High frequency surgical generator comprising an additional transformer
AssigneeErbe Elektromedizin GmbH
InventorsHeiko Schall, Erich Werner, Marc Kegreiss, Jürgen Beller
Life of this patent
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Abstract
An HF surgical appliance comprising an HF generator having an output circuit, which contains an output transformer and has an output impedance. Output terminals, to which an HF surgical instrument can be connected, are provided, said instrument supplying a high-frequency current with a specific frequency into tissue to treat the same. An additional output circuit containing an additional transformer, which is connected between the output circuit and the output terminals to reduce the output impedance is also provided. In this way, the HF surgical appliance can be operated with a high power output even on loads having low impedance.
Claims7
An HF surgical appliance comprising:
- an HF generator having an output circuit, said output circuit comprising an output transformer, an output impedance and output terminals, to which an HF surgical instrument can be connected, the HF surgical instrument configured to supply a high-frequency current with a specific frequency used for treating tissue;
- and
- an additional output circuit containing an additional transformer that is connected between the output circuit and the output terminals to reduce the output impedance, wherein
- the additional transformer has more turns in a primary winding than in a secondary winding in order to reduce the output impedance;
- the additional output circuit comprises a resonant circuit whose resonance frequency is higher than the specific frequency of the HF generator, and
- wherein the additional output circuit is embodied as an external additional appliance outside the HF surgical appliance.
An HF surgical appliance comprising:
- an HF generator having an output circuit, said output circuit comprising an output transformer, an output impedance and output terminals, to which an HF surgical instrument can be connected, the HF surgical instrument configured to supply a high-frequency current with a specific frequency used for treating tissue;
- and
- an additional output circuit containing an additional transformer that is connected between the output circuit and the output terminals to reduce the output impedance, wherein
- the additional transformer has more turns in a primary winding than in a secondary winding in order to reduce the output impedance;
- the additional output circuit comprises a resonant circuit whose resonance frequency is higher than the specific frequency of the HF generator, and
- the additional output circuit is mounted in the HF-surgical appliance.
Dependencies are inferred from the claim text.