Flexible radio frequency ablation electrode for anal fistula surgery with anti-adhesion and positioning mark

Abstract

The application discloses a flexible radio frequency ablation electrode for anal fistula surgery, which is anti-adhesion and provided with a positioning mark, and belongs to the technical field of medical devices. The metal electrode head is internally provided with a communication cavity and a mounting cavity, and the metal electrode head is provided with a liquid outlet hole in communication with the communication cavity. The temperature sensor is located in the mounting cavity. The two ends of the flexible pipe are respectively plugged with the metal electrode head and a connecting head, the flexible pipe is in communication with the communication cavity, and the flexible pipe is provided with a liquid injection port in communication therewith. The flexible pipe is provided with a through hole penetrating through an end wall thereof, and an elastic rod is inserted into the through hole. One end of a wire is fixedly connected with the metal electrode head, and lead wires of the temperature sensor and the wire are arranged on the inner side of the flexible pipe. The connecting head is provided with a threading hole one and a threading hole two, and the lead wires of the temperature sensor and the wire are electrically connected with a radio frequency generator after being closely threaded through the threading hole one and the threading hole two respectively. The metal electrode head can smoothly move in the fistula and will not be adhered to the fistula wall.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a flexible radiofrequency ablation electrode for anal fistula surgery that is non-adhesive and has a positioning mark. Background Technology

[0002] Anal fistulas mainly form after the rupture or incision and drainage of perianal abscesses. The fistula tracts are complex and tortuous, prone to recurrence, and severely impact patients' perianal health and quality of life. Radiofrequency ablation, with its advantages of minimal trauma, less bleeding, rapid postoperative recovery, and fewer complications, has become the mainstream minimally invasive method for treating anal fistulas in clinical practice. Its core principle is to release high-frequency radiofrequency energy through a radiofrequency ablation electrode, causing thermal coagulation, necrosis, and sloughing of the diseased tissue inside the fistula tract, ultimately achieving fistula closure and healing. The structural performance of the radiofrequency ablation electrode directly determines the safety, precision, and therapeutic effect of anal fistula treatment.

[0003] Currently used radiofrequency ablation electrodes for anal fistulas are mostly rigid or semi-flexible structures with simple overall designs, but they have several technical shortcomings in practical clinical applications. First, during high-temperature radiofrequency ablation, the electrode tip of existing ablation electrodes is prone to dry adhesion to the fistula mucosa and newly coagulated wound surface. This can easily tear the wound tissue during electrode advancement or retraction, leading to intraoperative bleeding and secondary damage to the perianal tissue. Furthermore, adhesions and blockages can prevent the electrode from flexibly entering and exiting the fistula, significantly increasing the difficulty of the procedure and affecting its smoothness. Second, the temperature detection structure of existing electrodes is poorly designed. Temperature sensors are often exposed or located far from the core ablation area. The local high temperature generated by radiofrequency ablation is easily affected by surrounding tissues and the operating environment, making it impossible to accurately collect the real-time temperature of the electrode tip and achieve precise temperature-controlled ablation. Temperature monitoring deviations can lead to excessively high local temperatures, causing thermal burns to normal perianal sphincter and mucosal tissue, or insufficient temperatures, resulting in incomplete ablation of the diseased tissue and causing fistula recurrence. Therefore, the safety and effectiveness of the treatment cannot be guaranteed. Finally, traditional radiofrequency ablation electrodes for anal fistulas lack precise positioning markers. When operating within the tortuous and varied fistula, medical staff cannot intuitively and accurately determine the insertion depth and specific location of the metal electrode tip. They rely entirely on clinical experience, which easily leads to ablation area deviation, missed ablation, or over-ablation. The electrodes have poor adaptability and are difficult to adapt to the treatment needs of complex fistulas with different patient routes.

