J0207-1-4 血栓溶解用曲げ振動カテーテルのエンドエフェクタ設計及び解析([J0207-1]医療・福祉工学のための3次元造形技術(1))

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This paper presents the fundamental study on design of a novel micro stirrer for high effective dissolution of cerebral thrombus or blood clot. The actuator is a beam with fixed one side and the other side is free. Under Ultrasonic longitudinal wave excited by piezo-actuator from fixed side, traveling through beam and before reach to tip of beam amount of them impinges to slanted surface some of the energy of the incident longitudinal wave reflected with orientations different from the length direction. The other energy would be converted to shear waves. Despite the elongation and bending at tip, there is no significant bending across other part of beam. The stirrer was evaluated by vertical tip displacement in varied mode shape with using FEM analysis. The obtained results demonstrated that the vertical motion of the stirrer at desired mode shape was less influenced by the length of actuator.
2010-09-04