High frequency surgical system and impedance detection device

Abstract

The application provides a high-frequency surgical system. The system comprises: a power module, which forms a surgical circuit with a surgical electrode, a medical object and a double-plate neutral electrode, and is used for generating high-frequency current flowing in the surgical circuit to deliver energy to the surgical electrode; a parallel resonant circuit, which is coupled to one electrode of the double-plate neutral electrode at two ends; an excitation signal source, which is used for providing an excitation signal to the parallel resonant circuit to generate a measurement voltage at two ends of the parallel resonant circuit for determining contact impedance between the double-plate neutral electrode and the medical object, wherein the frequency of the excitation signal matches the resonant frequency of the parallel resonant circuit; and a control module, which is used for adjusting the energy delivered by the power module to the surgical electrode according to the measurement voltage, wherein the double-plate neutral electrode, the parallel resonant circuit and the excitation signal source are in the same electrically isolated area. According to the application, the impedance detection circuit is modularized, which is beneficial to design simplification and subsequent maintenance replacement.

Description

Technical Field

[0001] This invention relates to the technical field of medical devices, and more specifically, to a high-frequency surgical system and an impedance detection device. Background Technology

[0002] A high-frequency electrosurgical unit is an electrosurgical instrument that replaces a mechanical scalpel for tissue cutting. It heats tissues by generating a high-frequency, high-voltage current at the tip of an effective surgical electrode, thereby separating and coagulating the tissues to achieve the purpose of cutting and hemostasis.

[0003] A high-frequency electrosurgical unit consists of a high-frequency surgical system (main unit) and external surgical electrodes and a neutral electrode. The neutral electrode is part of the application and needs to be isolated from the control circuitry of the high-frequency surgical system. Furthermore, during surgery, because the patient is under anesthesia and cannot perceive skin heat or burns, continuous monitoring of the contact between the neutral electrode and the patient is necessary to prevent safety hazards.

[0004] Currently, impedance detection circuits in high-frequency surgical systems are typically isolated from the neutral electrode, placing them in the same electrically isolated region as the control circuit. However, this approach results in a complex circuit structure for the high-frequency surgical system, making it difficult to clearly define the function of the impedance detection circuit, hindering modularization, and compromising design and subsequent maintenance. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] In view of the above-mentioned technical problems, the first aspect of the present invention provides a high-frequency surgical system, comprising:

[0007] A power module, which forms a surgical circuit with surgical electrodes, a medical object, and a dual-plate neutral electrode, is used to generate a high-frequency current flowing in the surgical circuit to transfer energy to the surgical electrodes.

[0008] A parallel resonant circuit, the two ends of which are respectively coupled to one electrode of the dual-plate neutral electrode;

[0009] An excitation signal source, coupled to the parallel resonant circuit, is used to provide an excitation signal to the parallel resonant circuit so that a measurement voltage is generated across the parallel resonant circuit to determine the contact impedance between the dual-plate neutral electrode and the medical object, wherein the frequency of the excitation signal matches the resonant frequency of the parallel resonant circuit.

[0010] A control module, coupled to the parallel resonant circuit, is used to adjust the energy delivered by the power module to the surgical electrodes based on the measured voltage.

[0011] The dual-plate neutral electrode, the parallel resonant circuit, and the excitation signal source are located in the same electrically isolated region.

[0012] According to some embodiments of the present invention, the parallel resonant circuit includes:

[0013] An inductor, the two ends of which are respectively connected to one electrode of the dual-plate neutral electrode; and

[0014] A first capacitor and a second capacitor are connected together. The first terminal of the first capacitor is connected to one end of the inductor, and the second terminal of the second capacitor is connected to the other end of the inductor. The first and second terminals of the first capacitor and the first terminal of the second capacitor are connected to the power module to shunt the high-frequency current.

[0015] According to some embodiments of the present invention, the high-frequency surgical system further includes:

[0016] A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage;

[0017] A measurement module, coupled to the signal processing module, is used to determine the measurement result of the contact impedance based on the processed measurement voltage; and

[0018] An isolation transmission module, coupled between the measurement module and the control module, is used to electrically isolate the measurement module from the control module and transmit the measurement results to the control module.

[0019] According to some embodiments of the present invention, determining the measurement result of the contact impedance based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, determining whether the impedance value exceeds a preset threshold, and using the determination result as the measurement result.

