High-frequency incision knife

Abstract

The high-frequency incision knife comprises a handle, a tube body, a connecting tube, an insulating sleeve and a cutting electrode, the handle is provided with a liquid injection connector and a liquid injection channel communicated with the liquid injection connector, one end of the tube body is connected with the handle, the tube body comprises an outer tube and an inner tube arranged in the outer tube in a penetrating mode, and the inner tube is communicated with the liquid injection channel. The connecting pipe penetrates through the outer pipe, and one end of the connecting pipe is connected with the end, away from the handle, of the inner pipe. The insulating sleeve penetrates through the end, away from the handle, of the outer pipe, one end of the insulating sleeve is connected with the other end of the connecting pipe, the other end of the insulating sleeve penetrates out of the outer pipe, one end of the cutting electrode penetrates through the connecting pipe, the other end of the cutting electrode penetrates out of the insulating sleeve, and a liquid passing channel is formed between the cutting electrode and the connecting pipe. An annular liquid outlet channel is formed between the cutting electrode and the insulating sleeve, and the liquid passing channel is communicated with the liquid injection channel and the liquid outlet channel. According to the high-frequency incision knife, the phenomenon that the cutting electrode is adhered to tissue is reduced, and the problem of thermal damage is avoided.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a high-frequency cutting knife. Background Technology

[0002] A high-frequency cutting knife, also known as a high-frequency electrosurgical knife or high-frequency electrosurgical unit, is a medical device that uses the heat energy generated by a high-frequency current to perform surgical cutting and coagulation. It can be used in various surgical procedures. A high-frequency cutting knife typically consists of a high-frequency main unit, a handle, and cutting electrodes. The high-frequency energy is transmitted to the cutting electrodes through the handle and applied to the lesion tissue to achieve the purpose of surgical cutting and coagulation.

[0003] However, during surgery, the cutting electrode of the high-frequency cutting knife is prone to adhering to the tissue in the surgical area, thereby causing thermal damage to the tissue. Utility Model Content

[0004] Therefore, it is necessary to provide a high-frequency cutting tool to reduce the adhesion between the cutting electrode and the tissue in the surgical area and to reduce thermal damage.

[0005] This application provides a high-frequency cutting knife, comprising:

[0006] The handle is provided with an injection connector for connecting to an external injection device, and an injection channel communicating with the injection connector is formed inside the handle;

[0007] The tube body, one end of which is connected to the handle, includes an outer tube and an inner tube passing through the outer tube, the lumen of which is in communication with the injection channel;

[0008] A connecting tube, which passes through the outer tube and one end of the connecting tube is connected to the end of the inner tube away from the handle;

[0009] An insulating sleeve is provided at the end of the outer tube away from the handle, and one end of the insulating sleeve is connected to the other end of the connecting tube, while the other end of the insulating sleeve extends out of the outer tube.

[0010] The device includes a cutting electrode, which is inserted into an insulating sleeve. One end of the cutting electrode is inserted into the connecting tube, and the other end is inserted out of the insulating sleeve. A liquid passage is formed between the cutting electrode and the connecting tube, and an annular liquid outlet passage is formed between the cutting electrode and the insulating sleeve. The liquid outlet passage is connected to the lumen of the inner tube through the liquid passage.

[0011] The technical solution will be further explained below:

[0012] In one embodiment, the connecting tube includes a first section and a second section connected axially, the first section passing through the inner tube and the second section passing through the insulating sleeve and the cutting electrode;

[0013] The outer wall of the connecting pipe is formed with a first positioning boss, which is located between the first segment and the second segment, and the first positioning boss abuts against the insulating sleeve.

[0014] The inner wall of the connecting tube is formed with a second positioning boss, which is located between the first segment and the second segment, and the second positioning boss abuts against the cutting electrode.

[0015] In one embodiment, the fluid passage is recessed in the inner wall of the second segment, the fluid passage extends axially along the second segment, the fluid passage passes through the second positioning boss and communicates with the lumen of the first segment.

[0016] In one embodiment, the inner wall of the second segment is provided with a plurality of liquid passages, all of which are spaced apart circumferentially along the second segment.

[0017] In one embodiment, the insulating sleeve includes a connecting section passing through the outer tube and a boss section located outside the outer tube, the connecting section being sleeved outside the connecting tube, and the outer diameter of the boss section being larger than the inner diameter of the outer tube.

