Plasma needle electrode with puncturing and water outlet functions

Abstract

The utility model discloses a plasma needle electrode with puncture and water outlet functions, which comprises an operating handle, a cable, a puncture needle, an electrode stem and a water inlet pipe, one end of the cable is arranged in the operating handle, the other end of the cable is connected with a power supply, one end of the electrode stem is arranged on the operating handle, and the other end of the electrode stem is connected with the puncture needle. The puncture needle comprises a puncture blade face and a water dripping hole formed in the puncture blade face, the water inlet pipe penetrates through the operation handle and the electrode rod to be connected with the water dripping hole, and normal saline conveyed by the water inlet pipe flows to the tip end of the puncture needle through the water dripping hole. The electrode has the advantages that the puncture needle which is arranged at the end of the electrode stem and provided with the three puncture blade faces is used for puncturing thick tissue in the operation process, direct puncture can be achieved without the help of a puncture tool in the operation, puncture is easier, wound surfaces are smaller due to the design of the three blade faces of the puncture needle, and the normal saline instillation holes formed in the puncture blade faces are used for instillation of normal saline. The normal saline is automatically supplied, a doctor does not need to repeatedly dip the normal saline, and use is convenient and fast.

Description

Technical Field

[0001] The utility model specifically relates to a plasma needle electrode with puncture and water outlet functions. Background Art

[0002] With the development of medical instruments, many new technologies and new methods have been widely applied in clinical practice, benefiting patients. For example, in current medical surgery practices, plasma knives have been widely used in surgical operations such as cutting and coagulation. The working principle of a plasma knife is that a power source emits radio frequency energy, and through the energy generated by a needle-shaped plasma electrode in the plasma knife, NaCl solution is electrolyzed to generate a plasma thin layer at the knife head (electrode head). The thin layer contains active free radicals, including Na⁺, OH⁺, H⁺, O⁺, and e. Among them, OH⁺ free radicals and e free electrons are very active and can cut and ablate tissues. The temperature is maintained between 40°C and 70°C, and the thermal effect (>60°) generated by the bipolar knife head can inactivate and necrose the cells in the tissue, achieving the effect of intraoperative coagulation.

[0003] Currently, when the plasma ablation technology is used for the treatment of chronic hypertrophic rhinitis, first, local surface anesthesia is performed on the patient, then a puncture instrument is used to puncture and punch holes in the hypertrophic tissue, and finally, the plasma knife head dipped in normal saline is inserted into the punctured holes for tissue ablation;

[0004] Since current plasma knives are basically needle-shaped and have no puncture force, they cannot ablate hypertrophic tissues. In current clinical operations, a puncture instrument needs to be used to assist in the surgical treatment, which is relatively inconvenient;

[0005] In addition, existing plasma knives have no water dripping function. During the operation, normal saline needs to be dipped on the electrode first, and then inserted into the diseased tissue for ablation. After the normal saline at the tip of the needle is used up, the doctor needs to dip the normal saline again and then continue the ablation. The doctor needs to dip the normal saline repeatedly for operation, which will not only increase the operation process of the surgery, consume a large amount of surgical time, but also affect the treatment effect.

[0006] Therefore, a plasma ablation device with a puncture function and the ability to continuously supply normal saline to the electrode end is needed. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is the problem that the existing plasma ablation device mentioned in the background art does not have a puncture function and the ability to automatically supply normal saline, and it is necessary to frequently dip the normal saline during use, resulting in inconvenient operation.

