High-Frequency Electrosurgical Unit HFE-120RW-3.5 "Nadiya-4"

The unit is designed for cutting and coagulating soft tissues and blood vessels using high-frequency current in a non-anesthetic environment during surgeries in hospitals and clinics.

The unit is intended for operation in specially equipped premises at ambient temperatures from 10 °C to 35 °C and relative humidity up to 80 % at an ambient temperature of 25 °C.

Principle of Operation

The unit functions as a source of high-frequency current. The RF voltage is applied to active and passive (monopolar) electrodes or to a bipolar forceps (electrode) and conducted to the tissues of the patient. The electrosurgical effect of cutting and coagulation is based on generating sufficient heating of biological tissues by a narrow stream of RF current at the contact point of the active electrode or between the ends of the bipolar forceps. When using monopolar electrodes (CUT-1, CUT-2, COAG-M modes), the active electrode is significantly smaller than the passive electrode, resulting in a much higher current density at the active electrode. This is where the highest level of tissue heating occurs. At sufficient power near the active electrode, tissue fluid vaporizes and disrupts the tissue, causing cutting. When using bipolar forceps (COAG-B mode), both electrodes are active and similar in size, placed close together. RF voltage between them heats the tissue, and at a certain temperature, protein coagulation occurs.

Technical Data and Additional Specifications

The unit supports modes: standby, cutting, and coagulation, as well as specific operating modes:

Cutting modes:

• Mode CUT-1 – monopolar, continuous RF oscillation generation after the generator is switched on;
• Mode CUT-2 – monopolar, amplitude-pulsed RF oscillation generation after the generator is switched on.

Coagulation modes:

• Mode COAG-M – monopolar, continuous RF oscillation generation after the generator is switched on;
• Mode COAG-B – bipolar, continuous RF oscillation generation after the generator is switched on.

Output power adjustment in all modes is stepwise, from minimum to maximum.

The unit features:

• Standby and short-circuit modes at any output power level;
• Visual indicators:
  • Power supply on – green indicator;
  • Selected mode: CUT – yellow on yellow field; COAG – yellow on blue field;
  • Output power level in relative units – red indicator on yellow or blue field depending on mode;
  • Passive electrode cable disconnection – red "Err PE" label on power-level indicators.
• Audio-frequency tone signaling:
  • Continuous tone during CUT mode; single periodic beep during COAG mode;
  • Double periodic beep when the passive electrode cable is disconnected.
• Continuous operation for up to 8 hours at maximum output power under optimal load in a repeated short-term cycle: RF ON for 10 s, OFF for 30 s;
• Maximum continuous connection to the power network – no more than 8 hours.

The unit is protected against defibrillator discharges.

Product Composition and Delivery Set

The device package contents are listed in the table below

Unit Design

The unit consists of two separate blocks: the electronic unit and the foot pedal.

Front Panel of the Electronic Unit

1. Manufacturer’s trademark.

2. Unit model name.

3. Indicator for CUT-2 (mixed) mode.

4. Indicator for CUT-1 mode.

5. Digital power-level display for CUT mode.

6. Indicator for COAG-B (bipolar coagulation) mode.

7. Indicator for COAG-M (monopolar coagulation) mode.

8. Digital power-level display for COAG mode.

9. Power increase button in COAG mode.

10. Power decrease button in COAG mode.

11. Socket for bipolar forceps holder cable.

12. Mode switch button for COAG.

13. Power increase button in CUT mode.

14. Socket for active electrode holder cable.

15. Power decrease button in CUT mode.

16. Active electrode identification symbol.

17. Socket for passive electrode cable.

18. Mode switch button for CUT.

19. BF-type unit protection symbol, including defibrillator discharge protection.

20. Main power switch (mains voltage).

Rear Panel of the Electronic Unit

21. Socket for foot pedal connection.

22. Electrical safety symbol for Class II equipment.

23. Power cord.

The electronic unit is enclosed in a plastic housing consisting of top and bottom covers and front and rear panels. The front panel hosts all controls and indicators as described above.

Foot Pedal

Foot Pedal
a) Top View 1. Cable connecting the pedal to the electronic unit. 2. Pedal for activating the CUT mode. 3. Pedal for activating the COAG mode.	b) Bottom View 4. Protection class marking symbol (IPX7).

The foot pedal is a floor-mounted design with two spring-loaded platforms: left for CUT mode activation and right for COAG mode activation. Platforms move downward to activate and upward to deactivate when the foot is released. The pedal connects to the electronic unit via a cable.

HFE Electrosurgical Unit HFE-120RW-3.5 “Nadiya-4”: Uniqueness of the Device by Its Functional Capabilities

This device belongs to the category of coagulators that use high-frequency electricity to affect soft tissues during various surgical procedures. However, unlike other similar devices, this particular HFE electrosurgical unit HFE-120RW-3.5 Nadiya-4 is especially suitable for surgical rooms performing the most precise operations. This model is specifically developed for microsurgery.

What Functional Capabilities Distinguish the HFE-120RW-3.5 Nadiya-4 Units from Our Catalog?

With the help of the electrosurgical unit, tissues at the surgical site can be precisely and quickly incised. The advantage of this model is its inclusion of highly precise instruments. Thanks to this, the HFE-120RW-3.5 Nadiya-4, manufactured in Ukraine, is used in many countries for high-precision surgical interventions in the following fields:

• Ophthalmology – including vitrectomy, local episcleral buckling, panretinal laser coagulation, phacoemulsification with IOL implantation, glaucoma treatment, and similar procedures.
• Neurosurgery – applied when medication or physiotherapy fails to address neurological conditions, with surgery improving the patient’s condition.
• Plastic surgery – not only for cosmetic purposes but also used in veterinary medicine for replacing defective tissues or correcting deformities.
• Cosmetology – both human and veterinary procedures aimed at restoring the shape and function of body areas after trauma, illness, or previous surgery.
• Microsurgery – designed for surgical treatment of extremely small parts of organs, often invisible to the naked eye.

Additional Specifications

The HFE-120RW-3.5 Nadiya-4 units in our online store offer outstanding specifications, including:

• Maximum power output – 120 W in various cutting and coagulation modes.
• Operating frequency – 3.5 MHz required to operate the unit.
• Optimal load – depending on the selected mode, it is 100, 200, or 500 Ohms.
• Package – includes the main unit, footswitch, and neutral electrode.
• Electrical safety – classified as Class II, Type BF. The unit’s housing has IP24 protection, while the pedal has IP27.
• Power consumption – 300 VA for various surgical manipulations.
• Dimensions – compact and portable with an ergonomic pedal and optimally sized unit.

We recommend ordering the HFE-120RW-3.5 Nadiya-4 high-frequency electrosurgical units from our website with delivery across Ukraine. The prices are competitive since you are buying directly from the manufacturer. We also guarantee top quality and excellent performance.