Intelligent bipolar electrotome system and control method thereof

Abstract

The invention provides an intelligent bipolar electrotome system and a control method thereof, and solves the problems of electrotome switching and the like, the intelligent bipolar electrotome system comprises an MCU module, the MCU module is connected with a voltage and current sampling circuit through an inverter circuit, the voltage and current sampling circuit is connected with the MCU module through an AD conversion module, the inverter circuit is connected with a high-voltage direct-current power supply, and the high-voltage direct-current power supply is connected with the MCU module. The MCU module is connected with an instrument identification module and a switch module, and the MCU module is connected with a data storage module and a screen display control module. The device has the advantages of convenience in instrument switching, good temperature control effect and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric knife control systems, and in particular relates to an intelligent bipolar electric knife system and a control method thereof. Background Art

[0002] Existing bipolar electrical equipment uses the two ends of a pair of pliers or scissors as the two poles, which are used as the working pole and the loop pole in the monopolar high-frequency electric knife. The DC of the high-frequency electric knife is limited to a small amount of tissue in the direct action area of ​​the pliers, and has no other connection with the human body. When the high-frequency and high-voltage current generated by the bipolar electric knife passes through the high-impedance tissue, it will generate heat in the tissue, causing the tissue to vaporize or coagulate. During the use of electrosurgery, the resistance ranges from 100 ohms to 2000 ohms. As the tissue coagulates, the water in the cells will vaporize, causing the tissue to dry, resulting in a continuous increase in resistance, and finally the current stops completely. However, in actual use, the existing bipolar electrical equipment is inconvenient for the electric knife and the switching of working modes. In addition, the temperature control accuracy cannot be guaranteed during the cutting process, which is prone to cause unnecessary heat damage.

[0003] In order to solve the shortcomings of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a single-stage high-frequency electrosurgical device for achieving low thermal damage [202111091411.2], which includes a power module, an output module, a control module, a pedal module, an interface module and a human-computer interaction module. The output module includes a symmetrical class E amplifier and an AC detection circuit; the control module is a main control chip, and the pedal module includes a pedal; the human-computer interaction module is a touch screen; the symmetrical class E amplifier is connected to the electrosurgical pen and the back plate through the interface module, and the water pump is connected to the electrosurgical pen through the preset through-hole of the electrosurgical pen with a cooling circuit, and the cooling circuit is fitted with a heat sink.

[0004] The above solution solves the problem of temperature control of the electrosurgical knife to a certain extent, but the solution still has many shortcomings, such as the working mode and inconvenient instrument switching. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent bipolar electrosurgical unit with reasonable design and convenient instrument switching in view of the above problems.

[0006] Another object of the present invention is to provide an intelligent bipolar electrosurgical unit control method with high temperature control accuracy in order to solve the above-mentioned problems.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an intelligent bipolar electrosurgical unit system, comprising an MCU module, the MCU module is connected to a voltage and current sampling circuit via an inverter circuit, the voltage and current sampling circuit is connected to the MCU module via an AD conversion module, the inverter circuit is connected to a high-voltage DC power supply, the MCU module is connected to an instrument identification module and a switch module, and the MCU module is connected to a data storage module and a screen display control module.

[0008] In the above-mentioned intelligent bipolar electrosurgical unit system, the instrument identification module includes an instrument identification socket and an instrument identification plug. An infrared sensor is installed on the instrument identification socket, and an identification structure corresponding to the infrared sensor is distributed on the instrument identification plug.

[0009] In the above-mentioned intelligent bipolar electrosurgical unit system, the identification structure includes identification points arranged in a matrix on the instrument identification plug, the infrared sensors correspond to the identification points one by one, and the identification points on the instrument identification plugs connected to different instruments have different colors.

[0010] In the above-mentioned intelligent bipolar electrosurgical unit system, eight identification points arranged in a matrix are arranged on the instrument identification plug, identification ports corresponding to the identification points are opened on the instrument identification socket, and infrared sensors are respectively installed in the identification ports.

[0011] In the above-mentioned intelligent bipolar electrosurgical unit system, the MCU module is connected to a speaker.

[0012] In the above-mentioned intelligent bipolar electrosurgical unit system, the inverter circuit includes a transformer T7 connected to a high-voltage DC power supply, the transformer T7 is connected to a gate driver U26 through a MOS tube D35, the transformer T7 is connected to output interfaces OUT1 and OUT2 through transformers T6 and T9, and relays K1-K4 are connected therebetween, and transformers T6 and T9 are connected to mutual inductors T8 and T11.

