A plasma ablation surgical electrode with a thin film protective layer

Abstract

The present invention discloses a plasma ablation surgical electrode with a thin film protective layer, comprising: a loop electrode, a knife handle, and a ceramic fixed end; a conduction channel is provided in the length direction of the loop electrode; the knife handle is connected to one end of the loop electrode, and the ceramic fixed end is connected to the other end of the loop electrode; a needle electrode is provided at one end of the ceramic fixed end away from the loop electrode, and the surface of the needle electrode is coated with a C / SiC nano-network structure film. A network structure film is formed by chemically bonding and cross-linking high-density graphene nanocrystals and SiC nanoparticles; high-density graphene forms a conductive network, the withstand voltage is increased, the discharge stability is enhanced, and the plasma temperature and thermal damage can be effectively reduced. A small amount of nano-SiC particles are dispersed to enhance hardness, adhesion and corrosion resistance, so that the C / SiC nano-network structure film effectively reduces the working temperature and thermal damage depth of the electrode, and improves the safety and efficiency of the ablation surgery.

Description

Technical Field

[0001] The invention relates to the technical field of plasma ablation, and in particular to a plasma ablation surgical electrode with a thin film protective layer. Background Art

[0002] The principle of low-temperature plasma ablation is that after the plasma power source generates a square wave signal, the blade discharges in a medium such as saline to generate a plasma vapor sheath, and uses the energy of the vapor sheath to open the molecular bonds between cells to achieve the effect of decomposing proteins. The power source used can excite saline and other media with ultra-low frequency electricity to generate plasma. Due to the low frequency, the frictional heat generated between molecules can be greatly reduced, allowing the ablation operation to be completed at a low temperature.

[0003] At present, the electrodes of ablation surgical equipment have reached a certain level of maturity and can be used to perform ablation treatment on a certain tissue of the human body according to the needs of the patient. However, the electrodes of ablation surgical equipment currently circulating on the market have obvious shortcomings. For example, the electric knife relies on the radio frequency electrothermal effect. Since its working temperature is very high, when ablation is performed on a certain tissue, it may cause serious thermal damage and accidentally injure surrounding tissues, that is, the accuracy is insufficient. Therefore, the current ablation surgical equipment urgently needs excellent performance such as high precision, small damage, and minimizing the patient's pain level.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a plasma ablation surgical electrode with a thin film protective layer, aiming to solve the problems of insufficient precision of electrodes of existing ablation surgical equipment, resulting in serious thermal damage and accidental injury to surrounding tissues.

[0006] The technical solution of the present invention is as follows:

[0007] A plasma ablation surgical electrode with a thin film protective layer, comprising:

[0008] A loop electrode, wherein a conducting channel is provided in the length direction of the loop electrode;

[0009] A knife handle connected to one end of the loop electrode;

[0010] A ceramic fixed end is connected to the end of the loop electrode away from the shank; a needle-shaped electrode is provided at the end of the ceramic fixed end away from the loop electrode, and a surface of the needle-shaped electrode is coated with a C / SiC nano-network structure film.

[0011] The plasma ablation surgical electrode with a thin film protective layer comprises at least three needle-shaped electrodes which are arranged parallel to each other.

[0012] The plasma ablation surgical electrode with a thin film protective layer, wherein the material of the needle-shaped electrode is platinum alloy.

[0013] The plasma ablation surgical electrode with a thin film protective layer, wherein the C / SiC nano-network structure film is formed by graphene nanocrystals and SiC nanoparticles through chemical bonding and cross-linking.

[0014] The plasma ablation surgical electrode with a thin film protective layer, wherein the thickness of the C / SiC nano-network structure film is 10nm to 15nm.

[0015] The plasma ablation surgery electrode with a thin film protective layer, wherein the plasma ablation surgery electrode with a thin film protective layer further comprises:

[0016] A needle-shaped electrode wire, used to connect the needle-shaped electrode to a power source;

[0017] The loop electrode wire is used to connect the loop electrode to a power source.

[0018] The plasma ablation surgery electrode with a thin film protective layer, wherein the plasma ablation surgery electrode with a thin film protective layer further comprises:

[0019] A physiological saline re-sucking port is located at the center of the ceramic fixed end away from the loop electrode;

[0020] A physiological saline re-suction port catheter, connected to the physiological saline re-suction port and located in the conducting channel;

[0021] A physiological saline outlet is located on the side wall of the loop electrode;

[0022] The physiological saline outlet conduit is connected to the physiological saline outlet and is located in the conducting channel.