[0018] In one embodiment, the outer wall of the connecting section is provided with protruding teeth, and the inner wall of the outer tube is provided with a limiting groove that cooperates with the protruding teeth.

[0019] In one embodiment, the handle is further provided with an electrode connector for connection to a power source, the electrode connector being electrically connected to the inner tube, and the connecting tube being electrically connected to the inner tube and the cutting electrode.

[0020] In one embodiment, the inner tube includes a conductive tube and an insulating tube. The conductive tube is electrically connected to the electrode connector and the connecting tube. The insulating tube is sleeved outside the conductive tube and connected to the connecting tube. The lumen of the insulating tube communicates with the liquid injection channel. The conductive tube has a spiral groove that extends spirally along the axial direction of the conductive tube and penetrates both the inner and outer walls of the conductive tube.

[0021] In one embodiment, the cutting electrode is a silver tweezer alloy.

[0022] In the aforementioned high-frequency cutting knife, a liquid injection channel is formed in the handle, communicating with the liquid injection connector. The lumen of the inner tube is connected to the liquid injection channel. A liquid passage is formed between the cutting electrode and the connecting tube. An annular liquid outlet channel is formed between the cutting electrode and the insulating sleeve, and the liquid passage connects the lumen of the inner tube and the liquid outlet channel. Thus, when liquid is injected into the liquid injection connector, the liquid enters the liquid injection channel from the connector, then sequentially enters the inner tube, the liquid passage, and the liquid outlet channel, and finally flows out from around the cutting electrode through the annular liquid outlet channel. Compared to traditional high-frequency cutting knives where liquid exits from the center of the cutting electrode, the high-frequency cutting knife of this application arranges the liquid outlet channel on the outer periphery of the cutting electrode, thereby enabling liquid to exit from around the cutting electrode. This allows for sufficient heat dissipation from around the cutting electrode, keeping the periphery of the cutting electrode at a low temperature, reducing the adhesion between the cutting electrode and tissue caused by overheating, and avoiding tissue thermal damage. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a high-frequency cutting knife according to one embodiment.

[0027] Figure 2 for Figure 1 The image shows a front view of the high-frequency cutting blade.

[0028] Figure 3 for Figure 2 The cross-sectional view of the high-frequency cutting knife shown.

[0029] Figure 4 for Figure 3 The image shows a magnified view of part B.

[0030] Figure 5 for Figure 2 The high-frequency cutting knife shown is in cross-sectional view of section AA.

[0031] Figure 6 This is a schematic diagram of the connecting pipe in one embodiment.

[0032] Figure 7 for Figure 6 The left view of the connecting pipe shown.

[0033] Figure 8 This is a schematic diagram of the structure of an insulating sleeve according to one embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 10. Handle; 11. Injection connector; 12. Electrode connector; 13. Outer tube; 14. Pull ring; 15. Slide rail; 20. Tube body; 21. Outer tube; 22. Inner tube; 221. Conductive tube; 222. Insulating tube; 23. Injection channel; 30. Cutting electrode; 40. Connecting tube; 41. Liquid passage; 42. First section; 43. Second section; 44. First positioning boss; 45. Second positioning boss; 50. Insulating sleeve; 51. Liquid outlet channel; 52. Connecting section; 53. Boss section; 54. Back teeth. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] As mentioned earlier, traditional high-frequency cutting knives are prone to adhesion between the cutting electrode and the surgical area during surgery, leading to tissue thermal damage. Through innovative research, the inventors of this application have discovered that the main reason for this is the poor heat dissipation of the cutting electrode in traditional high-frequency cutting knives, which easily leads to localized heat concentration. Specifically, current high-frequency cutting knives generally achieve cooling by injecting water into the surgical area and the cutting electrode. However, in traditional high-frequency cutting knives, water is usually injected into the surgical area through the central hole of the cutting electrode. The water can only flow through the central area of ​​the cutting electrode, resulting in limited heat dissipation and easily causing heat concentration in the peripheral area of ​​the cutting electrode. This leads to adhesion between the cutting electrode and the surgical area tissue, causing tissue thermal damage.

