Plasma operation electrode and plasma operation equipment capable of preventing discharged liquid from being jetted

Abstract

The utility model discloses a plasma operation electrode and plasma operation equipment capable of preventing discharged liquid from being jetted. The plasma operation electrode comprises a handle, the cutter bar is connected with the handle, and a liquid injection channel is formed in the cutter bar; the tool bit is fixedly connected to the end, away from the handle, of the tool bar, the liquid injection channel extends into the tool bit, a liquid outlet hole communicated with the liquid injection channel is formed in the tool bit, and the tool bit is provided with a working face deviating from the tool bar; the flow slowing part is arranged in the liquid injection channel in a supported mode and is close to the liquid outlet hole, and liquid in the liquid injection channel flows slowly through the flow slowing part, then flows out of the liquid outlet hole and flows to the working face along the outer wall of the tool bit. The utility model provides a plasma operation electrode capable of preventing discharged liquid from being jetted. The plasma operation electrode solves the problem that liquid in an existing liquid injection channel cannot accurately reach the working face of a tool bit.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a plasma surgical electrode and plasma surgical equipment capable of preventing liquid from spraying out. Background Art

[0002] Low-temperature plasma ablation refers to a surgery that achieves functions such as cutting, ablation and hemostasis of tissues under low-temperature conditions (40-70°C), and is increasingly widely used in clinical practice.

[0003] Plasma surgical electrodes usually include a handle, a knife rod, a knife head, a cable, a water injection pipeline, and a suction pipeline, among which the water injection pipeline is used to inject a conductive medium such as saline into the knife head, and the suction pipeline is used to suck out blood or residual tissue. When the flow of saline in the water injection pipeline is large, the saline may even spray out from the water outlet in a jet-like shape in a direction away from the knife head, preventing it from reaching the working surface on the knife head. This is not conducive to the generation of plasma on the working surface, nor is it conducive to cooling the soft tissue during surgery, affecting surgical efficiency and thermal damage. It is not friendly to doctors and patients, and unexpected thermal damage will affect the patient's postoperative recovery. Utility Model Content

[0004] The main purpose of the utility model is to provide a plasma surgical electrode and a plasma surgical device which can prevent liquid from spraying out, aiming to solve the problem that the liquid in the existing injection channel cannot accurately reach the working surface of the cutter head.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a plasma surgical electrode for preventing liquid spraying, comprising:

[0006] handle;

[0007] A knife rod connected to the handle, wherein a liquid injection channel is formed inside the knife rod;

[0008] A cutter head is fixedly connected to an end of the cutter bar away from the handle, the injection channel extends to the interior of the cutter head, the cutter head is provided with a liquid outlet hole connected to the injection channel, and the cutter head has a working surface away from the cutter bar; and

[0009] A flow-slowing member is supported and arranged inside the injection channel and close to the liquid outlet. The liquid in the injection channel flows slowly through the flow-slowing member and then flows out of the liquid outlet and along the outer wall of the cutter head to the working surface.

[0010] Optionally, in an embodiment of the utility model, the flow-delaying member is arranged on a side of the liquid outlet close to the knife rod; or, the flow-delaying member is arranged on a side of the liquid outlet far from the knife rod.

[0011] Optionally, in an embodiment of the present invention, the flow-reducing member is welded or bonded to the inner wall of the injection channel.

[0012] Optionally, in an embodiment of the present invention, the flow-delaying member is arranged in an I-shape or the flow-delaying member is arranged in a cubic structure.

[0013] Optionally, in one embodiment of the utility model, the liquid outlet has a first hole edge arranged on the inner wall of the cutter head and a second hole edge arranged on the outer wall of the cutter head, the first hole edge and the second hole edge are staggered, and the first hole edge is arranged close to the cutter rod, and the second hole edge is arranged away from the cutter rod.

[0014] Optionally, in an embodiment of the utility model, the plasma surgical electrode for preventing liquid spraying further includes an injection tube, wherein the injection tube is connected to the handle and communicates with the injection channel through the handle.

[0015] Optionally, in an embodiment of the present invention, a flow control valve is provided on the injection tube, and the flow control valve is used to control the flow of liquid in the injection tube.

