CN103417292A - Electrosurgery simulation system - Google Patents
Electrosurgery simulation system Download PDFInfo
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- CN103417292A CN103417292A CN2013102224214A CN201310222421A CN103417292A CN 103417292 A CN103417292 A CN 103417292A CN 2013102224214 A CN2013102224214 A CN 2013102224214A CN 201310222421 A CN201310222421 A CN 201310222421A CN 103417292 A CN103417292 A CN 103417292A
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Abstract
The invention relates to an electrosurgery simulation system. The electrosurgery simulation system can simulate energy output of electrosurgery devices (such as an endotherm knife and a blood vessel closing system) and provide reasonable output parameters (such as frequency, power and duty ratio) for researches of electrosurgery instruments through biological tissue cutting and closing experiments. The electrosurgery simulation system comprises a signal generator, a signal processing circuit, an impedance detection circuit, a main control unit and a power amplifier. The signal generator generates a high-frequency sine wave signal, amplitude and the duty ratio of the high-frequency sine wave signal are regulated through the signal processing circuit, and then the high-frequency sine wave signal is transmitted to the power amplifier. The radio frequency energy output by the power amplifier acts on biological tissues through special machines, the impedance detection circuit detects the output voltage and current in real time and feeds the output voltage and current back to the main control unit which controls gain of the processing circuit through feedback information, and then constant output is achieved.
Description
Technical field
The present invention relates to a kind of electrosurgery unit, the experimental system that particularly a kind of energy output that can the analog electrical surgical device, and parameter is easily regulated.
Background technology
Along with the development of medical apparatus and instruments, increasing traditional surgery is replaced by Minimally Invasive Surgery.In micro-wound surgical operation, often to tissue, be cut, be condensed and closed etc., this has just promoted the develop rapidly of electrosurgery equipment.
At present the electrosurgery unit that uses with hospital is sold on the market nearly all from external import by China, although the domestic product that oneself is also arranged, but its key components or dependence on import, and be that all with external product, there is a big difference for electronic circuitry design or processing technology.Therefore domestic hospital or research institution can only buy external product when doing this respect experiment, its price is not only expensive, and output parameter fixes, even be provided with several gears, also only can do limited selection to voltage, power, can't meet the demand of experiment.
Summary of the invention
The present invention is directed to the problems referred to above, designed a kind of output parameter and can regulate the electrosurgery analog systems.Its output mode has two kinds of constant voltage and firm powers, under different patterns, signal frequency, dutycycle, magnitude of voltage or performance number is regulated respectively; Find the weight order of parameter in adjustment process respectively, take that this is sequentially basis, carry out the combination of parameter and regulate, for different experiments, find optimum parameter combinations pattern.
The present invention to achieve these goals, can carry out following scheme:
The invention provides a kind of electrosurgery analog systems, can simulate the energy output of multiple electrosurgery equipment, and frequency, dutycycle, voltage and the power parameter of regulation output signal easily, realize the output of constant voltage mode or permanent power mode, constant voltage mode refers to that the voltage peak-to-peak value of electrosurgery analog systems output waveform is constant, permanent power mode refers to that the performance number of electrosurgery analog systems output is constant, it is characterized in that having: signal generator, signal conditioning circuit comprises: gain amplifier, analog switch and a plurality of follower, power amplifier, impedance detection circuit, main control unit, comprise button, wherein, the high_frequency sine wave signal that signal generator produces, the input gain amplifier, export high frequency small-signal after the multiple of voltage amplification of regulating sine wave signal through gain amplifier, high frequency small-signal amplifies output via power amplifier, then by apparatus, the radio-frequency (RF) energy of power amplifier output is acted in biological tissue, voltage in impedance detection circuit detection power amplifier output radio-frequency (RF) energy and the numerical value of electric current, calculated the impedance variation value of biological tissue by main control unit by voltage and curent change in the output radio-frequency (RF) energy, and the radio-frequency (RF) energy and the radio-frequency (RF) energy of exporting the constant voltage peak-to-peak value of being regulated the amplification realization output firm power of gain amplifier by main control unit, main control unit produces a pulse-width signal and carrys out opening and turn-offing of control simulation switch, realize the adjusting of the dutycycle of high frequency small-signal.
