Energy Dissipation in Ex Vivo Porcine Liver During Electrosurgery.
Energy Dissipation in Ex Vivo Porcine Liver During Electrosurgery.
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DOI：
10.1109/tbme.2016.2595525
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发表时间：
2017-06
期刊：
影响因子：
--
通讯作者：
Borca Tasciuc DA
中科院分区：
文献类型：
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作者：
Karaki W;Akyildiz A;De S;Borca Tasciuc DA
本文探讨了射频电流激励下离体肝组织的能量耗散及其在电外科手术中的应用。单极电极配置的组织表面温度是用红外测温仪测量的。将实验结果拟合到考虑能量储存和传导的瞬态传热有限元模型中，以提取有关“表观”比热的信息，其中包括存储和相变。在低温条件下测定的平均表观比热与公布的数据一致。然而，当温度接近水的沸点时，表观比热增加了五倍，表明汽化通过潜热损失在能量耗散中起着重要作用。
This paper explores energy dissipation in ex-vivo liver tissue during radiofrequency current excitation with application in electrosurgery. Tissue surface temperature for monopolar electrode configuration is measured using infrared thermometry. The experimental results are fitted to a finite element model for transient heat transfer taking into account energy storage and conduction in order to extract information about “apparent” specific heat, which encompasses storage and phase change. The average apparent specific heat determined for low temperatures is in agreement with published data. However, at temperatures approaching the boiling point of water, apparent specific heat increases by a factor of five, indicating that vaporization plays an important role in the energy dissipation through latent heat loss.