[0016] Optionally, in an embodiment of the utility model, a Luer adapter is provided on the injection tube, and the Luer adapter is arranged at an end of the injection tube away from the knife rod.

[0017] Optionally, in an embodiment of the utility model, the plasma surgical electrode for preventing liquid spraying further includes a cable assembly, and the cable assembly is connected to the knife head via the handle and the knife rod.

[0018] Optionally, in an embodiment of the utility model, the cutter head includes:

[0019] An electrode tube, connected to one end of the knife rod away from the handle, the electrode tube is communicated with the injection channel and is provided with the liquid outlet;

[0020] A fixing member, fixedly arranged on a side of the electrode tube away from the knife rod, the fixing member forming the working surface; and

[0021] The electrode wire is fixedly arranged on the working surface of the fixing member.

[0022] Optionally, in one embodiment of the utility model, a suction port is provided on the fixing member, and a suction channel is also provided inside the knife rod, the suction channel extends to the interior of the knife head and is connected with the suction port; the plasma surgical electrode for preventing liquid spraying also includes a suction tube, the suction tube is connected to the handle, and is connected with the suction channel through the handle.

[0023] To achieve the above objectives, the utility model also proposes a plasma surgical device, which includes a plasma surgical electrode for preventing liquid spraying and a plasma generator as described in any of the above technical solutions, and the plasma surgical electrode is connected to the plasma generator.

[0024] Compared with the prior art, a technical solution proposed in the utility model is to form an injection channel inside the knife rod and provide a knife head at the end of the knife rod away from the handle; because the plasma required for the operation can only be formed in an electrolyte solution (such as saline solution, etc.), a liquid outlet hole connected to the injection channel is provided on the knife head; in this way, the electrolyte solution required to generate plasma can be injected through the injection channel, and then flow out through the liquid outlet hole to reach the knife head. In order to prevent the electrolyte solution from being too high in hydraulic pressure and being ejected in a jet-like manner at the outlet and unable to accurately reach the position of the cutter head, a slow-flow component is provided in the injection channel near the outlet in this solution. The slow-flow component can, on the one hand, support the injection channel to prevent the cross-sectional area from being reduced due to deformation, thereby avoiding the increase in water pressure caused by the reduction in the cross-sectional area of ​​the liquid flow and reducing its outlet pressure; on the other hand, it can form a barrier to the high-hydraulic liquid in the injection channel, so that the liquid is diverted in multiple directions on the surface of the slow-flow component, increasing the flow direction of the liquid inside the injection channel. Compared with the liquid flowing in a single water column, it slowly flows out of the outlet and then flows along the outer wall of the cutter head to the working surface. At this time, the entire head of the cutter head is surrounded by the electrolyte solution, which is more conducive to the formation of plasma. At the same time, the heat generated during the operation will be promptly taken away by the electrolyte solution, and local high temperature will not occur, avoiding thermal damage to the tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a plasma surgical electrode for preventing liquid spraying according to the utility model;

[0027] Figure 2 This is a schematic diagram of the combined structure of the knife bar and the knife head in one embodiment of the plasma surgical electrode for preventing liquid spraying of the utility model;

[0028] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0029] Figure 4It is a structural schematic diagram of a slow-flow component in an embodiment of a plasma surgical electrode for preventing liquid spraying of the utility model;

[0030] Figure 5 It is a schematic structural diagram of a cutter head in another embodiment of a plasma surgical electrode for preventing liquid spraying of the utility model;

[0031] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0032] Description of Figure Numbers:

[0033] Label name Label name 100 handle 321 Working surface 200 Tool bar 323 Suction port 210 Injection channel 330 Electrode wire 300 Cutting head 400 Slow flow parts 310 Electrode tube 500 Injection tube 311 Liquid outlet 510 Flow Control Valves 3111 First hole edge 520 Luer adapter 3113 Second hole edge 600 Cable Assemblies 320 Fixings 700 Suction tube

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. 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 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 utility model.

[0039] Plasma surgical electrodes usually include a handle, a knife rod, a knife head, a cable, a water injection pipeline, and a suction pipeline, among which the water injection pipeline is used to inject a conductive medium such as saline into the knife head, and the suction pipeline is used to suck out blood or residual tissue. When the flow of saline in the water injection pipeline is large, the saline may even spray out from the water outlet in a jet-like manner in a direction away from the knife head, preventing it from reaching the working surface on the knife head. This is not conducive to the generation of plasma on the working surface, nor is it conducive to cooling the soft tissue during surgery, affecting surgical efficiency and thermal damage. It is not friendly to doctors and patients, and unexpected thermal damage will affect the patient's postoperative recovery.