[0020] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: if the determination result indicates that the impedance value exceeds the preset threshold, then cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0021] According to some embodiments of the present invention, the measurement module is also configured to issue a warning signal when the impedance value exceeds the preset threshold.

[0022] According to some embodiments of the present invention, determining the measurement result of the contact impedance based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, and using the impedance value as the measurement result.

[0023] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining whether the impedance value exceeds a preset threshold; if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0024] According to some embodiments of the present invention, the signal processing module includes:

[0025] An amplifier circuit is used to amplify the measured voltage; and

[0026] An analog-to-digital converter circuit is used to convert the amplified measured voltage into an analog-to-digital value to obtain the processed measured voltage.

[0027] According to some embodiments of the present invention, the parallel resonant circuit, the excitation signal source, the signal processing module, the measurement module, and the isolation transmission module are integrated on the same circuit board.

[0028] According to some embodiments of the present invention, the high-frequency surgical system further includes:

[0029] A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage;

[0030] An isolation transmission module, coupled between the signal processing module and the control module, is used to electrically isolate the signal processing module from the control module and transmit the processed measured voltage to the control module.

[0031] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining the impedance value of the contact impedance based on the processed measured voltage, determining whether the impedance value exceeds a preset threshold, and if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0032] A second aspect of the invention provides an impedance detection device for a high-frequency surgical system, the high-frequency surgical system including a power module and a control module, the power module forming a surgical circuit with surgical electrodes, a medical object, and a dual-plate neutral electrode, and used to generate a high-frequency current flowing in the surgical circuit to transfer energy to the surgical electrodes, characterized in that the impedance detection device includes:

[0033] A parallel resonant circuit, the two ends of which are respectively coupled to one electrode of the dual-plate neutral electrode;

[0034] An excitation signal source, coupled to the parallel resonant circuit, provides an excitation signal to the parallel resonant circuit, causing a measurement voltage to be generated across the parallel resonant circuit to determine the contact impedance between the dual-plate neutral electrode and the medical object. This voltage, in turn, causes the control module to adjust the energy delivered by the power module to the surgical electrode based on the measurement voltage.

[0035] The frequency of the excitation signal is matched with the resonant frequency of the parallel resonant circuit, and the dual-plate neutral electrode, the parallel resonant circuit, and the excitation signal source are in the same electrical isolation region.

[0036] According to some embodiments of the present invention, the parallel resonant circuit includes:

[0037] An inductor, the two ends of which are respectively connected to one electrode of the dual-plate neutral electrode; and

[0038] A first capacitor and a second capacitor are connected together. The first terminal of the first capacitor is connected to one end of the inductor, and the second terminal of the second capacitor is connected to the other end of the inductor. The second terminal of the first capacitor and the first terminal of the second capacitor are connected to the power module to shunt the high-frequency current.

[0039] According to some embodiments of the present invention, the impedance detection device further includes:

[0040] A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage;

[0041] A measurement module, coupled to the signal processing module, is used to determine the measurement result of the contact impedance based on the processed measurement voltage; and

[0042] An isolation transmission module, coupled between the measurement module and the control module, is used to electrically isolate the measurement module from the control module and transmit the measurement results to the control module.

[0043] According to some embodiments of the present invention, determining the measurement result of the contact impedance based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, determining whether the determined impedance value exceeds a preset threshold, and using the impedance value and the determination result as the measurement result.

[0044] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: if the determination result indicates that the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0045] According to some embodiments of the present invention, the measurement module is also configured to issue a warning signal when the impedance value exceeds the preset threshold.

[0046] According to some embodiments of the present invention, determining the measurement result of the contact impedance based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, and using the impedance value as the measurement result.

[0047] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining whether the impedance value exceeds a preset threshold; if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0048] According to some embodiments of the present invention, the signal processing module includes:

[0049] An amplifier circuit is used to amplify the measured voltage; and

[0050] An analog-to-digital converter circuit is used to convert the amplified measured voltage into an analog-to-digital value to obtain the processed measured voltage.

[0051] According to some embodiments of the present invention, the parallel resonant circuit, the excitation signal source, the signal processing module, the measurement module, and the isolation transmission module are integrated on the same circuit board.

