Morita Yoshinori
Department of Gastroenterology, Kobe University School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan.
Gastrointest Endosc Clin N Am. 2014 Apr;24(2):183-9. doi: 10.1016/j.giec.2013.11.008. Epub 2014 Feb 13.
An electrical surgical unit (ESU) performs incisions and coagulation through applying Joule heat, generated by a high-frequency current onto tissue without neuromuscular stimulation. Output by the ESU includes incision output and coagulation output. Incision output is needed to generate a steam explosion (spark) by quickly increasing the intracellular fluid temperature through continuous application of Joule heat generated by the high-frequency current (unmodulated pulse: continuous wave). To perform safe and successful endoscopic submucosal dissection, one must fully understand the principles and features of an ESU to use settings that match the device and to adjust the settings appropriately for each situation.
电外科设备（ESU）通过将高频电流产生的焦耳热施加到组织上而不产生神经肌肉刺激来进行切割和凝血。ESU的输出包括切割输出和凝血输出。切割输出需要通过持续施加高频电流产生的焦耳热（未调制脉冲：连续波）快速提高细胞内液温度来产生蒸汽爆炸（火花）。为了安全、成功地进行内镜黏膜下剥离术，必须充分了解ESU的原理和特性，以便使用与设备匹配的设置，并针对每种情况适当调整设置。
