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HFE-200 “Nadiya-4” High-Frequency Electrosurgical Unit — Model 200RK/DFS
HFE-200 “Nadiya-4” (Model 200RK/DFS) is a high-frequency electrosurgical unit for cutting, coagulation and sealing of soft tissues and blood vessels using monopolar and bipolar electrosurgical instruments.
The model is equipped with a touchscreen monitor and supports operating frequencies of 440 and 1760 kHz. The unit combines monopolar pure and blended cutting, RH radio-wave modes, bipolar cutting, deep, contact and superficial coagulation, fulguration, and a sealing mode.
Maximum output power reaches up to 200 W for monopolar and bipolar cutting, as well as bipolar sealing. Programmable profiles are provided for storing frequently used settings, and access to the controls can be restricted with a password.
Key features of Model 200RK/DFS: touchscreen control, 440 and 1760 kHz frequencies, monopolar and bipolar modes, power up to 200 W, operating-setting profiles, timed automatic output shut-off, password access, patient return electrode circuit monitoring, and protection against defibrillator discharge.
Benefits of the HFE-200 Model 200RK/DFS
Touchscreen monitor
The display shows the selected cutting and coagulation modes, power levels, profile number, and system messages.
440 and 1760 kHz Frequencies
The unit supports standard 440 kHz high-frequency modes and RH modes operating at 1760 kHz.
Power up to 200 W
Power up to 200 W is available for monopolar cutting, RH cutting, bipolar cutting, and sealing.
Wide Range of Modes
The unit provides pure and blended cutting, deep, contact and superficial coagulation, fulguration, and bipolar sealing.
Programmable Profiles
Frequently used combinations of modes and power levels can be stored in the unit’s memory and recalled quickly before use.
Password Access
The settings allow user access to the unit’s controls to be restricted with a numeric password.
Automatic Output Shut-Off
A time limit can be set separately for cutting and coagulation, after which output power stops automatically.
Adjustment during operation
The power level can be adjusted while HF current is active, with the selected value shown on the touchscreen.
Patient return electrode monitoring
If the circuit is interrupted, the unit blocks HF output and displays a warning instructing the operator to check the connection.
Defibrillator protection
The applied-part design provides protection against the effects of defibrillator discharge.
Touchscreen Control and Operating Profiles
The touchscreen interface combines cutting and coagulation mode selection, power adjustment, profile switching, and access to system settings. After power-up, the unit performs an automatic self-test and then opens the main operating screen.
Each profile stores the selected modes and output power levels. A profile name can be entered using the on-screen keyboard. The settings also provide language selection, password configuration, and timed automatic output shut-off.
HFE-200 Model 200RK/DFS Operating Modes
The unit provides two main types of operation: РІЗАННЯ (CUTTING) and КОАГУЛЯЦІЯ (COAGULATION). Modes designated RH operate at 1760 kHz.
| Type of operation | Application | Mode | Frequency | Optimum load | Power | Adjustment increment |
|---|---|---|---|---|---|---|
| Cutting | Monopolar | Cutting | 440 kHz | 500 ohms | 5–200 W | 1/5/10 W |
| RH cutting | 1760 kHz | 500 ohms | 5–200 W | 1/5/10 W | ||
| Blended cutting | 440 kHz | 500 ohms | 5–150 W | 1/5/10 W | ||
| RH blended cutting | 1760 kHz | 500 ohms | 5–150 W | 1/5/10 W | ||
| Bipolar | Cutting | 440 kHz | 100 ohms | 5–200 W | 1/5/10 W | |
| Coagulation | Monopolar | Deep coagulation | 440 kHz | 100 ohms | 5–150 W | 1/5/10 W |
| Contact coagulation | 440 kHz | 500 ohms | 5–120 W | 1/5 W | ||
| RH rapid superficial coagulation | 1760 kHz | 100 ohms | 5–120 W | 1/5 W | ||
| Spray coagulation (fulguration) | 1760 kHz | 500 ohms | 5–60 W | 1/5 W | ||
| Bipolar | Sealing | 440 kHz | 20 ohms | 5–200 W | 1/5/10 W | |
| Deep coagulation | 440 kHz | 100 ohms | 5–120 W | 1/5 W | ||
| Rapid superficial coagulation | 1760 kHz | 100 ohms | 5–120 W | 1/5 W |
Monitoring, Settings and System Messages
- control of monopolar HF output using the footswitch or buttons on the electrode holder;
- power adjustment: 5–50 W in 1 W increments, 50–120 W in 5 W increments, and 120–200 W in 10 W increments;
- power adjustment while HF output is active;
- audible feedback for mode switching, power adjustment, and HF output activation;
- mode-switching lockout while HF output is active;
- automatic output power lockout if parameters deviate beyond critical limits;
- patient return electrode circuit integrity monitoring;
- ability to set a separate automatic output shut-off time for cutting and coagulation.
