A digital minimally invasive high-frequency energy working system

Abstract

The present invention relates to a digital minimally invasive high-frequency energy working system, wherein the output circuit of the high-frequency signal generator connected to the high-frequency power amplifier outputs a signal to the surgical electrode through a matching circuit; a coupling sampling circuit is provided between the high-frequency power amplifier and the surgical electrode for accurately and in real time sampling the load and transmitting it to the digital signal processing circuit for processing and calculation; the control circuit selects different matching circuits to adjust the output signal to constant power or output voltage amplitude according to the processing result of the digital signal processing circuit. The output signal frequency of the surgical electrode of the system of the present invention reaches more than 2MHz, the system has a high degree of intelligent digitization, high control accuracy, simple operation, safety and reliability, less thermal damage to the surrounding tissues of the human body, and can ideally realize digitally controlled constant power electrocution and electrocoagulation of different loads with large impedance range changes.

Description

Technical Field

[0001] The present invention relates to an electrosurgical instrument which transmits non-mechanical energy to the human body by heating tissue with high-frequency electromagnetic energy, and in particular to a digital minimally invasive high-frequency energy working system. Background Art

[0002] The digital minimally invasive high-frequency energy working system is an electrosurgical working system that replaces mechanical scalpels or traditional electric knives for tissue cutting or coagulation. It heats the tissue when the digitally controlled high-frequency energy generated by the effective electrode tip contacts the patient's body, achieving the separation or destruction of human tissue, thereby achieving the minimally invasive purpose of cutting and hemostasis.

[0003] Most of the existing high-frequency electric knives use bipolar output signals below 1MHz, generally 300~550KHz, which have many problems. First, the equipment control accuracy is low, there is no real-time tissue impedance detection, and there is no constant power control working mode; second, there is a lack of remote setting and monitoring functions; third, the output signal frequency is low, and the "thermal effect" generated is limited, forming carbides at the cutting interface, which is not conducive to rapid wound healing, easy to scar, and even produce adhesion; fourth, the negative plate must be placed on the patient's body, affecting the safety of the operation, and even causing burns to the patient. If the current passes for too long, it will also have side effects on the human body; fifth, the scope of use is limited, and when large-area diffuse bleeding occurs, other equipment such as argon gas supply devices are required to cooperate with coagulation. Increasing the frequency of the output signal is very likely to interfere with the normal operation of other peripheral electronic equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a digital minimally invasive high-frequency energy working system to solve the problems of low precision, side effects, safety, etc. of existing minimally invasive high-frequency electrosurgical knives.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A digital minimally invasive high-frequency energy working system comprises a power supply module, a high-frequency signal generator, a high-frequency power amplifier and a surgical electrode; the output circuit of the high-frequency signal generator after the high-frequency power amplifier outputs a signal to the surgical electrode; the power supply module provides power to the high-frequency signal generator, and the system also comprises a digital signal processing circuit and a control circuit connected to each other; a coupling sampling circuit is provided between the high-frequency power amplifier and the surgical electrode for real-time sampling of the load and transmitting the sampling information to the digital signal processing circuit for processing; a matching circuit is also provided between the output circuit of the high-frequency power amplifier and the surgical electrode; the control circuit selects different matching circuits to adjust the output signal output to the surgical electrode to a constant power or an output voltage amplitude according to the processing result of the digital signal processing circuit; the frequency of the output signal output to the surgical electrode by the system reaches above 2MHz.

[0007] As some embodiments, the system also includes a working mode setting and display module; the working mode setting and display module sets the output energy size and / or output mode of the surgical electrode through a control circuit, and is also used to display the set parameters and / or the working status of the system; the amplitude of the output signal frequency of the high-frequency power amplifier is adjustable; the output signal frequency is 2MHz~5MHz; the output power of the high-frequency power amplifier reaches 200W, and the output is isolated from the ground.

[0008] Furthermore, the control circuit is a control circuit that uses a single-chip microcomputer or DSP and can set the output energy size and the output waveform duty cycle; the coupled sampling circuit is used to accurately sample the load and output it to the digital signal processing circuit for fast analog-to-digital signal conversion to obtain the impedance value of the load; the selection of matching circuits with different parameters is achieved by using relays, and the control circuit controls the on and off of the relay coil.