[0043] Based on this, one embodiment of this application provides a high-frequency cutting knife that can reduce tissue adhesion between the cutting electrode 30 and the surgical area, and reduce tissue thermal damage. Specifically, see [link to relevant documentation]. Figure 1 as well as Figure 2 One embodiment of the high-frequency cutting knife includes a handle 10, a tube 20, a connecting tube 40, an insulating sleeve 50, and a cutting electrode 30. The handle 10 is provided with an injection connector 11 for connecting to an external injection device, and an injection channel 23 communicating with the injection connector 11 is also formed in the handle 10. The "external injection device" refers to an external device that injects liquids such as saline or medication into the injection connector 11. One end of the tube 20 is connected to the handle 10, and the handle 10 is used to operate the tube 20.

[0044] Combination Figure 3 as well as Figure 4 The tube body 20 includes an outer tube 21 and an inner tube 22 inserted within the outer tube 21. The lumen of the inner tube 22 is connected to the injection channel 23. A connecting tube 40 is inserted within the outer tube 21, and one end of the connecting tube 40 is connected to the end of the inner tube 22 away from the handle 10. An insulating sleeve 50 is inserted at the end of the outer tube 21 away from the handle 10, and one end of the insulating sleeve 50 is connected to the other end of the connecting tube 40. The other end of the insulating sleeve 50 extends out of the outer tube 21. The insulating sleeve 50 is used to contact the lesion tissue during surgery to prevent the tip of the tube body 20 from puncturing the lesion tissue, thereby preventing perforation.

[0045] Furthermore, the cutting electrode is inserted into the insulating sleeve, one end of the cutting electrode 30 is inserted into the connecting pipe 40, and the other end of the cutting electrode 30 is inserted out of the insulating sleeve 50. A liquid passage 41 is formed between the cutting electrode 30 and the connecting pipe 40, and an annular liquid outlet channel 51 is formed between the cutting electrode 30 and the insulating sleeve 50. The liquid passage 41 connects the liquid injection channel 23 and the liquid outlet channel 51.

[0046] In the aforementioned high-frequency cutting knife, a liquid injection channel 23 is formed inside the handle 10, which is connected to the liquid injection connector 11. The lumen of the inner tube 22 is connected to the liquid injection channel 23. A liquid passage channel 41 is formed between the cutting electrode 30 and the connecting tube 40. An annular liquid outlet channel 51 is formed between the cutting electrode 30 and the insulating sleeve 50. The liquid passage channel 41 is connected to the lumen of the inner tube 22 and the liquid outlet channel 51. Thus, when liquid is injected into the injection connector 11, the liquid can enter the injection channel 23 from the injection connector 11, and then sequentially enter the inner tube 22, the liquid passage 41 and the liquid outlet channel 51 through the injection channel 23. Finally, it flows out from the periphery of the cutting electrode 30 through the annular liquid outlet channel 51. Compared with the traditional high-frequency cutting knife that outputs liquid from the center of the cutting electrode 30, the high-frequency cutting knife of this application arranges the liquid outlet channel 51 on the outer periphery of the cutting electrode 30, thereby enabling liquid to output from the periphery of the cutting electrode 30. This allows for sufficient heat dissipation from the periphery of the cutting electrode 30, keeping the periphery of the cutting electrode 30 at a low temperature. This reduces the phenomenon of the cutting electrode 30 sticking to the tissue due to overheating of the cutting electrode 30 and avoids the problem of tissue thermal damage.

[0047] See Figure 4 as well as Figure 6 In one embodiment, the connecting tube 40 includes a first section 42 and a second section 43 connected axially. The first section 42 passes through the inner tube 22, and the second section 43 passes between the insulating sleeve 50 and the cutting electrode 30, thereby realizing the connection between the inner tube 22 and the cutting electrode 30.

[0048] Furthermore, a first positioning boss 44 is formed on the outer wall of the connecting pipe 40. The first positioning boss 44 is located between the first section 42 and the second section 43. The first positioning boss 44 abuts against the insulating sleeve 50, which can improve the positioning accuracy of the insulating sleeve 50 and ensure that the insulating sleeve 50 is installed in place.

[0049] See Figure 7 In one embodiment, a second positioning boss 45 is formed on the inner wall of the connecting pipe 40. The second positioning boss 45 is located between the first segment 42 and the second segment 43. The second positioning boss 45 abuts against the cutting electrode 30, which can improve the positioning accuracy of the cutting electrode 30 and ensure that the cutting electrode 30 is installed in place.