Principle of Electrosurgical Action
The HFE-200 Model 200RK/DFS is a source of high-frequency current to which monopolar or bipolar electrosurgical instruments are connected. The electrosurgical effect is based on local heating of biological tissue by HF current.
Monopolar application
An active electrode and a patient return electrode are used. Because the active electrode has a smaller working surface, a higher current density is produced at the contact area. Depending on the selected mode and power level, the tissue is cut or coagulated.
Bipolar application
Both working parts of the bipolar instrument are active. HF current passes between them through the grasped tissue, heating it locally and producing the required electrosurgical effect.
Technical Specifications of the HFE-200 “Nadiya-4” Model 200RK/DFS
| Equipment type | High-frequency electrosurgical unit |
| Name and model | HFE-200 “Nadiya-4”, Model 200RK/DFS |
| Operating states | Cutting, coagulation |
| Main HF signal frequencies | 440 and 1760 kHz |
| Maximum output power | Up to 200 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 |
| Supply voltage | 230 ± 23 V |
| Mains frequency | 50 ± 1 Hz |
| Power consumption | Not more than 400 VA |
| Ready time after switch-on | Not more than 1 minute |
| 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 |
| Patient return electrode area | 375 cm² |
| Electronic unit weight | Not more than 5.0 kg |
| Footswitch weight | No more than 1.5 kg |
| Footswitch cable length | At least 3 m |
| Specified service life | 5 years |
| Mean time between failures | At least 1000 hours |
Classification and Degrees of 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 Controls
The unit consists of an electronic unit and a separate dual-pedal footswitch. The electronic unit includes a touchscreen monitor, connectors for monopolar, bipolar and patient return electrodes, a system settings button, and a mains power switch.
Front panel of the electronic unit
- touchscreen monitor;
- “РІЗАННЯ” (CUTTING) mode indicator;
- profile name button and indicator;
- cutting mode selection button;
- “КОАГУЛЯЦІЯ” (COAGULATION) mode indicator;
- coagulation mode selection button;
- profile selection buttons;
- profile number indicator;
- “БІ” (BI) connectors for the bipolar electrode holder;
- “АКТ” (ACTIVE) connector for the monopolar electrode holder;
- “ПАС” (PATIENT RETURN) connector for the patient return electrode;
- button for password, language, and automatic output shut-off settings;
- coagulation power adjustment buttons;
- cutting and coagulation power level indicators;
- cutting power adjustment buttons;
- “МЕРЕЖА” (POWER) switch.
Rear panel of the electronic unit
The rear panel contains the footswitch connector, cooling fan and power cable.
Dual-pedal footswitch
- left yellow pedal — activates cutting mode;
- right blue pedal — activates coagulation mode;
- enclosure protection rating: IPX7.
Instrument Connection Diagram
Operating Conditions
- ambient air temperature: +10 to +35 °C;
- relative humidity: up to 80% at +25 °C;
- use in specially equipped rooms;
- duration of one HF activation: up to 10 seconds;
- pause between activations: 30 seconds;
- operating time in intermittent mode: up to 8 hours;
- the unit is not intended for connection to residential electrical networks.
Essential Safety Requirements
The HFE-200 Model 200RK/DFS must only be operated by trained personnel after they have read the operating manual. The power should be set to the minimum level sufficient to produce the required electrosurgical effect.
- during monopolar operation, reliable contact between the patient return electrode and the patient’s body must be ensured;
- the patient must be insulated from metal parts of the operating table;
- electrode cables must not touch the patient or other connecting cables;
- active electrodes that are temporarily not in use must be isolated from the patient;
- when performing haemostasis through a surgical instrument, press the footswitch only after the active electrode has made contact with the instrument;
- do not keep the footswitch pressed after HF application has ended;
- if implanted stimulators, sensors, or foreign metal objects are present, the restrictions in the operating manual must be observed; in cases of extreme necessity, only bipolar coagulation is provided for;
- surgical gloves must be worn when using the bipolar forceps;
- 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-200 “Nadiya-4” Model 200RK/DFS
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-200 “Nadiya-4” Model 200RK/DFS, receive advice on compatible electrosurgical instruments, and select equipment that meets the needs of your facility.