CN100396250C - Electrosurgical generator and system - Google Patents
Electrosurgical generator and system Download PDFInfo
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- CN100396250C CN100396250C CNB200480004382XA CN200480004382A CN100396250C CN 100396250 C CN100396250 C CN 100396250C CN B200480004382X A CNB200480004382X A CN B200480004382XA CN 200480004382 A CN200480004382 A CN 200480004382A CN 100396250 C CN100396250 C CN 100396250C
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Abstract
An electrosurgical system includes a generator (10) for generating radio frequency power, and an electrosurgical instrument (12) including at least three electrodes (2) (3) and (40). The generator includes a radio frequency output stage having at least a pair of RF output lines (60C), and a power supply (66) coupled to the output stage for supplying power to the output stage. A controller (72) is operable to limit the radio frequency output voltage developed across the output lines to at least a first predetermined threshold value to produce a cutting RF waveform, and a second threshold value to produce a coagulating RF waveform. In a combined mode, the controller (72) delivers both cutting and coagulating waveforms, either simultaneously or by alternating constantly between the first and second threshold values to form a blended signal. The system also includes means for feeding the waveform to the three or more electrodes such that the cutting RF waveform is delivered between a first pair (2, 3) of the electrodes, and the coagulating waveform is delivered between a second pair (3, 40) of the electrodes.
Description
Technical field
The present invention relates to Electrosurgical generator, and relate to a kind of Electrosurgical system, it comprises generator and electrosurgical unit, and described electrosurgical unit comprises two or more therapeutic electrodes.The cutting that this type systematic is generally used for organizing in the surgical intervention and/or solidify wherein is most frequently used in " main otch " or minimally-invasive surgery, but also is used in laparoscopic surgery or " opening " surgery.
Background technology
Well-known is that a kind of Electrosurgical generator need be provided, and this Electrosurgical generator gives mixed signal for cutting and solidifying the radiofrequency signal that provides different; In this mixed signal generator, between the signal that cuts and solidify, alternately change rapidly.Our U.S. Pat 6,416,509 and the U.S. Pat 3,885,569 of authorizing Judson have been described such mixed signal.
Summary of the invention
The present invention makes improvements this class Electrosurgical system, wherein, cutting and coag waveform is sent to the different electrodes of electrosurgical unit.So, a kind of Electrosurgical system is provided, it comprises: be used to produce the generator system of radio frequency (RF) power, and the electrosurgical unit that comprises at least 3 electrodes.Described generator system comprises one or more radio frequency power outputs source and a controller, described controller can be handled the control generator system, make described generator system transmit the first cutting radio frequency waveform or to transmit second and solidify radio frequency waveform, and transmit first and second radio frequency waveforms by integrated mode to electrosurgical unit to electrosurgical unit.Described system also comprises the device that is used for providing to 3 or a plurality of electrode radio frequency waveform, so that the cutting radio frequency waveform under the integrated mode transmits between first counter electrode in 3 or a plurality of electrode, and solidify radio frequency waveform and between second counter electrode in 3 or a plurality of electrode, transmit.
Our pending trial European patent application EP 02255826.6 has been described a kind of Electrosurgical system, and wherein, operator can select between cutoff signal and coagulation signal.When selecting cutoff signal, branch electrode provides cutoff signal outside a pair of, when selecting coagulation signal, provides coagulation signal to another external branch electrode.The present invention makes improvements this system, wherein, also provides a kind of operator scheme of combination, but has different composite signal components, and they offer different outer branch electrode groups.
" integrated mode " of generator can be provided by different mode.In a kind of equipment, generator system comprises an independent radio frequency power source, can make generator system provide the first cutting radio frequency waveform and second to solidify continuous alternate between the radio frequency waveform by the integrated mode steering controller.This is more traditional U.S. Pat 6,416,509 and " mixing " signal of US 3,885,569.According to another kind of mode, described generator system comprises first and second radio frequency power sources by different frequency work at least, first radio frequency power source is suitable for transmitting the first cutting radio frequency waveform, second radio frequency power source is suitable for transmitting second and solidifies radio frequency waveform, and can be by the integrated mode steering controller, make generator system transmit the first and second two kinds of radio frequency waveforms simultaneously.This is a kind of different equipment, wherein provides two radio frequency source outputs simultaneously to apparatus.But when described apparatus was in use, the effect of these two kinds of equipment all was cutting to be provided and to solidify two kinds of radiofrequency signals to electrosurgical unit.