[0013] In the above-mentioned intelligent bipolar electrosurgical unit system, a fuse F2 and capacitors C150 and C151 are connected between the high-voltage DC power supply and the transformer, a resistor R105 and capacitors C156-C159 are connected to the gate driver U26, resistors R105, R108 and a diode D37 are connected between the gate driver U26 and the MOS tube D35, a capacitor C163 is connected between the MOS tube D35 and the transformer T7, an inductor L4 and capacitors C148, C152 and C153 are connected between the transformer T6 and the relays K1 and K3, and a capacitor C155 is connected between the transformer T9 and the relays K2 and K4.

[0014] In the above-mentioned intelligent bipolar electrosurgical unit system, the voltage and current sampling circuit includes a voltage sampling circuit and a current sampling circuit, and the voltage sampling circuit and the current sampling circuit respectively have a signal rectification circuit and a signal filtering circuit.

[0015] A control method for an intelligent bipolar electrosurgical unit system adopts the intelligent bipolar electrosurgical unit system, comprising the following steps:

[0016] S1: The system waits for key or foot activation;

[0017] S2: Excite and determine whether the clamp head is short-circuited or open-circuited. If so, return to step S1; otherwise, go to step S3;

[0018] S3: output and detect energy;

[0019] S4: Stop output.

[0020] In the above-mentioned control method of an intelligent bipolar electrosurgical unit, step S3 comprises the following steps:

[0021] S31: Determine whether the preset time has been reached, and if so, calculate the impedance change rate;

[0022] S32: Constant current output, judging whether the impedance reaches the preset resistance value;

[0023] S33: Constant power output, judging whether the impedance reaches the preset resistance value;

[0024] S34: Constant voltage output, judging whether the impedance reaches the preset resistance value.

[0025] Compared with the existing technology, the advantages of the present invention are: the MCU module is connected to the instrument identification module, the electric instrument can be quickly plugged in and replaced and the instrument can be identified, ensuring the adaptive adjustment of the power of the electric knife; the inverter circuit meets the power supply and voltage and current signal sampling requirements, and adjusts the output power according to the feedback of the MCU module to achieve precise control of the temperature of the electric knife; the voltage and current sampling circuit processes the circuit signal to ensure the accuracy of subsequent signal recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a system principle diagram of the present invention;

[0027] Figure 2 is a circuit diagram of an inverter circuit of the present invention;

[0028] Figure 3 is another circuit schematic diagram of the inverter circuit of the present invention;

[0029] Figure 4 It is a circuit diagram of a voltage and current sampling circuit of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the device identification socket of the present invention;

[0031] Figure 6 is a schematic diagram of the structure of the device identification plug of the present invention;

[0032] Figure 7 is a load variation diagram of the present invention;

[0033] Figure 8 is an impedance variation diagram of the present invention;

[0034] Fig. 9 It is the principle diagram of the control method of the present invention;

[0035] In the figure, MCU module 1, speaker 11, inverter circuit 2, voltage and current sampling circuit 3, high-voltage DC power supply 4, instrument identification module 5, instrument identification socket 51, instrument identification plug 52, infrared sensor 53, identification point 54, switch module 6, data storage module 7, screen display control module 8, and AD conversion module 9. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1-6 As shown, an intelligent bipolar electrosurgical system automatically identifies the impedance of the clamp head with continuous and instant feedback, and instantly adjusts the output current and voltage; it specifically includes an MCU module 1, the MCU module 1 is connected to a voltage and current sampling circuit 3 through an inverter circuit 2, the voltage and current sampling circuit 3 is connected to the MCU module 1 through an AD conversion module 9, the inverter circuit 2 is connected to a high-voltage DC power supply 4, the MCU module 1 is connected to an instrument identification module 5 and a switch module 6, and the MCU module 1 is connected to a data storage module 7 and a screen display control module 8. After the instrument identification module 5 identifies the type of the connected instrument, the MCU module 1 adjusts the output voltage and current, and the screen display control module 8 indicates it.

[0038] Specifically, unlike the conventional inductive identification structure, the device identification module 5 in this embodiment includes a device identification socket 51 and a device identification plug 52. An infrared sensor 53 is installed on the device identification socket 51, and an identification structure corresponding to the infrared sensor 53 is distributed on the device identification plug 52. The infrared sensor 53 senses the device identification plug 52, and the MCU module 1 determines the type and specification of the device connected to the device identification plug 52, so as to adjust the parameters.

