Analysis and Structure Optimization of Scissor-Type Micro-Stirrer with the Most Effective Output Performance for Thrombus Dissolution in Interventional Therapy

Compared with thrombus dissolution using only thrombolytic agents, an advanced therapy of direct stirring the blood clot can yield shorter recanalization time and higher velocity. Our previous research presented design a novel micro-stirrer, which convert longitudinal vibration into transverse eventually generate opposite at end-effort, like scissor, for efficient acceleration. Transverse is most effective movement to dissolve thrombi. However, small size vessels has strict limits, will greatly affect output vibration. Therefore, improve performance micro-stirrer in curved narrow vascular spaces, analysis structure optimization expected increase mode conversion efficiency from mode. The concept theoretical are detail. Aiming obtain optimal parameters mathematical model established analyzed. Next, series finite element models involving important designed investigated. Finally, obtained, effect vessel verified by simulation experiment.