[0040] Based on this, the utility model proposes a plasma surgical electrode that prevents liquid spraying. In order to prevent the hydraulic pressure of the electrolyte solution from being too large and spraying out in a jet shape at the liquid outlet and failing to accurately reach the position of the cutter head, in this solution, a flow retarder is provided in the injection channel near the liquid outlet. The setting of the flow retarder can increase the flow cross-sectional area of ​​the electrolyte solution and reduce its outlet pressure, so that the electrolyte solution can flow out through the liquid outlet and accurately reach the working surface of the cutter head along the outer wall of the cutter head, which is conducive to the generation of plasma.

[0041] like Figure 1 - Figure 6 As shown, the plasma surgical electrode for preventing liquid ejection comprises:

[0042] Handle 100;

[0043] The knife rod 200 is connected to the handle 100, and a liquid injection channel 210 is formed inside the knife rod 200;

[0044] The cutter head 300 is fixedly connected to the end of the cutter bar 200 away from the handle 100, the injection channel 210 extends to the inside of the cutter head 300, the cutter head 300 is provided with a liquid outlet 311 connected to the injection channel 210, and the cutter head 300 has a working surface 321 away from the cutter bar 200; and

[0045] The slow-flow member 400 is supported inside the injection channel 210 and is arranged close to the liquid outlet 311 . The liquid in the injection channel 210 flows slowly through the slow-flow member 400 and then flows out from the liquid outlet 311 and flows along the outer wall of the cutter head 300 to the working surface 321 .

[0046] In the technical solution adopted in this embodiment, an injection channel 210 is formed inside the knife rod 200, and a knife head 300 is provided at one end of the knife rod 200 away from the handle 100; since the plasma required for surgery can only be formed in an electrolyte solution (such as physiological saline, etc.), a liquid outlet 311 connected to the injection channel 210 is provided on the knife head 300; in this way, the electrolyte solution required for generating plasma can be injected from the injection channel 210, and then flow out through the liquid outlet 311 to reach the knife head 300. In some common knife heads 300 of plasma surgical electrodes, the injection channel 210 is formed by the gap between the inner and outer tubes. During assembly or use, the distance between the inner and outer tubes will inevitably deviate, resulting in a reduction in the gap, which reduces the cross-sectional area of ​​the injection channel 210 and causes a larger hydraulic pressure of the electrolyte solution flowing through. In order to prevent the electrolyte solution from being too high in hydraulic pressure and being ejected in a jet-like manner at the outlet hole 311 and unable to accurately reach the position of the cutter head 300, a slow-flow member 400 is provided in the injection channel 210 near the outlet hole 311 in this solution. The slow-flow member 400 can, on the one hand, support the injection channel 210 to prevent the cross-sectional area from being reduced due to deformation, thereby avoiding the increase in water pressure caused by the reduction in the cross-sectional area of ​​the liquid flow and reducing its outlet pressure; on the other hand, it can form a barrier to the high-hydraulic liquid in the injection channel 210, so that the liquid is diverted in multiple directions on the surface of the slow-flow member 400, increasing the flow direction of the liquid inside the injection channel 210. Compared with the liquid flowing in a single water column, it slowly flows out of the outlet hole 311 and then flows along the outer wall of the cutter head 300 to the working surface 321. At this time, the head of the entire cutter head 300 is surrounded by the electrolyte solution, which is more conducive to the formation of plasma. At the same time, the heat generated during the operation will be taken away by the electrolyte solution in a timely manner, and local high temperature will not occur, avoiding thermal damage to the tissue.