[0004] Therefore, how to provide a flexible radiofrequency ablation electrode for anal fistula surgery that is non-adhesive and has a positioning mark, so as to overcome the above problems, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides a non-adhesive, positioning-marked flexible radiofrequency ablation electrode for anal fistula surgery, comprising a metal electrode head, a temperature sensor, a flexible tube, a connector, an elastic rod, and a wire. The metal electrode head has a communicating cavity and an installation cavity, and a fluid outlet communicating with the communicating cavity. The temperature sensor is disposed within the installation cavity. The two ends of the flexible tube are respectively fixed and sealed to the metal electrode head and the connector, and the flexible tube communicates with the interior of the communicating cavity. An injection port communicating with the interior of the flexible tube is provided on it. The flexible tube has multiple positioning marks on its wall, arranged sequentially along its length. A through-hole penetrates its end wall, and the elastic rod is tightly inserted into the through-hole. One end of the wire is fixed and electrically connected to the metal electrode head. The lead wire of the temperature sensor and the wire are both arranged inside the flexible tube. The connector has a first through-hole and a second through-hole. The lead wire of the temperature sensor and the wire are electrically connected to the radio frequency generator after passing tightly through the first and second through-holes, respectively.

[0006] Preferably, the metal electrode head includes a metal shell and a metal connector. The metal shell includes a hemispherical cover and a straight tube. The open end of the hemispherical cover is sealed and fixed to one end of the straight tube. The straight tube has a liquid outlet hole on its side wall. The metal connector includes an abutment plate, a conduit, and an annular plug. The abutment plate is tightly arranged inside the straight tube, and the surface of the abutment plate is perpendicular to the center line of the straight tube. The area defined by the hemispherical cover and the abutment plate is the mounting cavity. The temperature sensor is in close contact with the inner wall of the hemispherical cover, and the side surface of the abutment plate near the hemispherical cover is in close contact with the temperature sensor. One end of the conduit is coaxially arranged inside the straight tube. The outer wall of the conduit and the inner wall of the straight tube have a water-permeable gap. One end of the conduit is connected to the abutment plate... The connecting plate is sealed and fixed. The other end of the conduit is located inside the flexible tube. The abutment plate has a clearance hole located inside the conduit. The lead wire of the temperature sensor is arranged inside both the clearance hole and the conduit. The conduit is filled with waterproof material. One end of the lead wire is fixed to the conduit and electrically connected. The annular plug is coaxially sealed and fixed to the conduit. The end of the straight tube away from the hemispherical cover is sealed and fixed with the annular plug. The annular plug has a liquid permeation hole that communicates with the water permeability gap. The area defined by the abutment plate, the inner wall of the straight tube, and the annular plug is the communicating cavity. The end of the flexible tube away from the connector is sealed and fixed to the annular plug. The liquid permeation hole communicates with the flexible tube.

[0007] Preferably, the metal connector further includes a first insertion tube, which is fixed to the annular plug. The end of the conduit away from the abutment plate, the wire, and the liquid permeation hole are all arranged inside the first insertion tube. Multiple liquid permeation holes are provided, and the multiple liquid permeation holes are evenly arranged along the circumference of the annular plug. The first insertion tube is tightly inserted into one end of the flexible tube, and an annular protrusion is coaxially provided on the outer side wall of the first insertion tube.

[0008] Preferably, the annular plug is provided with a plurality of blind connection holes, which are evenly arranged along the circumference of the annular plug. The flexible tube is provided with a plurality of through holes, and an elastic rod is inserted into each through hole. One end of each of the multiple elastic rods is tightly inserted into the multiple blind connection holes.

[0009] Preferably, the connector head has multiple blind holes, and one end of each of the multiple elastic rods is tightly inserted into the multiple blind holes.

[0010] Preferably, the outer diameter of the straight tube is the same as the outer diameter of the hemispherical cover, and multiple strip-shaped protrusions are integrally formed evenly distributed on the outer side wall of the straight tube. The length direction of the strip-shaped protrusions is the same as the length direction of the straight tube, and an outlet hole is arranged between every two adjacent strip-shaped protrusions along the circumference of the straight tube.

[0011] Preferably, the outer side wall of the flexible tube is provided with a plurality of liquid guiding grooves, which are arranged along the length of the flexible tube, and the plurality of liquid outlet holes and the plurality of liquid guiding grooves are respectively positioned along the length of the straight tube.

