Comparison of ablation performance between dual internally cooled wet tip and conventional dual internally cooled tip radiofrequency electrodes: an experimental study in ex vivo bovine liver,International Journal of Hyperthermia

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Comparison of ablation performance between dual internally cooled wet tip and conventional dual internally cooled tip radiofrequency electrodes: an experimental study in ex vivo bovine liver
International Journal of Hyperthermia ( IF 3.1 ) Pub Date : 2021-02-25 , DOI: 10.1080/02656736.2021.1876255
Dong Ik Cha ₁ , Min Woo Lee _{1,

2} , Woo Kyoung Jeong _{1,

2} , Sang Yun Ha ₃ , Soo Hyun Ahn ₄ , Hyunchul Rhim _{1,

2} , Hyo Keun Lim _{1,

2}

Affiliation

Abstract

Objective

To evaluate the performance of dual internally cooled wet tip (ICWT) radiofrequency electrodes in comparison to dual internally cooled tip (ICT) electrodes.

Methods

Twenty ablation zones were created for each type of electrodes. Planned procedure time was 6 min. Diameters of the ablation zone along the x-, y-, and z-axes (Dx, Dy, and Dz), ablation zone sphericity, quantitative sphericity measurement, and ablation volume were measured and compared between the two electrode types. Circularity of the ablation zone on the surface with x- and z- axes (zx plane) and amount of energy applied were also compared.

Results

Dx and Dz were significantly longer with ICWT than those with ICT (Dx: 3.0 vs. 2.8 cm, p = .018; and Dz: 2.7 vs. 2.3 cm, p < .001, respectively). Dy was not significantly different (3.0 vs. 2.9 cm, p = .220). Moreover, 85% (17/20) and 30% (6/20) of ablation zones from ICWT and ICT were spherical (p = .001), respectively. Quantitative measurement showed that ICWT was more spherical compared to ICT (0.962 vs. 0.881, p = .001). The ablation volume was also significantly higher with ICWT (11.55 vs. 9.45 cm3, p = .003). The ablation zone on the zx plane was more circular with ICWT (0.907 vs. 0.883, p = .028). The amount of energy applied was significantly bigger with ICWT (18508 vs. 16998 WS, p = .003).

Conclusion

Dual ICWT electrodes were better able to create more spherical and larger ablation zones than dual ICT electrodes.

中文翻译：

双内部冷却湿尖端与常规双内部冷却尖端射频电极之间的消融性能比较：离体牛肝的实验研究

摘要

客观的

与双内部冷却的尖端（ICT）电极相比，以评估双内部冷却的湿尖端（ICWT）射频电极的性能。

方法

为每种类型的电极创建了二十个消融区。计划的手术时间为6分钟。测量并比较了两种电极类型沿x，y和z轴（Dx，Dy和Dz）的消融区直径，消融区球形度，定量球形度测量值和消融体积。还比较了具有x和z轴（zx平面）的表面上的消融区的圆度以及所施加的能量。

结果

ICWT的Dx和Dz显着长于ICT（Dx：3.0 vs. 2.8 cm，p = .018； Dz：2.7 vs. 2.3 cm，p <.001）。Dy没有显着差异（3.0 vs. 2.9 cm，p = .220）。此外，来自ICWT和ICT的消融区域的85％（17/20）和30％（6/20）分别是球形的（p = .001）。定量测量显示，与ICT相比，ICWT的球形更强（0.962对0.881，p = .001）。ICWT的消融体积也明显更高（11.55 vs. 9.45 cm3，p = .003）。ICWT使zx平面上的消融区域更圆（0.907对0.883，p= .028）。使用ICWT时，施加的能量明显更大（18508 vs. 16998 WS，p = .003）。