The electrosurgery analog systems the present invention relates to, be connected the first follower between the input of signal conditioning circuit and gain amplifier, be connected the second follower between gain amplifier and analog switch, between the outfan of analog switch and signal conditioning circuit, be connected the 3rd follower.
The invention effect
Electrosurgery analog systems involved in the present invention, can simulate the common electrosurgery units such as high frequency electric knife, vessel sealing system fully on function, and on this basis, broken through the fixing restriction of existing electrosurgery unit output energy parameter, the experiment such as can be cut for different biological tissues, closed, to the research radio-frequency (RF) energy, to the thermal effect of tissue, directive function should be arranged.
The accompanying drawing explanation
Fig. 1 is electrosurgery analog systems structural representation block diagram involved in the present invention.
Fig. 2 is the schematic diagram of signal conditioning circuit.
The specific embodiment
Preferred embodiment below in conjunction with accompanying drawing to a kind of electrosurgery analog systems that the present invention relates to elaborates, but the present invention is not limited in this embodiment.In order to make the public have thoroughly and understand the present invention, in the following preferred embodiment of the present invention, elaborated detail.
Fig. 1 is electrosurgery analog systems structural representation block diagram involved in the present invention.
As shown in Figure 1, electrosurgery analog systems 100 is by signal generator 101, signal conditioning circuit 102, power amplifier 103, impedance detection circuit 104, main control unit 105 and electrosurgical unit 106.Signal conditioning circuit 102 has preferably been used AD603 type gain amplifier 201, ADG1436 type simulated switch and AD8671 type follower 203, main control unit 105 has preferably been used XMega128A1 chip 501, XMega128A1 chip 501 can produce a pwm signal, also comprise reset key and four groups of regulating keys, for the power of output signal that electrosurgery analog systems 100 is set and the size of voltage.The frequency of the output signal of electrosurgery analog systems 100 can arrange by conditioning signal generator 101 the frequency size of output signal.
The output of the signalization generator 101 of electrosurgery analog systems 100, waveform is sinusoidal wave, and frequency range is generally between 200kHz-600kHz, and peak value is between 20mv-60mv.
The high_frequency sine wave signal that signal generator 1 is occurred is connected to the input of signal conditioning circuit 102 by the BNC line of one 50 ohm, the high_frequency sine wave signal is through the operation amplifier of the AD603 of signal conditioning circuit 102 type gain amplifier 201, the output high frequency small-signal, outfan at signal conditioning circuit 102 is connected to the input of power amplifier 103 equally with the BNC line of 50 ohm, high frequency small-signal carries out voltage amplification through power amplifier 103.
The outfan of power amplifier 103 is connected on specific apparatus 106 via impedance detection circuit 104 by the BNC wire of Band clamp, and the radio-frequency (RF) energy of power amplifier 103 outputs of electrosurgery analog systems 100 acts in biological tissue by apparatus 106.Can obtain by the amplification of rated output amplifier 103 and the gain multiple of AD603 type gain amplifier 201 voltage peak-to-peak value and the power stage set, and the frequency of this output is to be determined by signal generator 101.
When power amplifier 103 outputs of electrosurgery analog systems 100 act on human body skin or tissue by apparatus 106, under the effect of heat effect, bio-impedance changes.The voltage that impedance detection unit 104 is exported power amplifier in radio-frequency (RF) energy by two transformators is converted into the small-signal of two low pressure with electric current, then differential signal is become to single-ended signal, through over commutation, finally utilize virtual value to transform chip and be converted into two direct current signals again.There is certain linear relationship between the voltage and current signal of these two direct current signals with power amplifier output, the resistance value of load can be tried to achieve by calculation correction, voltage value and the current values of the output of electrosurgery analog systems 100 can be obtained by impedance detection unit 104.
Output voltage and output current by known power amplifier 103 outfans, main control unit 105 can calculate the value of target impedance, the AD603 type gain amplifier 201 amplifier coefficients of main control unit 105 conditioning signal modulate circuits 102, can control voltage peak-to-peak value and the power of the output waveform of electrosurgery analog systems 100.Lasting feedback and calculating and the control of main control unit 105 by impedance detection unit 104, can realize constant voltage output mode or firm power output mode so that control electrosurgery analog systems 100.
