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首页> 外文期刊>International journal for numerical methods in biomedical engineering >Thermal and thermal damage responses during switching bipolar radiofrequency ablation employing bipolar needles: A computational study on the effects of different electrode configuration, input voltage and ablation duration
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Thermal and thermal damage responses during switching bipolar radiofrequency ablation employing bipolar needles: A computational study on the effects of different electrode configuration, input voltage and ablation duration

机译：在采用双极针的切换双极射频消融过程中的热和热损伤响应：不同电极配置，输入电压和消融持续时间的计算研究

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摘要

Recent studies have demonstrated the effectiveness of switching bipolar radiofrequency ablation (bRFA) in treating liver cancer. Nevertheless, the clinical use of the treatment remains less common than conventional monopolar RFA-likely due to the lack of understanding of how the tissues respond thermally to the switching effect. The problem is exacerbated by the numerous possible switching combinations when bRFA is performed using bipolar needles, thus making theoretical deduction and experimental studies difficult. This article addresses this issue via computational modelling by examining if significant variation in the treatment outcome exists amongst six different electrode configurations defined by the X-, C-, U-, N-, Z- and O-models. Results indicated that the tissue thermal and thermal damage responses varied depending on the electrode configuration and the operating conditions (input voltage and ablation duration). For a spherical tumour, 30 mm in diameter, complete ablation could not be attained in all configurations with 70 V input voltage and 5 minutes ablation duration. Increasing the input voltage to 90 V enlarged the coagulation zone in the X-model only. With the other configurations, extending the ablation duration to 10 minutes was found to be the better at enlarging the coagulation zone.
机译：最近的研究表明，切换双极射频消融（BRFA）治疗肝癌的有效性。然而，由于缺乏了解组织如何对切换效果响应的理解，可能缺乏治疗的临床使用仍然不如常规单极RFA的常见。当使用双极针头进行BRFA时，这些问题加剧了许多可能的切换组合，从而使理论扣除和实验研究变得困难。本文通过检查在X-，C-，U型，Z-和O型模型定义的六种不同电极配置中存在的六种不同电极配置中存在显着变化，通过检查来解决该问题。结果表明，组织热和热损坏响应根据电极配置和操作条件（输入电压和消融持续时间）而变化。对于球形肿瘤，直径为30mm，所有配置中不能完全消融，其中70 V输入电压和5分钟消融持续时间。将输入电压增加到90 V仅在X模型中扩大了凝固区域。通过其他配置，发现将消融持续时间延伸至10分钟，以较大在扩大凝固区时更好。

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