[0009] Furthermore, the control circuit controls the relay to select a two-stage boost resonant circuit or a three-stage boost resonant circuit to adjust the output signal to a constant power or output voltage amplitude; the two-stage boost resonant circuit is composed of an inductor L2, a capacitor C3, and a cascade of an inductor L3 and a load capacitor; when the load impedance value obtained by the initial sampling of the load by the coupling sampling circuit is small, the control circuit controls relays LS1 and LS2 to select the two-stage boost resonant circuit to ensure constant power output; the three-stage boost resonant circuit is composed of an inductor L2, a capacitor C31, an inductor L31, a capacitor C32, and a cascade of an inductor L32 and a load capacitor; when the load impedance value obtained by the initial sampling of the load by the coupling sampling circuit is large, the control circuit controls relays LS1 and LS2 to select the three-stage boost resonant circuit to ensure constant power output.

[0010] Furthermore, the coupling sampling circuit can sample the voltage and current data of the load and transmit them to the digital signal processing circuit for rapid analog-to-digital signal conversion and processing to obtain the impedance value of the load; the coupling sampling circuit is a mutual inductor or a resistance sampling device.

[0011] Furthermore, the power supply module is an AC / DC power supply module with adjustable output voltage and power factor correction; the control circuit controls the output DC voltage of the AC / DC power supply module to adjust the output signal of the high-frequency power amplifier to a constant power or output voltage amplitude.

[0012] Furthermore, a high-frequency transformer is provided between the high-frequency power amplifier and the matching circuit, and the high-frequency transformer is used to electrically isolate the input mains power and the output of the high-frequency power amplifier to protect the patient and suppress high-frequency noise; a driving amplifier circuit is connected between the high-frequency signal generator and the high-frequency power amplifier to drive the high-frequency power amplifier.

[0013] Furthermore, the system also includes a surgical electrode identification module, which is connected to the surgical electrode and is used to automatically identify and determine the connected surgical electrode and automatically set the maximum output power of the surgical electrode; the system also includes a negative plate detection and control module, which is connected to the surgical electrode and is used to monitor the degree of adhesion between the negative plate and the tissue in real time, and to display or alarm; the negative plate detection and control module is set to display or alarm with the display module through the working mode or to alarm through the sound reminder module.

[0014] Furthermore, the system also includes a remote monitoring module; the remote monitoring module remotely controls and sets and monitors the working parameters and status of the system in real time through a communication network; the remote monitoring module is connected to the working mode setting and display module.

[0015] Furthermore, the system also includes a sound reminder module, which is used to emit sounds of different frequencies according to the working mode setting and the system status of the display module and / or various monitoring modules.

[0016] The beneficial effects of the present invention are:

[0017] The digital minimally invasive high-frequency energy working system of the present invention has an output signal frequency higher than 2MHz, preferably 2MHz to 5MHz, and can output constant power with adjustable size. The digital minimally invasive high-frequency energy working system of the present invention has a high degree of intelligent digitization, high control accuracy, simple operation, safety and reliability, less thermal damage to surrounding tissues of the human body, and can ideally realize constant-power electroresection and electrocoagulation minimally invasive surgery for different loads with large impedance range changes.

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural block diagram of a digital minimally invasive high-frequency energy working system according to an embodiment of the present invention.

[0020] Figure 2 It is a circuit diagram of a high-frequency power amplifier of a digital minimally invasive high-frequency energy working system according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of a matching circuit of a digital minimally invasive high-frequency energy working system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the various embodiments in the present application and the features in the embodiments may be combined with each other. The present invention is further described in detail below in conjunction with the drawings and specific embodiments.

[0023] The present invention relates to a digital minimally invasive high-frequency energy working system, wherein the output circuit of the high-frequency signal generator connected to the high-frequency power amplifier outputs a signal to the surgical electrode through a matching circuit; a coupling sampling circuit is provided between the high-frequency power amplifier and the surgical electrode for accurately and quickly sampling the load and transmitting it to the digital signal processing circuit for processing; the control circuit selects different matching circuits to adjust the output signal to constant power or output voltage amplitude according to the processing result of the digital signal processing circuit. The output signal frequency of the surgical electrode of the system of the present invention reaches more than 2MHz, the system has a high degree of intelligent digitization, high control accuracy, simple operation, safety and reliability, less thermal damage to the surrounding tissues of the human body, and can ideally realize digitally controlled constant power electrocuting and electrocoagulation of different loads with large impedance range changes.