[0008] To solve the above technical problems, a plasma needle electrode with puncture and water outlet functions is proposed, which is realized through the following technical solutions: A plasma needle electrode with puncture and water outlet functions includes an operating handle and a cable. One end of the cable that provides power support for the plasma needle electrode is arranged inside the operating handle, and the other end is connected to an external power supply. Its characteristics are as follows: It also includes a puncture needle, an electrode rod, and a water inlet pipe. One end of the electrode rod is arranged on the operating handle, and the other end is connected to the puncture needle. The puncture needle includes a puncture blade surface and a water dripping hole arranged on the puncture blade surface. The water inlet pipe for supplying normal saline passes through the operating handle and the electrode rod and is connected to the water dripping hole on the puncture blade surface. The normal saline transmitted by the water inlet pipe flows through the water dripping hole to the tip of the puncture needle.

[0009] In the present utility model, a puncture needle with three puncture blade surfaces arranged at the end of the electrode rod is used to puncture thicker tissues during the operation. During the operation, it is not necessary to rely on puncture instruments for direct puncture, making the use and operation more convenient. Moreover, the design of the three-sided blade of the puncture needle makes the puncture easier and the wound surface smaller. Also, by using the normal saline drip holes arranged on the puncture blade surface, normal saline is automatically supplied, eliminating the need for doctors to repeatedly dip in normal saline, which is convenient to use. In addition, the supplied normal saline flows to the tip of the needle through the drip holes, and plasma can be excited when the tip works, which is convenient and fast to use.

[0010] Preferably, three puncture blade surfaces are arranged on the puncture needle, and the three puncture blade surfaces are evenly distributed on the puncture needle. The arrangement of the three puncture blade surfaces of the puncture needle makes the puncture easier and the wound surface smaller.

[0011] Preferably, a water guide groove is arranged on the surface of the puncture blade surface. The water guide groove connects the water dripping hole with the tip of the puncture needle, and the depth of the end of the water guide groove close to the water dripping hole is greater than that of the other end. Such a setting facilitates the collection of normal saline flowing out of the water dripping hole to the tip of the needle, facilitating the stable excitation of plasma.

[0012] Preferably, the water dripping hole is in the shape of a water droplet, and the end with a larger size of the water dripping hole is close to the tip of the puncture needle. Such a setting facilitates the collection of normal saline flowing out of the water dripping hole to the tip of the needle, facilitating the stable excitation of plasma.

[0013] Preferably, a water pipe connector communicating with the water dripping hole is arranged inside the puncture needle. The water inlet pipe is connected to the water dripping hole through the water pipe connector. The setting of the water pipe connector facilitates the connection between the water inlet pipe and the water dripping hole, facilitating the automatic and stable supply of normal saline to the electrode end, avoiding the problem that doctors repeatedly dip in normal saline during the ablation process, and improving the use effect.

[0014] For the optimization of the technical solution of the present utility model, three branch water pipes are arranged at one end of the water inlet pipe, and the three branch water pipes are respectively connected to the water pipe connectors inside the puncture needle. Such an arrangement ensures that each dripping hole can stably and evenly drip physiological saline, guaranteeing the stable excitation of the plasma.

[0015] For the optimization of the technical solution of the present utility model, a cover plate is arranged at the connection end of the electrode rod and the puncture needle. The branch water pipe in the water inlet pipe passes through the cover plate and is connected to the water pipe connector. The setting of the cover plate isolates the puncture needle from the electrode rod, preventing physiological saline from flowing into the electrode rod.

[0016] For the optimization of the technical solution of the present utility model, scales are arranged on the surface of the electrode rod along the extending direction of the electrode rod, and a slidable indicating block is sleeved on the electrode rod. The indicating block cooperates with the scales to represent the puncture depth of the electrode rod. The setting of the indicating block and the scales facilitates the real-time understanding of the puncture depth according to the scale value.

