基于刀头温度估算的组织自适应控制技术在超声刀中的应用  

Application of Tissue Adaptive Control Technology Based on Tool Head Temperature Estimation in Ultrasonic Knife

作　　者：刘雨佳 马佳临 余嘉 曹大为 LIU Yujia;MA Jialin;YU Jia;CAO Dawei(Department of Medical Engineering,Beijing Tiantan Hospital Affiliated to Capital Medical University,Beijing 100070,China;Wuxi Sowits Medical Technology Co.,Ltd.,Wuxi Jiangsu 214142,China)

机构地区：[1]首都医科大学附属北京天坛医院医学工程处,北京100070 [2]无锡硕慧医疗科技有限公司,江苏无锡214142

出　　处：《中国医疗设备》2025年第3期35-40,63,共7页China Medical Devices

摘　　要：目的研究一种效果能够对标美国强生组织自适应控制功能的全新技术,以提升国产超声刀的性能水平。方法通过分析影响超声刀杆和换能器组成的机电系统谐振频率的因素,设计一种观测谐振频率变化的方法,从而通过大量的测试数据拟合出一组以谐振频率变化量为主要参数的数学公式,用于估算刀头温度;再通过提出基于估算的刀头温度对超声刀输出进行调节的方法,实现组织自适应控制功能。结果通过热仿真证实了刀头工作时温升被限制在刀头局部,同时验证了在刀头切割模拟组织时谐振频率变化的再现性良好。在国产超声主机上应用基于谐振频率变化的温度估算算法,其估算的刀头温度与实际刀头温度差异小于±10℃。最后,经过动物试验验证,本研究提出的组织自适应控制方法临床效果与美国强生GEN11CN超声刀主机在切割闭合效率和软组织热损伤距离方面差异无统计学意义(P>0.05)。结论基于刀头温度估算的组织自适应控制方法具有实际应用价值,可提升国产超声刀的技术水平,缩短与国际一流产品的差距。Objective To study a new technology with the effect of benchmarking the tissue adaptive control function of American Johnson&Johnson in order to improve the performance level of domestic ultrasonic knives.Methods By analyzing the factors affecting the resonant frequency of the electromechanical system composed of ultrasonic tool bar and transducer,a method was designed to observe the resonant frequency change,and a set of mathematical formula with the resonant frequency change as the main parameter was fitted through a large number of test data,which was used to estimate the tool head temperature.Then a method of adjusting the output of ultrasonic knife based on estimated cutter head temperature was proposed to realize the tissue adaptive control function.Results It was proved by thermal simulation that the temperature rise was limited to the part of the cutter head,and the reproducibility of resonant frequency change when the cutter head cuts the simulated tissue was good.The temperature estimation algorithm based on resonant frequency change was applied to a domestic ultrasonic host,and the difference between the estimated tool head temperature and the actual tool head temperature was less than±10℃.Finally,animal experiments verified that clinical effect of the tissue adaptive control method proposed in this study had no statistical significance compared with that of American Johnson&Johnson GEN11CN ultrasonic knife host in terms of cutting closure efficiency and soft tissue thermal damage distance(P>0.05).Conclusion The tissue adaptive control method based on tool head temperature estimation has practical application value,which can improve the technical level of domestic ultrasonic knives and shorten the gap with international first-class products.

关 键 词：超声刀 组织自适应控制功能 谐振频率 温度估算 切割闭合效率 热损伤 

分 类 号：R197.39[医药卫生—卫生事业管理] R608[医药卫生—公共卫生与预防医学]