[0024] As a specific embodiment, refer to Figure 1 A digital minimally invasive high-frequency energy working system includes a high-frequency signal generator 1, a driving amplifier circuit 2, a high-frequency power amplifier 3, a high-frequency transformer 4, a matching circuit 5, a surgical electrode 6, a control circuit 7, an AC / DC power supply module 8, a digital signal processing circuit 9, a coupling sampling circuit 10, a working mode setting and display module 11, a remote monitoring module 12, a negative plate detection module 13, a surgical electrode identification module 14 and a sound reminder module 15. The frequency of the output signal output by this system to the surgical electrode 6 is higher than 2MHz and can reach 5MHz, the output power reaches 200W, and the output is isolated from the ground.

[0025] The output end of the high-frequency signal generator 1 is electrically connected to the driving amplifier circuit 2 and the high-frequency power amplifier 3 to form an output circuit to output a high-frequency pulse signal, and the output circuit outputs a high-frequency signal to the surgical electrode 6 .

[0026] A matching circuit 5 is provided between the high-frequency power amplifier 3 and the surgical electrode 6. Furthermore, the high-frequency power amplifier 3 is connected to the matching circuit 5 via a high-frequency transformer 4.

[0027] A coupling sampling circuit 10 is provided between the high-frequency power amplifier 3 and the surgical electrode 6 .

[0028] The coupling sampling circuit 10 is connected to the digital signal processing circuit 9 and transmits sampling information of the load.

[0029] The surgical electrode 6 is connected to the negative plate detection module 13 and the surgical electrode identification module 14 .

[0030] The control circuit 7 is connected to the digital signal processing circuit 9, the drive amplifier circuit 2, the matching circuit 5, the AC / DC power supply module 8, the working mode setting and display module 11, the negative plate detection module 13, the surgical electrode identification module 14, and the sound reminder module 15 to control or receive the work and information of these electronic components.

[0031] The AC / DC power supply module 8 is connected to the high-frequency signal generator 1, the driving amplifier circuit 2, the high-frequency power amplifier 3, the control circuit 7, the digital signal processing circuit 9, the working mode setting and display module 11, the remote monitoring module 12, the sound reminder module 15 and other electronic components to provide power. It can be understood that these electronic components can also have independent power supplies.

[0032] The high-frequency signal generator 1 is powered by a power module 8 to generate a high-frequency signal. Preferably, the power module 8 is an AC / DC multi-channel output power module, which is connected to the mains to convert AC into multiple DC channels.

[0033] The driving amplifier circuit 2 is used to amplify the high-frequency signal output by the high-frequency signal generator 1 and drive the high-frequency power amplifier 3. The output signal frequency of the high-frequency power amplifier 3 is between 2MHz and 5MHz, and the amplitude of the output signal is adjustable. The control circuit 7 controls the output DC voltage of the AC / DC power supply module 8 in real time to adjust the amplitude of the output signal of the high-frequency power amplifier 3, thereby realizing high-precision constant power control or voltage amplitude adjustment. The output power of the high-frequency power amplifier 3 reaches 200W, and the output is isolated from the ground. As a specific example, the circuit diagram of the high-frequency power amplifier is shown in FIG. Figure 2 .

[0034] The high frequency transformer 4 is connected between the high frequency power amplifier 3 and the matching circuit 5, and is used to electrically isolate the input mains power from the output of the high frequency power amplifier 3 to protect the patient and suppress high frequency noise.

[0035] The matching circuit 5 is selected by the control circuit 7 according to the load impedance value obtained by the real-time high-speed sampling calculation of the coupling sampling circuit 10, and the output signal output by the high-frequency power amplifier 3 to the surgical electrode 6 is adjusted to a constant power or output voltage amplitude. The selection of the matching circuit 5 with different parameters is realized by a relay combination, and the control circuit 7 controls the on and off of the relay coil. Figure 3A specific example of the matching circuit 5 shown. The specific working principle of the matching circuit 5 is: if the load impedance value obtained after the initial sampling of the load by the coupling sampling circuit 10 is small, in order to ensure constant power output, the control circuit 7 controls the relays LS1 and LS2 to select a two-stage boost resonant circuit. The two-stage boost resonant circuit is composed of an inductor L2, a capacitor C3, and a cascade connection of the inductor L3 and the load capacitor. If the load impedance value obtained after the initial sampling is large, in order to ensure constant power output, the control circuit 7 controls the relays LS1 and LS2 to select a three-stage boost resonant circuit. The three-stage boost resonant circuit is composed of an inductor L2, a capacitor C31, an inductor L31, a capacitor C32, and a cascade connection of the inductor L32 and the load capacitor.