[0023] The plasma ablation surgical electrode with a thin film protective layer, wherein the outer surface of the loop electrode is covered with a Teflon hose.

[0024] The plasma ablation surgery electrode with a thin film protective layer, wherein the plasma ablation surgery electrode with a thin film protective layer further comprises: a control module, a first chip and a second chip;

[0025] The control module is used to control the first chip to send electrocoagulation and ablation signals to the needle electrode, and to control the second chip to send physiological saline control signals to the circulation pump.

[0026] The plasma ablation surgical electrode with a thin film protective layer, wherein the wall thickness of the loop electrode is 0.2mm-0.5mm; and the outer diameter of the loop electrode is 4.2mm-5mm.

[0027] Beneficial effects: The present invention provides a plasma ablation surgical electrode with a thin film protective layer, comprising: a loop electrode, a knife handle, and a ceramic fixed end; a conductive channel is provided in the length direction of the loop electrode; the knife handle is connected to one end of the loop electrode, and the ceramic fixed end is connected to the other end of the loop electrode; a needle electrode is provided at one end of the ceramic fixed end away from the loop electrode, and the surface of the needle electrode is coated with a C / SiC nano-network structure film. The network structure film is formed by chemically bonding and cross-linking high-density graphene nanocrystals and SiC nanoparticles, wherein the randomness of the growth arrangement of the graphene nanocrystals determines its network structure; high-density graphene forms a conductive network, the withstand voltage is increased, the discharge stability is enhanced, and the plasma temperature and thermal damage can be effectively reduced. A small amount of nano-SiC particles are dispersed to enhance hardness, adhesion and corrosion resistance, so that the C / SiC nano-network structure film effectively reduces the working temperature and thermal damage depth of the electrode, and improves the safety and efficiency of the ablation surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a plasma ablation surgical electrode with a thin film protective layer according to the present invention;

[0029] Figure 2 for Figure 1 A local schematic diagram in FIG.

[0030] Figure 3 Schematic diagram of the microstructure of the C / SiC nano-network structure film in the present invention;

[0031] Figure 4 Schematic diagram of the preparation process of the C / SiC nano-network structure film in the present invention;

[0032] Figure 5 It is the working flow chart of the control module in the present invention;

[0033] Figure 6 It is a schematic diagram of ablation of a plasma ablation surgical electrode with a thin film protective layer according to the present invention;

[0034] Figure 7 It is a schematic diagram of the physiological saline delivery path in the present invention;

[0035] Figure 8 A comparison diagram of the working temperatures of plasma ablation surgery electrodes with and without the C / SiC nano-network structure film of the present invention;

[0036] Fig. 9 A comparison diagram of thermal damage depth of plasma ablation surgery electrodes with and without the C / SiC nano-network structure film of the present invention;

[0037] Description of the drawings: loop electrode 10, conduction channel 101, knife handle 20, ceramic fixed end 30, needle electrode 40, needle electrode wire 50, loop electrode wire 60, saline re-suction port 70, saline re-suction port catheter 701, saline outlet 80, saline outlet catheter 801, target tissue 90, graphene nanocrystals a, SiC nanoparticles b, amorphous carbon matrix c. DETAILED DESCRIPTION

[0038] The present invention provides a plasma ablation surgical electrode with a thin film protective layer. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] Recent studies have found that the use of low-temperature plasma technology can achieve precise removal of human soft tissue and significantly reduce thermal damage to non-target tissue. However, in view of the requirements of this technology for equipment, the development of electrodes suitable for low-temperature plasma ablation surgery requires special design and protective coating. However, the working temperature and thermal damage depth of existing electrodes used for low-temperature plasma ablation surgery are not ideal when removing human soft tissue. Therefore, there is an urgent need for an ablation surgery electrode with low working temperature and shallow thermal damage depth.

[0040] Based on this, Figure 1-2 As shown, the present invention provides a plasma ablation surgery electrode with a thin film protective layer, comprising:

[0041] A loop electrode 10, wherein a conducting channel 101 is provided in the length direction of the loop electrode;

[0042] A knife handle 20, wherein the knife handle 20 is connected to one end of the loop electrode 10;

[0043] A ceramic fixed end 30 is connected to the end of the loop electrode 10 away from the shank 20; a needle-shaped electrode 40 is provided at the end of the ceramic fixed end 30 away from the loop electrode 10, and the needle-shaped electrode 40 is composed of a needle-shaped metal and a C / SiC nano-network structure film coated on the surface of the needle-shaped metal.

