Radiofrequency plasma ablation electrodes

Abstract

The present invention relates to the field of medical device technology, and in particular to a radio frequency plasma ablation surgical electrode. The radio frequency plasma ablation surgical electrode provided by the present invention comprises a guide tube, a first electrode wire, a second electrode wire, a first electrode head, a second electrode head and an insulating sleeve; the first electrode wire and the second electrode wire are arranged in the guide tube, the first electrode head and the second electrode head are located at one end of the guide tube, the second electrode head is a hollow cylindrical structure, the second electrode head is sleeved on the periphery of the first electrode head, one end of the first electrode head is exposed outside the opening of one end of the second electrode head, and the first electrode head and the second electrode head are separated by an insulating sleeve. The radio frequency plasma ablation surgical electrode of the present invention is suitable for endoscopic coagulation of bleeding points and ablation of a small range of flocculent tissue, and is also suitable for endoscopic ablation of a large area and a high power, thereby reducing the number of surgical electrodes used in the endoscopic fusion surgery process.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a radio frequency plasma ablation surgical electrode. Background Art

[0002] The endoscopic ablation and coagulation electrodes currently used in the market have symmetrical bean-shaped electrode heads at the front end, with a small gap between the two electrode heads. They are only suitable for ablation of bleeding points and small-scale flocculent tissues, and cannot be used for large-scale ablation of other tissue forms. With the development of science and technology, endoscopic surgery is not just a single surgery for removing the nucleus pulposus and ablation and coagulation. Endoscopic fusion has put forward higher requirements for ablation and hemostasis electrodes. At present, in order to complete high-quality endoscopic fusion surgery, different electrosurgical equipment and electrodes that match various surgical equipment are required, which not only increases the equipment procurement cost of the hospital, but also increases the treatment cost of patients. Summary of the invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a radio frequency plasma ablation surgical electrode that is suitable for both endoscopic coagulation of bleeding points and ablation of a small range of flocculent tissue and endoscopic ablation of a large area.

[0004] The present invention provides a radio frequency plasma ablation surgical electrode, comprising a guide tube, a first electrode wire, a second electrode wire, a first electrode head, a second electrode head and an insulating sleeve; the first electrode wire and the second electrode wire are arranged in the guide tube, the first electrode head and the second electrode head are located at one end of the guide tube, one end of the first electrode wire is connected to the first electrode head, and one end of the second electrode wire is connected to the second electrode head; the second electrode head is a hollow cylindrical structure with openings at both ends, the second electrode head is sleeved on the periphery of the first electrode head, and one end of the first electrode head is exposed outside the opening of one end of the second electrode head, and the first electrode head and the second electrode head are separated by the insulating sleeve.

[0005] Optionally, an end surface of one end of the first electrode head exposed outside an opening at one end of the second electrode head is formed as a tapered plane.

[0006] Optionally, the first electrode head is formed as an umbrella-shaped electrode head with a large cross-sectional diameter at the front end and a small cross-sectional diameter at the rear end, and the front end face of the first electrode head is formed as the conical plane; a step hole is formed on the insulating sleeve, the first electrode head is located in the step hole, and the front end face of the first electrode head protrudes from the front end face of the insulating sleeve.

[0007] Optionally, the front end portion of the insulating sleeve is formed into a hollow truncated cone, and the cone angle of the truncated cone where the front end portion of the insulating sleeve is located is smaller than the cone angle of the cone where the conical plane is located.

[0008] Optionally, a step surface is formed on the outer side surface of the front end portion of the insulating sleeve, and the second electrode head sleeve is arranged on the periphery of the insulating sleeve and is located between the step surface and the front end surface of the guide tube.

[0009] Optionally, the radio frequency plasma ablation surgical electrode further includes an outer sheath tube, the guide tube is inserted into the outer sheath tube, and the front end portion of the guide tube can be extended out of or retracted into the outer sheath tube.

[0010] Optionally, the guide tube is a flexible tube, a hard tube is sleeved on a partial section of the guide tube, the hard tube is located inside the outer sheath tube, and the front end of the hard tube is at a distance of 10 mm to 15 mm from the front end of the guide tube.

