高载能超声骨刀的优化设计与性能评估

Optimization design and performance evaluation of high-capacity ultrasonic bone scalpel

针对超声骨刀在手术过程中切割效率低和产生骨组织热损伤的问题,设计了具有二级放大结构的高载能超声骨刀。基于驻波理论的等效长度法,结合有限元仿真对其二级放大结构进行设计和优化,测试了其振动性能并进行了骨切割试验。结果表明:具有二级放大结构的超声骨刀的谐振频率为23306 Hz,振幅为140μm,骨切割表面平整且无损伤,满足临床手术需求。

Aiming at the problems of low cutting efficiency of ultrasonic bone scalpel and the generation of thermal damage of bone tissue during surgery,a high-capacity ultrasonic bone scalpel with a secondary amplification structure was designed.Based on the equivalent length method of standing wave theory and finite element simulation,the design and optimization of the secondary amplified structure were carried out,and the vibration performance was tested and the bone cutting test was conducted.The results show that the resonance frequency of the ultrasonic bone scalpel with secondary amplification structure is 23306 Hz,the amplitude is 140μm,and the bone cutting surface is flat and damage-free,which meets the needs of clinical surgery.