[0044] In the present invention, a C / SiC nano-network structure film is used as a protective coating for the needle-shaped electrode, and a conductive network is formed by high-density graphene, so that the withstand voltage is increased, the discharge stability is enhanced, and the plasma temperature and thermal damage can be effectively reduced. A small amount of nano-SiC particles dispersed in the C / SiC nano-network structure film can enhance hardness, adhesion and corrosion resistance; thereby, the protective coating effectively reduces the working temperature and thermal damage depth of the electrode, and improves the safety and efficiency of the ablation operation.

[0045] Specifically, Figure 3 As shown, the C / SiC nano-network structure film is formed by high-density graphene nanocrystals a and SiC nanoparticles b through chemical bonding and cross-linking, and is embedded in an amorphous carbon matrix c; the silicon target and the carbon target reach the substrate after microwave plasma sputtering, and under the induction of high-flux electrons, the doping of Si affects the growth of graphene nanocrystals in the film, the size of the graphene nanocrystals is reduced, and its growth orientation changes from vertical arrangement to random arrangement; during the growth of the film, the increase of Si atoms can strongly combine with carbon to form Si-C bonds, thereby forming SiC compounds; and the edge of the graphene sheet has higher energy and is the preferred site for the nucleation of SiC nanoparticles, and SiC nanoparticles with a size between 2 and 5 nm continue to be uniformly embedded in the film with random orientation. Si doping mainly changes the growth pattern of graphene nanocrystals instead of destroying the graphene sheets, so that the film has good conductivity; when SiC nanoparticles are embedded in the amorphous carbon matrix c, its thermal stability and other properties are improved; the randomness of the growth arrangement of graphene nanocrystals determines the network structure of the film, and the high-density graphene forms a conductive network, which increases the withstand voltage of the C / SiC nano-network structure film and enhances the discharge stability, which can effectively reduce the plasma temperature and thermal damage, and the dispersion of a small amount of nano-SiC particles can enhance the hardness, adhesion and corrosion resistance, so that the protective coating effectively reduces the working temperature and thermal damage depth of the electrode, and improves the safety and efficiency of ablation surgery.

[0046] In some embodiments, the needle electrode 40 is made of platinum alloy, that is, the material of the needle electrode is platinum alloy; this part is the main working area during the ablation operation, which can generate plasma to achieve precise ablation and coagulation of human tissue.

[0047] Optionally, the medium used to generate plasma in the present invention is physiological saline, which is less harmful to the human body and has a higher threshold for the amount that the human body can accept. Therefore, physiological saline is selected as the medium for generating plasma, which can not only meet the environmental requirements of low-temperature plasma ablation surgery, but also reduce the negative impact on the human body, and the cost is relatively low. Of course, if there are special circumstances, other media can be selected according to surgical requirements.

[0048] Specifically, after the plasma ablation surgical electrode with a thin film protective layer is powered on, the needle-shaped electrode 40 can reach the target position, discharge and excite the medium in a physiological saline environment, generate a plasma vapor sheath, and then use the energy of the sheath to easily open the molecular binding bonds between cells, thereby decomposing proteins and completing the task of ablating the target tissue. In other words, the high-energy particles in the plasma generated by the plasma ablation surgical electrode of the present invention can decompose the molecules in the tissue and achieve the purpose of ablation through a chemical process.

[0049] In some embodiments, the needle-shaped electrodes 40 include at least three and are arranged in parallel with each other; in a preferred embodiment, the needle-shaped electrodes include three. The needle-shaped electrodes are arranged in parallel to each other to increase the working area under the condition of constant power, and also improve the fault tolerance of the electrode operation.

[0050] Optionally, both ends of the needle-shaped electrode 40 are directly embedded in the ceramic fixing end 30 , so that the needle-shaped electrode will not become loose.

