Sharp plasma operation electrode capable of being injected with liquid

Abstract

The utility model discloses a sharp type plasma operation electrode capable of being injected with liquid, and relates to the technical field of medical instruments, the sharp type plasma operation electrode capable of being injected with liquid comprises a handle, a cutter bar assembly and a cutter head, the cutter bar assembly is installed on the handle, and a liquid injection channel is formed in the cutter bar assembly; the tool bit is arranged at the end, away from the handle, of the tool bar assembly and provided with a cutting sharp part, and the cross sectional area of the cutting sharp part is gradually decreased from the end close to the tool bar assembly to the end away from the tool bar assembly. A liquid outlet and a blade are arranged on the outer wall of the cutting sharp part, the liquid outlet communicates with the liquid injection channel, and the blade extends in the length direction of the cutting sharp part. According to the technical scheme provided by the utility model, the problem that the working surface of the existing tool bit is generally planar and is not favorable for cutting focus tissues is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a sharp plasma surgical electrode capable of being injected with liquid. Background Art

[0002] Plasma cutting technology is widely used in soft tissue surgical procedures due to its advantages, such as minimal thermal damage and effective hemostasis. However, existing plasma cutting instruments, when treating lesions, suffer from large wound areas and inconvenient operation, limiting their clinical application.

[0003] Most existing plasma cutter heads have a planar structure. When cutting the soft tissue in the lesion area, it is difficult to accurately locate and treat the lesion area, resulting in a large area of ​​trauma and severe thermal damage to the surrounding tissues, affecting the subsequent healing speed. In severe cases, a series of complications will occur after the operation, such as infection and bleeding. Utility Model Content

[0004] The main purpose of the utility model is to provide a sharp plasma surgical electrode that can be injected with liquid, aiming to solve the problem that the working surface of the existing blade is usually flat and not conducive to cutting lesion tissue.

[0005] To achieve the above-mentioned purpose, the present invention provides a liquid-injectable sharp plasma surgical electrode, which comprises:

[0006] handle;

[0007] A knife bar assembly is mounted on the handle, and a liquid injection channel is formed inside the knife bar assembly; and

[0008] The blade head is arranged at the end of the blade rod assembly away from the handle, and the blade head is provided with a sharp cutting portion, and the cross-sectional area of ​​the sharp cutting portion gradually decreases from the end close to the blade rod assembly to the end away from the blade rod assembly; the outer wall of the sharp cutting portion is provided with a liquid outlet and a blade, the liquid outlet is connected to the injection channel, and the blade is extended along the length direction of the sharp cutting portion.

[0009] In one embodiment, the outer wall of the cutting head is provided with adjacent first and second inclined surfaces, the first and second inclined surfaces are both inclined relative to the axial direction of the cutting head, and the liquid outlet is provided on the first and second inclined surfaces, and the intersection of the first and second inclined surfaces forms the cutting edge.

[0010] In one embodiment, the cutting head is further provided with a curved surface, the two sides of which intersect with the first inclined surface and the second inclined surface respectively, and the curved surface, the first inclined surface and the second inclined surface converge at a point at an end of the cutting head away from the tool rod assembly to form a cutting tip.

[0011] In one embodiment, the injection channel includes:

[0012] a main channel running through the interior of the knife bar assembly, with one end of the main channel extending to the interior of the handle and the other end of the main channel extending to the interior of the knife head; and

[0013] The branch channel is communicated with the main channel. Two branch channels are provided, and the two branch channels are respectively communicated with the liquid outlet on the first inclined surface and the liquid outlet on the second inclined surface.

[0014] In one embodiment, the knife bar assembly comprises:

[0015] an outer electrode tube, mounted on the handle;

[0016] an inner electrode tube installed inside the outer electrode tube, the blade head being provided at one end of the inner electrode tube away from the handle, and the injection channel being provided inside the inner electrode tube; and

[0017] The first insulating layer is provided between the outer electrode tube and the inner electrode tube to isolate the electrode tube from the inner electrode tube.

[0018] In one embodiment, the inner electrode tube has a mounting end exposed outside the first insulating layer, the mounting end is bent and extended in a direction deviating from the axial direction of the inner electrode tube, and the cutter head is obliquely arranged at the mounting end.