[0017] The beneficial effects of the present utility model compared with the prior art are as follows:

[0018] In the technical solution of the present utility model, a puncture needle with three puncture blade surfaces arranged at the end of the electrode rod is used to puncture thicker tissues during the operation. During the operation, it is not necessary to rely on puncture instruments for direct puncture, making the use and operation more convenient. Moreover, the design of the three-sided blade of the puncture needle makes the puncture easier and the wound surface smaller. Additionally, the physiological saline drip holes arranged on the puncture blade surfaces automatically supply physiological saline, eliminating the need for doctors to repeatedly dip physiological saline, which is convenient to use. In addition, the supplied physiological saline flows to the tip of the needle through the drip holes, and the plasma can be excited when the tip of the needle works, which is convenient and fast to use. Description of the Drawings

[0019] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0020] Figure 2 is a three-dimensional schematic diagram of the puncture needle;

[0021] Figure 3 is a partial cross-sectional view of the puncture needle;

[0022] Figure 4 is a three-dimensional schematic diagram of the electrode rod;

[0023] Figure 5 is a partial cross-sectional view of the electrode rod;

[0024] Figure 6 is Figure 5 the enlarged view at A in

[0025] Figure 7 is a partial cross-sectional view of the present utility model;

[0026] Figure 8 is Figure 7 the enlarged view at position B in

[0027] Explanation of reference numerals in the drawings: 1 - puncture needle, 11 - puncture blade surface, 12 - mounting end, 13 - water guide groove, 14 - water dripping hole, 15 - water pipe connector, 16 - limiting ring, 2 - electrode rod, 21 - cover plate, 22 - scale, 23 - water pipe mounting hole, 24 - indicating block, 3 - operating handle, 4 - water inlet pipe, 41 - branch water pipe, 5 - cable. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present utility model will be described in detail in conjunction with the attached Figures 1-8 drawings in the embodiments of the present utility model. Embodiment

[0029] As Figure 1 shown, a plasma needle electrode with puncture and water outlet functions includes a puncture needle 1, an electrode rod 2, an operating handle 3, a water inlet pipe 4 and a cable 5. One end of the electrode rod 2 is installed on the operating handle 3, and the other end is connected to the puncture needle 1. The water inlet pipe 4 for conveying physiological saline passes through the operating handle 3 and the electrode rod 2 and is connected to the puncture needle 1. One end of the cable 5 for providing power support for the plasma needle electrode is arranged in the operating handle 3, and the other end is connected to an external power supply.

[0030] The operating handle 3 is a streamlined L-shaped handle. The main function of the operating handle 3 is to facilitate the user's holding and operation. A small water pump is installed in the operating handle 3. The water inlet pipe 4 located outside the operating handle 3 is connected to one end interface of the water pump, and the water inlet pipe 4 located inside the electrode rod 2 is connected to the other end interface of the water pump. The external physiological saline can be pumped into the device through the water pump. At the same time, for the convenience of control, a knob for controlling the flow rate of physiological saline and a button for activating and exciting the plasma are also arranged on the operating handle 3.

[0031] The function of the cable 5 is to provide power support for the entire plasma needle electrode, facilitating the control of the input of physiological saline and the excitation of the plasma.

[0032] As Figure 1 、 2 、3 and 7 shown, the puncture needle 1 includes a puncture end and a mounting end 12. The main function of the puncture needle 1 is to provide the puncture function for the entire device. In addition, the puncture needle 1 is also used as an electrode for exciting the plasma. The main function of the puncture end is for puncturing, and the main function of the mounting end 2 is for connecting to the electrode rod 2.

[0033] The whole puncture needle 1 is made of metal that meets medical standards. In this embodiment, 304 stainless steel is preferably used. The whole puncture needle 1 is a cylindrical hollow tube. An internal thread is provided on the inner side surface of one end of the puncture needle 1. This end where the internal thread is provided is named the installation end 12. The puncture needle 1 is screwed onto the electrode rod 12 through this installation end 12.

[0034] To facilitate the puncture of the puncture needle 1, a puncture blade surface 11 is provided at the other end of the puncture needle 1 away from the installation end 12. The end where the puncture blade surface 11 is provided is named the puncture end. One end of the puncture blade surface 11 passes through the center of the end of the puncture needle 1, and the other end is connected to the cylindrical side surface of the puncture needle 1. There are three groups of puncture blade surfaces 11 provided on the puncture needle 1.