Using under the alternative mixed signal situation, the device that connects waveform in the usual way can comprise an on-off circuit, be used for the connection between change source and 3 or a plurality of electrode, make under integrated mode, between first counter electrode in 3 or a plurality of electrode, transmit the first of composite signal, promptly cut radio frequency waveform, and between second counter electrode in 3 or a plurality of electrode, transmit the second portion of composite signal, promptly solidify radio frequency waveform.
In the equipment of a routine, the on-off circuit of generator is become: under integrated mode, connection between Switching power and the electrode makes between first and second electrodes first that transmits mixed signal, and second and third electrode between transmit the second portion of mixed signal.This equipment has a public electrode, and this public electrode is used in cutting and solidifies in these two kinds of operations, and still, for each function, it also is practicable having diverse electrode pair.
Described on-off circuit preferably includes first and second inputs and connects, first, second is connected with the 3rd output, and electrical switch, this electrical switch is connected between the first and second output connections, it and be suitable for opening and closed connect so that can periodically interconnect first and second outputs.Electrical switch is opened in the usual way under the frequency between the 5-100 hertz and is closed.In this equipment, the second and the 3rd output is connected and preferably interconnects through a capacitor, the value of capacitor usually 1 and 10nF between.On-off circuit is installed in the electrosurgical unit in the usual way, though also can select other mode to be installed in the Electrosurgical generator.
According to routine, controller in the described generator is suitable for determining moment of changing between first and second parts of composite signal, and on-off circuit is synchronously moved, in response to this so that transmit first and second parts of composite signal respectively to first and second counter electrode.As other selection, described on-off circuit is suitable for determining moment of changing between first and second parts of composite signal, and controller is suitable for responding this and moves.
Provide under the situation of composite signal at first and second radio frequency sources by effect simultaneously, the device that is used for connecting waveform has one or more output stages usually, described one or more output stages are arranged such that from the cutting radio frequency waveform of first radio frequency source between first counter electrode in 3 or a plurality of electrode, transmit, and between second counter electrode in 3 or a plurality of electrode, transmit from the radio frequency waveform that solidifies of second radio frequency source.In this way, first and second radio frequency sources are " hardwires ", and it connects to different output, and therefore transmit their corresponding waveform to different electrode pairs.So, no longer need to use on-off circuit that actual switching is carried out in described connection, but operating two required power requirements of radio frequency source may make this structure not be suitable for some equipment, such as the equipment of those portable parts, the generator system in this equipment is contained in the electrosurgical unit.
The present invention also addresses a kind of Electrosurgical system, and described Electrosurgical system comprises the electrosurgical unit that is used to produce the generator system of radio-frequency power and comprises at least 3 electrodes.Described generator system comprises at least one RF output, is used for providing at least one RF output the device of power, and controller, the radio frequency output voltage that it can operating handle be produced by at least one output stage is defined as and is used to cut or first predetermined threshold that evaporates and second predetermined threshold that is used to solidify, and transmits the waveform that is restricted to first and second threshold values under integrated mode.Described Electrosurgical system also comprises the device that is used for described waveform is coupled to 3 or a plurality of electrodes, so that between first electrode pair in 3 or a plurality of electrode, be transmitted in the waveform that cuts or evaporate of being used to that integrated mode is restricted to first threshold, between second electrode pair in 3 or a plurality of electrode, transmit the waveform that is used to solidify that is restricted to second threshold value.
The present invention also addresses a kind of Electrosurgical generator, is used for providing radio-frequency power to electrosurgical unit.Described Electrosurgical generator comprises: at least one RF output; Be used for transmitting 3 or a plurality of output connection of radio-frequency power to electrosurgical unit; Be used for providing the device of electric energy at least one output stage; A controller, the radio frequency output voltage that it can operating handle be produced by at least one output stage is defined as and is used to cut or first predetermined threshold that evaporates and second predetermined threshold that is used to solidify, and transmits two kinds of waveforms that are restricted to first and second threshold values under combination die; Be used for described waveform is added to the device of 3 or a plurality of electrodes, so that between first electrode pair in 3 or a plurality of electrode, transmit the waveform that cuts or evaporate of being used to that is restricted to first threshold by integrated mode, between second electrode pair in 3 or a plurality of electrode, transmit the waveform that is used to solidify that is restricted to second threshold value.