[0019] In one embodiment, the liquid-injectable sharp plasma surgical electrode further includes a second insulating layer, which is sleeved on the outside of the outer electrode tube, and the outer electrode tube has a conductive segment exposed outside the second insulating layer.

[0020] In one embodiment, a gap is defined between an outer wall of the first insulating layer and an inner wall of the outer electrode tube.

[0021] In one embodiment, the liquid-injectable sharp plasma surgical electrode further includes a cable assembly, which is electrically connected to the knife rod assembly through the handle, and one end of the cable assembly is connected to the inner electrode tube, and the other end of the cable assembly is connected to the outer electrode tube.

[0022] In one embodiment, the liquid-injectable sharp plasma surgical electrode further includes an injection tube, which is mounted on the handle and communicates with the injection channel through the handle.

[0023] In the technical solution of the present utility model, by providing an injection channel inside the blade assembly and providing a liquid outlet connected to the injection channel on the blade head, the conductive medium in the injection channel can flow out through the liquid outlet, so that the area where the blade head contacts the lesion tissue is in a conductive medium environment; by applying voltage to the blade head, plasma can be generated, and the covalent bond between the plasma and the cell molecules is utilized to achieve the effects of cutting, ablation and hemostasis of the soft tissue in the lesion area. In this solution, a cutting sharp portion is provided on the blade head. The design of this sharp structure allows the blade head to easily pierce or penetrate the soft tissue in the lesion area, making the blade head sharper during cutting, improving cutting efficiency, and reducing damage to surrounding normal tissues. In addition, the design of the liquid outlet on the cutting sharp portion integrates both the cutting function and the injection function on the cutting sharp portion. During surgery, there is no need to introduce an additional external injection tube. It can be operated with one hand, which improves the convenience of the surgery. In addition, by cutting the lesion tissue with the blade provided on the outer wall of the sharp cutting part, the electrode can cut the soft tissue more accurately and quickly, reducing the thermal damage to the surrounding tissue and improving the efficiency of the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a schematic structural diagram of the blade rod assembly and the blade head portion of an embodiment of a liquid-injectable sharp plasma surgical electrode provided by the present invention;

[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0027] Figure 3 A structural cross-sectional view of a cutter bar assembly and a cutter head portion of another embodiment of the liquid-injectable sharp plasma surgical electrode provided by the present invention;

[0028] Figure 4 A schematic structural diagram of another embodiment of the liquid-injectable sharp plasma surgical electrode provided by the present invention;

[0029] Figure 5This is a partial structural diagram of another embodiment of the liquid-injectable sharp plasma surgical electrode provided by the present invention.

[0030] Description of Figure Numbers:

[0031] 100. Liquid-injectable sharp plasma surgical electrode; 1. Handle; 2. Blade assembly; 21. Outer electrode tube; 22. Inner electrode tube; 220. Mounting end; 221. Liquid injection channel; 2211. Main channel; 2212. Branch channel; 23. First insulating layer; 24. Second insulating layer; 3. Blade; 31. Cutting point; 310. Liquid outlet; 311. Blade; 312. First bevel; 313. Second bevel; 4. Cable assembly; 5. Liquid injection tube.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] Most existing plasma cutter heads have a planar structure. When cutting the soft tissue in the lesion area, it is difficult to accurately locate and treat the lesion area, resulting in a large area of ​​trauma and severe thermal damage to the surrounding tissues, affecting the subsequent healing speed. In severe cases, a series of complications will occur after the operation, such as infection and bleeding.

[0037] Based on this, the utility model proposes a sharp plasma surgical electrode that can be injected with liquid.

[0038] See also Figure 1 、 Figure 2 and Figure 5 In one embodiment of the present invention, the liquid-injectable sharp plasma surgical electrode 100 comprises:

[0039] Handle 1;

[0040] The blade rod assembly 2 is mounted on the handle 1, and a liquid injection channel 221 is formed inside the blade rod assembly 2; and

[0041] The cutter head 3 is arranged at the end of the cutter bar assembly 2 away from the handle 1. The cutter head 3 is provided with a sharp cutting portion 31, and the cross-sectional area of ​​the sharp cutting portion 31 gradually decreases from the end close to the cutter bar assembly 2 to the end away from the cutter bar assembly 2; the outer wall of the sharp cutting portion 31 is provided with a liquid outlet 310 and a blade 311, the liquid outlet 310 is connected to the injection channel 221, and the blade 311 is extended along the length direction of the sharp cutting portion 31.