[0035] The areas of the three groups of puncture blade surfaces 11 are the same, and the three groups of puncture blade surfaces 11 are evenly distributed on the puncture needle 1, dividing the end of the puncture needle 1 away from the installation end 12 into a triangular pyramid shape. In addition, to facilitate puncture, the three edges of the triangular pyramid are polished and sharpened. At this time, the puncture end of the puncture needle 1 is in the shape of a triangular edge.

[0036] Such a setting can make the puncture easier, and at the same time the puncture wound surface is smaller, which is convenient for the patient's later recovery.

[0037] During the tissue ablation process, in order to improve the surgical efficiency and avoid the problem that the doctor needs to dip saline repeatedly during use, a water dripping hole 14 is provided on the puncture blade surface 11. The water dripping hole 14 penetrates the puncture blade surface 11. The main function of the water dripping hole 14 is to be connected to the water inlet pipe 4, and saline is continuously supplied to the tip of the puncture needle 1 through the water inlet pipe 4 and the water dripping hole 14, so that the saline can be excited when the tip works, generating plasma to ablate the patient's tissue.

[0038] In order to make the saline flowing out of the water dripping hole stably converge to the tip of the needle, so that the plasma can be stably excited, the water dripping hole 14 is designed in the shape of a water droplet, and the larger-sized end is closer to the tip of the puncture needle 1. In this way, the saline flowing out of the water dripping hole 14 will be more likely to converge to the tip of the puncture needle 1.

[0039] The water dripping hole 14 is provided on each puncture blade surface 11, and the position of each water dripping hole 14 on the puncture blade surface 11 is the same. Such a setting makes the saline flowing out of the three water dripping holes 14 evenly wrap the tip of the puncture needle 1 after converging to the tip of the needle, which can ensure the stable and uniform excitation of the plasma.

[0040] In addition, in order to facilitate the collection of the physiological saline flowing out of the water dripping hole 14 at the tip of the puncture needle 1, on the surface of the puncture blade surface 11, a water guiding groove 13 with a rectangular cross-section is recessed perpendicularly to the puncture blade surface 11. One end of the water guiding groove 13 is communicated with the water dripping hole 14, and the other end is connected with the tip of the puncture needle 1. The physiological saline flowing out of the water dripping hole 14 is guided by the water guiding groove 13 and collected at the tip of the puncture needle 1.

[0041] In order to improve the guiding effect of the water guiding groove 13 on the physiological saline, the depth of the water guiding groove 13 arranged on the puncture blade surface 11 is different. The depth of the end near the water dripping hole 14 is deeper, and the depth of the end near the tip of the puncture needle 1 is shallower.

[0042] The setting with a deeper depth at the end near the water dripping hole 14 enables the physiological saline flowing out of the water dripping hole 14 to easily enter the water guiding groove 13, facilitating the flow of the physiological saline along the water guiding groove 13.

[0043] The setting with a shallower depth at the end near the tip of the puncture needle 1 enables the physiological saline to flow to the end of the water guiding groove 13, near the tip of the puncture needle 1. Due to the smaller surface gradient between the bottom surface of the water guiding groove 13 and the surface of the puncture blade surface 11 at the tip, the physiological saline can flow out of the water guiding groove 13 very smoothly and stably collect at the tip of the puncture needle 1, improving the effect and stability of plasma excitation.

[0044] In order to facilitate the transmission of the physiological saline to the water dripping hole 14 of the puncture needle 1, inside the puncture needle 1, a "J"-shaped water pipe connector 15 is provided. The water pipe connector 15 is a "J"-shaped hollow pipe. The shorter end of the water pipe connector 15 is connected to the water dripping hole 14 on the puncture blade surface 11, and the longer end is connected to the branch water pipe 41 on the water inlet pipe 4.