[0050] See also Figure 5 as well as Figure 6 The fluid passage 41 is recessed into the inner wall of the second section 43, meaning the fluid passage 41 is a groove structure formed in the inner wall of the second section 43. The fluid passage 41 extends along the axis of the second section 43, passes through the second positioning boss 45, and communicates with the lumen of the first section 42. Since the first section 42 passes through the inner tube 22, the lumen of the first section 42 is connected to the lumen of the inner tube 22, thereby enabling the fluid passage 41 to communicate with the injection channel 23.

[0051] See Figure 5 In one embodiment, the inner wall of the second segment 43 is provided with multiple liquid channels 41, all of which are spaced apart circumferentially along the second segment 43. For example, there are three liquid channels 41, evenly distributed on the inner wall of the second segment 43, with the central angle between adjacent channels 41 being 120°. Understandably, in other embodiments, the number of liquid channels can be two, four, five, or more, and this is not limited. By providing multiple liquid channels 41 spaced apart on the inner wall of the second segment 43, the liquid flow rate can be increased while ensuring that the liquid flows out more evenly from around the cutting electrode 30, thereby improving the cooling effect.

[0052] See Figure 8 Optionally, in one embodiment, the insulating sleeve 50 includes a connecting section 52 passing through the outer tube 21 and a boss section 53 located outside the outer tube 21. The connecting section 52 is sleeved outside the connecting tube 40, and the outer diameter of the boss section 53 is larger than the inner diameter of the outer tube 21. Specifically, by configuring the outer diameter of the boss section 53 to be larger than the inner diameter of the outer tube 21, on the one hand, it can prevent the insulating sleeve 50 from entering the outer tube 21 as a whole, and on the other hand, by utilizing the limiting effect of the boss section 53, it can prevent the tube body 20 from puncturing the tissue, thereby preventing perforation.

[0053] See also Figure 8 In one embodiment, the outer wall of the connecting segment 52 is provided with protruding inverted teeth 54, and the inner wall of the outer tube 21 is provided with a limiting groove that engages with the inverted teeth 54. Specifically, the inverted teeth 54 are annular protrusions on the connecting segment 52, and the diameter of the annular protrusion gradually decreases along the direction close to the handle 10. This facilitates the insertion of the connecting segment 52 into the outer tube 21. Furthermore, the limiting groove matches the shape of the annular protrusion, and the limiting engagement between the inverted teeth 54 and the limiting groove prevents the insulating sleeve 50 from falling out of the outer tube 21.

[0054] See Figure 1 as well as Figure 2 In one embodiment, the handle 10 is further provided with an electrode connector 12 for connection to a power source. The electrode connector 12 is electrically connected to the inner tube 22, and the connecting tube 40 is electrically connected to the inner tube 22 and the cutting electrode 30. Thus, by connecting to a high-frequency power source through the electrode connector 12, current can be sequentially transmitted to the cutting electrode 30 along the electrode connector 12, the inner tube 22, and the connecting tube 40, thereby enabling the cutting electrode 30 to perform surgical cutting or coagulation.

[0055] See Figure 4Optionally, in one embodiment, the inner tube 22 includes a conductive tube 221 and an insulating tube 222. The conductive tube 221 is electrically connected to the electrode connector 12 and the connecting tube 40, thereby enabling the current of the electrode connector 12 to be transmitted to the connecting tube 40, and then from the connecting tube 40 to the cutting electrode 30.

[0056] Furthermore, the insulating tube 222 is sleeved outside the conductive tube 221 and connected to the connecting tube 40, and the cavity of the insulating tube 222 is connected to the liquid injection channel 23. The insulating tube 222 can isolate the conductive tube 221 from the outer tube 21, thereby preventing leakage.

[0057] Furthermore, combined Figure 6 In one embodiment, the conductive tube 221 is sleeved on the first section 42 of the connecting tube 40 and abuts against the first positioning boss 44, and the insulating tube 222 is sleeved on the first positioning boss 44 of the connecting tube 40 and abuts against the insulating sleeve 50. In this way, the positioning accuracy of the connecting tube 40 is improved and the connecting tube 40 is assembled in place.

[0058] Optionally, in one embodiment, the conductive tube 221 is a metal tube, such as a hollow steel tube. This ensures the conductivity of the conductive tube 221 while allowing it to support the insulating tube 222. Furthermore, the conductive tube 221 has a spiral groove (as shown in the figure). The spiral groove extends spirally along the axial direction of the conductive tube 221 and penetrates both the inner and outer walls of the conductive tube 221. This increases the flexibility of the conductive tube 221, making it easier for the surgeon to bend the tube 20 as needed during the operation, thus improving the operability of the surgery.