[0042] In the technical solution of the present invention, by providing an injection channel 221 inside the blade assembly 2 and providing a liquid outlet 310 connected to the injection channel 221 on the blade head 3, the conductive medium in the injection channel 221 can flow out through the liquid outlet 310, so that the area where the blade head 3 contacts the lesion tissue is in a conductive medium environment; by applying voltage to the blade head 3, plasma can be generated, and the covalent bond between the plasma and the cell molecules is utilized to achieve the effects of cutting, ablation and hemostasis of the soft tissue in the lesion area. In this solution, a cutting sharp portion 31 is provided on the blade head 3. The design of this sharp structure allows the blade head 3 to easily pierce or penetrate the soft tissue in the lesion area, making the blade head 3 sharper and more focused during cutting, improving cutting efficiency, and reducing damage to surrounding normal tissue. In addition, the design of the liquid outlet 310 on the cutting sharp portion 31 integrates both the cutting function and the injection function on the cutting sharp portion 31. During surgery, there is no need to introduce an additional external injection tube, and the operation can be performed with one hand, which improves the convenience of the surgery. In addition, by cutting the lesion tissue with the blade 311 provided on the outer wall of the sharp cutting portion 31, the electrode can cut the soft tissue more accurately and quickly, reducing thermal damage to the surrounding tissue and improving the efficiency of the surgical operation.

[0043] Specifically, there is no specific limitation on the structure of the cutting tip 31. For example, it can be lancet-shaped or pyramid-shaped, as long as it has a pointed tip and can pierce soft tissue. In addition, there is no specific limitation on the number of blades 311. It can be selected and set according to actual needs. A plurality of blades 311 can be provided at intervals on the outer wall of the cutting tip 31, and the blades 311 are extended along the length direction of the cutting tip 31, so as to meet the needs of rotary cutting. It should be noted that since the arbor assembly 2 is usually a long and thin structure, in order to prevent bending during the operation, the handle 1 is configured in an inner shell and an outer shell. The internal space of the outer shell is larger and is used to install other necessary component structures. The inner shell is respectively installed at both ends of the outer shell and extends outward, thereby providing more support for the arbor assembly 2 and improving the stability of the arbor assembly 2.

[0044] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 The outer wall of the cutting head 3 is provided with adjacent first and second inclined surfaces 312, 313. The first and second inclined surfaces 312, 313 are both inclined relative to the axial direction of the cutting head 3, and a liquid outlet 310 is provided on the first and second inclined surfaces 312, 313. The intersection of the first and second inclined surfaces 312, 313 forms a blade 311. This blade 311 structure makes it smoother for the cutting head 3 to cut tissue, reduces cutting resistance, and improves cutting efficiency. Moreover, the inclined setting of the first and second inclined surfaces 312, 313 enables the cutting head 3 to cut tissue along a predetermined path, thereby improving the accuracy and controllability of the cutting. In addition, the liquid outlet 310 is provided on both inclined surfaces, so that the conductive medium can directly act on the cutting area, ensuring that the conductive medium is evenly distributed during the cutting process, thereby improving the uniformity and stability of plasma generation, and further optimizing the cutting and hemostasis effects.

[0045] In the embodiments of the present invention, please refer to Figure 2 The blade head 3 is also provided with an arc surface, and the two sides of the arc surface intersect with the first bevel 312 and the second bevel 313 respectively, so that the arc surface, the first bevel 312 and the second bevel 313 converge at one point at the end of the blade head 3 away from the blade rod assembly 2 to form a blade tip. The setting of the arc surface forms the structure of the cutting sharp portion 31 on the blade head 3. This sharp structure of the blade tip is conducive to the energy gathering of plasma, so that the force required to puncture the lesion tissue is smaller, thereby reducing damage to the surrounding healthy tissue and facilitating the patient's postoperative recovery. In addition, the precise puncturing ability of the blade tip enables the surgeon to quickly enter the lesion area, shortening the operation time and improving the efficiency of the operation. It should be pointed out that the blade tip can not only be used for puncturing lesion tissue, but also for fine cutting of lesion tissue.