[0052] According to some embodiments of the present invention, the impedance detection device further includes:

[0053] A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage;

[0054] An isolation transmission module, coupled between the signal processing module and the control module, is used to electrically isolate the signal processing module from the control module and transmit the processed measured voltage to the control module.

[0055] Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining the impedance value of the contact impedance based on the processed measured voltage, determining whether the impedance value exceeds a preset threshold, and if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

[0056] According to the present invention, the neutral electrode, the parallel resonant circuit and the excitation signal source are in the same electrical isolation area, which allows for a clear and distinct functional division of the part used for impedance detection. The circuit structure is relatively simple, easy to modularize, and beneficial for design simplification and subsequent maintenance and replacement. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] In the attached diagram:

[0059] Figure 1 A structural principle block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown;

[0060] Figure 2 A schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown;

[0061] Figure 3 Another schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown;

[0062] Figure 4 Another schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of the present invention, and not all of the embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of the present invention.

[0064] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0065] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. The lines connecting the units or modules in the accompanying drawings are merely for illustrative purposes, indicating that at least the units or modules at both ends of the line are communicating with each other, and are not intended to prevent unconnected units from communicating.

[0066] Before introducing the embodiments of the present invention, some of the terms involved in the present invention will be explained in order to better understand the present invention.

[0067] The terms “connection,” “coupling,” or “linkage” and similar terms used in this invention are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Words such as “a,” “a group,” or “one” do not indicate a quantity limitation, but rather indicate the presence of at least one.

[0068] The terms "comprising," "including," and similar terms used in this invention should be understood as open-ended terms, meaning "including / including but not limited to," indicating that other contents may also be included. The term "based on" means "at least partially based on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment," and so on. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] To fully understand this invention, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this invention. Optional embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0070] This invention provides a high-frequency surgical system. In this high-frequency surgical system, the parallel resonant circuit and the excitation signal source are in the same electrically isolated area as the dual-plate neutral electrode. This allows for a clear and distinct functional division of the part used for impedance detection. The circuit structure is relatively simple, easy to modularize, and facilitates design simplification and subsequent maintenance and replacement.

[0071] Below, first refer to Figure 1 The principle of the high-frequency surgical system proposed in this invention is described. Figure 1A structural block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown. The high-frequency surgical system 100 includes an excitation signal source 10, a parallel resonant circuit 11, a control module 12, and a power module 13. It can be understood that... Figure 1 Only a portion of the circuit modules of the high-frequency surgical system 100 are shown in the image; it may also include many other circuit modules.

[0072] When the high-frequency surgical system 100 is in use, the power module 13 is connected to the power supply ( Figure 1 (Not shown in the image), its output is connected on one side to the electrode interface 101a for the surgical electrode 14, and on the other side to the electrode interfaces 101b and 101c for the two electrodes 15a and 15b of the dual-plate neutral electrode. The excitation signal source 10 is coupled to the parallel resonant circuit 11, and the control module 12 is coupled to the parallel resonant circuit 11 and the power module 13. The two ends of the parallel resonant circuit 11 are connected to the electrode interfaces 101b and 101c, respectively. Figure 1 As shown, surgical electrode 14 is connected to electrode interface 101a, and two electrodes 15a and 15b are connected to electrode interfaces 101b and 101c respectively, and are applied to the skin of the medical subject 102. Neutral electrodes 15a and 15b each have a contact surface and make electrical contact with the skin of the medical subject 102.

[0073] Power module 13 forms a surgical circuit with surgical electrode 14, medical subject 102, and two electrodes 15a and 15b. Power module 13 converts the alternating current fed by the power supply into direct current, and then converts the direct current into a high-frequency current for high-frequency surgery. The high-frequency current flows in the surgical circuit, transferring energy to surgical electrode 14, which the operator uses to perform cutting and / or coagulation operations on medical subject 102. A contact impedance is formed between the contact surfaces of the two electrodes 15a and 15b and medical subject 102. Excitation signal source 10 provides an excitation signal to parallel resonant circuit 11, causing a measured voltage of the contact impedance to be generated across parallel resonant circuit 11. The frequency of the excitation signal is matched to the resonant frequency of parallel resonant circuit 11. For example, the frequency of the excitation signal is substantially equal to the resonant frequency of parallel resonant circuit 11. Alternatively, the frequency of the excitation signal deviates from the resonant frequency of parallel resonant circuit 11 within a certain range. Control module 12 adjusts the energy delivered by power module 13 to surgical electrode 14 according to the measured voltage. Adjusting the energy can be, for example, cutting off, increasing, or decreasing the energy.