[0051] In some embodiments, the thickness of the C / SiC nano-network structure film is 10 nm to 15 nm; Figure 4 As shown, by using microwave plasma dual-target magnetron sputtering technology, high-density graphene nanocrystals and silicon carbide nanoparticles are cross-linked on the surface of the metal needle-shaped electrode to form the C / SiC nano-network structure film by microwave sputtering using microwave plasma as an irradiation electron source and DC magnetron sputtering (carbon target and silicon target); the electron density in the vacuum cavity is controlled, the substrate bias voltage is between +20 and 200 V, and the ultra-high current density is 95 to 105 mA / cm 2 The ultra-high electron flux (the amount of electrons transmitted per unit time) is 1.22×10 21 ~1.28×10 21 mm -2 s -1 A large number of edge-state-rich graphene nanocrystals and silicon carbide nanoparticles doped in the graphene network are induced to grow by ultra-high electron flux, forming a unique C / SiC nano-network structure film formed by cross-linking high-density graphene nanocrystals and silicon carbide nanoparticles. The thickness of the film is between 10nm and 15nm, and the size of the silicon carbide nanoparticles doped in the graphene network is less than 5nm on average, making the carbon nanofilm extremely smooth with a roughness of less than 2nm. The non-directional growth of graphene nanocrystals is regulated by silicon carbide compound particles, so that the overall structure of the prepared C / SiC nano-network structure film is dense and uniform, without obvious defects such as pores or voids.

[0052] In some embodiments, Figure 2As shown, the plasma ablation surgical electrode with a thin film protective layer also includes: a needle electrode wire 50 and a loop electrode wire 60; the needle electrode wire 50 is used to connect the needle electrode 40 to a power source to achieve energy supply and data transmission; the loop electrode wire 60 is used to connect the loop electrode 10 to a power source to also achieve energy supply and data transmission.

[0053] In some embodiments, the plasma ablation surgical electrode with a thin film protective layer further includes: a saline re-suction port 70 , a saline re-suction port catheter 701 , a saline outlet 80 , and a saline outlet catheter 801 .

[0054] The physiological saline re-absorption port 70 is located at the center of the end of the ceramic fixing end 30 away from the return electrode 10, and can be used to recycle excess physiological saline during the ablation procedure;

[0055] The saline re-suction port conduit 701 is connected to the saline re-suction port 70 and is located in the conducting channel 101, and optionally, the other end of the saline re-suction port conduit is connected to a first container containing saline, so as to store the recovered saline;

[0056] The physiological saline outlet 80 is located on the side wall of the loop electrode 10, and during the ablation procedure, physiological saline can be outputted therefrom to provide a physiological saline environment for the ablation procedure;

[0057] The saline outlet conduit 801 is connected to the saline outlet 80 and is located in the conducting channel 101, and optionally, the other end of the saline outlet conduit is connected to a second container containing saline to provide saline for ablation surgery.

[0058] In a preferred embodiment, the first container and the second container are the same container, thereby achieving recycling of the physiological saline.

[0059] In some embodiments, the outer surface of the return electrode is covered with a Teflon hose to prevent the return electrode from being accidentally damaged, such as scratched.

[0060] In some embodiments, the ceramic fixing end is fixed to the loop electrode by adhesive bonding to fix the needle-shaped electrode. The fixing by adhesive bonding is not easy to fall off during use and is convenient for later maintenance of the ceramic fixing end.

[0061] In some embodiments, Figure 5As shown, the plasma ablation surgical electrode with a thin film protective layer also includes: a control module, a first chip and a second chip; the control module is used to control the first chip to send electrocoagulation and ablation signals to the needle electrode, and to control the second chip to send saline control signals to the circulation pump. The control module is electrically connected to the first chip and the power supply in sequence, and the control module is electrically connected to the second chip and the circulation pump in sequence, so as to achieve the control of the start and end of the operation of the cutting head and the control of the delivery and reabsorption of saline through the control module. Optionally, the control module is connected to the first chip and the power supply by welding; the control module is connected to the second chip and the circulation pump by welding.

[0062] Specifically, the control module is responsible for controlling the internal chip (first chip) of the blade working power supply to generate electrocoagulation and ablation signals to the needle electrode, thereby controlling the start and end of the blade operation; and is also responsible for controlling the chip (second chip) for delivering saline solution to send signals to the circulation pump, so that saline solution can be smoothly delivered to the working end of the blade through the saline outlet 80, and at the same time, excess saline solution can be sucked back through the saline re-suction port.

