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HFE-300 Series Electrosurgical Units by Nadiya-4
The Nadiya-4 HFE-300 series includes high-frequency electrosurgical units with an output power of up to 300 W for cutting and coagulation of soft tissues and blood vessels. The model range includes the basic HFE-300, the advanced HFE-300RK, and the extended HFE-300RK-4.2 version.
All three models operate at a fundamental frequency of 0.44 MHz, but differ in their control method, range of monopolar and bipolar modes, ability to store operating profiles, and vessel-sealing support. The HFE-300 is intended for basic cutting and coagulation modes, while the 300RK and 300RK-4.2 models are equipped with a touch-screen monitor and provide expanded functionality.
HFE-300 Model Range
Each model in the series is designed for professional use but has its own set of modes and functions. The comparison table below highlights the main differences.
| Model | Operating frequency | Maximum output power | Controls | Main capabilities |
|---|---|---|---|---|
| HFE-300 | 0.44 MHz | Up to 300 W in pure-cut mode | Buttons and digital displays | Pure and blended cutting, monopolar and bipolar coagulation |
| HFE-300RK | 0.44 MHz | Up to 300 W depending on the mode | Touch-screen monitor | M1, M2, BI1, and BI2 modes, 10 profiles, bipolar cutting, and vessel sealing for vessels 2–5 mm in diameter |
| HFE-300RK-4.2 | 0.44 MHz | Up to 300 W depending on the mode | Touch-screen monitor | Cutting, resection, vaporisation, laparo/arthro modes, 10 profiles, and vessel sealing for vessels 2–5 mm in diameter |
HFE-300: Basic Model with Output Power up to 300 W
HFE-300 supports four main types of electrosurgical effect. Separate buttons and digital displays allow the cutting and coagulation power settings to be adjusted independently.
| Mode | Application | Optimum load | Power range |
|---|---|---|---|
| CUT-1 | Monopolar pure cutting | 200 ohms | 10–300 W |
| CUT-2 | Monopolar blended cutting | 100 ohms | 10–200 W |
| COAG-M | Monopolar coagulation | 50 ohms | 10–200 W |
| COAG-B | Bipolar coagulation | 50 ohms | 5–120 W |
The fundamental frequency of the output HF signal is 440 kHz in the pure-cut, monopolar-coagulation, and bipolar-coagulation modes. The blended-cut mode uses amplitude-pulse modulation at a frequency of 22 ± 2.2 kHz.
HFE-300RK: Touch-Screen Control, Profiles, and Sealing
HFE-300RK is equipped with a touch-screen monitor and supports the M1 and M2 monopolar modes as well as the BI1 and BI2 bipolar modes. The unit allows up to ten operating profiles to be saved with selected modes, power levels, and custom names.
The model supports bipolar cutting and sealing of vessels with a diameter of 2–5 mm. The output power level can be adjusted while high-frequency current is being delivered, while the passive-electrode monitoring system blocks the HF output if its circuit is interrupted.
| Application | Mode | Function | Optimum load | Power range |
|---|---|---|---|---|
| Monopolar | M1 | Cutting | 500 ohms | 10–300 W |
| M1 | Coagulation | 200 ohms | 10–250 W | |
| M2 | Blended cutting | 500 ohms | 10–200 W | |
| M2 | Forced coagulation | 100 ohms | 10–120 W | |
| Bipolar | BI1 | Cutting | 100 ohms | 10–300 W |
| BI1 | Coagulation | 100 ohms | 10–120 W | |
| BI2 | Cutting / sealing | 20 ohms | 10–300 W | |
| BI2 | Coagulation at increased tissue resistance | 50 ohms | 10–120 W |
HFE-300RK-4.2: Expanded Modes for Different Instruments
HFE-300RK-4.2 is the most advanced model in the series. It is designed for cutting, resection, coagulation, vaporisation, and bipolar sealing of soft tissues and blood vessels. The unit supports standard monopolar and bipolar instruments as well as resectoscopes, laparoscopic instruments, and arthroscopic instruments.
Key Features of the 300RK-4.2
- maximum output power up to 300 W;
- touch-screen monitor and 10 programmable profiles;
- monopolar and bipolar cutting;
- resection and vaporisation modes;
- modes for laparoscopic and arthroscopic instruments;
- bipolar sealing of vessels with a diameter of 2–5 mm;
- power adjustment during HF activation;
- passive-electrode monitoring, access password, and automatic power-delivery shut-off.
HFE-300RK-4.2 Operating Modes
| 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 | ||
| Laparo/arthro | 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 | ||
| Laparo/arthro | 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 |
How to Select an HFE-300 Series Unit
Selection should take into account not only the maximum output power but also the required modes, instrument types, control method, and the need for vessel sealing.
- HFE-300 is suitable when a high-power unit with four basic modes is required: pure and blended cutting, monopolar coagulation, and bipolar coagulation.
- HFE-300RK is suitable for applications requiring touch-screen control, 10 operating profiles, bipolar cutting, and vessel sealing.
- HFE-300RK-4.2 should be considered when resection and vaporisation modes are additionally required, as well as operation with resectoscopic, laparoscopic, or arthroscopic instruments.
The number of modes alone does not determine whether a unit is suitable for a specific procedure. The model should be selected according to the planned procedures, compatible instruments, staff qualifications, and the manufacturer’s official documentation.