[0046] In the embodiments of the present invention, please refer to Figure 2 , the injection channel 221 includes:

[0047] The main channel 2211 runs through the interior of the blade assembly 2, and one end of the main channel 2211 extends to the interior of the handle 1, and the other end of the main channel 2211 extends to the interior of the blade head 3; and

[0048] The branch channel 2212 is in communication with the main channel 2211 . There are two branch channels 2212 , and the two branch channels 2212 are in communication with the liquid outlet 310 on the first inclined surface 312 and the liquid outlet 310 on the second inclined surface 313 , respectively.

[0049] Specifically, by dividing the injection channel 221 into a main channel 2211 and a branch channel 2212, it is ensured that the conductive medium can be accurately transported from the handle 1 to the interior of the blade head 3, providing a stable medium source for the generation of plasma. The two branch channels 2212 are respectively connected to the liquid outlet 310 on the first inclined surface 312 and the second inclined surface 313, which can ensure that the conductive medium is evenly distributed on the two inclined surfaces of the blade head 3, so that the conductive medium can flow directly to the cutting area, thereby generating a uniform plasma field during cutting, improving the cutting and hemostasis effects. It should be noted that there is no specific limitation on the aperture of the branch channel 2212 and the main channel 2211, and they can be adjusted according to the demand for the conductive medium during the actual operation.

[0050] In the embodiments of the present invention, please refer to Figure 3 , the tool bar assembly 2 includes:

[0051] The outer electrode tube 21 is mounted on the handle 1;

[0052] The inner electrode tube 22 is installed inside the outer electrode tube 21. The end of the inner electrode tube 22 away from the handle 1 is provided with a blade head 3, and the injection channel 221 is provided inside the inner electrode tube 22; and

[0053] The first insulating layer 23 is provided between the outer electrode tube 21 and the inner electrode tube 22 to isolate the outer electrode tube from the inner electrode tube 22 .

[0054] Specifically, in an environment formed by a conductive medium, to ensure that plasma can be generated through the medium when voltage is applied to the inner electrode tube 22 and the outer electrode tube 21, a first insulating layer 23 is provided between the inner electrode tube 21 and the outer electrode tube 22. The provision of the first insulating layer 23 prevents electrical contact between the inner electrode tube 22 and the outer electrode tube 21, ensuring electrical insulation between the two electrode tubes, thereby forming a current circuit. It should be noted that the cutter head 3, the inner electrode tube 22, and the outer electrode tube 21 are all made of a conductive material, such as metal; while the first insulating layer 23 is made of an electrically insulating material, such as rubber or plastic. Optionally, the first insulating layer 23 can be a coating applied to the outer surface of the inner electrode tube 22, or an insulating sleeve placed between the outer electrode tube 22 and the outer electrode tube 21; any component that can electrically insulate the inner electrode tube 22 and the outer electrode tube 21 is acceptable.

[0055] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 The inner electrode tube 22 has a mounting end 220 exposed outside the first insulating layer 23, and the mounting end 220 is bent and extended in an axial direction deviating from the inner electrode tube 22, and the blade head 3 is tilted at the mounting end 220. The mounting end 220 of the inner electrode tube 22 is bent and extended, so that the blade head 3 is tilted. This hook-shaped design allows doctors to more easily reach and operate hard-to-reach areas, such as deep or tricky lesions. In addition, the curved setting of the mounting end 220 provides a more flexible cutting angle. The doctor can adjust the position and angle of the blade head 3 according to the needs of the operation to achieve a more precise and flexible cutting operation. Optionally, the blade head 3 is detachably mounted at the mounting end 220, such as by threaded connection or snap-on connection, to facilitate the replacement and maintenance of the blade head 3.