[0011] Optionally, when the length of the tube section where the front end portion of the guide tube protrudes out of the outer sheath tube reaches a maximum, the front end of the hard tube is flush with the front end of the outer sheath tube.

[0012] Optionally, the radio frequency plasma ablation surgical electrode also includes a sleeve assembly and an electrode handle, the electrode handle having two handle ends, each of the handle ends forming a U-shaped slot, and a snap-in position matching the shape of the U-shaped slot is formed on the outer peripheral surface of the sleeve assembly, and the U-shaped slot is snapped into the snap-in position.

[0013] Optionally, the sleeve assembly includes a first sleeve part and a second sleeve part that are movably connected; an outer sheath is provided on the periphery of the guide tube, the front end of the guide tube can extend out of or retract into the outer sheath, the rear end of the outer sheath is fixedly connected to the first sleeve part, the other end of the first electrode wire and the other end of the second electrode wire pass through the first sleeve part and are fixedly connected to the plug cable through the second sleeve part; one handle end of the electrode handle is connected to the first sleeve part, and the other handle end of the electrode handle is connected to the second sleeve part.

[0014] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0015] The radio frequency plasma ablation surgical electrode provided in the embodiment of the present invention has a first electrode head and a second electrode head that are arranged inside and outside. The second electrode head is a hollow cylindrical structure with openings at both ends. The second electrode head is sleeved on the periphery of the first electrode head, and one end of the first electrode head is exposed outside the opening of one end of the second electrode head. The first electrode head and the second electrode head are separated by an insulating sleeve. The two electrode heads arranged in this way can withstand higher power currents than traditional symmetrical bean-shaped electrode heads. They are suitable for use with radio frequency machines to complete endoscopic coagulation of bleeding points and ablation of small-scale flocculent tissues, and are also suitable for use with plasma equipment to complete endoscopic large-area, high-power ablation, which meets the sharing of radio frequency machines and plasma equipment, thereby reducing the number of surgical electrodes used in endoscopic fusion surgery, thereby reducing the equipment procurement costs of the hospital and the treatment costs of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0017] In order to more clearly illustrate the embodiments of the present invention 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is a structural schematic diagram of a radio frequency plasma ablation surgical electrode according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structure diagram of a radio frequency plasma ablation surgical electrode according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of a radio frequency plasma ablation surgical electrode according to another embodiment of the present invention;

[0022] Figure 5 This is a schematic structural diagram of a radio frequency plasma ablation surgical electrode according to another embodiment of the present invention.

[0023] Among them, 10-guide tube; 11-first electrode wire; 12-second electrode wire; 13-first electrode head; 14-second electrode head; 15-insulating sleeve; 151-step hole; 152-step surface; 16-outer sheath tube; 17-hard tube;

[0024] 18 - electrode handle; 181 - first handle end; 182 - second handle end; 19 - sleeve assembly; 191 - first sleeve component; 192 - second sleeve component. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] See also Figure 1 and Figure 2 The embodiment of the present invention provides a radio frequency plasma ablation surgical electrode, which is suitable for completing coagulation and ablation functions under endoscope. Specifically, the radio frequency plasma ablation surgical electrode includes: a guide tube 10, a first electrode wire 11, a second electrode wire 12, a first electrode head 13, a second electrode head 14 and an insulating sleeve 15. Among them, the first electrode wire 11 and the second electrode wire 12 are arranged in the guide tube 10, the first electrode head 13 and the second electrode head 14 are located at one end of the guide tube 10, one end of the first electrode wire 11 is connected to the first electrode head 13, and one end of the second electrode wire 12 is connected to the second electrode head 14; the second electrode head 14 is a hollow cylindrical structure with two ends open, the second electrode head 14 is sleeved on the periphery of the first electrode head 13, and one end of the first electrode head 13 is exposed outside the opening of one end of the second electrode head 14, and the first electrode head 13 and the second electrode head 14 are separated by the insulating sleeve 15.

