Waveform-Dependent Electrosurgical Effects on Soft Hydrated Tissues.
Waveform-Dependent Electrosurgical Effects on Soft Hydrated Tissues.
复制标题
对软水合组织的波形依赖性电外科效应。
DOI：
10.1115/1.4042898
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
De,Suvranu
中科院分区：
文献类型：
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作者：
Karaki,Wafaa;Lopez,CarlosA;Rahul;Borca-Tasciuc,Diana-Andra;De,Suvranu
电外科手术在外科手术中被广泛使用。常用的 功率模式，包括凝结和混合模式，利用非正弦或 调制电流波形。对于相同的功率设置，凝固，混合， 和纯切割模式具有不同的加热和热损伤结果， 含水软组织电导率的频率依赖性。在 在本文中，我们提出了一个软组织的多物理模型来解释 多频电外科手术功率模式在 基于混合物理论的连续介质热力学模型。电气和 频谱由低功率和高功率下的不同功率模式产生 设置已提交。模型预测与体内比较 在猪肝组织上进行电外科加热实验。的准确性 在预测实验观察到的温度分布模型被发现是 当包括频率依赖性时总体上更大。阿克里尼乌斯型模型 表明更多的组织损伤与更大的占空比相关， 多频模式
Electrosurgical procedures are ubiquitously used in surgery. The commonly used power modes, including the coagulation and blend modes, utilize nonsinusoidal or modulated current waveforms. For the same power setting, the coagulation, blend, and pure cutting modes have different heating and thermal damage outcomes due to the frequency dependence of electrical conductivity of soft hydrated tissues. In this paper, we propose a multiphysics model of soft tissues to account for the effects of multifrequency electrosurgical power modes within the framework of a continuum thermomechanical model based on mixture theory. Electrical and frequency spectrum results from different power modes at low- and high-power settings are presented. Model predictions are compared with in vivo electrosurgical heating experiments on porcine liver tissue. The accuracy of the model in predicting experimentally observed temperature profiles is found to be overall greater when frequency-dependence is included. An Arrhenius type model indicates that more tissue damage is correlated with larger duty cycles in multifrequency modes.