An electrosurgical unit (ESU) passes high-frequency current (400–500 kHz) through tissue. At this frequency current does not stimulate nerves and muscles — instead its energy heats cells so fast they vaporize (cutting) or dry out slowly (coagulation). One generator replaces the scalpel and the ligature at once.
Monopolar and bipolar circuits
In monopolar mode current flows from the active electrode through the body to a return plate — powerful and universal, from skin incisions to deep dissection. In bipolar mode current passes only between the tips of the forceps: minimal spread, precise coagulation of fine structures, no return plate needed.
Cutting, blend, coagulation
- •Clean cut — continuous sine wave: smooth incision, minimal thermal margin
- •Blend 1–3 — interrupted waveform: the cut coagulates its own edges, less bleeding
- •Contact coagulation — the electrode touches the vessel and seals it
- •Spray coagulation — sparks scatter over an oozing surface without contact
Modern units add specialized algorithms: bipolar autostart, intelligent polypectomy, vessel sealing (Seal) and TURP modes for work in liquid medium — the ESU becomes a platform covering every surgical specialty.
Frequently asked questions
Have questions about the equipment?
Our specialists will advise on models, configurations and documentation — free of charge.