[0028] The radio frequency plasma ablation surgical electrode provided by the above embodiment of the present invention, the first electrode head 13 and the second electrode head 14 are arranged inside and outside, the second electrode head 14 is a hollow cylindrical structure with openings at both ends, the second electrode head 14 is sleeved on the periphery of the first electrode head 13, and one end of the first electrode head 13 is exposed outside the opening of one end of the second electrode head 14, the first electrode head 13 and the second electrode head 14 are separated by an insulating sleeve 15, the two electrode heads arranged in this way can withstand higher power current compared to traditional symmetrical bean-shaped electrode heads, and are suitable for use with radio frequency machines to complete endoscopic coagulation of bleeding points and ablation of small-scale flocculent tissue, and are also suitable for use with plasma equipment to complete endoscopic large-area, high-power ablation, which meets the sharing of radio frequency machines and plasma equipment, thereby reducing the number of surgical electrodes used in endoscopic fusion surgery, reducing the equipment procurement cost of the hospital, and reducing the treatment cost of patients.

[0029] Specifically, when endoscopic coagulation and ablation of a small area of ​​flocculent tissue are required, the RF plasma ablation surgical electrode is connected to a matching RF machine, and RF current is input into the RF plasma ablation surgical electrode through the RF machine. The RF current flows between the two electrode heads and directly acts on the acted tissue (human tissue). The acted tissue is equivalent to a resistor, and the RF current generates resistive heat through the acted tissue, thereby achieving the coagulation of local points and the ablation of a small area of ​​flocculent tissue. When large-area endoscopic ablation is required (such as large-area bone plate ablation), the RF plasma ablation surgical electrode is connected to a matching RF machine, and a RF current is input into the RF plasma ablation surgical electrode through the RF machine. The RF current flows between the two electrode heads and directly acts on the acted tissue (human tissue). The acted tissue is equivalent to a resistor, and the RF current generates resistive heat through the acted tissue, thereby achieving the coagulation of local points and the ablation of a small area of ​​flocculent tissue. The sub-ablation surgical electrode is connected to the matching plasma equipment, and the electrode head of the radio frequency plasma ablation surgical electrode is inserted into the vicinity of the affected tissue (human tissue) through the endoscope channel. Using 100KHz alternating current, the power can be added to 100W. In the state of physiological saline in the endoscope channel, the physiological saline is ionized to form a plasma ionosphere. The ions in the ionosphere are accelerated by the electric field and transfer energy to the affected tissue, interrupting the molecular bonds between the cells of the affected tissue at low temperature, and decomposing the cells in the affected tissue into carbohydrates and oxides, thereby liquefying and ablating the affected tissue, achieving large-area ablation function.

[0030] It should be noted that since the radio frequency plasma ablation surgical electrode of the present invention is used under an endoscope, the physiological saline injected through the endoscope channel can be used to provide an electrolyte environment for the radio frequency plasma ablation surgical electrode, so there is no need to additionally set up an injection channel or other structure on the radio frequency plasma ablation surgical electrode of the present invention.

[0031] See also Figure 2 The guide tube 10 may be a double-lumen hose, and the first electrode wire 11 and the second electrode wire 12 are respectively arranged in the two chambers of the guide tube 10 to separate the first electrode wire 11 and the second electrode wire 12. Of course, the structure of the guide tube 10 is not limited to a double-lumen hose, and the first electrode wire 11 and the second electrode wire 12 may also be separated by arranging two independent hoses in the guide tube 10, or by adding insulating components around the first electrode wire 11 and the second electrode wire 12.

[0032] See also Figure 2 and Figure 3 , the end face of the first electrode head 13 exposed outside the opening of one end of the second electrode head 14 is formed into a conical plane, that is, the front end face of the first electrode head 13 is formed into a conical plane. The front end face of the first electrode head 13 adopts a conical plane, so that the first electrode head 13 can withstand high-power current, the ablation area is increased, and a large area of ​​bone plate ablation can be performed in the state of physiological saline (or other electrolytes). Of course, the front end face of the first electrode head 13 is not limited to a conical plane, and can also be other shapes similar to the conical plane, such as a conical surface with a certain curvature, an arc surface, etc.