[0074] In this invention, the two electrodes 15a and 15b of the dual-plate neutral electrode, the excitation signal source 10, and the parallel resonant circuit are located in the same electrically isolated region. This allows for a clear and distinct functional division of the impedance detection circuit of the dual-plate neutral electrode, facilitating modular design and simplifying the design process, as well as subsequent maintenance and replacement.

[0075] Next reference Figure 2 , Figure 2 A schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown. Figure 2 The surgical electrode and neutral electrode are not shown, but R is used. L This represents the equivalent contact resistance between the neutral electrode and the medical object. Figure 1 compared to, Figure 2 The high-frequency surgical system 200 also includes a signal processing module 20 coupled to a parallel resonant circuit 11, a measurement module 21 coupled to the signal processing module 20, and an isolation transmission module 22 coupled between the measurement module 21 and the control module 12. The measurement module 21 may be, for example, a microprocessor (MCU).

[0076] Specifically, such as Figure 2 As shown, the excitation signal source 10 includes an alternating current source and a current-limiting resistor R1. The parallel resonant circuit 11 includes an inductor L1 and first capacitors C1 and C2 connected in parallel with the inductor L1. One end of the inductor L1 is connected to the electrode interface 101b for one electrode of the dual-plate neutral electrode, the current-limiting resistor R1, and the first terminal of the first capacitor C1. The other end of the inductor L1 is connected to the electrode interface 101c for the other electrode and the second terminal of the second capacitor C2 and grounded. The second terminal of the first capacitor C1 is connected to the first terminal of the second capacitor C2 and then connected to the power module 13. That is, the first capacitor C1 and the second capacitor C2 are connected in series in the surgical circuit to shunt the high-frequency current output from the power module 13. In the surgical circuit, the high-frequency current output from the power module 13 flows through the surgical electrode, the medical object, and the neutral electrode. Figure 2 After passing through the first capacitor C1 and the second capacitor C2 (not shown in the image), the current flows back to the power module 13. The capacitance values ​​of the first capacitor C1 and the second capacitor C2 are substantially equal, ensuring that the high-frequency current flowing through the two electrodes of the biplane neutral electrode is approximately equal. The frequency of the excitation signal output by the excitation signal source 10 is substantially equal to the resonant frequency of the parallel resonant circuit 11, which can be, for example, between 60kHz and 100kHz. This resonant frequency can be determined by the inductance value of inductor L1 and the capacitance values ​​of the first capacitor C1 and the second capacitor C2.

[0077] During the use of the high-frequency surgical system 200, the excitation signal source 10 applies an excitation signal to the parallel resonant circuit 11. Ideally, the impedance of the parallel resonant circuit 11 is infinite at the resonant frequency. This is because the parallel resonant circuit 11 and the contact impedance R... L The reciprocal of the total impedance of the parallel circuit is given by the reciprocal of the impedance of the parallel resonant circuit 11 and the contact impedance R. L The sum of the reciprocals of the impedances determines the total impedance of the parallel circuit, therefore the total impedance is approximately equal to the contact impedance R. LThe impedance value. The measured voltage across the parallel resonant circuit 11 is approximately equal to the contact impedance R. L The voltage drop across the two ends can therefore be used to determine the contact resistance R. L The impedance value.

[0078] Signal processing module 20 receives the measured voltage from parallel resonant circuit 11, processes it, and then inputs it to measurement module 21. Measurement module 21 determines the contact impedance R based on the processed measured voltage. L The measurement results are transmitted to the control module 12. The isolation transmission module 22 electrically isolates the measurement module 21 from the control module 12. That is, the neutral electrode, excitation signal source 10, parallel resonant circuit 11, signal processing module 20, and measurement module 21 are in the same electrically isolated region. The isolation transmission module 22 also transmits the measurement results to the control module 12. The isolation transmission module 22 may include analog isolation elements such as transformers, digital isolation elements such as optocouplers or magnetic couplers, or combinations thereof. The control module 12 adjusts the energy delivered to the surgical electrode by the power module 13 based on the measurement results.

