Multi-Objective Optimization of the Ultrasonic Scalpel Rod and Tip with Improved Performance:Vibration Frequency,Amplitude,and Service Life

Jiaqi Zhao ¹Yuhao Zhai ¹Xuzhe Jia ¹Naiwen Deng ¹Kunxu Li ¹Guangchao Han ²Rong Chen ²Dong Wang ³Wei Bai⁴

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作者信息

1. School of Mechanical Engineering and Electronic Information,China University of Geosciences,Wuhan 430074,China
2. School of Mechanical Engineering and Electronic Information,China University of Geosciences,Wuhan 430074,China;Shenzhen Research Institute,China University of Geosciences,Shenzhen 518057,China
3. College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX4 4QF,UK
4. School of Mechanical Engineering and Electronic Information,China University of Geosciences,Wuhan 430074,China;Shenzhen Research Institute,China University of Geosciences,Shenzhen 518057,China;Shenzhen Huazhong University of Science and Technology Research Institute,Shenzhen 518000,China
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Abstract

Ultrasonic scalpel design for minimally invasive surgical procedures is mainly focused on optimizing cutting per-formance.However,an important issue is the low fatigue life of traditional ultrasonic scalpels,which affects their long-term reliability and effectiveness and creates hidden dangers for surgery.In this study,a multi-objective optimal design for the cutting performance and fatigue life of ultrasonic scalpels was proposed using finite element analysis and fatigue simulation.The optimal design parameters of resonance frequency and amplitude were determined.By setting the transition fillet and keeping the gain structure away from the node position to enable the scalpel to have a high service life with excellent cutting performance.The frequency modulation method of setting the vibration node bosses at the node position and setting the vibration antinode grooves at the antinode position was compared.Then,the mechanism of the influence of various design elements,such as tip,shank,node position,and antinode position,on the resonance frequency,amplitude,and fatigue life of the ultrasonic scalpel was analyzed,and the opti-mal design principles of the ultrasonic scalpel were obtained.The proposed ultrasonic scalpel design was con-firmed by simulations,impedance measurements,and liver tissue cutting experiments,demonstrating its feasibility and enhanced performance.This research introduces innovative design strategies to improve the fatigue life and per-formance of ultrasonic scalpels to address an important issue in minimally invasive surgery.

Key words

Multi-objective optimal design/Minimally invasive surgical procedures/Service life/Ultrasonic scalpel

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基金项目

National Natural Science Foundation of China(52005199)

National Natural Science Foundation of China(42241149)

Shenzhen Fundamental Research Program of China(JCYJ20200109150425085)

Shenzhen Fundamental Research Program of China(JCYJ20220818102601004)

Knowledge Innovation Program of Wuhan-Basic Research of China(2022010801010203)

Shenzhen Science and Technology Program of China(JSGG20201103100001004)

Shenzhen Science and Technology Program of China(JSGG20220831105800001)

出版年

2024

中国机械工程学报

中国机械工程学会

中国机械工程学报

CSTPCD

影响因子：0.765

ISSN：1000-9345

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