FIELD: medicine.SUBSTANCE: adapter element (3) for reception of a high-frequency surgical handle (5) having at least one electrical connection (23) for electric current supply, adapted to form a duct (9) for smoke removal from the treatment area when handle (5) is placed in the adapter element (3). At the distal end of the adapter element (3), at least one electrode (17) is mounted in the form of a rod, a tip, a ring, a ball or a loop, or a combination thereof. In order to couple the electrical connection (23) to the electrode (17), the handle (5) has an connection (31) adapted to insert the proximal end of the electrode (17) during fixation of the handle (5) in the adapter element (3). High-frequency surgical instrument containing a high-frequency surgical handle (5) and an adapter element (3). An adapter nozzle (49) for detachable connection to the adapter element (3). A kit for high-frequency surgery. Electrosurgical system with a high-frequency surgical instrument. The group of inventions provides creatio