[0079] In some embodiments, the measurement module 21 determines the contact impedance R based on the processed measurement voltage. L The impedance value. Specifically, the measurement module 21 divides the voltage value of the measured voltage by the current value of the excitation signal to obtain the contact impedance R. L The impedance value. Then, the measurement module 21 will measure the contact impedance R. L The impedance value is compared with a preset threshold to determine the contact impedance R. L The system checks whether the impedance value exceeds a preset threshold and transmits the result as a measurement result to the control module 12 via the isolation transmission module 22. If the result indicates that the impedance value exceeds the preset threshold, the control module 12 cuts off or reduces the energy transmitted to the surgical electrode by the power module 13. Therefore, there is no high-frequency current flowing in the surgical circuit, or only a very small high-frequency current flowing, preventing skin burns that may occur at the contact surface of the neutral electrode.

[0080] In some embodiments, the measurement module 21 determines the contact impedance R based on the processed measurement voltage. L The impedance value. Specifically, the measurement module 21 divides the voltage value of the measured voltage by the current value of the excitation signal to obtain the contact impedance R. L The impedance value is then measured. This impedance value is then transmitted as a measurement result to the control module 12 via the isolation transmission module 22. The control module 12 then transmits the contact impedance R... L The impedance value is compared with a preset threshold to determine the contact impedance R. LThe control module 12 checks whether the impedance value exceeds a preset threshold. If the impedance value exceeds the preset threshold, the control module 12 cuts off or reduces the energy delivered to the surgical electrode by the power module 13. Therefore, there is no high-frequency current flowing in the surgical circuit, or only a very small high-frequency current flowing, preventing skin burns that may occur at the contact surface of the neutral electrode.

[0081] In some embodiments, the signal processing module 20 includes an amplifier circuit and an analog-to-digital converter circuit. The amplifier circuit amplifies the measured voltage, and the analog-to-digital converter circuit converts the amplified measured voltage into an analog-to-digital signal to obtain a processed measured voltage. In other embodiments, the high-frequency surgical system may also employ purely analog circuitry, and the signal processing module 20 may include only the amplifier circuit without the analog-to-digital converter circuit.

[0082] In some embodiments, the measurement module 21 can measure the contact resistance R L A warning signal is issued when the impedance value exceeds a preset threshold. The warning signal can be a light signal or an audio signal, making it easy for the operator to notice it visually or audibly. For example, the measurement module 21 can drive an indicator light to flash and / or emit a sound through a speaker. In other embodiments, the warning signal can also be issued by the control module 12.

[0083] In some embodiments, the excitation signal source 10, parallel resonant circuit 11, signal processing module 20, measurement module 21, and isolation transmission module 22 can be integrated on the same circuit board, and a communication interface for communication between the isolation transmission module 22 and the control module 12 can be provided. During installation and subsequent maintenance, the communication interface of the circuit board can be directly connected or disconnected from the communication interface of the control module 12 to install or replace the circuit board.

[0084] In some embodiments, the measurement module 21 is used not only for detecting contact resistance R L The impedance value can also be used to achieve more functions. For example, the measurement module 21 can detect other circuit parameters related to the neutral electrode (such as the current value of the high-frequency current flowing through each electrode of the dual-plate neutral electrode) and compare the detection results with the contact impedance R. L The measurement results are transmitted together to the control module 12.

[0085] Next reference Figure 3 , Figure 3 Another schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown. Figure 3 In, with Figure 1 and Figure 2 The same reference numerals in the accompanying drawings denote the same or similar elements or modules that perform the same or similar functions, and will not be described again here. Only the following descriptions are provided. Figure 3 High-frequency surgical system 300 and Figure 2The differences between the high-frequency surgical system 200 and others.

[0086] Compared to the high-frequency surgical system 200, in the high-frequency surgical system 300, the isolation transmission module 22 is coupled between the signal processing module 20 and the measurement module 21. That is, after the signal processing module 20 processes the measured voltage, the processed measured voltage is sent to the measurement module 21 via the isolation transmission module 22 to measure the contact resistance R. L Calculation of impedance value.

[0087] In other embodiments, the isolation transmission module 22 may also be coupled between the parallel resonant circuit 11 and the signal processing module 20, or between two circuits (such as an amplifier circuit and an analog-to-digital converter circuit) in the signal processing module 20, as long as the neutral electrode, the excitation signal source 10 and the parallel resonant circuit 11 are in the same electrical isolation region.