[0047] Specifically, in this embodiment, the specific shape of the slow flow member 400 is not specifically limited. For example, it can be a sphere, or a polyhedron such as a cuboid, as long as it can form a certain barrier to the liquid inside the injection channel 210, widen the flow direction of the liquid, and is conducive to increasing the flow cross-sectional area of ​​the electrolyte solution. It should be noted that the thickness of the slow flow member 400 is not specifically limited, as long as it can separate other pipelines (such as the suction tube 700) in the cutter head 300 from the inner wall of the cutter head 300. In this way, an isolation space will be formed between other pipelines in the cutter head 300 and the inner wall of the cutter head 300, effectively avoiding the problem of the pipe wall of other pipelines fitting with the inner wall of the cutter head 300 and causing the liquid outlet 311 to be blocked. The shape of the liquid outlet 311 is not specifically limited, for example, it can be square, or it can be circular, etc., as long as it is a through hole connected to the injection channel 210. In addition, the size and number of the liquid outlet 311 are not specifically limited, and can be appropriately arranged according to the size of the cutter head 300. Preferably, the shape of the liquid outlet hole 311 is a water drop shape. Further preferably, at least three liquid outlet holes 311 are provided, and the three liquid outlet holes 311 are evenly spaced.

[0048] Alternatively, if Figure 2 and Figure 3 As shown, in one embodiment of the utility model, the specific setting position of the slow-flow member 400 is not specifically limited, as long as it is set close to the liquid outlet 311. As one of the preferred schemes, the slow-flow member 400 is arranged on the side of the liquid outlet 311 away from the knife rod 200. In this way, the slow-flow member 400 will not cause a large flow resistance to the electrolyte solution, but also increase its flow cross-sectional area in the suction channel and reduce the hydraulic pressure. Of course, in other embodiments, the slow-flow member 400 can also be arranged on the side of the liquid outlet 311 close to the knife rod 200 to widen the cross-sectional area of ​​the liquid in the injection channel 210, so that the liquid passing here will be diverted on the surface of the slow-flow member 400 and then flow out of the liquid outlet 311, rather than being sprayed out of the liquid outlet 311 in the form of a jet column, thereby playing a role in reducing the hydraulic pressure.

[0049] Optionally, in one embodiment of the utility model, there are two methods for fixing the flow slowdown piece 400, one of which is to directly weld the flow slowdown piece 400 to the inner wall of the cutter head 300 when producing it. The welding process can make the connection between the flow slowdown piece 400 and the inner wall of the cutter head 300 more firmly, which is beneficial to improve the service life and performance of the entire cutter head 300. Moreover, the fixation of the flow slowdown piece 400 is completed during the production process, which can save subsequent assembly time and improve production efficiency; the second is to bond the flow slowdown piece 400 to the inner wall of the injection channel 210 after the production of the cutter head 300 is completed. The bonding method will not affect the production process of the cutter head 300, and can be performed after the cutter head 300 is manufactured. In addition, the bonding process is relatively simple, does not require special equipment and skills, and is easy to operate.

[0050] Alternatively, if Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of the utility model, in order to better isolate other pipelines in the cutter head 300 from the inner wall of the cutter head 300, preferably, the slow flow member 400 is arranged in an I-shaped configuration, so that the upper and lower plates in the I-shaped design can better support the pipe wall and the inner wall of the cutter head 300, and are more conducive to preventing the blockage of the liquid outlet 311. Of course, in order to simplify the production process, the slow flow member 400 can also be in the shape of a cubic structure such as a cube or a cuboid.

[0051] Alternatively, if Figure 5 and Figure 6 As shown, in one embodiment of the utility model, in order to facilitate the solution to flow smoothly toward the working surface 321 of the cutting head 300, the liquid outlet hole 311 in this embodiment is arranged at an angle, wherein the liquid outlet hole 311 has a first hole edge 3111 arranged on the inner wall of the cutting head 300 and a second hole edge 3113 arranged on the outer wall of the cutting head 300. Preferably, the first hole edge 3111 and the second hole edge 3113 are arranged in an offset manner, and the first hole edge 3111 is arranged close to the cutting rod 200, and the second hole edge 3113 is arranged away from the cutting rod 200, so that the solution can be guided to flow toward the working surface 321.

[0052] Alternatively, if Figure 1 As shown, in one embodiment of the utility model, in order to supply electrolyte solution into the injection channel 210, the plasma surgical electrode for preventing liquid spraying also includes an injection tube 500, one end of which extends to the interior of the handle 100 and is connected to the injection channel 210. In this way, an electrolyte solution such as physiological saline can be injected into the injection channel 210 from the injection tube 500, and then flows out from the liquid outlet 311 to reach the blade head 300, thereby providing the blade head 300 with the environmental conditions required for generating plasma.