[0012] Preferably, the connector head is integrally formed with a second insertion tube, the first threading hole and the second threading hole are arranged inside the second insertion tube, the second insertion tube is tightly inserted into one end of the flexible tube, and the outer side wall of the second insertion tube is coaxially provided with a second annular protrusion.

[0013] Preferably, the plurality of positioning marks are arranged equidistantly along the length of the flexible tube.

[0014] The advantages and positive effects of the non-adhesive, positioning-marked flexible radiofrequency ablation electrode for anal fistula surgery described in this invention are as follows: 1. Staff inject liquid into the flexible tube through the injection port. The liquid in the flexible tube can enter the connecting cavity and exit from the liquid outlet on the metal electrode head. When the metal electrode head enters and exits the fistula and during ablation treatment, the metal electrode head will not adhere to the mucosa inside the fistula. While ensuring the treatment effect, the metal electrode head can flexibly enter and exit the fistula.

[0015] 2. The hemispherical cover design ensures that it can move in and out of the fistula flexibly with low resistance, and at the same time, the hemispherical cover will not scratch the fistula.

[0016] 3. The temperature sensor is located in the mounting cavity, i.e., inside the hemispherical cover, and is in close contact with the inner wall of the hemispherical cover. The hemispherical cover is the core component of ablation therapy, while the liquid outlet is located on the straight tube. During ablation therapy, the temperature sensor can accurately measure the temperature, and the influence of the liquid outlet on the temperature measurement is almost negligible.

[0017] 4. A through hole is made in the wall of the flexible tube, and the elastic rod is tightly inserted into the through hole. This design enables the flexible tube to have a certain degree of elasticity, ensuring that the metal electrode head can be smoothly pushed into the fistula.

[0018] 5. By designing positioning marks, the position of the metal electrode head within the fistula can be confirmed through these marks.

[0019] 6. By designing a connector, which works in conjunction with the metal electrode head to seal the end of the flexible tube, the liquid injected from the injection port can only be discharged from the outlet hole; at the same time, the wires connected to the metal electrode head and the leads of the temperature sensor can also be reliably arranged.

[0020] 7. By designing the abutment plate, conduit, and annular plug, on the one hand, a connecting cavity and an installation cavity can be formed, and the installation cavity and the connecting cavity are isolated from each other, that is, the liquid in the connecting cavity will not enter the installation cavity; the abutment plate can press against the temperature sensor to ensure that the temperature sensor can be pressed against the inner wall of the hemispherical cover; the straight pipe can be reliably connected to the flexible pipe through the annular plug.

[0021] 8. By designing tube one, tube two, connecting blind hole one, and connecting blind hole two, the flexible tube can be reliably connected to the annular plug and the connector, and the elastic rod will not rotate relative to the annular plug or the connector.

[0022] 9. Multiple elastic rods are evenly installed on the flexible tube, which can ensure smooth fluid flow even when the flexible tube is bent.

[0023] 10. By designing strip-shaped protrusions, the outlet hole will not be blocked by the fistula wall, making it easy for fluid to drain.

[0024] 11. By designing a liquid guiding groove, when the liquid output from the outlet hole is large, excess liquid can be discharged out of the fistula along the liquid guiding groove. Attached Figure Description

[0025] Figure 1 This is an overall isometric view of the present invention; Figure 2 This is a partial isometric view of the present invention; Figure 3 The local explosion isometric of the present invention Figure 1 ; Figure 4 The local explosion isometric of the present invention Figure 2 ; Figure 5 The local explosion isometric of the present invention Figure 3 ; Figure 6 This is a partial isometric sectional view of the present invention.