[0033] Continue reading Figure 2 and Figure 3 The first electrode head 13 is formed into an umbrella-shaped electrode head with a large cross-sectional diameter at the front end and a small cross-sectional diameter at the rear end. A step hole 151 is formed on the insulating sleeve 15. The first electrode head 13 is located in the step hole 151 formed on the insulating sleeve 15, and the front end surface of the first electrode head 13 protrudes from the front end surface of the insulating sleeve 15. The first electrode head 13 is designed as an umbrella-shaped electrode head, and the front end surface of the umbrella-shaped electrode head is formed as a conical plane, which not only enables the first electrode head 13 to withstand high-power current, but also makes the first electrode head 13 suitable for transmitting and generating plasma, thereby realizing the ionization of physiological saline to form plasma and completing large-area bone plate ablation; a limiting step is formed at the connection between the front end and the rear end of the first electrode head 13, and the first electrode head 13 is located in the step hole 151 formed on the insulating sleeve 15, and the limiting step is against the step in the step hole 151, forming a limit for the first electrode head 13. Of course, the shape of the first electrode head 13 is not limited to the above specific definition, and can also be designed as a cylindrical shape, or other shapes such as a conical front end and a cylindrical rear end according to needs. It should be noted that the shape and structure of the first electrode head 13 will affect the maximum power and electrolysis rate that the first electrode head 13 can withstand, so the shape and structure of the first electrode head 13 can be reasonably adjusted and designed according to actual conditions.

[0034] Continue reading Figure 2 and Figure 3 The front end of the insulating sleeve 15 is formed into a hollow truncated cone, and the cone angle of the truncated cone where the front end of the insulating sleeve 15 is located is smaller than the cone angle of the cone where the conical plane formed by the front end surface of the first electrode head 13 is located. How to design the front end electrode of the entire radio frequency plasma ablation surgical electrode to make the design structure more reasonable and beautiful, and to make the conical plane at the front end of the first electrode head 13 completely protrude from the top surface and conical surface of the front end truncated cone of the insulating sleeve 15. Of course, the specific shape and structure of the insulating sleeve 15 are not limited to the above specific limitations, and can be reasonably adjusted and designed according to actual conditions.

[0035] Continue reading Figure 2 and Figure 3 The side surface of the front end of the insulating sleeve 15 is formed with a step surface 152, and the second electrode head 14 is a hollow cylindrical structure (or called a metal ring or a metal hoop). The second electrode head 14 is sleeved on the outer periphery of the insulating sleeve 15 and is located between the step surface 152 and the front end surface of the guide tube 10. In this way, on the one hand, the insulating sleeve 15 is used to separate the first electrode head 13 and the second electrode head 14, and on the other hand, the second electrode head 14 is limited to ensure the firmness of the assembly of the second electrode head 14.

[0036] In some embodiments, see Figure 2 and Figure 3The radio frequency plasma ablation surgical electrode also includes an outer sheath 16, and the guide tube 10 is inserted into the outer sheath 16, and the front end of the guide tube 10 can be extended out of or retracted into the outer sheath 16. It should be understood that the front end of the guide tube 10 can also be called the distal end of the guide tube 10. The outer sheath 16 is generally made of a stainless steel tube, and the guide tube 10 is generally made of a flexible tube, such as a plastic tube (specifically, a nylon hose), etc. The length of the tube section of the front end of the guide tube 10 that can be extended out of the outer sheath 16 is generally 10mm to 15mm, and the front end of the guide tube 10 can generally rise (or bend) at an angle of about 45 degrees (the first electrode wire 11 and the second electrode wire 12 are generally made of memory metal, and the bending of the front end of the guide tube 10 can be achieved by bending the front ends of the first electrode wire 11 and the second electrode wire 12). However, when the front end of the guide tube 10 extending out of the outer sheath 16 is axially moving, since the guide tube 10 is a hose, its elastic deformation is large, so the front end of the guide tube 10 is easy to deform, thereby affecting the quality of the operation.

[0037] In order to reduce the deformation caused by the strain on the front end of the guide tube 10, refer to Figure 4 The guide tube 10 is a flexible tube, and a hard tube 17, such as a metal tube (specifically a stainless steel tube), is sleeved on a part of the guide tube 10. The hard tube 17 is fixedly connected to the guide tube 10, and the hard tube 17 is located in the outer sheath 16. The distance between the front end of the hard tube 17 and the front end of the guide tube 10 is within the range of 10mm to 15mm, ensuring that the hard tube 17 is sleeved on the part of the guide tube 10 that does not protrude from the outer sheath 16. The strength and supporting force of the hard tube 17 are greater than those of the flexible tube (i.e., the guide tube 10), so that the elastic deformation of the guide tube 10 is reduced by using the hard tube 17, and the pulling force of the guide tube 10 is increased, so that it is more convenient to use clinically and improves the quality of surgery.