[0045] The water pipe connector 15 and the puncture needle 1 are made of the same material, both made of 304 stainless steel. In addition, regarding the fixation of the water pipe connector 15 at the water dripping hole 14 on the puncture blade surface 11, they are fixed by welding between them, and the welding part will not leak water.

[0046] Three water pipe connectors 15 are provided on the puncture needle 1, and each water pipe connector 15 corresponds to the position of a water dripping hole 14 on a puncture blade surface 11.

[0047] After the branch water pipe 41 is connected to the water pipe connector 15, in order to limit the connection part, a ring-shaped limiting ring 16 protrudes perpendicularly to the outer wall at the end of the longer end of the "J"-shaped water pipe connector 15. At the same time, a stepped anti-slip platform (not shown in the figure) also protrudes on the outer wall of the water pipe connector 15 at this end. When the branch water pipe 41 is sleeved on the end of the water pipe connector 15, the inner side wall of the branch water pipe 41 contacts the anti-slip platform, and at the same time, the end of the branch water pipe 41 fits against the limiting ring 16. In addition, in order to prevent the branch water pipe 41 and the water pipe connector 15 from leaking at the connection part, sealant is coated on the inner side wall of the branch water pipe 41 and the end of the water pipe connector 15.

[0048] As Figure 4 、 5 、6, 7, and 8 show, the electrode rod 2 includes a rod body and a cover plate 21 provided at one end of the rod body.

[0049] The rod body is a hollow cylindrical tube as a whole, with both ends of the rod body open. The rod body is made of metal that meets medical standards. In this embodiment, it is preferably made of 304 stainless steel.

[0050] In order to facilitate the connection of the electrode rod 2 with the operating handle 3 and the puncture needle 1, a ring-shaped limiting platform is protrudingly provided on the outer side surface at one end of the rod body. Through this limiting platform, the electrode rod 2 can be stably clamped inside the operating handle 3 to ensure the stability of the connection between the operating handle 3 and the electrode rod 2.

[0051] On the end surface at the other end of the rod body, a ring-shaped mounting platform protrudes perpendicularly to the end surface. The inner diameter of the mounting platform is the same as the inner diameter of the rod body, and the outer diameter of the mounting platform is slightly smaller than the outer diameter of the rod body. External threads are provided on this mounting platform. Through these external threads, the rod body can be screwed together with the mounting end 12 on the puncture needle 1. And in order to ensure the smoothness of puncture, the outer diameter at the mounting end 12 is the same as the outer diameter of the rod body. After the puncture needle 1 and the electrode rod 2 are connected together, the outer sides of the two are smoothly transitioned, which can ensure the smoothness of puncture and at the same time prevent secondary harm to the patient caused by uneven transition.

[0052] The cover plate 21 is a plastic sheet with a circular cross-section. The cover plate 21 is made of materials that meet medical standards as a whole. In this embodiment, it is preferably made of PP plastic. The main function of the cover plate 21 is to isolate the inner cavity of the puncture needle 1 from the inner cavity of the electrode rod 2. At the same time, the cover plate 21 can also play a role in supporting the branch water pipe 41 in the water inlet pipe 4.

[0053] To ensure the sealing performance of the cover plate 21 at the end of the electrode rod 2, the cover plate 21 is designed in two sections, i.e., the cover plate 21 is stepped in the axial direction, and the outer diameters at both ends of the cover plate 21 are different. The outer diameter of the smaller end of the cover plate 21 is the same as the inner diameter of the electrode rod 2, and the outer diameter of the larger end of the cover plate 21 is the same as the outer diameter of the electrode rod 2. In this way, when the cover plate 21 is inserted into the end of the electrode rod 2, the smaller-diameter end of the cover plate 21 is inserted into the cavity of the electrode rod 2, and the larger-diameter end of the cover plate 21 is located outside the electrode rod 2 to seal the electrode rod 2. Additionally, to improve the sealing performance, a sealing glue is also coated at the connection between the cover plate 21 and the electrode rod 2, further enhancing the sealing effect.