[0026] Figure Labels 1. Hemispherical cover; 2. Straight tube; 20. Liquid outlet; 21. Strip-shaped protrusion; 22. Annular groove; 3. Abutment plate; 30. Clearance hole; 31. Annular protrusion; 4. Through-tube; 5. Annular plug; 50. Liquid permeation hole; 51. Connection blind hole one; 6. Insertion tube one; 60. Annular protrusion one; 7. Temperature sensor; 8. Flexible tube; 80. Liquid injection port; 81. Positioning mark; 82. Liquid guide groove; 9. Connector; 90. Through-hole one; 91. Through-hole two; 92. Insertion tube two; 920. Annular protrusion two; 93. Connection blind hole two; 10. Elastic rod; 11. Wire. Detailed Implementation

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention 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. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. In case of any inconsistency, the meaning set forth in this specification or derived from the content described herein shall prevail. Furthermore, the terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit the scope of this application.

[0029] See appendix Figure 1-6This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. Specifically, the present invention discloses a flexible radiofrequency ablation electrode for anal fistula surgery that is anti-adhesive and has a positioning mark, including a metal electrode head, a temperature sensor 7, a flexible tube 8, a connector 9, an elastic rod 10, and a wire 11. The metal electrode head has a communicating cavity and an installation cavity, and a liquid outlet 20 communicating with the communicating cavity is provided on the metal electrode head, allowing liquid in the communicating cavity to flow out from the liquid outlet 20. The temperature sensor 7 is closely arranged in the installation cavity, and the temperature sensor 7 can monitor the temperature of the metal electrode head. The two ends of the transparent and insulated flexible tube 8 are respectively fixed and sealed with metal electrode heads and connectors 9. The flexible tube 8 is connected to the interior of the connecting cavity. The flexible tube 8 is provided with an injection port 80 that is connected to its interior. One end of the liquid addition tube is fixed and connected to the injection port 80, and the other end of the liquid addition tube is connected to the inlet and outlet of the syringe. The user can push liquid into the flexible tube 8 and the connecting cavity through the syringe. The liquid here is 0.9% sterile medical saline. On the one hand, the small amount of liquid flowing out from the outlet hole 20 can lubricate the metal electrode head, reduce the friction between the metal electrode head and the fistula, facilitate the advancement of the metal electrode head along the fistula, and avoid puncturing the fistula and accidentally injuring the sphincter. On the other hand, the liquid flowing out of the outlet hole 20 can moisten the metal electrode head and cool the local area. During radiofrequency operation, there will be local high temperature. The dry metal electrode head is easy to coagulate and stick to the fistula mucosa. When the metal electrode head is withdrawn, it is easy to tear the newly coagulated wound, which can lead to bleeding. The above-mentioned liquid can prevent the metal electrode head from directly sticking to the tissue. At the same time, the small amount of liquid discharged from the outlet hole 20 can remove the instantaneous high temperature on the surface of the metal electrode head and reduce the probability of thermal damage to the surrounding normal perianal tissue.

[0030] Multiple positioning marks 81 are printed on the inner wall of the flexible tube 8. The multiple positioning marks 81 are arranged at equal intervals along the length of the flexible tube 8. The user can determine the position of the metal electrode head in the fistula by referring to the positioning marks 81.

[0031] The flexible tube 8 has a through hole penetrating its end wall, and the metal elastic rod 10 is tightly inserted into the through hole. The elastic rod 10 can give the flexible tube 8 a certain elasticity, so that the metal electrode head and the flexible tube 8 can be smoothly advanced in the fistula.

[0032] One end of the wire 11 is fixed and electrically connected to the metal electrode head. The leads of the temperature sensor 7 and the wire 11 are both arranged inside the flexible tube 8. The connector 9 is provided with a first wire hole 90 and a second wire hole 91. After the leads of the temperature sensor 7 and the wire 11 pass tightly through the first wire hole 90 and the second wire hole 91, they are electrically connected to the radio frequency generator. The connector 9 can seal and fix the end of the flexible tube 8, and the liquid inside the flexible tube 8 will not leak out from the first wire hole 90 and the second wire hole 91.

[0033] More specifically, the metal electrode head includes a metal shell and a metal connector. The metal shell includes a hemispherical cover 1 and a straight tube 2. The open end of the hemispherical cover 1 is sealed and fixed to one end of the straight tube 2. The straight tube 2 has a liquid outlet hole 20 on its side wall. The hemispherical cover 1 and the straight tube 2 are in direct contact with the inner wall of the fistula. The hemispherical cover 1 will not scratch the fistula wall and is easy to advance or retract.