The present invention also is a kind of Electrosurgical system, and it comprises: the generator that is used to produce radio-frequency power; The electrosurgical unit that comprises at least two electrodes.Described generator comprises: RF output, this output stage have two or more outputs and connect, each all be in at least two electrodes in a corresponding electrode be electrically connected time; Power supply, it and described output stage couple, and are used for providing electric energy to output stage; Controller, it can be handled and described output is connected radio frequency output voltage that two ends produce be defined as and be used to cut or at least one first predetermined threshold that evaporates and second predetermined threshold that is used to solidify, and is defined as between first and second threshold values constantly alternate under mixed model; Adjusting device, can be by user's operation of Electrosurgical system, be used to change the ratio of mixed model, thereby compare, change the partially mixed signal be restricted to the first threshold that is used to cut or evaporates with the partially mixed signal that is restricted to second threshold value that is used to solidify.
The Electrosurgical system of U.S. Pat 6416509 make must mixed signal frequency set in advance with the electrode type coupling of preparing to use.Do not mention in the U.S. Pat 6416509 at all and can set in advance mixing ratio (promptly being used to cut or evaporate the ratio of the part of signal with respect to part that is used for coagulation signal in the mixed signal and mixed signal), more not knowing where to begin, whether easy user by system regulates.Preferably, realize described adjusting device, also adjusting device can be installed on the generator by electrosurgical unit.
Description of drawings
Further describe the present invention with reference to the accompanying drawings and by example, wherein:
Fig. 1 is the sketch map of Electrosurgical system of the present invention;
Fig. 2 is the block chart of generator among Fig. 1;
Fig. 3 is the perspective illustration as the used electrosurgical unit of Fig. 1 system part;
Fig. 4 is the sketch map of used on-off circuit in Fig. 1 system;
Fig. 5 A and 5B are the circuit diagrams that is used for two electronic switching devices of Fig. 4 on-off circuit;
Fig. 6 is the sketch map that can be used on the available embodiment of the on-off circuit in Fig. 1 system;
Fig. 7 is the block chart of Fig. 2 generator, has wherein added the on-off circuit of Fig. 4;
Fig. 8 A-8C is the technology sketch map that explanation is used to regulate the hybrid switch ratio, and wherein Fig. 8 A and 8C are the circuit diagrams of alternative ratio control device, and Fig. 8 B is the oscillogram of key diagram 8A device working condition;
Fig. 9 is the block chart of an alternative embodiment of generator system of the present invention;
Figure 10 is the block chart of another alternative generator system of the present invention;
Figure 11 A and 11B provide another alternative system of cutting and solidifying output from the variant electrode pair of trend.
The specific embodiment
Following with reference to accompanying drawing 1, generator 10 has accessory power outlet 10S, provides radio frequency (RF) output through connecting flexible cord 14 for apparatus 12.As shown in FIG., can realize actuation generator through the connection of flexible cord 14, perhaps step on unit 16 and realize actuation generator, connect flexible cord 18 by foot switch and make this foot step on the back that unit 16 is connected to generator by foot from apparatus 12.In an illustrated embodiment, foot is stepped on unit 16 two foot switch 16A, 16B is arranged, be respectively applied for select generator solidify pattern and cut mode.Generator front panel is provided with button 20,22, is respectively applied for to set the power level that solidifies and cut, and shows described power level in the display 24.Button 26 is set, as an alternative device, be used for solidify and cut mode between select.
With reference to Fig. 2, described generator comprises radio-frequency oscillator 60, and radio-frequency oscillator 60 has a pair of output lead 60C, is used to be coupled to apparatus 12.Fig. 2 instrument shown 12 is forms of electric load 64.Switched-mode power supply 66 provides electric energy to agitator 60.In this preferred embodiment, radio-frequency oscillator 60 is worked under about 400 KHz, all is practicable up to any frequency of HF scope upwards from 300 KHz.Switched-mode power supply is worked under the frequency in from 25 to 50 kilohertz range usually.At output lead 60C two ends coupled voltages threshold dector 68, the first outfan 68A of voltage threshold detector 68 is coupled to switched-mode power supply 16, and the second outfan 68B of voltage threshold detector 68 is coupled to " connection " time control circuit 70.The microprocessor controller 72 that is coupled to operator's controller and display (as shown in Figure 1) is connected to the control input end 66A of power supply 66, be used for regulating the output of generator by power source change, and microprocessor controller 72 is connected to the threshold setting input 68C of voltage threshold detector 68, is used to set peak value radio frequency output voltage limit value.
