Understanding nonlinear vibration behaviours in high-power ultrasonic surgical devices.
Understanding nonlinear vibration behaviours in high-power ultrasonic surgical devices.
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DOI：
10.1098/rspa.2014.0906
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发表时间：
2015-04-08
期刊：
影响因子：
--
通讯作者：
Lucas M
中科院分区：
文献类型：
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作者：
Mathieson A;Cardoni A;Cerisola N;Lucas M
超声波手术设备越来越多地用于口腔、颅面和颌面外科手术来切割矿化组织，为外科医生提供高精度，同时将神经和血管组织的风险降至最低。功率超声波器件以谐振方式工作，要求其长度为半波长或半波长的倍数。对于骨外科手术，基于半波长的设备已经取得了相当大的成功，但最近提出了更长的多半波长内窥镜设备以扩大手术范围。为了为这些发展提供背景，介绍了一些外科手术示例和超声波切割头的相关设计。然而，内窥镜设备中典型的多个半波长组件更有可能表现出非线性动态行为，这对设备性能产生非常不利的影响。通过内窥镜设备动态行为的实验表征，证明了几何特征如何影响非线性动态响应。周期倍增是一种已知的混沌行为途径，它受到切削尖端形状的显着影响，而切削尖端对类达芬响应只有有限的影响，特别是对器件稳定性很重要的滞后曲线的形状。这些发现支撑了设计，旨在为新一代超声内窥镜手术设备铺平道路。
Ultrasonic surgical devices are increasingly used in oral, craniofacial and maxillofacial surgery to cut mineralized tissue, offering the surgeon high accuracy with minimal risk to nerve and vessel tissue. Power ultrasonic devices operate in resonance, requiring their length to be a half-wavelength or multiple-half-wavelength. For bone surgery, devices based on a half-wavelength have seen considerable success, but longer multiple-half-wavelength endoscopic devices have recently been proposed to widen the range of surgeries. To provide context for these developments, some examples of surgical procedures and the associated designs of ultrasonic cutting tips are presented. However, multiple-half-wavelength components, typical of endoscopic devices, have greater potential to exhibit nonlinear dynamic behaviours that have a highly detrimental effect on device performance. Through experimental characterization of the dynamic behaviour of endoscopic devices, it is demonstrated how geometrical features influence nonlinear dynamic responses. Period doubling, a known route to chaotic behaviour, is shown to be significantly influenced by the cutting tip shape, whereas the cutting tip has only a limited effect on Duffing-like responses, particularly the shape of the hysteresis curve, which is important for device stability. These findings underpin design, aiming to pave the way for a new generation of ultrasonic endoscopic surgical devices.