[0054] To facilitate the support of the branch water pipe 41 in the water inlet pipe 4 by the cover plate 21, three circular water pipe installation holes 23 are opened on the surface of the cover plate 21. The branch water pipe 41 can pass through the water pipe installation holes 23 and be connected to the water pipe connector 15 inside the puncture needle 1. At the same time, to ensure the sealing performance, after the branch water pipe 41 passes through the water pipe installation holes 23, a sealing glue is also coated at the contact between the water pipe installation holes 23 and the branch water pipe 41.

[0055] In addition, to ensure the normal use of the device, a functional hole is also opened on the cover plate 21. The cable 5 can pass through the functional hole and be connected to the puncture needle 1, enabling the puncture needle 1 to stimulate the physiological saline at the tip of the needle and ensuring the normal excitation of the plasma. At the same time, to ensure the sealing effect, a sealing glue is coated at the contact between the cable 5 and the functional hole.

[0056] To facilitate the operator to understand the puncture depth, a scale 22 is also provided on the outer side wall of the electrode rod 2, and the scale 22 is evenly opened along the length direction of the electrode rod 2.

[0057] The scale 22 can be set on the electrode rod 2 by means of electro-etching. To facilitate identification, a color different from the natural color of the electrode rod 2 is also coated on the etched scale 22, and the depth of the coated color progresses with the length of the electrode rod 2, i.e., the color representing a deeper insertion is darker than the color representing a shallower depth.

[0058] An indicating block 24 is also sleeved outside the electrode rod 2. The indicating block 24 is a cylindrical sleeve made of plastic, and the color of the indicating block 24 is prominent orange. The whole indicating block 24 is made of materials meeting medical standards. In this embodiment, PP plastic is preferably used. The inner diameter of the indicating block 24 is slightly larger than the outer diameter of the electrode rod 2. The indicating block 24 can be sleeved outside the electrode rod 2 and can move on the electrode rod 2. By cooperating with the scale 22 on the electrode rod 2, the indicating block 24 can assist in indicating the puncture depth.

[0059] Before puncture, the indicator block 24 is located at one end of the electrode rod 2 close to the puncture needle 1. During puncture, the indicator block 24 moves on the electrode rod 2 as the puncture depth changes. The puncture depth can be understood by checking the scale corresponding to the end of the indicator block 24, which is convenient to use.

[0060] like Figure 1 , 7 As shown in FIG. 8 , a branch water pipe 41 is provided at one end of the water inlet pipe 4 , and the water inlet pipe 4 is used to provide physiological saline for exciting plasma to the entire device.

[0061] The water inlet pipe 4 is a flexible silicone tube as a whole. Three branch water pipes 41 are arranged at one end of the water inlet pipe 4. The diameter of the branch water pipe 41 is slightly smaller than the size of the water inlet pipe 4. One end of the water inlet pipe 4 is connected to the water pump arranged in the operating handle 3, and the three branch water pipes 41 at the other end pass through the cover plate 21 and are connected to the water pipe connector 15 in the puncture needle 1, so as to automatically supply physiological saline to the puncture needle 1, thereby avoiding the operator from frequently dipping in physiological saline during use.

[0062] The assembly method of this embodiment is as follows: during assembly, the water inlet pipe 4 is first connected to the water pump, and then the water pump and the cable 5 are installed in the operating handle 3 (this installation method is the prior art), and then the other end of the water inlet pipe 4 and the cable 5 are passed through the electrode rod 2. After the water inlet pipe 4 passes through the electrode rod 2, the three branch water pipes 41 at the end of the water inlet pipe 4 and the cable 5 are passed through the cover plate 21. After the three branch water pipes 41 pass through the cover plate 21, they are connected to the water pipe connector 15 in the puncture needle 1, and then sealing glue (preferably sealing silicone) is applied on the cover plate 21, and then the cover plate 21 is placed on the end of the electrode rod 2 before the glue solidifies, and then the puncture needle 1 is screwed onto the electrode rod 2. At this time, since the glue on the cover plate 21 has not solidified, the branch water pipe 41 connected to the puncture needle 1 will not be twisted during screwing, and then the electrode rod 2 is installed in the operating handle 3, and the assembly is completed.