The schematic diagram that Fig. 2 is signal conditioning circuit.
As shown in Figure 2, between the input of signal conditioning circuit 102 and AD603 type gain amplifying circuit 201, be connected with an AD8671 follower 203, the 6th pin of AD8671 follower 203 is connected with the 3rd pin of an AD603 type gain amplifier 201.Be connected with the 2nd AD8671 follower 203 between AD603 type gain amplifier 201 and ADG1436 type simulated switch 203, the 7th pin of AD603 type gain amplifier 201 is connected with the 3rd pin of the 2nd AD8671 follower 203, and the 2nd AD8671 follower 203 is connected to the 2nd pin of ADG1436 type simulated switch 203.Be connected with the 3rd AD8671 follower 203 between the outfan of ADG1436 type simulated switch 203 and signal conditioning circuit 102, the 3rd pin of ADG1436 type simulated switch 203 is connected to the 3rd pin of the 3rd AD8671 follower 203, and the 6th pin of the 3rd AD8671 follower 203 is connected to outfan.Above-mentioned the first～three AD8671 follower 203 has played the effect of eliminating load effect.
Embodiment mono-:
Constant voltage mode, refer to that the peak-to-peak value of voltage of the output of electrosurgical operation system 100 remains on a predefined numerical value, and the button of the regulation voltage that this voltage value can be provided with by main control unit 105 presets.
Send sine wave signal from signal generator 101, AD603 type gain amplifier 201 via signal conditioning circuit 102 obtains high frequency small-signal, through signal amplifier 103, the voltage amplification of high frequency small-signal is arrived to the value of the power of setting and the peak-to-peak value of voltage again, performance number is calculated by XMega128A1 chip 501 according to the formula of formula P=UI=U^2/R.
When signal amplifier 103 outputs act in biological tissue by apparatus 106, under heat effect, when bio-impedance changes, the impedance of biological tissue can increase along with the effect of high-frequency energy again, when changing, load impedance also can cause the amplification of power amplifier 103 to change simultaneously, when the peak-to-peak value of the output voltage detected when impedance detection circuit 104 is less than setting value, the amplification of main control unit 105 rising AD603 type gain amplifiers 201, be elevated to setting voltage value by the peak-to-peak value of output voltage; When the peak-to-peak value of the output voltage detected when impedance detection circuit 104 is greater than setting value, main control unit 105 reduces the amplification of AD603 type gain amplifiers 201, and the peak-to-peak value of output voltage is reduced to setting voltage value.
Embodiment bis-:
Permanent power mode, refer to that the output of electrosurgical operation system 100 remains on a predefined numerical value.
Send sine wave signal from signal generator 101, AD603 type gain amplifier 201 via signal conditioning circuit 102, through signal amplifier 103, the voltage amplification of high frequency small-signal is arrived to the value of the power of setting and the peak-to-peak value of voltage again, performance number is calculated by XMega128A1 chip 501 according to the formula of formula P=UI=U^2/R.
When signal amplifier 103 outputs act in biological tissue by apparatus 106, under heat effect, bio-impedance can change, the impedance of biological tissue can increase along with the effect of high-frequency energy again, when changing, load impedance can cause the amplification of power amplifier 103 to change, now, output voltage and output current all can cause because of the variation of bio-impedance corresponding variation.As formula: P=U^2/R learns, when impedance R value changes, it is a relative constant that output voltage U must have corresponding variation to make the value of power.Impedance detection circuit 104 will be calculated target impedance according to output voltage and the output current of real-time electrosurgical operation system 100, and the value of calculation of its target impedance is fed back to main control unit 105, main control unit 105 is by regulating AD603 type gain amplifier 201, by the mode of regulation voltage, make the output of electrosurgical operation system 100 remain on a predefined numerical value.