In the work process, when the surgeon need provide the electrosurgery electrical power when manipulation is located at (see figure 1) energizing switch device on portable parts or the foot switch, the controller 72 of microprocessor will add to switched-mode power supply 66 to power.According to the controller setting value of (see figure 1) on the generator front panel, on power supply, set a constant output voltage threshold value independently through input 68C.Generally speaking, for solidifying or drying, with the dry threshold value of this threshold setting between 150 volts and 200 volts.When requiring cutting or evaporation output, with the value of this threshold setting in scope from 250 or 300 volts to 600 volts.These magnitudes of voltage all are meant peak value." magnitude of voltage is a peak value " mean, at least for drying, the preferred practice is, before the given voltage, makes the output radio frequency waveform of low peak factor can provide maximum power at voltage clamping.Generally speaking, the peak factor that can realize is 1.5 or littler.When the needs integrated mode was exported, the voltage output through input 68C sets constantly changed between the value of drying or the value of solidifying and cutting or evaporation, forms mixed signal.
When the beginning actuation generator, the state of the control input end 60I of radio-frequency oscillator 60 (it links to each other with " connection " time control circuit 70) is " connection ", makes the power switching device of the oscillating element that forms agitator 60 connect maximum turn-on cycle from 1 in each cycle of oscillation.The power section ground that is sent to load 64 depends on the power supply power supply that adds to radio-frequency oscillator 60 from switched-mode power supply, and partly depends on load impedance 64.Set the voltage threshold of dry output, make and to deliver to triggering signal " connection " time control circuit 70, and when reaching voltage threshold, deliver to switched-mode power supply 66.The effect that " connection " time control circuit 70 produces is instantaneous virtually " connection " time that reduces radio-frequency oscillator-switching device shifter.Simultaneously, the work of disable switch mode power, thus make the voltage that is added on the agitator 60 begin to descend.In our European patent application EP
Describe this mode of operation of generator in 0754437 in detail, this paper is with reference to having quoted the disclosed content of this patent application.
Fig. 3 represents a kind of may designing of electrosurgical unit 12 that can be used for.Electrosurgical unit 12 comprises an instrument handle 5, and its far-end is an electrode assemblie 8.Electrode assemblie 8 comprises central cutting electrode 2, and it is located between two bigger coag electrodes 3 and 40, and insulating barrier 41 is separated the cutting electrode 2 and second coag electrodes 40.Cutting electrode 2 is given prominence to a bit above two coag electrodes slightly.
When the user want to cut and organize with this apparatus, generator perhaps added to the cutting radiofrequency signal in cutting electrode 2 and one of two coag electrodes 3 and 40 between the two.On the contrary, when the user want to solidify described organizing with this apparatus, generator added to coagulation radio-frequency signals between two coag electrodes 3 and 40.On-off circuit shown in 4 is described the process that adds to the hybrid radio frequency signal with reference to the accompanying drawings.
Fig. 4 represents one totally with 45 on-off circuits of representing.On-off circuit 45 comprises that input connects 46 and 47, and they are connected respectively to two output lead 60C of generator 10.On-off circuit 45 has 3 outputs and connects 48,49,50.Output connects 48 cutting electrodes 2 that are connected in the device of Fig. 3.Output connects 49,50 coag electrodes 3 and 40 that are connected respectively in the device of Fig. 3.Electronic switching device 51 is connected in output and connects between 48 and 49.The connection between the output connection 48 and 49 can promptly be set up and destroy to switch 51.Between output connects 49 and 50, connect capacitor 53, the value of capacitor 53 usually 1 and 10nF between.
When the user drove foot switch 16A or 16B and handles apparatus 12 in composite mode, generator connected 46, the 47 ALT pulse strings that radio frequency cutting and coagulation signal be provided to input.Switching device 51 is synchronously worked with described alternative radiofrequency signal, thereby when reception comprised the signal section of cutoff signal, switching device 51 was opened, thereby connects the circuit that has a unlatching between 48 and 49 in output.So connecting 48 and 49 through output respectively between cutting electrode 2 and coag electrodes 40 provides the cutting radiofrequency signal.On the contrary, between connecting 46 and 47, output receives when comprising the signal section of coagulation signal, switching device 51 closures, thereby output connection 48 and 49 each other can telecommunication.So, mixed signal solidify part during, can connect 49 and 50 through output between two coag electrodes 3 and 40 provide signal, capacitor 53 can provide a potential difference between the two.
Above description open synchronously and closed switching device 51 based on the generator 10 of control mixed mode signal with it.Yet, also being not limited to this situation, switching device can be controlled described generator, changes so that determine the counter-rotating between cutting radiofrequency signal and coagulation radio-frequency signals.
