E-learning courses: HF surgery/ultrasonic surgery

For surgeons, theatre staff and medical technology suppliers

BOWA ACADEMY goes digital
Use e-learning to study anywhere, anytime!

Online Academy – your interactive learning platform

Our e-learning courses are based on learning nuggets, interactive animations, videos and graphics, all with a high didactic learning quality. Practical examples and applications from high-frequency surgery and ultrasound surgery enable participants to seamlessly integrate new knowledge into their everyday work. The goal of the BOWA ACADEMY is to promote the safe use of energy-based surgery for the benefit of the patient.

Enhance your expertise quickly and soundly with our digital learning offerings – for sustainable learning success.

Get started now and benefit from the free e-learning offers:

Interactive learning

Expert knowledge communicated clearly and simply


You decide when and where you want to study


At the end of a course, can be repeated at will


After successful completion of the theory exam

E-learning courses – register now and start right away

The BOWA Online Academy is available 24/7.

HF surgery “driving licence”

Expand your knowledge of how high-frequency surgery works. Discover what tissue effects can be achieved with HF surgery and become more confident in its use.

Multilingual: DE, EN, FR, IT, ES, PT, PL

Ultrasonic surgery “driving licence”

Study interactive and 3D-animated content to learn how ultrasound surgery works, what its fundamentals are, and how ultrasound is used.

Multilingual: DE, EN, FR, IT, ES, PT, PL

Neutral electrode

Use and proper handling in HF surgery

Neutral electrodes are subject to particular safety measures. Learn all about safe use.

Multilingual: DE, EN

Smoke evacuation in the operating theatre

A healthy and safe working environment thanks to clean air in the operating theatre

Surgical smoke is dangerous to the health of surgical staff! Learn more about the dangers and effective countermeasures.

Multilingual: DE, EN

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Multilingual courses



Impressed participants


Global participants

Medical technology suppliers, healthcare professionals

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BOWA ACADEMY e-learning course catalogue

BOWA ACADEMY for HF surgery and ultrasonic surgery

Knowledge transfer and practical applications

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FAQs: Interesting facts about HF surgery

In HF surgery, the desired thermal effect is produced by the flow of the current in the tissue itself (endogenous tissue heating). This has a range of different tissue effects in the patient’s tissue. In cautery, the tissue is heated from the outside (exogenously); it is only used for superficial haemostasis. Cutting tissue as in high-frequency technology is not possible with a cauter.

HF surgery enables stress-free cutting combined with simultaneous haemostasis of the tissue. It is an effective instrument for open surgical procedures as well as minimally invasive applications. Cutting and coagulation with high-frequency current is the gold standard in state-of-the-art surgery.

In HF surgery, an instrument passes a high-frequency alternating current through the tissue between two electrodes. By activating the HF instrument, the high-frequency alternating current generates heat in the tissue for the desired surgical tissue effects.

Electrosurgical cutting and electrosurgical coagulation.

Cutting: Vaporisation of intra- and extracellular fluid and destruction of cell membranes, resulting in a surgical incision.
Coagulation: Vaporisation of intra- and extracellular fluid without the destruction of cell structures. This leads to tissue shrinkage, seals the vessels and stops the bleeding, i.e. haemostasis. Coagulation normally uses voltages below 200 V while higher voltages are used for cutting.

In electrosurgery, alternating currents with a frequency of over 200,000 Hz (200 kHz) are used. This frequency range does not result in neuromuscular irritation.

The generator transforms low-frequency mains current into high-frequency alternating current (AC). The generator provides surgeons with the type of current required by HF instruments to achieve the desired tissue effect.

The yellow switch on the handle and the foot pedal activates the cutting current, whereas the blue switch activates the coagulating current. This colour code is an international standard.

In monopolar HF surgery, current flows from the active electrode through the tissue to the neutral electrode. In bipolar HF surgery, two active (and usually equal) electrodes are integrated into the instrument. Current only flows in the specific tissue region grasped between the two electrodes. A neutral electrode is therefore not required.

Key factors to achieve the desired tissue effects include:

  • Tissue impedance
  • Electrode geometry (current density)
  • Amount of energy introduced
  • Application duration
  • Type of current applied
  • Homogeneous surface coagulation with limited penetration depth
  • Contactless procedure results in no tissue sticking to the electrode
  • Low smoke production, i.e. better view of the operating field

Bipolar vessel sealing can be used to seal vessels up to 7 mm. The sealing cycle is controlled by the generator and sealing mode. An autostop signal automatically ends the process. Using this vessel sealing technology reduces the need for clips and ligatures.

Neutral electrodes are designed to close the current circuit between the patient and the HF generator. Neutral electrodes are only required in monopolar technique.

Neutral electrodes are attached to the patient's skin over a large area and without wrinkles. Where possible, depending on the location of the surgical site, place the neutral electrode on the nearest upper thigh or upper arm. Always make sure to keep a minimum distance of 20 cm between electrode and surgical site. The path of the current must not pass through the heart!

To minimise current density and, thus, local heating. This prevents any risk of thermal lesions on the surface of the skin.


BOWA ACADEMY actively supports professional users and distribution partners worldwide with specialist information – such as brochures, quick guides, webinars and online courses – for your safe handling of BOWA MEDICAL products. The offer includes high-quality training modules and further education events that are continuously developed with leading surgical institutions and the medical technology industry. Goal of the BOWA ACADEMY Safe use of energy-based surgery for the benefit of patients!