559 google schola

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