What are electrosurgical Units and why should we test them ... | 合法醫療器材資訊網

Electrosurgicalunits(ESU)useahigh-frequencyelectricalcurrenttocuttissueandcontrolbleedingbycausingcoagulation.Theperformanceandsafetyof ...

Let’s start with the basics. Electrosurgical units (ESU) use a high-frequency electrical current to cut tissue and control bleeding by causing coagulation. Tissue resistance to the high-density current causes a heating effect which results in tissue destruction. Electrical current is delivered and received through cables and electrodes. The electrodes may be activated by either a handpiece switch or a footswitch. The ESU may use a monopolar or a bipolar mode.

In monopolar mode, electrical current is delivered to the patient via an active cable and electrode. As shown in Figure 1, current returns to the unit through a return electrode pad or plate to disperse the return current, thus preventing focused heat which can cause burns. In bipolar mode, two electrodes, typically the tips of a pair of forceps or scissors, serve as the equivalent of the active and dispersive leads i...