[0039] In order to improve its recognition range, the recognition structure includes recognition points 54 arranged in a matrix on the device recognition plug 52, and the infrared sensors 53 correspond to the recognition points 54 one by one. The recognition points 54 on the device recognition plug 52 connected to different devices have different colors. By sensing whether the recognition points 54 are painted black, different devices correspond to different combinations of black recognition points 54, so that the device recognition module 5 has a larger recognition range.

[0040] Furthermore, the device identification plug 52 is provided with eight identification points 54 arranged in a matrix, and the device identification socket 51 is provided with identification ports corresponding to the identification points 54, and infrared sensors 53 are respectively installed in the identification ports. When the device identification socket 51 and the device identification plug 52 are plugged in, the infrared sensor 53 detects the identification points 54, and the different numbers and positions of the black identification points 54 distinguish the devices.

[0041] Furthermore, the MCU module 1 is connected to a speaker 11, which usually cooperates with the screen display control module 8 to broadcast images and audio to remind the operator.

[0042] In addition, the inverter circuit 2 includes a transformer T7 connected to the high-voltage DC power supply 4, the transformer T7 is connected to the gate driver U26 through the MOS tube D35, the transformer T7 is connected to the output interface OUT1, OUT2 through the transformers T6, T9 and relays K1-K4 are connected therebetween, and the transformer T6 and the transformer T9 are connected to the mutual inductors T8, T11.

[0043] At the same time, a fuse F2 and capacitors C150 and C151 are connected between the high-voltage DC power supply 4 and the transformer, a resistor R105 and capacitors C156-C159 are connected to the gate driver U26, resistors R105, R108 and a diode D37 are connected between the gate driver U26 and the MOS tube D35, a capacitor C163 is connected between the MOS tube D35 and the transformer T7, an inductor L4 and capacitors C148, C152, C153 are connected between the transformer T6 and the relays K1 and K3, and a capacitor C155 is connected between the transformer T9 and the relays K2 and K4.

[0044] It can be seen that the voltage and current sampling circuit 3 includes a voltage sampling circuit and a current sampling circuit, and the voltage sampling circuit and the current sampling circuit have a signal rectification circuit and a signal filtering circuit respectively.

[0045] like Fig. 9 As shown, a control method of an intelligent bipolar electrosurgical unit system adopts the intelligent bipolar electrosurgical unit system, comprising the following steps:

[0046] S1: The system waits for key or foot activation;

[0047] S2: Excite and determine whether the clamp head is short-circuited or open-circuited. If so, return to step S1; otherwise, go to step S3;

[0048] S3: output and detect energy;

[0049] S4: Stop output.

[0050] Meanwhile, step S3 includes the following steps:

[0051] S31: Determine whether the preset time has been reached, and if so, calculate the impedance change rate;

[0052] S32: Constant current output, judging whether the impedance reaches the preset resistance value;

[0053] S33: Constant power output, judging whether the impedance reaches the preset resistance value;

[0054] S34: Constant voltage output, judging whether the impedance reaches the preset resistance value.

[0055] like Figure 7-8 As shown, the system outputs constant current when the impedance is below R2, constant power output between R2 and R5, and constant voltage output after R5. Impedance greater than R15 indicates that the tissue has been coagulated, and the system stops energy output and issues a prompt sound and screen interface prompt. The horizontal coordinates R1 to R15 in the ordinary bipolar electrosurgical knife diagram are fixed values. The values ​​of R2, R5 and R15 are dynamically adjusted according to the different characteristics of the tissue. The host outputs a small signal in the first 200ms of power-on excitation to determine whether the clamp head is open or short-circuited and the tissue characteristics. The tissue characteristics are determined by the impedance change rate of the tissue. MCU module 1 collects voltage and current data 10,000 times per second, records the first 100 groups of data as output data, and the last 100 groups of data as end data, finds the central value in the data, impedance Z = U / I, impedance change rate ΔZ = Z2-Z1 / t, where Z1 is the impedance calculated for the first 100 groups of data, and Z2 is the impedance calculated for the last 100 groups of data. The figure below is a power curve of a 7mm arterial blood vessel, where R2 is 25 ohms, R5 is 100 ohms, and R15 is 1000 ohms.

