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    Electrosurgical Unit (ESU)

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    • Electrosurgical Unit (ESU)

    ESU is a versatile system meeting all operating theatre requirements. It is equipped with a fast microprocessor, processing all operating parameters in real time. It enables fast automatic current adjustment to changing operating conditions. 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. Special modes enable operation in difficult conditions, laparoscopy, and endoscopy. These systems include an electrosurgical generator (i.e., power supply, waveform generator) and a hand piece including one or several electrodes.

    PRINCIPLES OF OPERATION

    In monopolar electrosurgery, tissue is cut and coagulated by completion of an electrical circuit that includes a high frequency oscillator and amplifiers within the ESU, the patient, the connecting cables, and the electrodes. In most applications, electric current from the ESU is conducted through the surgical site with an active cable and electrode. The electrosurgical current exits the patient through a dispersive electrode (usually placed on the patient at a site remote from the surgical site) and its associated cable connected to the neutral side of the generator. In bipolar electrosurgery, two electrodes (generally, the two tips of a pair of forceps or scissors) serve as the equivalent of the active and return electrodes in the monopolar mode.

    FUNCTIONS

    AREA OF USE