Morris Marcia L
Medical Service Associates, Inc., Maplewood, Minnesota 55119, USA.
Gastroenterol Nurs. 2006 Mar-Apr;29(2):126-32; quiz 132-4. doi: 10.1097/00001610-200603000-00006.
An electrosurgery generator is a critical piece of equipment in any therapeutic endoscopy setting. Electrosurgery uses rapidly alternating current, provided by the electrosurgery generator, for both therapeutic cutting and coagulation of tissue. Basic variables important to electricity in general are also important to electrosurgery: current, voltage, circuit, and impedance (resistance). Monopolar and bipolar accessories (electrodes) are used in the endoscopy suite and these terms refer to the way in which the electric circuit is completed by the flowing current. Impedance resists current flow and changes with tissue type and degree of therapeutic coagulation. Waveforms are the high-frequency output selected by the operator when using an electrosurgery generator. Waveforms may be continuous or interrupted (modulated) and differ in voltage and degree of modulation. Certain waveforms are typically chosen for particular applications or accessories, such as polypectomy with a snare, because of predictable tissue-effect attributes of that waveform. Safe application of grounding pads, careful management of active accessories, and good care of electrosurgical equipment are crucial to patient and operator safety.
在任何治疗性内窥镜检查环境中，电外科发生器都是一种关键设备。电外科利用电外科发生器提供的快速交流电来对组织进行治疗性切割和凝血。一般来说，对电而言重要的基本变量对电外科也很重要：电流、电压、电路和阻抗（电阻）。在内窥镜检查室中使用单极和双极附件（电极），这些术语指的是电流使电路闭合的方式。阻抗会阻碍电流流动，并随组织类型和治疗性凝血程度而变化。波形是操作人员在使用电外科发生器时选择的高频输出。波形可以是连续的或间断的（调制的），并且在电压和调制程度上有所不同。由于特定波形具有可预测的组织效应特性，某些波形通常被选用于特定的应用或附件，例如用圈套器进行息肉切除术。安全使用接地垫、谨慎管理有源附件以及妥善保养电外科设备对患者和操作人员的安全至关重要。