Monopolar and Bipolar Applications
In monopolar mode, current passes between the active instrument and the passive, or neutral, electrode. The highest current density is created at the point where the active electrode contacts the tissue.
In bipolar mode, both working parts of the forceps, clamp, or another compatible instrument are active. The HF current passes locally through the tissue held between them.
The HFE-300RK and HFE-300RK-4.2 models additionally support bipolar cutting and sealing. A compatible instrument must be used for each mode, and the requirements of the instructions for use must be followed.
Controls, Indication, and Monitoring Systems
The basic HFE-300 is equipped with separate buttons and digital displays for adjusting cutting and coagulation. A two-pedal footswitch allows the required function to be activated hands-free.
The HFE-300RK and HFE-300RK-4.2 are equipped with a touch-screen monitor displaying modes, power levels, profiles, and system messages. The unit monitors the passive-electrode circuit, prevents mode switching while HF current is actively being delivered, and stops power delivery if critical parameter deviations occur.
The 300RK-4.2 also provides password setup, interface-language selection, and adjustment of the automatic output-power shut-off time.
Applications of the HFE-300 Series
Depending on the specific model, operating modes, connected instruments, and approved methods, HFE-300 series units may be used in:
- general, abdominal, and thoracic surgery;
- gynaecology and urology;
- coloproctology;
- vascular and endocrine surgery;
- breast surgery and oncology;
- traumatology;
- video-assisted endoscopic surgery and laparoscopy;
- arthroscopic and resectoscopic procedures — with the compatible modes of the 300RK-4.2;
- veterinary surgery.
The final decision on using a particular mode should be made according to the official instructions, procedural requirements, and staff qualifications.
Instruments and Standard Configuration
HFE-300 series units are used with monopolar and bipolar electrosurgical instruments. Depending on the model and current configuration, the supply package may include:
- electronic unit;
- two-pedal footswitch;
- passive, or neutral, electrode;
- holder for Ø 2.0 mm monopolar electrodes;
- bipolar instrument holder;
- straight bipolar forceps, 200 mm;
- straight and curved knife electrodes;
- instructions for use;
- packaging.
Sealing clamps, bipolar scissors, and instruments for resection, vaporisation, laparoscopy, and arthroscopy may be selected separately according to the model and planned mode. The exact configuration should be confirmed on the product page, in the invoice, or in the specification.
Additional electrodes, forceps, clamps, footswitches, cables, holders, and adapters are available in the “Electrosurgical Instruments” section.
Classification and Operating Conditions
The units are Class II devices with a Type BF applied part and belong to risk class IIb. The electronic unit has an IP24 enclosure protection rating, while the footswitch is rated IPX7. Protection against the effects of defibrillator discharges is provided.
The equipment operates in intermittent-duty mode: up to 10 seconds of high-frequency current delivery followed by a 30-second pause. The maximum operating time while observing this cycle is up to 8 hours. The intended service life is at least five years, and the mean time between failures is at least 1,000 hours.
Before first use, personnel must read the official instructions for the selected model. The documents are available on the product pages and in the “Instructions” section.
Warranty, Service, and Dispatch
Nadiya-4 electrosurgical units are supplied with a standard 12-month manufacturer’s warranty. Post-warranty maintenance, diagnostics, and equipment repair are also available.
In-stock products are dispatched within 1–3 business days after payment has been received and the order has been confirmed. Detailed terms are available on the “Warranty and Service” and “Payment and Delivery” pages.
Frequently Asked Questions About the HFE-300 Series
What is the difference between HFE-300, HFE-300RK, and HFE-300RK-4.2?
HFE-300 has four basic modes and button controls. HFE-300RK is equipped with a touch-screen monitor and supports 10 profiles, bipolar cutting, and vessel sealing. HFE-300RK-4.2 additionally provides resection and vaporisation modes and operation with resectoscopic, laparoscopic, and arthroscopic instruments.
What is the maximum output power of the HFE-300 series?
The maximum output power is up to 300 W. The specific available range depends on the model, selected mode, and optimum load.
Which models support vessel sealing?
The HFE-300RK and HFE-300RK-4.2 support sealing of vessels with a diameter of 2–5 mm. A compatible bipolar instrument is required.
Do the HFE-300RK and HFE-300RK-4.2 have touch-screen control?
Yes. Both models are equipped with a touch-screen monitor and allow up to ten operating profiles to be saved with selected modes and power levels.
Which model supports resection and vaporisation?
Dedicated resection and vaporisation modes are available in the HFE-300RK-4.2. Before ordering, the type of surgical instrument should be determined and its compatibility with the corresponding unit output and mode should be confirmed.
Can instruments for the HFE-300 be purchased separately?
Yes. Monopolar electrodes, bipolar forceps, clamps and scissors, passive electrodes, holders, footswitches, cables, and adapters are available separately. Their compatibility with the specific model and mode should be checked before ordering.
Buy an HFE-300 Nadiya-4 Electrosurgical Unit
The Nadiya-4.com catalogue offers the basic HFE-300, the advanced HFE-300RK, and the extended HFE-300RK-4.2 with touch-screen control, programmable profiles, and vessel sealing.
Contact our specialists to compare the models, confirm the current configuration, check electrosurgical-instrument compatibility, and select a unit for the needs of your facility.