Lorentzen T
Department of Ultrasound, Herlev Hospital, University of Copenhagen, Herlev, Denmark.
Acad Radiol. 1996 Jul;3(7):556-63. doi: 10.1016/s1076-6332(96)80219-4.
I developed and tested a cooled needle electrode (CNE) for radiofrequency (RF) tissue ablation in vitro.
A 2-mm needle electrode with two lumina for internal water perfusion and irrigation of the needle tip and a conventional needle electrode were tested in ex vivo calf liver during different levels of output power (wattage). RF lesions produced by the two needle types were further evaluated with a thermal camera.
When the CNE was used, a significant increase in the duration of ablation was observed, which caused a significant increase in delivered energy and lesion size when compared with the conventional needle electrode. The largest lesion produced with the CNE was almost spherical and measured 41 x 37 mm (longitudinal x transverse). The cooling effect was reflected in the image obtained with the thermal camera.
This technique produced very large lesions compared with conventional methods and may have a role in many different kinds of RF needle ablation.
我研发并在体外测试了一种用于射频（RF）组织消融的冷却针电极（CNE）。
在离体小牛肝脏中，于不同输出功率（瓦特数）水平下，对带有两个用于内部水灌注和针尖冲洗的管腔的2毫米针电极和传统针电极进行了测试。用热成像仪进一步评估了两种针型产生的射频损伤。
使用CNE时，观察到消融持续时间显著增加，与传统针电极相比，这导致传递能量和损伤大小显著增加。CNE产生的最大损伤几乎呈球形，尺寸为41×37毫米（纵向×横向）。冷却效果在热成像仪获得的图像中得到体现。
与传统方法相比，该技术产生的损伤非常大，可能在多种不同类型的射频针消融中发挥作用。