[0034] The metal connector includes an abutment plate 3, a conduit 4, and an annular plug 5. The circular abutment plate 3 is tightly arranged inside the straight pipe 2. The surface of the abutment plate 3 is perpendicular to the center line of the straight pipe 2. The outer wall of the abutment plate 3 is integrally formed with an annular protrusion 31. The inner wall of the straight pipe 2 is provided with an annular groove 22. The annular protrusion 31 can be tightly embedded in the annular groove 22, thereby ensuring that the liquid will not leak from between the abutment plate 3 and the straight pipe 2. The area defined by the hemispherical cover 1 and the abutment plate 3 is the mounting cavity. The temperature sensor 7 is in close contact with the inner wall of the hemispherical cover 1. The side of the abutment plate 3 closest to the hemispherical cover 1 is in close contact with the temperature sensor 7. The temperature sensor 7 is close to the inner wall of the hemispherical cover 1, thereby ensuring that the temperature sensor 7 can accurately measure the temperature of the hemispherical cover 1. One end of the conduit 4 is coaxially arranged inside the straight pipe 2. The outer wall of the conduit 4 and the inner wall of the straight pipe 2 have an annular water-permeable gap. One end of the conduit 4 is sealed and fixed to the abutment plate 3. The other end of the conduit 4 is located inside the flexible pipe 8. The abutment plate 3 is provided with a circular clearance hole 30, which is located inside the conduit 4. The lead wire of the temperature sensor 7 is arranged inside both the clearance hole 30 and the conduit 4. The conduit 4 is filled with waterproof material. In this embodiment, the waterproof material is epoxy resin. The waterproof material can prevent liquid in the flexible pipe 8 from entering the installation cavity. One end of the wire 11 is fixed to the conduit 4 and electrically connected. An annular plug 5 is coaxially and sealed to the conduit 4. The end of the straight pipe 2 away from the hemispherical cover 1 is sealed with the annular plug 5 via a threaded connection. The annular plug 5 has a circular liquid-permeable hole 50, which communicates with the water-permeable gap. The area defined by the abutment plate 3, the inner wall of the straight pipe 2, and the annular plug 5 forms a communicating cavity. The end of the flexible pipe 8 away from the connector 9 is sealed to the annular plug 5. The liquid-permeable hole 50 communicates with the flexible pipe 8, allowing liquid in the flexible pipe 8 to enter the communicating cavity through the liquid-permeable hole 50.

[0035] More specifically, the metal connector also includes a tube 6, which is fixed to the annular plug 5. The end of the conduit 4 away from the abutment plate 3, the wire 11, and the liquid permeation holes 50 are all arranged inside the tube 6. Multiple liquid permeation holes 50 are provided, evenly arranged along the circumference of the annular plug 5. The tube 6 is tightly inserted into one end of the flexible tube 8. The outer wall of the tube 6 has a coaxial annular protrusion 60, allowing the flexible tube 8 to be reliably inserted and sealed with the tube 6.

[0036] More specifically, the connector 9 has an integrally formed insert tube 92, and a wire hole 90 and a wire hole 91 are arranged inside the insert tube 92. The insert tube 92 is tightly inserted into one end of the flexible tube 8. The outer wall of the insert tube 92 is coaxially provided with an annular protrusion 920. The flexible tube 8 can be reliably inserted and sealed with the insert tube 92.

[0037] The annular plug 5 has multiple blind connection holes 51, which are evenly arranged around the circumference of the annular plug 5. The flexible tube 8 has multiple through holes evenly arranged, and an elastic rod 10 is inserted into each through hole. One end of each elastic rod 10 is tightly inserted into one of the multiple blind connection holes 51. By designing the blind connection holes 51, the annular plug 5 and the elastic rod 10 can be reliably connected, the insert tube 6 and the flexible tube 8 will not easily separate, and there will be no relative rotation between the flexible tube 8 and the insert tube 6.