[0059] See Figure 2 In one embodiment, the handle 10 includes an outer tube 13, a pull ring 14, and a slide rail 15. The outer tube 13 is fitted onto the proximal end of the outer tube 21, and one end of the outer tube 13 is connected to the slide rail 15. The pull ring 14 is movably fitted onto the slide rail 15 and is connected to the inner tube 22. Thus, by pulling the pull ring 14, the inner tube 22 can be moved back and forth, thereby driving the cutting electrode 30 to perform surgical cutting. Furthermore, the electrode connector 12 passes through the outer tube 13, and the injection connector 11 passes through the pull ring 14.

[0060] Optionally, in one embodiment, the cutting electrode 30 is a silver tweezer alloy component. The silver tweezer alloy component has good electrical and thermal conductivity, enabling rapid cooling and improving the anti-adhesion performance of the cutting electrode 30. Simultaneously, the silver tweezer alloy component has good wear resistance and high strength, effectively increasing the service life of the cutting electrode 30.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high frequency dissecting knife characterized by comprising: The application relates to a cutting electrode, which comprises the following parts: a handle provided with a liquid injection connector for connecting an external liquid injection device, a liquid injection channel being formed in the handle and communicating with the liquid injection connector; a tube body, one end of which is connected with the handle, the tube body comprising an outer tube and an inner tube arranged in the outer tube, a lumen of the inner tube communicating with the liquid injection channel; a connecting tube arranged in the outer tube, one end of the connecting tube being connected with the inner tube far away from the handle; an insulating sleeve arranged in the outer tube far away from the handle, one end of the insulating sleeve being connected with the other end of the connecting tube, the other end of the insulating sleeve being arranged out of the outer tube; and a cutting electrode arranged in the insulating sleeve, one end of the cutting electrode being arranged in the connecting tube and the other end being arranged out of the insulating sleeve, a liquid passing channel being formed between the cutting electrode and the connecting tube, and an annular liquid outlet channel being formed between the cutting electrode and the insulating sleeve, the liquid outlet channel communicating with the lumen of the inner tube through the liquid passing channel. The connecting tube comprises axially connected first and second sections, the first section being arranged in the inner tube and the second section being arranged between the insulating sleeve and the cutting electrode. An outer wall of the connecting tube is provided with a first positioning boss between the first and second sections, the first positioning boss abutting against the insulating sleeve. An inner wall of the connecting tube is provided with a second positioning boss between the first and second sections, the second positioning boss abutting against the cutting electrode. The liquid passing channel is recessed in the inner wall of the second section, extends along the axial direction of the second section, and penetrates through the second positioning boss and communicates with the lumen of the first section. The inner wall of the second section is provided with a plurality of liquid passing channels, all the liquid passing channels being arranged in the circumferential direction of the second section.

2. The high frequency dissecting knife according to claim 1, wherein The insulating sleeve comprises a connecting section arranged in the outer tube and a boss section arranged outside the outer tube, the connecting section being arranged outside the connecting tube, and the boss section having an outer diameter greater than the inner diameter of the outer tube. An outer wall of the connecting section is provided with a reverse tooth, and an inner wall of the outer tube is provided with a limiting groove matched with the reverse tooth. The handle is further provided with an electrode connector for connecting with a power supply, the electrode connector being electrically connected with the inner tube, and the connecting tube electrically connecting the inner tube and the cutting electrode.

3. The high frequency dissecting knife according to claim 2, wherein The inner tube comprises a conductive tube electrically connected with the electrode connector and the connecting tube, and an insulating tube arranged outside the conductive tube and connected with the connecting tube, the lumen of the insulating tube communicating with the liquid injection channel.

4. The high frequency knife according to claim 3, characterized by The conductive tube is provided with a spiral groove, the spiral groove extending along the axial direction of the conductive tube and penetrating through the inner wall and the outer wall of the conductive tube.

5. The high frequency knife according to claim 1, wherein The cutting electrode is made of silver alloy.

6. The high frequency knife according to claim 5, wherein ​ 7. The high frequency knife according to claim 1, wherein ​ 8. The high frequency knife according to claim 7, characterized by ​ 9. The high frequency knife according to claim 8, characterized by ​ 10. The high frequency dissection knife according to any one of claims 1 to 9, characterized in that ​

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