[0036] The control circuit 7 can be a single chip microcomputer or a DSP. The control circuit 7 receives the data signal of the digital signal processing circuit 9 and selects different matching circuits 5 to adjust the output signal of the high frequency power amplifier 3 to a constant power or output voltage amplitude.

[0037] The power supply module 8 is an AC / DC power supply module with adjustable output voltage and power factor correction. The AC / DC power supply module 8 is electrically connected to the high-frequency signal generator 1, connected to the AC mains and converted into a DC power supply to the high-frequency signal generator 1, generating a high-frequency signal. The AC / DC power supply module 8 is electrically connected to the high-frequency power amplifier 3 (specifically, to the driving amplifier circuit 2 and the high-frequency power amplifier 3), and the control circuit 7 controls the output DC voltage of the AC / DC power supply module 8 to adjust the amplitude of the high-frequency power amplifier 3. The output energy size and output mode can be set to the control circuit 7 through the working mode setting and display module 11.

[0038] The coupled sampling circuit 10 is used for accurately sampling the load, sampling the output voltage and current and outputting the sampling results to the digital signal processing circuit 9 for fast analog-to-digital signal conversion and processing.

[0039] The digital signal processing circuit 9 obtains the load impedance according to the real-time sampling result of the coupling sampling circuit 10, and outputs it to the control circuit 7. The control circuit 7 controls the matching circuit 5 with different parameters and adjusts the output voltage amplitude or constant power of the output signal.

[0040] The surgical electrode identification module 14 can automatically identify and determine the connected surgical electrode, and can automatically set the maximum output power through the working mode setting and display module 11.

[0041] The negative plate detection module 13 is used to monitor the degree of adhesion between the negative plate of the surgical electrode and the tissue in real time, and can directly display or alarm or display or alarm through the control circuit 7 and the working mode setting and display module 11, or through the sound reminder module 15.

[0042] The remote monitoring module 12 can remotely control and set and monitor the operating parameters and status of the system in real time using a computer via a communication network. The remote monitoring module can also remotely update software via a communication network.

[0043] The working mode setting and display module 11 is used to set the output energy size, output mode and display the setting parameters and the real-time working status of the system.

[0044] The sound reminder module 15 emits sounds of different frequencies according to the working mode setting and the platform status of the display module 11 and various monitoring modules.

[0045] The working process of the digital minimally invasive high-frequency energy working system of the above embodiment is as follows:

[0046] Connect the system to AC mains, select the working mode and output intensity of the surgical electrode 6 through the working mode setting and display module 11, and enter the ready working state. Step on the foot switch or manual switch, at this time, the coupling sampling circuit 10 initially samples and then processes and calculates the load impedance through the digital signal processing circuit 9. According to the load impedance, the control circuit 7 controls the relay to select different matching circuits 5; at the same time, the control circuit 7 and the coupling sampling circuit 10 quickly sample in real time and then process and calculate the load impedance through the digital signal processing circuit 9. According to the load impedance, the output DC voltage of the AC / DC power supply module 8 is controlled in real time to adjust the output signal amplitude of the high-frequency power amplifier 3, so as to achieve high-precision constant power control or output amplitude adjustment. The output of this system forms a strong electromagnetic field at the end of the surgical electrode 6, which works together with the patient's body tissue to make the polar molecules in the cells oscillate rapidly in a local range, forming low-temperature heat energy, causing the water molecules to ionize, and realizing the separation and coagulation of human tissue, thereby achieving the purpose of cutting and hemostasis. Minimally invasive electrosurgery is achieved.