[0053] Alternatively, if Figure 1As shown, in one embodiment of the utility model, in order to facilitate the control of the flow rate of the solution in the injection channel 210, a flow control valve 510 is provided on the injection tube 500. The flow control valve 510 is arranged on the outside of the injection tube 500. The flow rate inside the injection tube 500 can be controlled by changing the degree of flattening of the injection tube 500, thereby changing the flow rate in the injection channel 210.

[0054] Alternatively, if Figure 1 As shown, in one embodiment of the utility model, in order to facilitate the connection between the external electrolyte solution supply device and the injection tube 500, a Luer adapter 520 is provided on the injection tube 500, and the Luer adapter 520 is arranged at the end of the injection tube 500 away from the knife rod 200. The setting of the Luer adapter 520 can better connect the injection tube 500 with the electrolyte solution supply device, ensure the stability of the joint between the two, and prevent water leakage caused by poor connection.

[0055] Alternatively, if Figure 1 As shown, in one embodiment of the utility model, in order to provide the electric energy required for the surgical process to the cutter head 300 so that plasma can be generated at the cutter head 300, the plasma surgical electrode for preventing liquid spraying also includes a cable assembly 600, and the cable assembly 600 is connected to the cutter head 300 through the handle 100 and the cutter rod 200. Specifically, one end of the cable assembly 600 is connected to the external plasma generator, and the other end passes through the inside of the handle 100 and the cutter rod 200 in sequence to be electrically connected to the cutter head 300. It can be understood that at least two electrical conductors need to be provided in the cable assembly 600, which are respectively connected to the electrode tube 310 and the electrode wire 330.

[0056] Alternatively, if Figure 3 and Figure 5 As shown, in one embodiment of the present utility model, the cutter head 300 includes:

[0057] The electrode tube 310 is connected to the end of the knife rod 200 away from the handle 100. The electrode tube 310 is communicated with the injection channel 210 and is provided with a liquid outlet 311.

[0058] A fixing member 320 is fixedly disposed on a side of the electrode tube 310 away from the knife rod 200 , and the fixing member 320 is formed with a working surface 321 ; and

[0059] The electrode wire 330 is fixedly disposed on the working surface 321 of the fixing member 320 .

[0060] Specifically, the electrode tube 310 and the electrode wire 330 are both connected to the cable assembly 600, so that one of the electrode tube 310 and the electrode wire 330 is the output pole and the other is the return pole; and a fixing member 320 is also provided between the electrode tube 310 and the electrode wire 330. In order to ensure that the electrode tube 310 and the electrode wire 330 have different positive and negative poles, the fixing member 320 should be made of insulating material, such as ceramic. It can be understood that in order to guide the blood and residual tissues produced during the operation, the fixing member 320 is preferably a columnar shape with a suction port 323 running through the middle, and the suction port 323 is connected to the suction channel; preferably, the electrode wire 330 is a plurality of electrode wires and is commonly arranged on the fixing member 320; further preferably, the plurality of electrode wires are arranged in parallel and spaced apart and bent and installed on the fixing member 320, and the bending area of ​​the electrode wire is conducive to the concentration of energy, which is convenient for cutting or ablation, etc.; or, three electrode wires are connected end to end to form a triangle distribution, so that the three corners of the triangle are more conducive to the concentration of energy. Preferably, a suction port 323 is provided on the fixing member 320 for timely extracting blood or residual tissue generated during the operation. There is no specific limitation on the shape of the suction port 323, for example, it can be triangular or circular, as long as it is a through hole that penetrates the fixing member 320.

[0061] Optionally, in an embodiment of the utility model, in order to extract blood or residual tissue generated at the surgical site, a suction channel is further provided inside the knife rod 200, and the suction channel extends to the inside of the knife head 300 and is connected to the suction port 323. In order to timely guide the blood and residual tissue extracted from the suction channel, the plasma surgical electrode for preventing liquid spraying further includes a suction tube 700, and one end of the suction tube 700 extends into the inside of the handle 100 and is connected to the suction channel, so that the blood or residual tissue at the surgical site can be timely extracted into the suction tube 700 through the suction channel, and then discharged from the body, effectively preventing the blood from increasing in temperature during surgery and causing unexpected thermal damage to the tissue, while maintaining a clear surgical field of view, which is conducive to the smooth and continuous progress of the surgery.