[0088] Next reference Figure 4 , Figure 4 Another schematic block diagram of a high-frequency surgical system according to an embodiment of the present invention is shown. Figure 4 In, with Figure 1 and Figure 2 The same reference numerals in the accompanying drawings denote the same or similar elements or modules that perform the same or similar functions, and will not be described again here. Only the following descriptions are provided. Figure 4 High-frequency surgical system 400 and Figure 2 The differences between the high-frequency surgical system 200 and others.

[0089] Compared to the high-frequency surgical system 200, Figure 4 The high-frequency surgical system 400 does not include a measurement module. An isolation transmission module 22 is coupled between the signal processing module 20 and the control module 12. In other embodiments, the isolation transmission module 22 may also be coupled between the parallel resonant circuit 11 and the signal processing module 20, or between two circuits (such as an amplifier circuit and an analog-to-digital converter circuit) within the signal processing module 20, as long as the neutral electrode, the excitation signal source 10, and the parallel resonant circuit 11 are in the same electrically isolated region.

[0090] During the use of the high-frequency surgical system 400, the signal processing module 20 receives the measured voltage from the parallel resonant circuit 11, processes it, and obtains the processed measured voltage. The isolation transmission module 22 electrically isolates the signal processing module 20 from the control module 12. That is, the neutral electrode, the excitation signal source 10, the parallel resonant circuit 11, and the signal processing module 20 are in the same electrically isolated region. The isolation transmission module 22 also transmits the processed measured voltage to the control module 12. The control module 12 determines the contact impedance value based on the processed measured voltage. Specifically, the control module 12 divides the measured voltage value by the current value of the excitation signal to obtain the contact impedance R. L The impedance value. Then, the control module 12 will set the contact impedance R. L The impedance value is compared with a preset threshold to determine the contact impedance R. L The control module 12 checks whether the impedance value exceeds a preset threshold. If the impedance value exceeds the preset threshold, the control module 12 cuts off or reduces the energy delivered to the surgical electrode by the power module 13. Therefore, there is no high-frequency current flowing in the surgical circuit, or only a very small high-frequency current flowing, preventing skin burns that may occur at the contact surface of the neutral electrode.

[0091] In some embodiments, the control module 12 can adjust the contact resistance R. L A warning signal is issued when the impedance value exceeds a preset threshold. The warning signal can be a light signal or an audio signal, making it easy for the operator to notice it visually or audibly. For example, the control module 12 can drive an indicator light to flash and / or emit a sound through a speaker.

[0092] In some embodiments, the excitation signal source 10, parallel resonant circuit 11, signal processing module 20, and isolation transmission module 22 can be integrated on the same circuit board, and a communication interface for communication between the isolation transmission module 22 and the control module 12 can be provided. During installation and subsequent maintenance, the communication interface of the circuit board can be directly connected or disconnected from the communication interface of the control module 12 to install or replace the circuit board.

[0093] This invention also proposes an impedance detection device for a high-frequency surgical system. In this impedance detection device, the parallel resonant circuit and the excitation signal source are in the same electrically isolated area as the neutral electrode. The circuit structure is relatively simple, and the functional division of the part used for impedance detection can be clearly defined, which facilitates modularization and is beneficial for design simplification and subsequent maintenance and replacement.

[0094] refer to Figure 1 , Figure 1The impedance detection device 103 includes an excitation signal source 10 and a parallel circuit 11. The excitation signal source 10 is coupled to the parallel resonant circuit 11, the two ends of which are connected to electrode interfaces 101b and 101c for the two electrodes 15a and 15b of the dual-plate neutral electrode, respectively. The excitation signal source 10 provides an excitation signal to the parallel resonant circuit 11, causing a measurement voltage of the contact impedance to be generated across the parallel resonant circuit 11. The frequency of the excitation signal is matched with the resonant frequency of the parallel resonant circuit 11; for example, the frequency of the excitation signal is substantially equal to the resonant frequency of the parallel resonant circuit 11. The control module 12 adjusts the energy delivered to the surgical electrode 14 by the power module 13 according to the measured voltage. Adjusting the energy may, for example, involve cutting off, increasing, or decreasing the energy.

