High-frequency surgical device
AssigneeErbe Elektromedizin GmbH
InventorMartin Hagg
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Abstract
A high-frequency surgical device having a high-frequency generator, which produces a high-frequency output signal for treating, in particular for cutting or coagulating, biological tissue, the high-frequency generator being designed in such a way that the output signal of the high-frequency generator has a predetermined fundamental frequency and a modulation apparatus being provided, which is used to modulate the output signal with a modulation frequency, the modulation frequency being smaller than the fundamental frequency. The high-frequency surgical device is characterized in that the modulation frequency is at least 100 kHz, and in that the output signal can be modulated in such a way that a crest factor of the modulated output signal suitable for a specific application of the high-frequency surgical device arises.
Claims13
A high-frequency surgical device having a high-frequency generator that produces a high-frequency output signal for treating, in particular for cutting or coagulating, biological tissue, the high-frequency generator being configured such that the output signal of the high-frequency generator has a predetermined fundamental frequency and further configured to form a closed electric circuit with the biological tissue;
- the high-frequency generator comprising a modulation apparatus used to modulate the output signal with a modulation frequency, the modulation frequency being smaller than the fundamental frequency,
- wherein the modulation frequency is at least 100 kHz, and the output signal can be modulated such that a crest factor of the modulated output signal is adjustable within a range between 5 and 15, and
- wherein the high-frequency generator is configured such that the modulation frequency and the crest factor of the modulated output signal control sparks between an active electrode and the biological tissue to provide a coagulation mode with reduced neuromuscular stimulation.
A method for operating a high-frequency surgical device having a high-frequency generator for producing a high-frequency output signal with a fundamental frequency for treating, in particular for cutting or coagulating, biological tissue, the method comprising:
- forming a closed electric circuit between the high-frequency generator and the biological tissue;
- modulating the output signal with a modulation frequency which is smaller than the fundamental frequency such that a crest factor of the modulated output signal is adjustable within a range between 5 and 15;
- and
- modulating the fundamental frequency with a modulation frequency of at least 100 kHz;
- and
- controlling sparks between an active electrode and the biological tissue to provide a coagulation mode with reduced neuromuscular stimulation as a result of the modulation frequency and the crest factor of the modulated output signal.
Dependencies are inferred from the claim text.