High-frequency electrosurgery apparatus with limitation of effective value of current flowing through a surgical instrument
First Claim
1. A high frequency electrosurgery apparatus for cutting, coagulating, or simultaneously cutting and coagulating biological tissue comprising:
- a high frequency electric current generator having electric current outputs, electric current output parameters, and at least one mode of operation;
electromechanical manually accessible setting means for setting at least one of said electric current output parameters wherein one of said electric current output parameters is a maximal current intensity;
manually positionable applicator electrodes means for applying high frequency electric current to biological tissue;
an electric current intensity limiting system connected to said electromechanical setting means for limiting said current intensity delivered to said applicator electrode means, said electric current limiting system including detecting means for detecting a current intensity equal to or exceeding said maximal current intensity in said applicator electrode means; and
an alarm circuit connected to said detecting means responding to said current intensity equal to or exceeding said maximal current intensity in said detecting means for activating at least one of two means of said alarm circuit;
(a) means for shutting off said high frequency electric current generator;
(b) means for producing a warning signal.
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Accused Products
Abstract
A high-frequency electrosurgery apparatus for cutting and/or coagulating biological tissues that may have a number of operating modes is described. As control panel on which one or more parameters of the high-frequency output of the apparatus can be set. Particularly important is the current-limiting system which includes setting of a desired maximal current level, to which for a particular mode of operation the current can be limited or in response to which a warning signal may be activated and/or the high-frequency generator shut down. The effective current that the application instrument reaches or exceeds previously set maximal current level. In such a high-frequency electrosurgery apparatus the cable leading to the active electrode is provided with electrial shielding which is connected to the conductor leading to the neutral electrode at a location between the output transformer of the apparatus and the current sensor of the current limiting system.
453 Citations
22 Claims
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1. A high frequency electrosurgery apparatus for cutting, coagulating, or simultaneously cutting and coagulating biological tissue comprising:
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a high frequency electric current generator having electric current outputs, electric current output parameters, and at least one mode of operation; electromechanical manually accessible setting means for setting at least one of said electric current output parameters wherein one of said electric current output parameters is a maximal current intensity; manually positionable applicator electrodes means for applying high frequency electric current to biological tissue; an electric current intensity limiting system connected to said electromechanical setting means for limiting said current intensity delivered to said applicator electrode means, said electric current limiting system including detecting means for detecting a current intensity equal to or exceeding said maximal current intensity in said applicator electrode means; and an alarm circuit connected to said detecting means responding to said current intensity equal to or exceeding said maximal current intensity in said detecting means for activating at least one of two means of said alarm circuit; (a) means for shutting off said high frequency electric current generator; (b) means for producing a warning signal.
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2. A high frequency electrosurgery apparatus for cutting, coagulating, or simultaneously cutting and coagulating biological tissue comprising:
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a high frequency electric current generator having a readily selectable plurality of modes of operation, having a plurality of current outputs and current output parameters associated with each of said modes of operation, and further comprising a power supply component; electromechanical parameter setting means for setting said plurality of current output parameters wherein one of said current output parameters is a maximal current intensity and further comprising a manual setting means for setting said current output parameters; manually positionable applicator electrode means for applying high frequency electric current to biological tissues; electric current intensity limiting means for limiting said current intensity delivered to said applicator electrode means;
said electric current intensity limiting means further comprising detecting means for detecting a current intensity equal to or exceeding said maximal current intensity in said applicator electrode means; andalarm means for responding to detection of said current intensity equal to or exceeding said maximal current intensity in said detecting means and for activating at least one of two means; (a) means for shutting off said high frequency electric current generator, said power supply component, or both, (b) means for producing a warning signal. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification