超声手术刀的工作机理及力负载特性  

The Work Mechanism and Influence of Force Load on Ultrasonic Scalpel

作　　者：曹广凯 姜兴刚[1] 毕培信 秦威[1] 张德远[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《电加工与模具》2016年第1期44-46,58,共4页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51305018;51475031;51475029)

摘　　要：超声手术刀作为一种新型的载能刀具在医学临床应用上取得了广泛应用,但因其超声刀的工作对象是复杂的生物组织,人们对于超声刀的工作机理尚不是很明确,对其负载特性的研究也有限。基于此,从超声手术刀的工作机理和力负载特性两方面进行了研究,发现空化效应在超声刀切割组织时具有重要作用;同时研究了负载力对超声刀工作状态的影响,表明在有载情况下,负载力对超声刀的工作频率影响不大,但随着负载力增大,阻抗圆半径和最大导纳均逐渐变小并趋于恒定,即表现为超声刀的振动效果逐渐受到抑制并趋于稳定。The ultrasonic scalpel has been widely applied in operation as a new tool. But,as the operation objective is comprehensive biological tissue,the work mechanism is still not clear and there is little research on the character of the ultrasonic scalpel applied different force load. Therefore, the work mechanism and the influence of different force load on ultrasonic scalpel are studied by experiment.The result shows that cavitation effect plays an important role on the operation. Meanwhile,the results reveal that with the increase of force, the work frequ.ency of ultrasonic scalpel with load almost does not shift,however both the radius of impedance circle and the maximum value of admittance decrease gradually to keep stable,in other words ,the amplitude of ultrasonic scalpel weakens gradually to constant.

关 键 词：超声手术刀 工作机理 空化效应 力负载特性 

分 类 号：TG663[金属学及工艺—金属切削加工及机床]