[0056] In the embodiments of the present invention, please refer to Figure 3 The liquid-injectable sharp plasma surgical electrode 100 also includes a second insulating layer 24, which is sleeved on the outside of the outer electrode tube 21, and the outer electrode tube 21 has a conductive segment exposed on the outside of the second insulating layer 24. The second insulating layer 24 is sleeved on the outside of the outer electrode tube 21, and its main function is to provide electrical insulation to prevent the current from accidentally flowing to other parts of the patient's body during the operation, thereby ensuring the safety of the operation. The second insulating layer 24 can be made of a high-temperature resistant and biocompatible material, such as Teflon or other medical-grade plastics. Moreover, at one end close to the cutting head 3, the length of the second insulating layer 24 is less than the length of the outer electrode tube 21, so that the outer electrode tube 21 is partially exposed on the outside of the second insulating layer 24 to form a conductive segment, thereby forming a loop current with the inner electrode tube 22.

[0057] In the embodiments of the present invention, please refer to Figure 3A gap exists between the outer wall of the first insulating layer 23 and the inner wall of the outer electrode tube 21. This means that the outer diameter of the first insulating layer 23 is smaller than the inner diameter of the outer electrode tube 21. This allows the first insulating layer 23 and the inner electrode tube 22 to be easily installed together within the outer electrode tube 21, simplifying the assembly process and facilitating subsequent maintenance and replacement. Furthermore, this gap allows the first insulating layer 23 and the inner electrode tube 22 to move freely during installation, preventing damage to the outer electrode tube 21 caused by the first insulating layer 23 during installation and reducing the risk of short circuits between electrodes. It also helps absorb vibration and shock during surgical operations, enhancing the stability of the overall structure.

[0058] In the embodiments of the present invention, please refer to Figure 4 and Figure 5 To provide the cutting head 3 with the electrical energy required for the surgical procedure, thereby generating plasma at the cutting head 3, the liquid-injectable sharp plasma surgical electrode 100 further includes a cable assembly 4. The cable assembly 4 is electrically connected to the cutting rod assembly 2 via the handle 1, with one end of the cable assembly 4 connected to the inner electrode tube 22 and the other end of the cable assembly 4 connected to the outer electrode tube 21. At least two cable assemblies 4 are provided, each for outputting positive and negative currents, respectively. One end of each cable assembly 4 is electrically connected to the inner electrode tube 22 and the outer electrode tube 21, respectively, and the other end of each cable assembly 4 is connected to an external plasma generator, responsible for transmitting high-frequency voltage from the plasma generator to the cutting head 3.

[0059] In the embodiments of the present invention, please refer to Figure 4 and Figure 5 In order to supply a conductive medium into the injection channel 221, the injectable sharp plasma surgical electrode 100 further includes an injection tube 5, which is mounted on the handle 1 and communicates with the injection channel 221 through the handle 1. Thus, a conductive medium such as physiological saline can be injected into the injection channel 221 from the injection tube 5, and then flows out from the liquid outlet 310 to the cutting head 3, thereby providing the cutting head 3 with the environmental conditions required for plasma generation. Furthermore, to facilitate control of the flow rate of the solution in the injection channel 221, a flow control valve is provided on the injection tube 5. The flow control valve is located on the outside of the injection tube 5 and can control the flow rate within the injection channel 221 by changing the degree of flattening of the injection tube 5, thereby changing the flow rate within the injection channel 221.

[0060] Alternatively, as Figure 4As shown, in another embodiment of the present invention, in order to facilitate the connection between the external conductive medium supply device and the injection tube 5, the injection tube 5 can also be provided with a Luer adapter, and the Luer adapter is provided at the end of the injection tube 5 away from the knife rod assembly 2. The setting of the Luer adapter can better connect the injection tube 5 with the conductive medium supply device, ensure the stability of the joint between the two, and prevent water leakage caused by poor connection.

