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椎体模型内模拟注射PMMA的流动及分布规律
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【西药学科研论文】【关键词】 椎体成形术;聚甲基异丁烯酸;多孔介质;椎体模型Law of PMMA flowing and distributing in the vertebra by computer modeling 【Abstract】AIM: To investigate the law that PMMA (polymethylmethacrylate) flows and distributes in the vertebra so as to lay the operational theoretical foundation for the clinical work of percutaneous vertebroplasty. METHODS: Based on the structural characteristics and parameters of the healthy adult vertebra,a vertebral model of porous media was made by the computer software and the law that silicone oil with a viscosity matching that of PMMA flew and distributed in the model was calculated and analyzed by means of hydrodynamics and numeric modeling. RESULTS: The silicone oil distributed in a circlelike shape on each plane in the vertebral model,and the largest amount was on the planes through the injection point.The volume fraction of the silicone
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