Electric surgical high-frequency instrument
First Claim
1. An electric surgical high-frequency instrument comprising:
- an HF source having first and second outputs and a control input;
a first antifaradization capacitor, connected by electrical conductor to said first HF source output;
an active surgical treatment electrode, connected in circuit series by electrical conductor with said first antifaradization capacitor and said first HF source output;
an inactive tissue contact electrode, connected by electrical conductor to said second HF source output;
control circuit means for sensing direct current components and for controlling said HF source, said control circuit means comprising;
circuit means for detecting proportional discharge, having an input end and an output end, said input end connected to at least one of said active and inactive electrodes, said output end producing a proportional discharge signal; and
circuit means for comparing aid proportional discharge signal and an adjustable threshold signal, connected to said output end of said means for detecting proportional discharge, said circuit means for comparing providing an output signal connected to said control input of said HF source.
2 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to an electric surgical HF instrument having an HF urce (12) to which an inactive electrode (18) for tissue contact (17) and an active electrode (16) for surgical treatment can be connected via electrical conductors (15, 15'"'"'). The conductor of the active electrode (16) features an antifaradization capacitor (13). A control circuit (20, 21, 22, 23) for sensing a direct current component in the HF circuit is connected to at least one of the electrodes and furnishes an output signal for controlling the HF source (12). The control circuit features a proportional discharge detector circuit (20), the input end of which is connected via connecting leads (19, 19'"'"') and conductors (15, 15'"'"') to the electrodes (16, 18). The output of the discharge detector circuit (20) is connected to one input of a threshhold switch (22) which controls the HF source (12).
122 Citations
13 Claims
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1. An electric surgical high-frequency instrument comprising:
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an HF source having first and second outputs and a control input; a first antifaradization capacitor, connected by electrical conductor to said first HF source output; an active surgical treatment electrode, connected in circuit series by electrical conductor with said first antifaradization capacitor and said first HF source output; an inactive tissue contact electrode, connected by electrical conductor to said second HF source output; control circuit means for sensing direct current components and for controlling said HF source, said control circuit means comprising; circuit means for detecting proportional discharge, having an input end and an output end, said input end connected to at least one of said active and inactive electrodes, said output end producing a proportional discharge signal; and circuit means for comparing aid proportional discharge signal and an adjustable threshold signal, connected to said output end of said means for detecting proportional discharge, said circuit means for comparing providing an output signal connected to said control input of said HF source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electrical surgical high-frequency instrument comprising:
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an HF source, having first and second outputs and a control input; an antifaradization capacitor, connected by electrical conductor to said first HF source output; an active surgical treatment electrode, connected in circuit series by electrical conductor with said antifaradization capacitor and said first HF source output; an inactive tissue contact electrode, connected by electrical conductor to said second HF source output; control circuit means for sensing direct current components and for controlling said HF source, said control circuit means comprising; means for detecting proportional discharge, having an input end and an output end, said input end connected to at least one of said active and inactive electrodes, said output end producing a proportional discharge signal; means for providing DC decoupling, having an input and an output, said input of said means for providing DC decoupling being connected to said output end of said means for detecting proportional discharge; and circuit means for comparing said proportional discharge signal and an adjustable threshold signal, connected to said output of said means for providing DC decoupling, said circuit means for comparing providing an output signal connected to said control input of said HF source. - View Dependent Claims (9, 10)
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11. An electric surgical high-frequency instrument comprising:
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an HF source, having first and second outputs and a control input; an antifaradization capacitor, connected by electrical conductor to said first HF source output; circuit means for limiting drain current, having first and second inputs and first and second outputs, said first input of said circuit means connected in circuit series by electrical conductor with said antifaradization capacitor and said first HF source output, said second input of said circuit means connected by electrical conductor to said second HF source output; an active surgical treatment electrode, connected by electrical conductor with said first output of said circuit means for limiting drain current; an inactive tissue contact electrode, connected by electrical conductor to said second output of said circuit means for limiting drain current; control circuit means for sensing direct current components and for controlling said HF source, said control circuit means comprising; means for detecting proportional discharge, having an input end and an output end, said input end connected to at least one of said active and inactive electrodes, said output end producing a proportional discharge signal; and circuit means for comparing said proportional discharge signal and an adjustable threshold signal, connected to said output end of said means for detecting proportional discharge, said circuit means for comparing providing an output signal connected to said control input of said HF source. - View Dependent Claims (12, 13)
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Specification