A high-frequency coagulator is used in endoscopic surgery and significantly expands medical capabilities. The device can exert its effects in various ways, so before purchasing one, it's worth familiarizing yourself with the main features of these devices. Electrosurgical coagulators [https://eleps.ru/katalog/elektrokhirurgiya-elektrokhirurgicheskie-apparaty/] can act on tissue in monopolar and bipolar modes. When operating in monopolar mode, the device can be called an electroscalpel. The device uses a single electrode (lancet, needle, spatula, etc.), which causes localized coagulation upon contact with the tissue at a single point. When operating in bipolar mode, the coagulator is equipped with electrodes (scissors, forceps, tweezers, etc.) that contact the tissue at two points. Methods of application are also divided into two types: - contact (incision) for creating a clean, pinpoint hole; - non-contact (spray) for applying to relatively large areas of tissue. Accordingly, the non-contact method reduces trauma, but the contact method is more versatile. The argon plasma coagulator operates on the principle of non-contact application using an argon plasma jet. The main advantage of this method is the absence of chemical reactions when argon interacts with tissue.