[0038] Continue reading Figure 4 In order not to affect the normal bending of the front end of the guide tube 10 after protruding out of the outer sheath tube 16, when the length of the tube section of the front end of the guide tube 10 protruding out of the outer sheath tube 16 reaches the maximum value, the front end of the hard tube 17 is flush with the front end of the outer sheath tube 16. Of course, the front end of the hard tube 17 can also be designed to be always located in the outer sheath tube 16 as needed.

[0039] In some embodiments, see Figure 5The radio frequency plasma ablation surgical electrode also includes a sleeve assembly 19 and an electrode handle 18. The electrode handle 18 has two handle ends, each of which is formed into a U-shaped slot. A slot that matches the shape of the U-shaped slot is formed on the outer peripheral surface of the sleeve assembly 19, and the U-shaped slot is snapped into the slot. In order to ensure the firmness of the U-shaped slot and the slot, the U-shaped slot and the slot are interference fit. When installing the electrode handle 18, it is only necessary to directly snap the U-shaped slot formed at the end of the handle into the slot of the sleeve assembly 19 to achieve the installation of the electrode handle 18, which is easy to install. In order to facilitate processing, two U-shaped slots are directly injection molded on the two handle ends of the electrode handle 18, and a slot that matches the U-shaped slot is directly injection molded on the components of the sleeve assembly 19. Compared with the traditional electrode handle 18, the electrode handle 18 and the sleeve assembly 19 of this scheme have a simpler structure, are more convenient to process, and are simpler and more convenient to install.

[0040] In a specific embodiment, continue to refer to Figure 5 The sleeve assembly 19 includes a first sleeve component 191 and a second sleeve component 192 that are movably connected; the outer sheath 16 is sleeved on the periphery of the guide tube 10, and the front end of the guide tube 10 can extend out of or retract into the outer sheath 16, and the rear end of the outer sheath 16 is fixedly connected to the first sleeve component 191, and the other end of the first electrode wire 11 and the other end of the second electrode wire 12 pass through the first sleeve component 191 and are fixedly connected to the plug cable through the second sleeve component 192; one handle end (first handle end 181) of the electrode handle 18 is connected to the first sleeve component 191, and the other handle end (second handle end 182) of the electrode handle 18 is connected to the second sleeve component 192. By manipulating the electrode handle 18, the first handle end 181 can drive the first sleeve component 191 to move axially relative to the second sleeve component 192, so that the front end of the guide tube 10 can extend out of or retract into the outer sheath 16.

[0041] Continue reading Figure 5 A snap-in position is injection molded on the first sleeve part 191 and the second sleeve part 192 respectively. The first handle end 181 and the second handle end 182 of the electrode handle 18 are respectively formed into a U-shaped slot. The U-shaped slot of the first handle end 181 is snapped into the snap-in position of the first sleeve part 191 to realize the connection between the first handle end 181 and the first sleeve part 191. The U-shaped slot of the second handle end 182 is snapped into the snap-in position of the second sleeve part 192 to realize the connection between the second handle end 182 and the second sleeve part 192.

[0042] Of course, the installation structure of the electrode handle 18 and the sleeve assembly 19 is not limited to the above specific definition, and the installation of the electrode handle 18 and the sleeve assembly 19 can also adopt a traditional installation structure.

[0043] To sum up, the radio frequency plasma ablation surgical electrode of the embodiment of the present invention is suitable for use with a radio frequency machine to complete endoscopic coagulation of bleeding points and a small range of flocculent tissue ablation, and is also suitable for use with a plasma device to complete endoscopic large-area, high-power ablation, thereby reducing the number of surgical electrodes used in the endoscopic fusion surgery process and meeting the sharing of radio frequency machines and plasma equipment, thereby reducing both the equipment procurement cost of the hospital and the treatment cost of the patients.