[0038] The connector 9 has multiple blind holes 93. One end of each of the multiple elastic rods 10 is tightly inserted into the multiple blind holes 93. By designing the blind holes 93, the connector 9 and the elastic rods 10 can be reliably connected. The insertion tube 92 and the flexible tube 8 will not easily separate. In addition, there will be no relative rotation between the flexible tube 8 and the insertion tube 92.

[0039] The outer diameter of the straight tube 2 is the same as that of the hemispherical cover 1, ensuring that the straight tube 2 and the hemispherical cover 1 can move smoothly within the fistula without scratching it. Multiple integrally formed strip-shaped protrusions 21 are evenly distributed on the outer wall of the straight tube 2. The length direction of the strip-shaped protrusions 21 is the same as the length direction of the straight tube 2. A fluid outlet hole 20 is arranged between every two adjacent strip-shaped protrusions 21 along the circumference of the straight tube 2. The purpose of the strip-shaped protrusions 21 is to ensure that the fluid outlet hole 20 does not adhere tightly to the fistula wall, facilitating the drainage of fluid from the fluid outlet hole 20.

[0040] Multiple fluid guide grooves 82 are evenly distributed on the outer wall of the flexible tube 8. The fluid guide grooves 82 are arranged along the length of the flexible tube 8. Multiple fluid outlet holes 20 are located along the length of the straight tube 2 and correspond to the positions of the multiple fluid guide grooves 82. The purpose of the fluid guide grooves 82 is to ensure that when the fluid outflow from the fluid outlet hole 20 increases, the fluid between the fistula and the flexible tube 8 can flow out of the fistula along the fluid guide grooves 82, thus avoiding excessive fluid outflow from the fluid outlet hole 20 from affecting the radiofrequency ablation treatment effect.

[0041] When using this flexible radiofrequency ablation electrode: The first step is preoperative preparation, which includes preoperative examinations, bowel preparation, anesthesia, and equipment preparation for the patient.

[0042] Secondly, the internal opening is exposed using an anoscope. A fistula probe is inserted from the external opening and then passed through the fistula tract from the internal opening to determine the direction of the fistula tract before the fistula probe is withdrawn.

[0043] Next, the metal electrode head and the flexible tube 8 connected to it are inserted from the external opening along the fistula to the internal opening of the anal fistula. The depth of the fistula is confirmed by referring to the positioning mark 81. During this process, medical staff manually inject liquid into the communicating cavity using a syringe. A small amount of liquid will flow out from the liquid outlet 20 to ensure that the metal electrode head is smoothly advanced.

[0044] Finally, the radiofrequency generator is turned on, and the radiofrequency control switch is pressed. The metal electrode tip begins targeted ablation. After a certain ablation time, the flexible tube 8 is slowly and evenly retracted a certain length, ablating the fistula wall segment by segment from the inner opening to the outer opening. Before each retraction of the flexible tube 8, medical staff manually inject liquid into the connecting cavity using a syringe. A small amount of liquid will flow out from the outlet hole 20 to ensure that the metal electrode tip can be retracted smoothly and will not adhere to the fistula mucosa.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A flexible radiofrequency ablation electrode for anal fistula surgery that is non-adhesive and has a positioning marker, characterized in that, The device includes a metal electrode head, a temperature sensor, a flexible tube, a connector, an elastic rod, and a wire. The metal electrode head has a communicating cavity and a mounting cavity, and a liquid outlet hole communicating with the communicating cavity. The temperature sensor is arranged in the mounting cavity. The two ends of the flexible tube are fixed and sealed with the metal electrode head and the connector, respectively. The flexible tube communicates with the interior of the communicating cavity and has a liquid injection port communicating with its interior. The flexible tube has multiple positioning marks on its wall, arranged sequentially along the length of the flexible tube. The flexible tube has a through hole penetrating its end wall, and the elastic rod is tightly inserted into the through hole. One end of the wire is fixed and electrically connected to the metal electrode head. The lead of the temperature sensor and the wire are both arranged inside the flexible tube. The connector has a first wire hole and a second wire hole. The lead of the temperature sensor and the wire are electrically connected to the radio frequency generator after tightly passing through the first wire hole and the second wire hole, respectively.