[0063] In some embodiments, the wall thickness of the loop electrode 10 is 0.2mm-0.5mm; the outer diameter of the loop electrode is 4.2mm-5mm; since the target tissue is located in some narrow spaces in the human body, the wall thickness of the loop electrode is between 0.2 and 0.5mm, and the outer diameter of the loop electrode is between 4.2 and 5mm, which can save the space occupied by the plasma ablation surgical electrode and reduce the weight of the plasma ablation surgical electrode while ensuring rigidity.

[0064] In some embodiments, the handle 20 is made of PC / ABS material, so that the handle 20 has good flexibility, heat resistance and dimensional stability.

[0065] The following further examples are given to illustrate the present invention in detail. It should also be understood that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention belong to the scope of protection of the present invention.

[0066] Example 1

[0067] like Figure 1-2 As shown, the plasma ablation surgery electrode with a thin film protective layer described in this embodiment includes:

[0068] A loop electrode 10, wherein a conducting channel 101 is provided in the length direction of the loop electrode;

[0069] A knife handle 20, wherein the knife handle 20 is connected to one end of the loop electrode 10;

[0070] A ceramic fixed end 30 is connected to the end of the loop electrode 10 away from the shank 20; a needle-shaped electrode 40 is provided at the end of the ceramic fixed end 30 away from the loop electrode 10, and the needle-shaped electrode 40 is composed of a needle-shaped metal and a C / SiC nano-network structure film coated on the surface of the needle-shaped metal.

[0071] It also includes: a loop electrode wire, a needle electrode wire, a saline re-inhalation port catheter and a saline outlet port catheter arranged in the conduction channel, a saline recovery port arranged at the ceramic fixed end, and a saline outlet port arranged on the side wall of the loop electrode.

[0072] Specifically, one end of the needle electrode wire is connected to the needle electrode with a protective layer (C / SiC nano-network structure film) for power supply and data transmission, while the other end is connected to an ablation device that can power it and send signals. One end of the loop electrode is connected to the loop electrode for power supply and data transmission, while the other end is connected to a designated port of the ablation device. The ceramic fixed end of the surgical blade head has rounded edges to prevent scratching of adjacent tissues around the target tissue and improve surgical safety.

[0073] In this example, after the device is turned on, the plasma module will send an ablation signal to make the needle electrode discharge in the saline environment, stimulate the saline and generate a plasma vapor sheath. After stabilization, it can gradually approach the target tissue 90 and use the energy of the vapor sheath to ablate and coagulate the target tissue. Figure 6 During this process, the plasma module also sends an electrical signal to the circulation pump, so that the saline solution can reach the cutter head from the saline outlet. At the same time, the excess saline solution can be smoothly recovered through the saline reabsorption port. Figure 7 Under the power output of the circulation pump, the output saline passes through the saline output port catheter, reaches the saline output port, and then reaches the knife head; the recovered saline enters the saline re-suction port catheter through the saline re-suction port, and then reaches the designated recovery container.

[0074] Since the surface of the needle-shaped electrode responsible for ablation in the present invention is covered with a C / SiC nano-network structure film and combined with its own size advantage, it can accurately ablate the target tissue and at the same time, the damage to the surrounding non-target tissue is also extremely small.

[0075] After testing, it was found that the C / SiC nano-network structure film on the surface of the needle-shaped electrode can effectively reduce the temperature of the needle-shaped electrode during operation.

[0076] like Figure 8As shown, when the voltage is 100V, the working temperature drops from about 58°C without a protective layer to about 41°C; when the voltage is 150V, the working temperature drops from about 69°C without a protective layer to about 46°C with a protective layer; when the voltage is 200V, the working temperature drops from about 81°C without a protective layer to about 56°C with a protective layer; when the voltage is 250V, the working temperature drops from about 97°C without a protective layer to about 62°C with a protective layer, thereby creating a low-temperature environment during ablation surgery.

[0077] At the same time, it can also effectively reduce the thermal damage depth of the electrode, such as Fig. 9 As shown in the figure, when the voltage is 100V, the thermal damage depth is reduced from about 0.71mm without a protective layer to about 0.51mm with a protective layer; when the voltage is 150V, the thermal damage depth is reduced from about 0.74mm without a protective layer to about 0.54mm with a protective layer; when the voltage is 200V, the thermal damage depth is reduced from about 0.76mm without a protective layer to about 0.55mm with a protective layer; when the voltage is 250V, the thermal damage depth is reduced from about 0.79mm without a protective layer to about 0.56mm with a protective layer, which improves the ablation accuracy while reducing damage to non-target tissues.

