An ultrasonic orthopaedic surgical device based on a cymbal transducer
An ultrasonic orthopaedic surgical device based on a cymbal transducer
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DOI：
10.1016/j.ultras.2016.07.004
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发表时间：
2016-12-01
期刊：
影响因子：
4.2
通讯作者：
Lucas, Margaret
中科院分区：
文献类型：
--
作者：
Bejarano, Fernando;Feeney, Andrew;Lucas, Margaret
提出了一种超声骨科手术装置，其中超声驱动依赖于对经典钹换能器的修改。所有当前器械均由连接有调谐切割刀片的Langevin超声换能器组成，其中需要共振以提供足够的振动幅度来切割骨。然而，这一要求限制了几何形状，并且几乎没有机会提出简化的装置或复杂的叶片。这里提出V类弯张钹换能器作为新设计的基础，其中钹提供所需的振动幅度，并且可以针对所需的切割量身定制所附接的切割刀片的设计。因此，该设备可以优化以提供准确和精确的切割能力。一个原型装置，基于钹配置和设计操作在25.5 kHz的位移振幅为30 μ m，在300 V的振动和阻抗响应的测量阐明的机械和电气特性的设备。随后在大鼠股骨上进行的切割测试证明了器械性能与基于Langevin的商用超声器械一致，并表明使用更少的电力和更低的压电陶瓷体积即可实现切割。组织学分析显示，Cymbal器械切割部位周围区域的活细胞比例高于电动矢状锯或手动锯，表明超声器械具有更快愈合的潜力。(C)2016年6月，作者。由Elsevier B.V.发布，这是CC BY许可下的开放获取文章。
An ultrasonic orthopaedic surgical device is presented, where the ultrasonic actuation relies on a modification of the classical cymbal transducer. All current devices consist of a Langevin ultrasonic transducer with a tuned cutting blade attached, where resonance is required to provide sufficient vibrational amplitude to cut bone. However, this requirement restricts the geometry and offers little opportunity to propose miniaturised devices or complex blades. The class V flextensional cymbal transducer is proposed here as the basis for a new design, where the cymbal delivers the required vibrational amplitude, and the design of the attached cutting insert can be tailored for the required cut. Consequently, the device can be optimised to deliver an accurate and precise cutting capability. A prototype device is presented, based on the cymbal configuration and designed to operate at 25.5 kHz with a displacement amplitude of 30 mu m at 300 V. Measurements of vibrational and impedance responses elucidate the mechanical and electrical characteristics of the device. Subsequent cutting tests on rat femur demonstrate device performance consistent with a commercial Langevin-based ultrasonic device and show that cutting is achieved using less electrical power and a lower piezoceramic volume. Histological analysis exhibits a higher proportion of live cells in the region around the cut site for the cymbal device than for a powered sagittal or a manual saw, demonstrating the potential for the ultrasonic device to result in faster healing. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.