[0062] To achieve the above purpose, the utility model also proposes a plasma surgical device, which includes a plasma generator and a plasma surgical electrode for preventing liquid spraying as described in any of the above embodiments, wherein the plasma generator is connected to the plasma surgical electrode, for example, the plasma surgical electrode can be electrically connected to the plasma generator through a cable assembly, and the plasma generator is used to provide high-frequency energy to the blade of the plasma surgical electrode. The specific structure of the plasma surgical electrode refers to the above embodiments. Since the present plasma surgical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0063] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A plasma surgical electrode for preventing liquid spraying, characterized in that: include: handle; A knife rod connected to the handle, wherein a liquid injection channel is formed inside the knife rod; A cutter head is fixedly connected to an end of the cutter bar away from the handle, the injection channel extends to the interior of the cutter head, the cutter head is provided with a liquid outlet hole connected to the injection channel, and the cutter head has a working surface away from the cutter bar; and A flow-slowing member is supported and arranged inside the injection channel and close to the liquid outlet. The liquid in the injection channel flows slowly through the flow-slowing member and then flows out of the liquid outlet and along the outer wall of the cutter head to the working surface.

2. The plasma surgical electrode for preventing liquid spraying as claimed in claim 1, characterized in that: The slow-flow member is arranged on a side of the liquid outlet close to the knife rod; or, the slow-flow member is arranged on a side of the liquid outlet far from the knife rod.

3. The plasma surgical electrode for preventing liquid spraying as claimed in claim 1, characterized in that: The flow-delaying member is welded or bonded to the inner wall of the injection channel; and / or, The flow-delaying member is arranged in an I-shape or the flow-delaying member is arranged in a cubic structure.

4. The plasma surgical electrode for preventing liquid spraying as claimed in claim 1, characterized in that: The liquid outlet has a first hole edge arranged on the inner wall of the cutter head and a second hole edge arranged on the outer wall of the cutter head. The first hole edge and the second hole edge are staggered, and the first hole edge is arranged close to the cutter rod, and the second hole edge is arranged far away from the cutter rod.

5. The plasma surgical electrode for preventing liquid spraying as claimed in claim 1, characterized in that: The plasma surgical electrode for preventing liquid spraying further comprises a liquid injection tube, which is connected to the handle and communicates with the liquid injection channel through the handle.

6. The plasma surgical electrode for preventing liquid spraying as claimed in claim 5, characterized in that: The injection pipe is provided with a flow control valve, and the flow control valve is used to control the flow of the liquid in the injection pipe; and / or, The injection tube is provided with a Luer adapter, and the Luer adapter is arranged at one end of the injection tube away from the knife rod.

7. The plasma surgical electrode for preventing liquid spraying according to any one of claims 1 to 6, characterized in that: The plasma surgical electrode for preventing liquid spraying further comprises a cable assembly, and the cable assembly is connected to the knife head via the handle and the knife rod.

8. The plasma surgical electrode for preventing liquid spraying as claimed in claim 1, characterized in that: The cutter head comprises: An electrode tube, connected to one end of the knife rod away from the handle, the electrode tube is communicated with the injection channel and is provided with the liquid outlet; A fixing member, fixedly arranged on a side of the electrode tube away from the knife rod, the fixing member forming the working surface; and The electrode wire is fixedly arranged on the working surface of the fixing member.

9. The plasma surgical electrode for preventing liquid spraying as claimed in claim 8, characterized in that: A suction port is provided on the fixing member; a suction channel is also provided inside the knife rod, the suction channel extends to the inside of the knife head and is connected with the suction port; the plasma surgical electrode for preventing liquid spraying also includes a suction tube, the suction tube is connected to the handle, and is connected with the suction channel through the handle.

10. A plasma surgical device, characterized in that: The plasma surgery device comprises: The plasma surgical electrode for preventing liquid spraying according to any one of claims 1 to 9; and A plasma generator is connected to the plasma surgical electrode.

Images