Consider to have switching device 45 as shown in Figure 4.When switching device 51 was in its opening, connecting 48 and 49 two ends in output provided cutoff signal.When switching device 51 closures, between connecting 48 and 49, the output that is separated by capacitor 53 begins to provide cutoff signal.This electric current that generator is transmitted promotes rapidly, so the action of the current limit circuit in the generator makes the power reduction of transmission, thereby described signal is converted generally be used to the radiofrequency signal of solidifying rapidly.The effect of the current limit circuit in the generator is, the closure of switching device 51 makes that the signal of transmission is almost instantaneous to convert coagulation signal to from cutoff signal.On the contrary, when opening switching device 51 once more, generator stops the electric current restriction, and signal oppositely becomes the cutting radiofrequency signal once more rapidly.Adopt this mode, the unlatching of switching device 51 and closure in cut mode and solidify between the pattern and to trigger described generator, produce the mixed signal of the electrode that offers apparatus 12.
Fig. 6 represents a kind of alternative on-off circuit embodiment, is not electric current restricted type generator at generator 10, perhaps wishes not use under the situation of generator current limit function, can use this on-off circuit.The on-off circuit of Fig. 6 is almost completely identical with the on-off circuit of Fig. 4, and main difference is to increase with input to be connected 46 placed in-line building-out condensers 52.The value of capacitor 52 generally is half of value of capacitor 53, thereby under the situation that does not reduce the output of generator 10 power, just can be divided into the level that is generally used for solidifying to the voltage that is sent to output connection 49,50 two ends.In this way, when switching device 51 is opened, between output connects 48,50, transmit cutoff signal, and when switching device 51 closures, between output connects 48,50, transmit coagulation radio-frequency signals.
In electrosurgical unit 12, perhaps, can provide commutation circuit 45 in the output stage of as shown in Figure 7 generator 10.No matter where commutation circuit 45 is positioned at, can provide an adjusting device 55 (as shown in Figure 6) for switching device shifter, adjusting device 55 can be by user's operation of system, to regulate the moment of switching device shifter.By operation adjusting device 55, the user can change the ratio between part of cutoff signal in the combined power signal and the coagulation signal part.No matter adjusting device 55 is positioned at still is positioned in the apparatus 12 in the generator 10, and the user of system can change described signal, and to increase or to reduce in the mixed signal with respect to the component that solidifies of cutting component, vice versa.This for as cutting and coagulation system use simultaneously Electrosurgical system sizable motility is arranged, the user can operate the share of solidifying that control provides.
As the above described equipment of Fig. 4 of pressing, the switching device 51 of the alternative on-off circuit of Fig. 6 can be shown in Fig. 5 A or Fig. 5 B, obtain to drive signal from the source that links to each other with switching device itself, perhaps the control circuit in the generator of controlling other generator function obtains described driving signal.
For the person of ordinary skill of the art, the various circuit of enforcement adjusting device 55 all are conspicuous.A kind of like this practical circuit of expression among Fig. 8 A, wherein, the element generation mixed mode signal by linking to each other with switching device, and described mixed mode signal have variable labelling/interval than.In this case, in comparator 57, the output of triangular-wave generator and the reference signal of user's adjusting are compared, produce the square-wave signal (Fig. 6) of switching device 51.Fig. 8 C represents another circuit, is used to produce adjustable mixed model switching device shifter control signal.Wherein, use the potentiometer 58 and timer circuit 59 of coupling user operation such as ic 555.
Fig. 9 represents an alternative generator system, wherein adopt two source circuits 74 and 74 '.Source circuits 74 comprises radio-frequency oscillator 60 and relevant power supply and control element thereof.This source circuits is described with reference to Fig. 2, similar elements use with Fig. 2 in identical label.Second source circuits 74 ' comprise, second radio-frequency oscillator 60 ', and second controller 72 ', power supply 66 ', voltage threshold detector 68 ' and turn-on time control circuit 70 '.Source circuits 74 shown in Figure 9 ' can have is by each is formed in the middle of these unit its version of controlling oneself, yet, certain in these unit some (as power supply 66 ' and controller 72 ') also can share with source circuits 74.With voltage threshold detector 68 ' be arranged to make from source circuits 74 ' output connect 60C ' and can provide and have the output signal that solidifies radio frequency waveform.Second agitator 60 ' operating frequency different with the operating frequency of agitator 60.
