Department of Anesthesiology and Pain Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea.
Korean J Pain. 2012 Jul;25(3):151-4. doi: 10.3344/kjp.2012.25.3.151. Epub 2012 Jun 28.
The aim of this study was to document the optimal spacing of two cannulae to form continuous strip lesions and maximal surface area by using water-cooled bipolar radiofrequency technology.
Two water-cooled needle probes (15 cm length, 18-gauge probe with 6 mm electrode tip) were placed in a parallel position 10, 20, 24, 26, and 28 mm apart and submerged in egg white. Temperatures of the probes were raised from 35℃ to 90℃ and the progress of lesion formation was photographed every 1 minute with the increase of the tip temperature. Approximately 30 photographs were taken. The resultant surface areas of the lesions were measured with the digital image program.
Continuous strip lesions were formed when the cannulae were spaced 24 mm or less apart; monopolar lesions around each cannula resulted if they were spaced more than 26 mm apart. Maximal surface areas through the formation of continuous strip lesion were 221 mm(2), 375 mm(2), and 476 mm(2) in 10, 20, and 24 mm, respectively. Summations of maximal surface area of each monopolar lesions were 394 mm(2) and 103 mm(2) in 26 and 28 mm, respectively.
Water-cooled bipolar Radiofrequency technology creates continuous "strip" lesions proportional in size to the distance between the probes till the distance between cannulae is 24 mm or less. Spacing the cannulae 24 mm apart and treating about 80℃ for 24 minutes maximizes the surface area of the lesion.
本研究旨在记录使用水冷双极射频技术，通过两个套管形成连续条状损伤和最大表面积的最佳间隔。
将两个水冷针探头（长 15cm，18 号探头，电极尖端 6mm）以 10、20、24、26 和 28mm 的间隔平行放置，并浸没在蛋清中。将探头温度从 35°C升高到 90°C，随着尖端温度的升高，每 1 分钟拍摄一次损伤形成的进展情况。拍摄了大约 30 张照片。使用数字图像程序测量损伤的表面积。
当套管之间的间隔小于或等于 24mm 时，可形成连续条状损伤；如果间隔大于 26mm，则会形成每个套管周围的单极损伤。在 10、20 和 24mm 处，通过形成连续条状损伤，最大表面积分别为 221mm(2)、375mm(2)和 476mm(2)。在 26 和 28mm 处，每个单极损伤的最大表面积总和分别为 394mm(2)和 103mm(2)。
水冷双极射频技术可创建与探针之间距离成正比的连续“条状”损伤，直至套管之间的距离小于或等于 24mm。将套管间隔 24mm 分开，并以约 80°C 处理 24 分钟，可使损伤面积最大化。
