Ultrasonic Cutting Device for Bone Surgery Based on a Cymbal Transducer
Ultrasonic Cutting Device for Bone Surgery Based on a Cymbal Transducer
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基于Cymbal换能器的骨外科超声切割装置
DOI：
10.1016/j.phpro.2015.03.020
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Bejarano F
中科院分区：
文献类型：
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作者：
Bejarano F
在这项研究中，我们介绍了一种用于骨手术的新型超声切割装置，该装置基于V类伸缩式Cymbal换能器，配置用于功率超声应用，消除了朗之万基换能器切割尖端的许多几何限制。采用Cymbal换能器的好处是，由于切割刀片本身不必进行调整，刀片设计可以更紧密地集中于提供与骨骼的最佳交互作用，以提供高度精确的切割。叶片几何形状的微小变化不会影响最终的共振频率。此外，超声波设备还可以被微型化，以允许设计用于涉及微创手术的精细矫形手术的设备。结果表明，单个压电盘驱动的Cymbal换能器可以在较低的驱动电压下激发出足够高的振动位移幅值。实现这一点的方法是，通过调整Cymbal的结构以消除环氧层脱粘的问题，并通过支持实验振动特性的有限元建模来优化Cumbal端盖和几何结构。由此产生的超声波骨切割器原型的初步特征说明了这种新型装置设计的成功，该装置的工作频率约为25千赫。
In this study, we introduce a new prototype ultrasonic cutting device for bone surgery based on a class V flextensional cymbal transducer, configured for use in power ultrasonics applications, which removes many of the geometrical restrictions on the cutting tip of Langevin-based transducers. The benefit of incorporating a cymbal transducer is that since the cutting blade itself does not have to be tuned, blade design can focus more closely on delivering the best interaction with bone to provide a highly accurate cut. Small variations to the geometry of the blade do not affect the final resonance frequency. Also the ultrasonic device can be miniaturised to allow the design of devices for delicate orthopaedic procedures involving minimal-access surgery. The results show how the cymbal transducer, driven by a single piezoceramic disc, can excite sufficiently high vibration displacement amplitudes at lower driving voltages. This is achieved by adapting the configuration of the cymbal to remove the problem of epoxy layer debonding, and by optimising the cymbal end-cap and geometry through finite element modelling supported with experimental vibration characterisation. Preliminary characterisations of the resulting prototype ultrasonic bone cutting device, which operates at around 25 kHz, illustrate the success of this novel device design.