[0047] The digital minimally invasive high-frequency energy working system of the present invention has a high degree of intelligent digitization, high control accuracy, simple operation, safety and reliability, less thermal damage to the surrounding tissues of the human body, and can ideally realize minimally invasive surgery of constant power electroresection and electrocoagulation for different loads with large impedance range changes. The present invention can be widely used not only in direct vision surgery of general surgery, thoracic surgery, neurosurgery, ENT, and maxillofacial surgery, but also in various endoscopic surgeries including laparoscopes, prostate resections, gastroscopy, cystoscopy, and hysteroscopy, especially those abdominal duct ligation and prostate urethral tumor resection surgeries that are difficult to enter and implement with mechanical scalpels, as well as operations in diffuse bleeding sites such as the liver, spleen, thyroid, breast, and lungs.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, all of which should fall within the scope of the present application. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A digital minimally invasive high-frequency energy working system, comprising a power supply module, a high-frequency signal generator, a high-frequency power amplifier and a surgical electrode; the high-frequency signal generator outputs a signal to the surgical electrode through an output circuit after the high-frequency power amplifier; the power supply module provides power to the high-frequency signal generator, characterized in that: The system also includes a digital signal processing circuit and a control circuit connected to each other; A coupling sampling circuit is provided between the high-frequency power amplifier and the surgical electrode for sampling the load and transmitting the sampling information to the digital signal processing circuit for processing; A matching circuit is also provided between the output circuit of the high-frequency power amplifier and the surgical electrode; The control circuit selects different matching circuits to adjust the output signal output to the surgical electrode to a constant power or output voltage amplitude according to the processing result of the digital signal processing circuit; The frequency of the output signal output by the system to the surgical electrode reaches above 2 MHz; The selection of matching circuits with different parameters is realized by relay switching, and the control circuit controls the on and off of the relay coil; The control circuit controls the relay to select a two-stage boost resonant circuit or a three-stage boost resonant circuit to adjust the output signal to a constant power or output voltage amplitude; The secondary boost resonant circuit is composed of an inductor L2, a capacitor C3, and a cascade connection of the inductor L3 and the load capacitor; when the load impedance value obtained by the initial sampling of the load by the coupling sampling circuit is small, the control circuit controls the relays LS1 and LS2 to select the secondary boost resonant circuit to ensure constant power output; The three-stage boost resonant circuit is composed of an inductor L2, a capacitor C31, and a cascade of an inductor L31, a capacitor C32, and an inductor L32 and a load capacitor; when the load impedance value obtained by the initial sampling of the load by the coupling sampling circuit is large, the control circuit controls relays LS1 and LS2 to select the three-stage boost resonant circuit to ensure constant power output.

2. The digital minimally invasive high-frequency energy working system according to claim 1, characterized in that: The system further comprises a working mode setting and display module; the working mode setting and display module sets the output energy size and / or output mode of the surgical electrode through the control circuit, and is also used to display the setting parameters and / or the working state of the system; The amplitude of the output signal frequency of the high-frequency power amplifier is adjustable; the output signal frequency is 2MHz~5MHz; the output power of the high-frequency power amplifier reaches 200W, and the output is isolated from the ground.

3. The digital minimally invasive high-frequency energy working system according to claim 1, characterized in that: The control circuit is a control circuit that uses a single-chip microcomputer or a DSP and can set the output energy size and the output waveform duty cycle; The coupling sampling circuit is used to accurately sample the load and output it to the digital signal processing circuit for rapid analog-to-digital signal conversion to obtain the impedance value of the load.

4. The digital minimally invasive high-frequency energy working system according to claim 1, characterized in that: The coupling sampling circuit can sample the voltage and current data of the load and transmit the data to the digital signal processing circuit; the coupling sampling circuit is a mutual inductor or a resistance sampling device.

5. The digital minimally invasive high-frequency energy working system according to claim 1, characterized in that: The power supply module is an AC / DC power supply module with adjustable output voltage and power factor correction; the control circuit controls the output DC voltage of the AC / DC power supply module to adjust the output signal of the high-frequency power amplifier to a constant power or output voltage amplitude.

6. The digital minimally invasive high-frequency energy working system according to claim 1, characterized in that: A high-frequency transformer is also provided between the high-frequency power amplifier and the matching circuit, and the high-frequency transformer is used to electrically isolate the input mains power from the output of the high-frequency power amplifier to protect the patient and suppress high-frequency clutter; A driving amplifier circuit is connected between the high-frequency signal generator and the high-frequency power amplifier, and is used to drive the high-frequency power amplifier.

7. The digital minimally invasive high-frequency energy working system according to claim 2, characterized in that: The system further comprises a surgical electrode identification module, which is connected to the surgical electrode and is used to automatically identify and determine the connected surgical electrode and automatically set the maximum output power of the surgical electrode; The system further comprises a negative plate detection and control module, which is connected to the surgical electrode and is used to monitor the degree of adhesion between the negative plate and the tissue in real time and to display or alarm; The negative plate detection and control module displays or alarms through the working mode setting and display module, or alarms through the sound reminder module.

8. The digital minimally invasive high-frequency energy working system according to claim 2, characterized in that: The system further comprises a remote monitoring module; the remote monitoring module remotely controls and sets and monitors the working parameters and status of the system in real time through a communication network; the remote monitoring module is connected to the working mode setting and display module.

9. The digital minimally invasive high-frequency energy working system according to claim 2, characterized in that: The system further comprises a sound reminder module, which is used to emit sounds of different frequencies according to the working mode setting and the system status of the display module and / or various monitoring modules.

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