2. The flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 1, characterized in that, The metal electrode head includes a metal shell and a metal connector. The metal shell includes a hemispherical cover and a straight tube. The open end of the hemispherical cover is sealed and fixed to one end of the straight tube. The straight tube has a liquid outlet hole on its side wall. The metal connector includes an abutment plate, a conduit, and an annular plug. The abutment plate is tightly arranged inside the straight tube, and its surface is perpendicular to the center line of the straight tube. The area defined by the hemispherical cover and the abutment plate is the mounting cavity. The temperature sensor is in close contact with the inner wall of the hemispherical cover, and the side of the abutment plate closest to the hemispherical cover is in close contact with the temperature sensor. One end of the conduit is coaxially arranged inside the straight tube. The outer wall of the conduit and the inner wall of the straight tube have a water-permeable gap. One end of the conduit is connected to the abutment plate. The conduit is sealed and fixed, with the other end of the conduit located inside the flexible tube. A clearance hole is provided on the abutment plate inside the conduit. Leads of the temperature sensor are arranged inside both the clearance hole and the conduit. The conduit is filled with waterproof material. One end of the lead wire is fixed to and electrically connected to the conduit. An annular plug is coaxially and sealed to the conduit. The end of the straight tube away from the hemispherical cover is sealed and fixed with the annular plug. A liquid-permeable hole is provided on the annular plug, communicating with the water-permeable gap. The area defined by the abutment plate, the inner wall of the straight tube, and the annular plug constitutes the communicating cavity. The end of the flexible tube away from the connector is sealed and fixed to the annular plug, and the liquid-permeable hole communicates with the flexible tube.

3. The flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 2, characterized in that, The metal connector also includes a first insertion tube, which is fixed to the annular plug. The end of the conduit away from the abutment plate, the wire, and the liquid permeation hole are all arranged inside the first insertion tube. Multiple liquid permeation holes are provided, and the multiple liquid permeation holes are evenly arranged along the circumference of the annular plug. The first insertion tube is tightly inserted into one end of the flexible tube, and an annular protrusion is coaxially provided on the outer side wall of the first insertion tube.

4. The flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 2, characterized in that, The annular plug is provided with a plurality of blind holes, which are evenly arranged along the circumference of the annular plug. The flexible tube is provided with a plurality of through holes, and an elastic rod is inserted into each through hole. One end of each elastic rod is tightly inserted into one of the multiple blind holes.

5. The flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 4, characterized in that, The connector head has multiple blind holes, and one end of each of the multiple elastic rods is tightly inserted into the multiple blind holes.

6. The flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 2, characterized in that, The outer diameter of the straight tube is the same as the outer diameter of the hemispherical cover. Multiple strip-shaped protrusions are integrally formed and evenly distributed on the outer wall of the straight tube. The length direction of the strip-shaped protrusions is the same as the length direction of the straight tube. A liquid outlet hole is arranged between every two adjacent strip-shaped protrusions along the circumference of the straight tube.

7. A flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 2, characterized in that, The flexible tube has multiple liquid guiding grooves evenly distributed on its outer side wall. The liquid guiding grooves are arranged along the length of the flexible tube, and the multiple liquid outlet holes and the multiple liquid guiding grooves are respectively positioned along the length of the straight tube.

8. The non-adhesive, flexible radiofrequency ablation electrode for anal fistula surgery with positioning markings according to claim 2, characterized in that, The connector head has an integrally formed insertion tube two. The first wire hole and the second wire hole are arranged inside the insertion tube two. The insertion tube two is tightly inserted into one end of the flexible tube. The outer side wall of the insertion tube two is coaxially provided with annular protrusion two.

9. A flexible radiofrequency ablation electrode for anal fistula surgery with anti-adhesion and positioning marking as described in claim 1, characterized in that, The multiple positioning marks are arranged equidistantly along the length of the flexible tube.

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