[0095] In this invention, the neutral electrode, the excitation signal source 10, and the parallel resonant circuit are located in the same electrically isolated region. This allows for a clear and distinct functional division of the impedance detection components, facilitating modular design, simplifying the design process, and simplifying subsequent maintenance and replacement.

[0096] exist Figure 2 and Figure 3 In, with Figure 1 Compared to the impedance detection device 103, in addition to the excitation signal source 10 and the parallel resonant circuit 11, impedance detection devices 203 and 303 also include a signal processing module 20, a measurement module 21, and an isolation transmission module 22. Specific functional descriptions of each module can be found above and will not be repeated here.

[0097] exist Figure 4 In, with Figure 1 Compared to the impedance detection device 103, in addition to the excitation signal source 10 and the parallel resonant circuit 11, the impedance detection device 403 also includes a signal processing module 20 and an isolation transmission module 22. For a detailed description of the functions of each module, please refer to the foregoing content; further details will not be repeated here.

[0098] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units or modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units, modules, or components may be combined or integrated into another system or apparatus, or some features may be ignored or not executed.

[0099] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some embodiments, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0100] Similarly, it should be understood that, in order to streamline the invention and aid in understanding one or more of the various aspects of the invention, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the invention. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with fewer features than all of those in a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0101] Those skilled in the art will understand that, apart from the mutual exclusion of features, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes, units, or modules of any system, apparatus, and method so disclosed. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature serving the same, equivalent, or similar purpose.

[0102] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0103] It should also be noted that the above embodiments are illustrative of the invention and not restrictive, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the terms first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0104] The above description is merely a specific embodiment of the present invention or an explanation of that embodiment. The scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-frequency surgical system, characterized by comprising: include: A power module, which forms a surgical circuit with surgical electrodes, a medical object, and a dual-plate neutral electrode, is used to generate a high-frequency current flowing in the surgical circuit to transfer energy to the surgical electrodes. A parallel resonant circuit, the two ends of which are respectively coupled to one electrode of the dual-plate neutral electrode; An excitation signal source is coupled to the parallel resonant circuit and is used to provide an excitation signal to the parallel resonant circuit so that a measurement voltage is generated across the parallel resonant circuit to determine the contact impedance between the dual-plate neutral electrode and the medical object, wherein the frequency of the excitation signal matches the resonant frequency of the parallel resonant circuit. A control module, coupled to the parallel resonant circuit, is used to adjust the energy delivered by the power module to the surgical electrode according to the measured voltage. The dual-plate neutral electrode, the parallel resonant circuit, and the excitation signal source are located in the same electrically isolated region.

2. The high-frequency surgical system of claim 1, wherein The parallel resonant circuit includes: An inductor, the two ends of which are respectively connected to one electrode of the dual-plate neutral electrode; and A first capacitor and a second capacitor are connected together. The first terminal of the first capacitor is connected to one end of the inductor, and the second terminal of the second capacitor is connected to the other end of the inductor. The second terminal of the first capacitor and the first terminal of the second capacitor are connected together and then connected to the power module to shunt the high-frequency current.

3. The high-frequency surgical system of claim 1, wherein Also includes: A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage; A measurement module, coupled to the signal processing module, is used to determine the measurement result of the contact impedance based on the processed measurement voltage; as well as An isolation transmission module, coupled between the measurement module and the control module, is used to electrically isolate the measurement module from the control module and transmit the measurement results to the control module.

4. The high-frequency surgical system according to claim 3, characterized in that, Determining the contact impedance measurement result based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, determining whether the impedance value exceeds a preset threshold, and using the determination result as the measurement result. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: if the determination result indicates that the impedance value exceeds the preset threshold, then cutting off or reducing the energy delivered by the power module to the surgical electrode.

5. The high-frequency surgical system of claim 4, wherein The measurement module is also used to issue a warning signal when the impedance value exceeds the preset threshold.

6. The high-frequency surgical system of claim 3, wherein the RF signal is a continuous wave signal. Determining the contact impedance measurement result based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, and using the impedance value as the measurement result. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining whether the impedance value exceeds a preset threshold; if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

7. The high-frequency surgical system of claim 3, wherein the RF signal generator is configured to generate the RF signal with a frequency of about 1 MHz to about 5 MHz. The signal processing module includes: An amplifier circuit is used to amplify the measured voltage; and An analog-to-digital converter circuit is used to convert the amplified measured voltage into an analog-to-digital value to obtain the processed measured voltage.