[0061] The present invention also proposes a plasma surgical device, which includes a liquid-injectable sharp plasma surgical electrode 100 and a plasma generator connected to the liquid-injectable sharp plasma surgical electrode 100. For example, the liquid-injectable sharp plasma surgical electrode 100 can be electrically connected to the plasma generator through a cable assembly 4, and the plasma generator is responsible for providing a high-frequency voltage to the surgical electrode. When voltage is applied to the electrode, an air sheath is formed at the electrode site. When the sheath is broken down, plasma is generated. The plasma obtains energy in the electric field to achieve effects such as cutting, hemostasis, and coagulation. The specific structure of the liquid-injectable sharp plasma surgical electrode 100 refers to the above-mentioned embodiment. Since the present plasma surgical device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0062] To enhance surgical safety, plasma surgical equipment can also be equipped with auxiliary devices such as temperature sensors, pressure sensors, and flow controllers. Temperature sensors monitor electrode temperature in real time to prevent tissue damage from overheating; pressure sensors detect pressure between the electrode and tissue to ensure surgical stability; and flow controllers adjust the injection flow rate to optimize surgical outcomes.

[0063] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A liquid-injectable sharp plasma surgical electrode, characterized in that: include: handle; A knife bar assembly is mounted on the handle, and a liquid injection channel is formed inside the knife bar assembly; and The blade head is arranged at the end of the blade rod assembly away from the handle, and the blade head is provided with a sharp cutting portion, and the cross-sectional area of ​​the sharp cutting portion gradually decreases from the end close to the blade rod assembly to the end away from the blade rod assembly; the outer wall of the sharp cutting portion is provided with a liquid outlet and a blade, the liquid outlet is connected to the injection channel, and the blade is extended along the length direction of the sharp cutting portion.

2. The liquid-injectable sharp plasma surgical electrode according to claim 1, characterized in that: The outer wall of the cutting head is provided with adjacent first and second inclined surfaces, and the first and second inclined surfaces are both inclined relative to the axial direction of the cutting head, and the liquid outlet is provided on the first and second inclined surfaces, and the intersection of the first and second inclined surfaces forms the cutting edge.

3. The liquid-injectable sharp plasma surgical electrode according to claim 2, characterized in that: The cutter head is further provided with an arc surface, the two sides of which intersect with the first bevel and the second bevel respectively, and the arc surface, the first bevel and the second bevel converge at one point at an end of the cutter head away from the tool rod assembly to form a cutting tip.

4. The liquid-injectable sharp plasma surgical electrode according to claim 2, characterized in that: The injection channel comprises: a main channel running through the interior of the knife bar assembly, with one end of the main channel extending to the interior of the handle and the other end of the main channel extending to the interior of the knife head; and The branch channel is communicated with the main channel. Two branch channels are provided, and the two branch channels are respectively communicated with the liquid outlet on the first inclined surface and the liquid outlet on the second inclined surface.

5. The liquid-injectable sharp plasma surgical electrode according to claim 1, characterized in that: The knife bar assembly comprises: an outer electrode tube, mounted on the handle; an inner electrode tube installed inside the outer electrode tube, the blade head being provided at one end of the inner electrode tube away from the handle, and the injection channel being provided inside the inner electrode tube; and The first insulating layer is provided between the outer electrode tube and the inner electrode tube to isolate the electrode tube from the inner electrode tube.

6. The liquid-injectable sharp plasma surgical electrode according to claim 5, characterized in that: The inner electrode tube has a mounting end exposed outside the first insulating layer. The mounting end is bent and extended in a direction deviating from the axial direction of the inner electrode tube, and the cutter head is obliquely arranged at the mounting end.

7. The liquid-injectable sharp plasma surgical electrode according to claim 5, characterized in that: The liquid-injectable sharp plasma surgical electrode further includes a second insulating layer, which is sleeved on the outside of the outer electrode tube, and the outer electrode tube has a conductive segment exposed outside the second insulating layer.

8. The liquid-injectable sharp plasma surgical electrode according to any one of claims 5 to 7, characterized in that: There is a gap between the outer wall of the first insulating layer and the inner wall of the outer electrode tube.

9. The liquid-injectable sharp plasma surgical electrode according to any one of claims 5 to 7, characterized in that: The liquid-injectable sharp plasma surgical electrode also includes a cable assembly, which is electrically connected to the knife rod assembly through the handle, and one end of the cable assembly is connected to the inner electrode tube, and the other end of the cable assembly is connected to the outer electrode tube.

10. The liquid-injectable sharp plasma surgical electrode according to any one of claims 1 to 7, characterized in that: The liquid-injectable sharp plasma surgical electrode further includes an injection tube, which is mounted on the handle and communicates with the injection channel through the handle.

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