Claims (2)
1. an electrosurgery analog systems, can simulate the energy output of multiple electrosurgery equipment, and frequency, dutycycle, voltage and the power parameter of regulation output signal easily, realize the output of constant voltage mode or permanent power mode, described constant voltage mode refers to that the voltage peak-to-peak value of electrosurgery analog systems output waveform is constant, described permanent power mode refers to that the performance number of electrosurgery analog systems output is constant, it is characterized in that having:
Signal generator;
Signal conditioning circuit comprises: gain amplifier, analog switch and a plurality of follower;
Power amplifier;
Impedance detection circuit;
Main control unit, comprise button;
Wherein, the high_frequency sine wave signal that signal generator produces, input described gain amplifier, export high frequency small-signal after the multiple of voltage amplification of regulating described high_frequency sine wave signal through described gain amplifier, described high frequency small-signal amplifies output via described power amplifier, and by apparatus, the radio-frequency (RF) energy of described power amplifier output is acted in biological tissue
Voltage in described impedance detection circuit detection power amplifier output radio-frequency (RF) energy and the numerical value of electric current, and calculated the variation of the resistance value of described biological tissue by described main control unit according to the numerical value of described voltage and electric current, the amplification of then by described main control unit, regulating described gain amplifier realizes respectively exporting the radio-frequency (RF) energy of firm power and the radio-frequency (RF) energy of output constant voltage peak-to-peak value
Described main control unit produces a pulse-width signal and controls opening and turn-offing of described analog switch, realizes the adjusting of the dutycycle of described high frequency small-signal.
2. electrosurgery analog systems according to claim 1 is characterized in that:
Wherein, be connected the first follower between the input of described signal conditioning circuit and described gain amplifier, be connected the second follower between described gain amplifier and described analog switch, between the outfan of described analog switch and described signal conditioning circuit, be connected the 3rd follower.
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| CN2013102224214A CN103417292A (en) | 2013-06-06 | 2013-06-06 | Electrosurgery simulation system |
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| CN2013102224214A CN103417292A (en) | 2013-06-06 | 2013-06-06 | Electrosurgery simulation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237830A (en) * | 2014-10-08 | 2014-12-24 | 洪明 | Circuit detection and verification signal simulating device with control interfaces |
| CN105496549A (en) * | 2015-10-29 | 2016-04-20 | 绵阳立德电子股份有限公司 | RF (radio frequency) generator and method for generating RF energy by using same |
| CN105832406A (en) * | 2016-01-25 | 2016-08-10 | 安进医疗科技（北京）有限公司 | Power control method, power control device, control equipment, control method and electromagnetic knife surgery system |
| WO2020154906A1 (en) * | 2019-01-29 | 2020-08-06 | 深圳市科曼医疗设备有限公司 | Constant-current stimulation circuit with dynamic voltage adjustment |
| CN112807072A (en) * | 2020-12-31 | 2021-05-18 | 杭州堃博生物科技有限公司 | Radio frequency generating circuit, device and method |
| CN113030572A (en) * | 2021-02-26 | 2021-06-25 | 佛山市中研非晶科技股份有限公司 | Magnetic core impedance characteristic analysis method and magnetic core impedance test system applying same |
| CN115227341A (en) * | 2022-06-17 | 2022-10-25 | 江苏邦士医疗科技有限公司 | Ultrasonic and plasma dual-output surgical operation system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237830A (en) * | 2014-10-08 | 2014-12-24 | 洪明 | Circuit detection and verification signal simulating device with control interfaces |
| CN105496549A (en) * | 2015-10-29 | 2016-04-20 | 绵阳立德电子股份有限公司 | RF (radio frequency) generator and method for generating RF energy by using same |
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| WO2020154906A1 (en) * | 2019-01-29 | 2020-08-06 | 深圳市科曼医疗设备有限公司 | Constant-current stimulation circuit with dynamic voltage adjustment |
| CN112807072A (en) * | 2020-12-31 | 2021-05-18 | 杭州堃博生物科技有限公司 | Radio frequency generating circuit, device and method |
| CN113030572A (en) * | 2021-02-26 | 2021-06-25 | 佛山市中研非晶科技股份有限公司 | Magnetic core impedance characteristic analysis method and magnetic core impedance test system applying same |
| CN115227341A (en) * | 2022-06-17 | 2022-10-25 | 江苏邦士医疗科技有限公司 | Ultrasonic and plasma dual-output surgical operation system |
| CN115227341B (en) * | 2022-06-17 | 2024-04-19 | 邦士医疗科技股份有限公司 | Ultrasonic and plasma double-output surgical operation system |
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Application publication date: 20131204 |