[0063] The use process of this embodiment is as follows: when in use, first use the puncture needle 1 to percutaneously puncture into the tissue near the farthest edge under the guidance of ultrasound or laryngoscope, and then turn on the water pump by using the control button on the operating handle 3. At this time, physiological saline is automatically supplied to the needle tip of the puncture needle 1, and then the plasma can be excited by the physiological saline to ablate the tissue. The plasma needle electrode in this embodiment has the puncture function itself and can be used to perform puncture directly. During the operation, no puncture instrument is required, and the operation is more convenient. In addition, the plasma needle electrode in this embodiment also has the function of automatically supplying physiological saline. When in use, the physiological saline drip hole provided on the puncture blade surface is used to automatically supply physiological saline, and the doctor does not need to repeatedly dip in physiological saline. It is easy to use and reduces the operation time.

[0064] The above embodiments are only used to illustrate the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the present utility model.

Claims

1. A plasma needle electrode with puncture and water discharge functions, comprising an operating handle (3) and a cable (5), wherein one end of the cable (5) for providing power support for the plasma needle electrode is arranged in the operating handle (3), and the other end is connected to an external power supply, characterized in that: The invention also comprises a puncture needle (1), an electrode rod (2) and a water inlet pipe (4); one end of the electrode rod (2) is arranged on the operating handle (3), and the other end is connected to the puncture needle (1); the puncture needle (1) comprises a puncture blade surface (11) and a water dripping hole (14) arranged on the puncture blade surface (11); the water inlet pipe (4) for supplying physiological saline passes through the operating handle (3) and the electrode rod (2) and is connected to the water dripping hole (14) on the puncture blade surface (11); the physiological saline transmitted by the water inlet pipe (4) flows to the tip of the puncture needle (1) through the water dripping hole (14).

2. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: Three puncture blade surfaces (11) are arranged on the puncture needle (1), and the three puncture blade surfaces (11) are evenly distributed on the puncture needle (1).

3. The plasma needle electrode with puncture and water discharge functions according to claim 2, characterized in that: A water guide groove (13) is provided on the surface of the puncture blade surface (11), the water guide groove (13) connecting the water drip hole (14) and the tip of the puncture needle (1), and the depth of one end of the water guide groove (13) close to the water drip hole (14) is greater than the depth of the other end.

4. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: The drip hole (14) is in the shape of a water drop, and the end of the drip hole (14) with a larger size is close to the tip of the puncture needle (1).

5. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: A water pipe connector (15) connected to the drip hole (14) is provided inside the puncture needle (1), and the water inlet pipe (4) is connected to the drip hole (14) via the water pipe connector (15).

6. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: Three branch water pipes (41) are provided at one end of the water inlet pipe (4), and the three branch water pipes (41) are respectively connected to the water pipe connector (15) in the puncture needle (1).

7. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: A cover plate (21) is provided at the connection end between the electrode rod (2) and the puncture needle (1), and a branch water pipe (41) in the water inlet pipe (4) passes through the cover plate (21) and is connected to the water pipe connector (15).

8. The plasma needle electrode with puncture and water discharge functions according to claim 1, characterized in that: A scale (22) is provided on the surface of the electrode rod (2) along the extension direction of the electrode rod (2), and a slidable indicator block (24) is sleeved on the electrode rod (2), wherein the indicator block (24) cooperates with the scale (22) to indicate the puncture depth of the electrode rod (2).

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