[0078] In general, when the electrode with the protective coating operates within a normal operating voltage range, its operating temperature is no higher than 70°C and the depth of thermal damage is less than 0.6mm.

[0079] In summary, the present invention provides a plasma ablation surgical electrode with a thin film protective layer, comprising: a loop electrode, a knife handle, and a ceramic fixed end; a conductive channel is provided in the length direction of the loop electrode; the knife handle is connected to one end of the loop electrode, and the ceramic fixed end is connected to the other end of the loop electrode; a needle electrode is provided at one end of the ceramic fixed end away from the loop electrode, and the surface of the needle electrode is coated with a C / SiC nano-network structure film. A network structure film is formed by chemically bonding and cross-linking high-density graphene nanocrystals and SiC nanoparticles, wherein the randomness of the growth arrangement of graphene nanocrystals determines its network structure; high-density graphene forms a conductive network, the withstand voltage is increased, the discharge stability is enhanced, and the plasma temperature and thermal damage can be effectively reduced. A small amount of nano-SiC particles are dispersed to enhance hardness, adhesion and corrosion resistance, so that the C / SiC nano-network structure film effectively reduces the working temperature and thermal damage depth of the electrode, and improves the safety and efficiency of ablation surgery.

[0080] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A plasma ablation surgical electrode with a thin film protective layer, characterized in that: include: A loop electrode, wherein a conducting channel is provided in the length direction of the loop electrode; A knife handle connected to one end of the loop electrode; A ceramic fixed end, the ceramic fixed end is connected to the end of the loop electrode away from the knife handle; the end of the ceramic fixed end away from the loop electrode is provided with a needle-shaped electrode, and the surface of the needle-shaped electrode is coated with a C / SiC nano-network structure film; The needle-shaped electrodes include at least three and are arranged in parallel with each other; the material of the needle-shaped electrodes is platinum alloy; the C / SiC nano-network structure film is formed by graphene nanocrystals and SiC nanoparticles through chemical bonding and cross-linking; The microwave plasma dual-target magnetron sputtering technology is used to sputter dual targets, i.e., carbon target and silicon target, by microwave sputtering with microwave plasma as the irradiation electron source and direct current magnetron sputtering. Ultra-high electron flux is used to grow high-density graphene nanocrystals on the surface of the needle-shaped electrode and cross-link with silicon carbide nanoparticles to form the C / SiC nano-network structure film, so that the withstand voltage of the surgical electrode is increased, the discharge stability is enhanced, and a low-temperature environment is created during ablation surgery; wherein, during the growth process of the film, the increase of Si atoms combines with carbon to form Si-C bonds, thereby forming SiC compounds; SiC nanoparticles with a size between 2 and 5 nm continue to be uniformly embedded in the film in a random orientation; The thickness of the C / SiC nano-network structure film is 10nm-15nm.

2. The plasma ablation surgical electrode with a thin film protective layer according to claim 1, characterized in that: The plasma ablation surgery electrode with a thin film protective layer also includes: A needle-shaped electrode wire, used to connect the needle-shaped electrode to a power source; The loop electrode wire is used to connect the loop electrode to a power source.

3. The plasma ablation surgical electrode with a thin film protective layer according to claim 2, characterized in that: The plasma ablation surgery electrode with a thin film protective layer also includes: A physiological saline re-sucking port is located at the center of the ceramic fixed end away from the loop electrode; A physiological saline re-suction port catheter, connected to the physiological saline re-suction port and located in the conducting channel; A physiological saline outlet is located on the side wall of the loop electrode; The physiological saline outlet conduit is connected to the physiological saline outlet and is located in the conducting channel.

4. The plasma ablation surgical electrode with a thin film protective layer according to claim 1, characterized in that: The outer surface of the return electrode is covered with a Teflon hose.

5. The plasma ablation surgical electrode with a thin film protective layer according to claim 3, characterized in that: The plasma ablation surgical electrode with a thin film protective layer further comprises: a control module, a first chip and a second chip; The control module is used to control the first chip to send electrocoagulation and ablation signals to the needle electrode, and to control the second chip to send physiological saline control signals to the circulation pump.

6. The plasma ablation surgical electrode with a thin film protective layer according to claim 1, characterized in that: The wall thickness of the loop electrode is 0.2 mm-0.5 mm; the outer diameter of the loop electrode is 4.2 mm-5 mm.

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