To a public output stage 73 of two source circuits 74 and 74 ' provide.The output of source circuits 74 connects the input that 60C is connected to output stage 73 and connects 46 and 47, source circuits 74 ' output connect input that 60C ' is connected respectively to output stage and connect 46 ' and 47 '.In output stage 73, input connects 47 and 47 ' the two all is connected 49 with output and connects, and input simultaneously connects 46 and is connected to output and connects 48, and input connects 46 ' be connected to output connection 50.The result of this layout is to export transmission between the connection 48 and 49 from the cutting radiofrequency signal of source circuits 74, thereby be sent to the pair of electrodes on the electrosurgical unit 12.Simultaneously, from source circuits 74 ' coagulation radio-frequency signals between output connects 49 and 50, transmit, and therefore be sent on the different electrode pair of apparatus 12.So electrosurgical unit 12 can side by side cut and solidified structure by means of the signal of two different frequencies.As previously discussed, its advantage is no matter cutoff signal and coagulation signal apply them simultaneously, and they are in the mixed signal, can both be sent to the different electrode pairs of electrosurgical unit.Therefore can be to intend being used to cut and organize or be used for the design that solidified structure is optimized these electrodes according to electrode.
Referring now to accompanying drawing 10, in the combination of another alternative generator and apparatus, give two radio-frequency oscillator 60-1 and 60-2 power supply by a public power 62, and by 72 controls of a common control unit, so that on the output lead 60C of correspondence, produce rf power signal that is suitable for cutting and the rf power signal that is suitable for solidifying.These signals can be added on the on-off circuit 63, so that according to for example selecting from an agitator 60-1 from the input of foot switch, or selection connects the selected power signal of transmission on 80,81 in output simultaneously from the power signal of another agitator 60-2.Under mixed model, repeatedly operate described switch with predetermined speed, produce blended output signal so that connect 80,81 two ends in output.Power oscillator 60-1 and 60-2 work under different frequency, and provide power signal by connecting on 80,81 in output to the tuning circuit 82-1 and the 82-2 that are tuned at different frequency, and corresponding cutting and coagulation signal are added to required electrode.The output of tuning circuit is coupled on the counter electrode of electrosurgical unit through electrode wires 48,49,50.In this way, be added on cutting electrode 48 and the public electrode 49 from the cutoff signal of agitator 60-1, and be added on coag electrodes 50 and the public electrode 49 from the coagulation signal of agitator 60-2.
In the embodiment shown in fig. 10, connect 80,81 connections that provide between Electrosurgical generator and the electrosurgical unit by output usually, but also can change the distribution of the circuit block between apparatus and generator.
Represent additional embodiments among Figure 11 A, the 11B.Similar with the embodiment of Fig. 9, these embodiment have saved the needs for signal routing switch or commutation circuit.
With reference to Figure 11, wherein, provide two tuning circuit 82-1,82-2 (as shown in figure 10) that are tuned on different frequency.Each tuning circuit all has the Inductor-Capacitor 84 of pair of series resonance and the Inductor-Capacitor 86 of a pair of parallel resonance, the Inductor-Capacitor of parallel resonance on the one hand transformer coupledly connects 46,47 to output to 86, transformer coupled on the other hand to output connect 46 ', 47 '.Shown in the embodiment of Figure 10, each tuning circuit all has two inputs, and an input is connected to the output connection 80 of generator, and the output that another input is connected to generator connects 81.In the present embodiment, the output stage of generator comprises a plurality of radio-frequency (RF) switch, and these radio-frequency (RF) switch are arranged to two recommending 90A, 90B and 91A, 91B of playing a role on the contrary.Generally speaking, these switches comprise power MOSFET.As shown in the figure, with each switch 90A, 90B and 91A, 91B is connected to the input 92 of driver, 93, input 92,93 received RFs drive signal, be used for connecting 80 in output, produce RF driving signal on 81 and be in a kind of rf frequency with waveform output, and be used for connecting 80 in output, produce RF driving signal on 81 and be in another different rf frequency with coag waveform output, these frequencies are respectively the resonance combinations 84 of the first tuning circuit 82-1,86 resonant frequency, the resonant frequency of the resonance combination of the correspondence of another tuning circuit 82-2.As mentioned above, can produce cutting output or solidify output according to output stage radio-frequency (RF) switch 90A, the 90B and 91A, the 91B that drive generator such as the control of foot switch.By way of parenthesis, can again produce and mix output, the alternate constantly between two resonant frequencies of tuning output circuit of rf frequency wherein.
The embodiment of Figure 11 B is the improvement to the embodiment of Figure 11 A, the output stage of generator wherein has radio-frequency (RF) switch 90A, a 90B single recommend right, and each tuning circuit wherein all has an input, and this input is connected to the junction surface between switch 90A, 90B and another input of being connected with ground.
