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HFE-300 “Nadiya-4” High-Frequency Electrosurgical Unit — Model 300RK/4.2
HFE-300 “Nadiya-4” (Model 300RK/4.2) is a high-frequency electrosurgical unit for cutting, resection, coagulation, vaporisation and bipolar sealing of soft tissues and blood vessels. The model is designed for use with monopolar and bipolar electrosurgical instruments in specially equipped operating rooms.
The unit is equipped with a touchscreen monitor, supports 10 programmable profiles, and provides output power up to 300 W depending on the selected mode. The main high-frequency signal frequency is 440 ± 10 kHz.
The model provides monopolar cutting and coagulation modes, bipolar cutting, resection, vaporisation and sealing. The power level can be adjusted while HF current is active, and mode settings are stored in profiles for quick reuse.
Key features of Model 300RK/4.2: power up to 300 W, touchscreen control, 10 operating profiles, monopolar and bipolar modes, stepwise power adjustment, patient return electrode monitoring, automatic HF output lockout in alarm conditions, password access, and protection against defibrillator discharge.
Benefits of the HFE-300 Model 300RK/4.2
Power up to 300 W
Maximum power of 300 W is available in selected monopolar and bipolar cutting, resection, vaporisation and sealing modes.
Touchscreen Control
The monitor displays the cutting and coagulation modes, set power levels, profile number, and system messages.
10 programmable profiles
The unit stores the selected modes and power levels, and each profile can be assigned a custom name.
Monopolar and Bipolar Operation
Modes are provided for standard electrodes, resectoscopes, laparoscopic instruments, and arthroscopic instruments.
Patient return electrode monitoring
If the patient return electrode circuit is interrupted, the unit stops HF output and displays a warning on the monitor.
Access Settings
The system menu provides language selection, password configuration, and setting of the automatic output shut-off time.
HFE-300 Model 300RK/4.2 Operating Modes
The unit provides two main types of operation: РІЗАННЯ (CUTTING) and КОАГУЛЯЦІЯ (COAGULATION). The parameters of each mode depend on the type of connected instrument and the optimum load.
| Type of operation | Application | Mode | Optimum load | Power range |
|---|---|---|---|---|
| Cutting | Monopolar | Cutting | 500 ohms | 10–300 W |
| Blended cutting | 500 ohms | 10–200 W | ||
| Resection | 500 ohms | 10–300 W | ||
| Laparoscopic/arthroscopic | 500 ohms | 10–200 W | ||
| Bipolar | Cutting | 100 ohms | 10–300 W | |
| Resection | 25 ohms | 10–300 W | ||
| Vaporisation | 25 ohms | 10–300 W | ||
| Coagulation | Monopolar | Deep coagulation | 100 ohms | 5–200 W |
| Contact coagulation | 500 ohms | 5–120 W | ||
| Resectoscope coagulation | 100 ohms | 5–120 W | ||
| Laparoscopic/arthroscopic | 100 ohms | 5–120 W | ||
| Bipolar | Sealing | 25 ohms | 5–300 W | |
| Deep coagulation | 100 ohms | 5–120 W | ||
| Resection | 100 ohms | 5–200 W | ||
| Vaporisation | 100 ohms | 5–200 W |
Control, Indication and Monitoring
- stepwise power adjustment: 1 W increments from 5 to 50 W, 5 W increments from 50 to 120 W, and 10 W increments above 120 W;
- control of monopolar HF output using the footswitch or buttons on the electrode holder;
- changing the working instrument without switching off or restarting the system;
- adjustment of the power level while HF output is active;
- visual and audible indication of modes, power, and HF output activation;
- mode-switching lockout while HF output is active;
- automatic output power lockout if parameters deviate beyond critical limits;
- HF output lockout and a warning on the monitor if the patient return electrode circuit is interrupted.
