Active electrosurgical instrument
AssigneeErbe Elektromedizin GmbH
InventorsPeter Selig, Konstantin Dornhof
Life of this patent
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Abstract
The electrosurgical instrument (11) according to the invention comprises at least one electrode (15, 16) for electrically acting on biological tissue. The electrode is coupled with a radio frequency generator (20) that is arranged in direct proximity of electrode (15) and/or (16). The radio frequency generator oscillates in a self-controlled manner with a frequency between 100 kHz and 10 MHz and is preferably supplied by a constant or timely varying direct voltage. The instrument (11) is thus connected via a line supplying a low frequency voltage or direct voltage with a supplying source, e.g. an apparatus (19).
Claims15
An electrosurgical instrument (11) for treatment of human or animal patients, the electrosurgical instrument comprising:
- at least two electrodes (15, 16) configured to apply current to biological tissue (17);
- at least one radio frequency generator (20) configured as a push-pull-oscillator that comprises a supply voltage input (22) and a radio frequency output (21) connected to the at least two electrodes (15, 16), wherein the radio frequency generator (20) is configured to convert a temporally constant or temporally varying supply voltage into a radio frequency alternating voltage;
- and
- a line (18) connectable to a voltage source (27) for current supply of the radio frequency generator (20) at its supply voltage input (22);
- wherein the push-pull-oscillator comprises a push-pull flip-flop having two alternatingly switching transistors (T1, T2), the alternatingly switching transistors each comprising an output electrode to which a respective voltage amplifier (T3, T4) is connected.
Dependencies are inferred from the claim text.