Claims (17)
1. Electrosurgical system that comprises generator system and electrosurgical unit, generator system is used to produce radio-frequency power, and electrosurgical unit comprises instrument handle, and the far-end of this handle is an electrode assemblie, described electrode assemblie comprises at least 3 electrodes, and described generator system comprises:
(i) one or more radio frequency power output sources and
(ii) controller, described controller can be handled the described generator system of control, so that can be sent to electrosurgical unit to the first cutting radio frequency waveform, and solidify radio frequency waveform with second and be sent to electrosurgical unit, and can be under integrated mode, by transmitting first waveform and transmitting between second waveform alternate constantly, transmit first and second these two radio frequency waveforms;
Described system also comprises the device that is used for providing to 3 or a plurality of electrode described waveform, thereby can transmit the cutting radio frequency waveform between first counter electrode in 3 or a plurality of electrode under integrated mode, and transmits between second counter electrode and solidify radio frequency waveform.
2. Electrosurgical system according to claim 1, wherein, the device that is used to connect described waveform comprises selecting arrangement, be used for the coupling between change source and 3 or a plurality of electrode, make under integrated mode the first that between first counter electrode in 3 or a plurality of electrode, transmits composite signal, promptly cut radio frequency waveform, and between second counter electrode in 3 or a plurality of electrode, transmit the second portion of composite signal, promptly solidify radio frequency waveform.
3. Electrosurgical system according to claim 2, wherein, described selecting arrangement is an on-off circuit, and this on-off circuit comprises: first and second inputs connect, first, second is connected with the 3rd output, and are connected the electrical switches between the first and second output connections; Described electrical switch is suitable for opening and is closed, connects so that periodically interconnect first and second outputs.
4. Electrosurgical system according to claim 3, wherein, described electrical switch is opened between 5 and 100 hertz frequencies and is closed.
5. Electrosurgical system according to claim 3, wherein, the described second and the 3rd output is connected through capacitor and interconnects.
6. Electrosurgical system according to claim 5, wherein, the value of described capacitor 1 and 10nF between.
7. according to each described Electrosurgical system among the claim 2-6, wherein, described selecting arrangement is accommodated in the electrosurgical unit.
8. according to each described Electrosurgical system among the claim 2-6, wherein, described selecting arrangement is accommodated in the Electrosurgical generator.
9. according to each described Electrosurgical system among the claim 2-6, wherein, described controller is suitable for determining moment of changing between first and second parts of composite signal, and makes described selecting arrangement synchronous, so that move in response to this.
10. Electrosurgical system according to claim 7, wherein, described controller is suitable for determining moment of changing between first and second parts of composite signal, and makes described selecting arrangement synchronous, so that move in response to this.
11. Electrosurgical system according to claim 8, wherein, described controller is suitable for determining moment of changing between first and second parts of composite signal, and makes described selecting arrangement synchronous, so that move in response to this.
12. according to each described Electrosurgical system among the claim 2-6, wherein, described selecting arrangement is suitable for determining moment of changing between first and second parts of composite signal, and described controller is suitable for moving in response to this.
13. Electrosurgical system according to claim 7, wherein, described selecting arrangement is suitable for determining moment of changing between first and second parts of composite signal, and described controller is suitable for moving in response to this.
14. Electrosurgical system according to claim 8, wherein, described selecting arrangement is suitable for determining moment of changing between first and second parts of composite signal, and described controller is suitable for moving in response to this.
15. Electrosurgical system according to claim 1, wherein, a radio frequency power source can be worked when response controller, so that common output line on produce rf power signal, described rf power signal is solidifying between the radio frequency waveform constantly alternate by integrated mode transmitting the first cutting radio frequency waveform with first frequency and transmit second with second frequency; Be used for providing the device of waveform to comprise first and second resonance output circuit to electrode, first and second resonance output circuit are coupled on the described output lead, and be tuned to first and second frequencies respectively, first resonance output circuit is connected on first electrode pair, and second resonance output circuit is connected on second electrode pair.
16. Electrosurgical system according to claim 15, wherein, described controller and radio frequency power source can be worked together, so that when transmitting the cutting radio frequency waveform, peak value radio frequency output voltage is defined as first predetermined threshold, and when radio frequency waveform is solidified in transmission, peak value radio frequency output voltage is defined as second predetermined threshold.