[0044] It should be noted that, in this article, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0045] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A radiofrequency plasma ablation surgical electrode, characterized in that: It comprises a guide tube (10), a first electrode wire (11), a second electrode wire (12), a first electrode head (13), a second electrode head (14) and an insulating sleeve (15); The first electrode wire (11) and the second electrode wire (12) are arranged in the guide tube (10), the first electrode head (13) and the second electrode head (14) are located at one end of the guide tube (10), one end of the first electrode wire (11) is connected to the first electrode head (13), and one end of the second electrode wire (12) is connected to the second electrode head (14); The second electrode head (14) is a hollow cylindrical structure with openings at both ends. The second electrode head (14) is sleeved on the periphery of the first electrode head (13), and one end of the first electrode head (13) is exposed outside the opening at one end of the second electrode head (14). The first electrode head (13) and the second electrode head (14) are separated by the insulating sleeve (15). An end surface of one end of the first electrode head (13) exposed outside an opening at one end of the second electrode head (14) is a conical plane; A step surface (152) is formed on the side surface of the front end portion of the insulating sleeve (15), and the second electrode head (14) is sleeved on the periphery of the insulating sleeve (15) and is located between the step surface (152) and the front end surface of the guide tube (10).

2. The radio frequency plasma ablation surgical electrode according to claim 1, characterized in that: The first electrode head (13) is formed into an umbrella-shaped electrode head with a large cross-sectional diameter at the front end and a small cross-sectional diameter at the rear end, and the front end surface of the first electrode head (13) is formed into the conical plane; A step hole (151) is formed on the insulating sleeve (15), the first electrode head (13) is located in the step hole (151), and the front end surface of the first electrode head (13) protrudes from the front end surface of the insulating sleeve (15).

3. The radio frequency plasma ablation surgical electrode according to claim 1, characterized in that: The front end of the insulating sleeve (15) is formed into a hollow truncated cone shape, and the cone angle of the truncated cone where the front end of the insulating sleeve (15) is located is smaller than the cone angle of the cone where the conical plane is located.

4. The radio frequency plasma ablation surgical electrode according to any one of claims 1 to 3, characterized in that: It also comprises an outer sheath tube (16), the guide tube (10) is inserted into the outer sheath tube (16), and the front end of the guide tube (10) can be extended out of or retracted into the outer sheath tube (16).

5. The radio frequency plasma ablation surgical electrode according to claim 4, characterized in that: The guide tube (10) is a flexible tube. A hard tube (17) is sleeved on a portion of the guide tube (10). The hard tube (17) is located inside the outer sheath tube (16). The distance between the front end of the hard tube (17) and the front end of the guide tube (10) is within a range of 10 mm to 15 mm.

6. The radio frequency plasma ablation surgical electrode according to claim 5, characterized in that: When the length of the tube section where the front end of the guide tube (10) protrudes out of the outer sheath tube (16) is at a maximum, the front end of the hard tube (17) is flush with the front end of the outer sheath tube (16).

7. The radio frequency plasma ablation surgical electrode according to any one of claims 1 to 3, characterized in that: It also includes a sleeve assembly (19) and an electrode handle (18), wherein the electrode handle (18) has two handle ends (181, 182), each of the handle ends is formed into a U-shaped slot, and a snap-in position matching the shape of the U-shaped slot is formed on the outer peripheral surface of the sleeve assembly (19), and the U-shaped slot is snapped into the snap-in position.

8. The radio frequency plasma ablation surgical electrode according to claim 7, characterized in that: The sleeve assembly (19) comprises a first sleeve component (191) and a second sleeve component (192) which are movably connected; The outer periphery of the guide tube (10) is provided with an outer sheath tube (16); the front end of the guide tube (10) can extend out of or retract into the outer sheath tube (16); the rear end of the outer sheath tube (16) is fixedly connected to the first sleeve component (191); the other end of the first electrode wire (11) and the other end of the second electrode wire (12) pass through the first sleeve component (191) and are fixedly connected to the plug cable through the second sleeve component (192); One handle end of the electrode handle (18) is connected to the first sleeve part (191), and the other handle end of the electrode handle (18) is connected to the second sleeve part (192).

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