[0056] To sum up, the principle of this embodiment is that the inverter circuit 2 supplies power to the system, and the voltage and current sampling circuit 3 performs sampling at the same time, the device identification module 5 identifies the type and specifications of the connected device, the inverter circuit 2 monitors impedance changes, and the MCU module 1 controls the output voltage and current.

[0057] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0058] Although this article uses more terms such as MCU module 1, speaker 11, inverter circuit 2, voltage and current sampling circuit 3, high-voltage DC power supply 4, device identification module 5, device identification socket 51, device identification plug 52, infrared sensor 53, identification point 54, switch module 6, data storage module 7, screen display control module 8, AD conversion module 9, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. An intelligent bipolar electrosurgical unit system, comprising an MCU module (1), wherein the MCU module (1) is connected to a voltage and current sampling circuit (3) via an inverter circuit (2), wherein the voltage and current sampling circuit (3) is connected to the MCU module (1) via an AD conversion module (9), and wherein the inverter circuit (2) is connected to a high-voltage DC power supply (4), characterized in that: The MCU module (1) is connected to a device identification module (5) and a switch module (6), and the MCU module (1) is connected to a data storage module (7) and a screen display control module (8).

2. The intelligent bipolar electrosurgical unit according to claim 1, characterized in that: The device identification module (5) comprises a device identification socket (51) and a device identification plug (52); an infrared sensor (53) is installed on the device identification socket (51); and an identification structure corresponding to the infrared sensor (53) is distributed on the device identification plug (52).

3. The intelligent bipolar electrosurgical unit according to claim 2, characterized in that: The identification structure comprises identification points (54) arranged in a matrix on the device identification plug (52), the infrared sensors (53) correspond to the identification points (54) one by one, and the identification points (54) on the device identification plugs (52) connected to different devices have different colors.

4. The intelligent bipolar electrosurgical unit according to claim 2, characterized in that: The device identification plug (52) is provided with eight identification points (54) arranged in a matrix, the device identification socket (51) is provided with identification ports corresponding to the identification points (54) one by one, and the infrared sensors (53) are respectively installed in the identification ports.

5. The intelligent bipolar electrosurgical unit according to claim 1, characterized in that: The MCU module (1) is connected to a speaker (11).

6. The intelligent bipolar electrosurgical unit according to claim 1, characterized in that: The inverter circuit (2) comprises a transformer T7 connected to a high-voltage DC power supply (4); the transformer T7 is connected to a gate driver U26 via a MOS tube D35; the transformer T7 is connected to output interfaces OUT1 and OUT2 via transformers T6 and T9, with relays K1-K4 connected therebetween; and the transformer T6 and the transformer T9 are connected to mutual inductors T8 and T11.

7. The intelligent bipolar electrosurgical unit according to claim 6, characterized in that: A fuse F2 and capacitors C150 and C151 are connected between the high-voltage DC power supply (4) and the transformer; a resistor R105 and capacitors C156-C159 are connected to the gate driver U26; resistors R105, R108 and a diode D37 are connected between the gate driver U26 and the MOS tube D35; a capacitor C163 is connected between the MOS tube D35 and the transformer T7; an inductor L4 and capacitors C148, C152 and C153 are connected between the transformer T6 and the relays K1 and K3; and a capacitor C155 is connected between the transformer T9 and the relays K2 and K4.

8. The intelligent bipolar electrosurgical unit according to claim 1, characterized in that: The voltage and current sampling circuit (3) comprises a voltage sampling circuit and a current sampling circuit, and the voltage sampling circuit and the current sampling circuit respectively have a signal rectification circuit and a signal filtering circuit.

9. A control method for an intelligent bipolar electrosurgical unit, using the intelligent bipolar electrosurgical unit described in claims 1 to 8, characterized in that: The steps include: S1: The system waits for key or foot activation; S2: Excite and determine whether the clamp head is short-circuited or open-circuited. If so, return to step S1; otherwise, go to step S3; S3: output and detect energy; S4: Stop output.

10. The control method of the intelligent bipolar electrosurgical unit according to claim 9, characterized in that: The step S3 comprises the following steps: S31: Determine whether the preset time has been reached, and if so, calculate the impedance change rate; S32: Constant current output, judging whether the impedance reaches the preset resistance value; S33: Constant power output, judging whether the impedance reaches the preset resistance value; S34: Constant voltage output, judging whether the impedance reaches the preset resistance value.

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