17. Electrosurgical system according to claim 1, wherein, having radio frequency power source can work with controller, is defined as first predetermined threshold with the peak value radio frequency output voltage with first waveform, and the peak value radio frequency output voltage of second waveform is defined as second predetermined threshold.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0305018.4 | 2003-03-05 | ||
| GB0305018A GB0305018D0 (en) | 2003-03-05 | 2003-03-05 | Electrosurgical generator and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1750794A CN1750794A (en) | 2006-03-22 |
| CN100396250C true CN100396250C (en) | 2008-06-25 |
Family
ID=9954154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200480004382XA Expired - Lifetime CN100396250C (en) | 2003-03-05 | 2004-03-04 | Electrosurgical generator and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100396250C (en) |
| GB (1) | GB0305018D0 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2456533A (en) * | 2008-01-16 | 2009-07-22 | Gyrus Medical Ltd | Selection method for multi-instrument electrosurgical system |
| DE102011085501A1 (en) * | 2011-10-31 | 2013-05-02 | Söring GmbH | ESU |
| US9693816B2 (en) * | 2012-01-30 | 2017-07-04 | Covidien Lp | Electrosurgical apparatus with integrated energy sensing at tissue site |
| BR112015021441A2 (en) * | 2013-03-07 | 2017-07-18 | Arthrocare Corp | electrosurgical systems and methods |
| ITUB20152393A1 (en) * | 2015-07-22 | 2017-01-22 | Otech Ind S R L | ELECTROSURGERY APPARATUS TO PERFORM A CUTTING ACTION ON FABRICS OF A BODY OF A HUMAN OR ANIMAL PATIENT. |
| US11020166B2 (en) * | 2015-09-25 | 2021-06-01 | Gyrus Acmi, Inc. | Multifunctional medical device |
| KR20220132048A (en) * | 2017-12-19 | 2022-09-29 | 인튜어티브 서지컬 오퍼레이션즈 인코포레이티드 | Simultaneous electrosurgical sealing and cutting |
| DE102020108614A1 (en) * | 2020-03-27 | 2021-09-30 | Olympus Winter & Ibe Gmbh | Electrosurgery generator, electrosurgical system and method for operating an electrosurgery generator |
| PL3895642T3 (en) * | 2020-04-14 | 2024-01-15 | Erbe Elektromedizin Gmbh | Device for coagulation and/or dissection of biological tissue and a method of operating a device. |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160334A (en) * | 1991-04-30 | 1992-11-03 | Utah Medical Products, Inc. | Electrosurgical generator and suction apparatus |
| WO1996037156A1 (en) * | 1995-05-22 | 1996-11-28 | Issa Muta M | Resectoscope electrode assembly with simultaneous cutting and coagulation |
| US5658280A (en) * | 1995-05-22 | 1997-08-19 | Issa; Muta M. | Resectoscope electrode assembly with simultaneous cutting and coagulation |
| WO1998038932A1 (en) * | 1997-03-07 | 1998-09-11 | Advanced Closure Systems, Inc. | Resectoscope electrode assembly with simultaneous cutting and coagulation |
| CN1193268A (en) * | 1995-06-23 | 1998-09-16 | 盖拉斯医疗有限公司 | Electrosurgical instrument |
| US6416509B1 (en) * | 1995-06-23 | 2002-07-09 | Gyrus Medical Limited | Electrosurgical generator and system |
-
2003
- 2003-03-05 GB GB0305018A patent/GB0305018D0/en not_active Ceased
-
2004
- 2004-03-04 CN CNB200480004382XA patent/CN100396250C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5160334A (en) * | 1991-04-30 | 1992-11-03 | Utah Medical Products, Inc. | Electrosurgical generator and suction apparatus |
| WO1996037156A1 (en) * | 1995-05-22 | 1996-11-28 | Issa Muta M | Resectoscope electrode assembly with simultaneous cutting and coagulation |
| US5658280A (en) * | 1995-05-22 | 1997-08-19 | Issa; Muta M. | Resectoscope electrode assembly with simultaneous cutting and coagulation |
| CN1193268A (en) * | 1995-06-23 | 1998-09-16 | 盖拉斯医疗有限公司 | Electrosurgical instrument |
| US6416509B1 (en) * | 1995-06-23 | 2002-07-09 | Gyrus Medical Limited | Electrosurgical generator and system |
| WO1998038932A1 (en) * | 1997-03-07 | 1998-09-11 | Advanced Closure Systems, Inc. | Resectoscope electrode assembly with simultaneous cutting and coagulation |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0305018D0 (en) | 2003-04-09 |
| CN1750794A (en) | 2006-03-22 |
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