Technical Specifications
| Name and model | HFE-300 “Nadiya-4”, Model 300RK/4.2 |
| Operating states | Cutting, coagulation |
| Main HF signal frequency | 440 ± 10 kHz |
| Maximum output power | Up to 300 W depending on the mode |
| Maximum output voltage | Cutting: up to 450 V; coagulation: up to 300 V |
| Output current limit | Not more than 5.0 A |
| Number of programmable profiles | 10 |
| Supply voltage | 220 ± 22 V |
| Mains frequency | 50 ± 1 Hz |
| Power consumption | Not more than 600 VA |
| Ready time after switch-on | No more than 5 seconds |
| Duty cycle | 10 seconds of HF current delivery / 30-second pause |
| Maximum operating duration | Up to 8 hours in intermittent operation |
| Electronic unit dimensions | 300 × 220 × 120 mm |
| Footswitch dimensions | 200 × 230 × 50 mm |
| Electronic unit weight | Not more than 5 kg |
| Footswitch weight | Not more than 1 kg |
| Footswitch cable length | At least 3 m |
| Patient return electrode area | Not more than 390 cm² |
| Specified service life | 5 years |
| Mean time between failures | At least 1000 hours |
Classification and Protection
| Climatic version | UHL 4.2 |
| Resistance to mechanical impact | Group 2 |
| Failure consequence class | Class B |
| Protection against electric shock | Class II, BF-type applied part |
| Degree of protection of the electronic unit | IP24 |
| Degree of protection of the footswitch | IPX7 |
| Risk class | IIb |
| Defibrillator protection | Provided |
The unit is not classified as life-support equipment or as medical measuring equipment.
Package Contents
| No. | Item | Designation | Quantity |
|---|---|---|---|
| 1 | Electronic unit | — | 1 pc. |
| 2 | Dual-pedal footswitch | B-001 | 1 pc. |
| 3 | Patient return (neutral) electrode | B-003 | 1 pc. |
| 4 | Monopolar electrode holder for 2.0 mm electrodes | B-005 | 1 pc. |
| 5 | Bipolar forceps holder | B-007 | 1 pc. |
| 6 | Straight bipolar forceps, 200 mm | PP-007 | 1 pc. |
| 7 | Straight blade electrode | 04500 | 1 pc. |
| 8 | Curved blade electrode | 04500 | 1 pc. |
| 10 | Operating manual | — | 1 pc. |
| 11 | Packaging for the unit | — | 1 pc. |
Design and Operating Principle
The unit consists of an electronic unit and a separate dual-pedal footswitch. The front panel contains a touchscreen monitor, connectors for monopolar, bipolar and patient return electrodes, and a mains power switch.
The left yellow pedal activates cutting mode, while the right blue pedal activates coagulation mode. In monopolar modes, HF output can also be controlled using buttons on a compatible electrode holder.
The electrosurgical effect is based on local heating of tissue by high-frequency current. In monopolar mode, current flows between the active and patient return electrodes; in bipolar mode, it flows between the working parts of the bipolar instrument.
Operating Conditions and Safety
- ambient air temperature: +10 to +35 °C;
- relative humidity: up to 80% at +25 °C;
- the unit must only be operated by trained personnel after they have read the operating manual;
- the power must be set to the minimum level sufficient to produce the required electrosurgical effect;
- during monopolar operation, full and reliable contact between the patient return electrode and the patient’s body must be ensured;
- electrode cables must not touch the patient or other connecting cables;
- if implanted stimulators, sensors or foreign metal objects are present, the restrictions in the operating manual must be considered; in cases of extreme necessity, only bipolar coagulation is provided for;
- the unit must only be repaired by the manufacturer’s authorised service centres.
Do not use the unit in the presence of flammable mixtures of anaesthetic with air or oxygen, nitrous oxide, or flammable disinfectant liquids in the procedure area.
Order the HFE-300 “Nadiya-4” Model 300RK/4.2
Before ordering, determine the required monopolar and bipolar modes, types of working instruments, and the equipment requirements of the operating department.
Submit a request on Nadiya-4.com to confirm the current package contents of the HFE-300 “Nadiya-4” Model 300RK/4.2, receive advice on compatible electrosurgical instruments, and select equipment that meets the needs of your facility.