Investigation of frequency characteristics in cutting of soft tissue using prototype ultrasonic knives
Investigation of frequency characteristics in cutting of soft tissue using prototype ultrasonic knives
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DOI：
10.1143/jjap.46.4793
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发表时间：
2007-07-01
期刊：
影响因子：
--
通讯作者：
Kanai, Hiroshi
中科院分区：
文献类型：
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作者：
Ebina, Kosuke;Hasegawa, Hideyuki;Kanai, Hiroshi
近年来，超声手术刀在各种外科手术中得到了应用。本文主要研究手术刀的操作频率。制作了工作频率分别为24.3、44.3和71.9 kHz的超声刀原型。使用这些刀研究了不同手术频率对软组织影响的差异。频率特性采用两个参数：混凝比和混凝深度。在相同振动速度下，在较低频率下，凝固组织分布较深，且分布在尖端中心周围较窄的区域。对于相同的振动幅值，各频率下的凝固深度相似。此外，还研究了振动速度、压力载荷、尖端与组织接触以及振动方向对组织凝固的影响。从这些研究中发现，机械效应，而不是超声吸收，是组织凝固的主导因素。
Recently, ultrasonic surgical knives have been applied in a variety of surgical operations. In this paper, the operation frequency of a surgical knife is focused on . Prototype ultrasonic knives operated at 24.3, 44.3, and 71.9 kHz were constructed. Differences in the effects on soft tissue depending on the operation frequency were investigated using these knives. Frequency characteristics were measured using two parameters: coagulation ratio and coagulated depth. For the same vibration velocity, at a lower frequency, the distribution of the coagulated tissue was deep and in a narrower region around the center of the tip. For the same vibration amplitude, the coagulated depth at each frequency was similar for all these frequencies. Furthermore, the dependences of tissue coagulation on the vibration velocity, pressure load, contact of the tip with tissue, and direction of vibration were investigated. From these investigations, it was found that the mechanical effect, rather than ultrasound absorption, is the dominant factor in tissue coagulation.