8. The high-frequency surgical system of claim 3, wherein, The parallel resonant circuit, the excitation signal source, the signal processing module, the measurement module, and the isolation transmission module are integrated on the same circuit board.

9. The high-frequency surgical system of claim 1, wherein, Also includes: A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage; An isolation transmission module, coupled between the signal processing module and the control module, is used to electrically isolate the signal processing module from the control module and transmit the processed measured voltage to the control module. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining the impedance value of the contact impedance based on the processed measured voltage, determining whether the impedance value exceeds a preset threshold, and if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

10. An impedance detection device for a high-frequency surgical system, the high-frequency surgical system comprising a power module and a control module, the power module forming a surgical circuit with surgical electrodes, a medical object, and a dual-plate neutral electrode, and used to generate a high-frequency current flowing in the surgical circuit to transfer energy to the surgical electrodes, characterized in that, The impedance detection device includes: A parallel resonant circuit, the two ends of which are respectively coupled to one electrode of the dual-plate neutral electrode; An excitation signal source, coupled to the parallel resonant circuit, provides an excitation signal to the parallel resonant circuit, causing a measurement voltage to be generated across the parallel resonant circuit to determine the contact impedance between the dual-plate neutral electrode and the medical object. This allows the control module to adjust the energy delivered by the power module to the surgical electrode based on the measurement voltage. The frequency of the excitation signal is matched with the resonant frequency of the parallel resonant circuit, and the dual-plate neutral electrode, the parallel resonant circuit, and the excitation signal source are in the same electrical isolation region.

11. The impedance detecting apparatus according to claim 10, wherein The parallel resonant circuit includes: An inductor, the two ends of which are respectively connected to one electrode of the dual-plate neutral electrode; and A first capacitor and a second capacitor are connected together. The first terminal of the first capacitor is connected to one end of the inductor, and the second terminal of the second capacitor is connected to the other end of the inductor. The second terminal of the first capacitor and the first terminal of the second capacitor are connected together and then connected to the power module to shunt the high-frequency current.

12. The impedance detection apparatus according to claim 10, wherein Also includes: A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage; A measurement module, coupled to the signal processing module, is used to determine the measurement result of the contact impedance based on the processed measurement voltage; as well as An isolation transmission module, coupled between the measurement module and the control module, is used to electrically isolate the measurement module from the control module and transmit the measurement results to the control module.

13. The impedance detection device according to claim 12, characterized in that, Determining the contact impedance measurement result based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, determining whether the determined impedance value exceeds a preset threshold, and using the impedance value and the determination result as the measurement result. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: if the determination result indicates that the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

14. The impedance detection apparatus according to claim 13, wherein The measurement module is also used to issue a warning signal when the impedance value exceeds the preset threshold.

15. The impedance detection device of claim 10, wherein, Determining the contact impedance measurement result based on the processed measurement voltage includes: determining the impedance value of the contact impedance based on the processed measurement voltage, and using the impedance value as the measurement result. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining whether the impedance value exceeds a preset threshold; if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

16. The impedance detection apparatus of claim 12, wherein, The signal processing module includes: An amplifier circuit is used to amplify the measured voltage; and An analog-to-digital converter circuit is used to convert the amplified measured voltage into an analog-to-digital value to obtain the processed measured voltage.

17. The impedance detection apparatus of claim 12, wherein, The parallel resonant circuit, the excitation signal source, the signal processing module, the measurement module, and the isolation transmission module are integrated on the same circuit board.

18. The impedance detection device of claim 10, wherein, Also includes: A signal processing module, coupled to the parallel resonant circuit, is used to process the measured voltage; An isolation transmission module, coupled between the signal processing module and the control module, is used to electrically isolate the signal processing module from the control module and transmit the processed measured voltage to the control module. Adjusting the energy delivered by the power module to the surgical electrode based on the measured voltage includes: determining the impedance value of the contact impedance based on the processed measured voltage, determining whether the impedance value exceeds a preset threshold, and if the impedance value exceeds the preset threshold, cutting off or reducing the energy delivered by the power module to the surgical electrode.

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