A flexible ablation electrode
By designing a combined structure of bendable ablation electrode, the problem of inconvenience in operation of the ablation electrode when delivered to the lesion position is solved, achieving higher operating safety and flexibility in use.
Patent Information
- Application Number
- CN202411168003.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2044-08-23
AI Technical Summary
Existing ablation electrodes are susceptible to blockage from other tissues when delivered to the lesion site, resulting in inconvenient operation and inflexible use.
A bendable ablation electrode is designed, and by setting a bendable section and bending control device on the tool tube and the tool head, the combined structure of the pulling wire and the guide groove can achieve flexible movement and precise control of the tool head.
Improves the operational safety and flexibility of the ablation electrode, ensuring that the blade can reach the lesion position accurately, reducing the complexity and risk of the operation.
Smart Images
Figure CN118680661B_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of medical devices, and in particular to a bendable ablation electrode. Background Art
[0002] In recent years, low-temperature plasma ablation electrodes have been widely used in the treatment of otolaryngology, cervical spine, lumbar spine and other diseases, and have been proven to have good effects. They are characterized by high safety, short operation time, small trauma and quick effect. The basic principle is to use specific electrical energy through the blade electrode to stimulate the conductive medium (sodium chloride solution) in the blood, mucosa and nucleus pulposus tissue in the human body to form a highly concentrated plasma area around the electrode, and use the kinetic energy of high-speed moving ions in the plasma to directly break the molecular bonds, so that the target protein is gasified and decomposed into CO, NO2, etc., to achieve the purpose of tissue cutting, ablation, hemostasis, etc.
[0003] Due to the influence of the human body's own structure and the location of the lesion tissue, the ablation electrode will be blocked by other tissues during delivery to the lesion location, and the blade of the conventional ablation electrode cannot be accurately pushed to the lesion location. There are problems such as inconvenient operation and inflexible use of the ablation electrode. To solve this problem, a bendable ablation electrode came into being. However, technicians in this field still need to continuously improve and develop safer and more reliable bendable ablation electrodes. Summary of the invention
[0004] The present application provides a safe and reliable bendable ablation electrode.
[0005] The embodiment of the present application provides a bendable ablation electrode, comprising:
[0006] Knife tube;
[0007] emitter;
[0008] A bendable section, wherein the bendable section is arranged at one end of the knife tube, a knife head is arranged at the end of the bendable section, and the emitter is fixedly mounted at the end of the knife head;
[0009] The other end of the knife tube is provided with a control handle for driving the bendable section to bend so as to drive the knife head to move;
[0010] A first pull wire and a second pull wire extending in the knife tube, the first pull wire and the second pull wire are both fixedly connected to a bending control device in the control handle, one end of the first pull wire and one end of the second pull wire are both fixedly connected to the knife head, and the bending control device pulls the first pull wire and the second pull wire to control the bending of the bendable section to drive the knife head to move;
[0011] At least two first guide grooves are provided on the shell of the cutter head, each of the first guide grooves includes two first notches and a second notch extending along the circumference of the cutter head, and a first blocking wall formed by a part of the shell of the cutter head is located between the first notch and the second notch. The first pull wire passes through the first notch of one of the first guide grooves and is pressed on the outer side of the first blocking wall, and then passes through the cutter head from the second notch. The second pull wire passes through the first notch of another first guide groove and is pressed on the outer side of the first blocking wall, and then passes through the cutter head from the second notch. The first pull wire and the second pull wire pass through different first guide grooves respectively.
[0012] A first stopper is fixedly sleeved on one end of the first pull wire that is fixedly connected to the cutter head, the first stopper is located on a side of the first guide groove away from the control handle, and the first stopper can be blocked by the first guide groove;
[0013] A second stopper is fixedly sleeved on one end of the second pull wire fixedly connected to the cutter head. The second stopper is located on a side of the first guide groove away from the control handle, and the second stopper can be blocked by the first guide groove.
[0014] Compared with the prior art, the bendable ablation electrode of the present application is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of a bendable ablation electrode provided in an embodiment of the present application.
[0016] Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle.
[0017] Figure 3 yes Figure 1 A schematic diagram of a cross-sectional structure of a flexible ablation electrode.
[0018] Figure 4 yes Figure 3 A magnified schematic diagram of area B.
[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of another flexible ablation electrode provided in an embodiment of the present application.
[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of another flexible ablation electrode provided in an embodiment of the present application.
[0021] Explanation of the accompanying drawings: 1. knife tube; 11. second guide groove; 111. third notch; 112. fourth notch; 113. second blocking wall; 2. emitter; 3. bendable section; 31. third guide groove; 311. fifth notch; 312. sixth notch; 313. third blocking wall; 4. knife head; 41. first guide groove; 411. first notch; 412. second notch; 413. first blocking wall; 42. first block; 43. second block; 5. control handle; 51. first pull wire; 52. second pull wire; 53. bending control device; 6. insulating base. DETAILED DESCRIPTION
[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.
[0023] In the description of the present application, it should be noted that the terms "inside", "outside", "upper side", "lower side", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0026] The present application is further described in detail below in conjunction with the accompanying drawings.
[0027] Reference Figure 1-Figure 4 As shown, Figure 1 is a schematic diagram of the structure of a bendable ablation electrode provided in an embodiment of the present application, Figure 2 yes Figure 1 A magnified schematic diagram of area A in the middle. Figure 3 yes Figure 1 A schematic diagram of a cross-sectional structure, Figure 4 yes Figure 3 The enlarged schematic diagram of the B area in the middle. The bendable ablation electrode of this embodiment includes a control handle 5, a knife tube 1 mounted on the control handle 5, a bendable section 3 arranged at the end of the knife tube 1 away from the control handle 5, a knife head 4 arranged at the end of the bendable section 3 away from the control handle 5, an emitter 2 fixedly mounted at the end of the knife head 4 away from the control handle 5, a bending control device 53 arranged in the control handle 5, and a first pull wire 51 and a second pull wire 52 connected between the control handle 5 and the knife head 4. The knife tube 1 is a hollow straight tube, the first pull wire 51 and the second pull wire 52 extend in the knife tube 1 along the axial direction of the knife tube 1, the bending control device 53 is fixedly connected to the first pull wire 51 and the second pull wire 52, the end of the first pull wire 51 away from the control handle 5 and the end of the second pull wire 52 away from the control handle 5 are fixedly connected to the knife head 4, and the bending control device 53 pulls the first pull wire 51 and the second pull wire 52 to control the bending of the bendable section 3 to drive the knife head 4 to move. The cutter head 4 is also a hollow straight tube, and one end of the first pull wire 51 and one end of the second pull wire 52 are fixed at different positions on the inner wall of the shell of the cutter head 4. The bendable section 3 is a hollow structure, and the first pull wire 51 and the second pull wire 52 are inserted into the bendable section 3, the cutter tube 1 and the control handle 5.
[0028] In addition, two first guide grooves 41 are provided on the shell of the cutter head 4. Each first guide groove 41 includes two first notches 411 and a second notch 412 extending along the circumference of the cutter head 4. A first blocking wall 413 formed by a part of the shell of the cutter head 4 is located between the first notches 411 and the second notches 412. The first pull wire 51 passes through the first notch 411 of one of the first guide grooves 41 and is pressed on the outer side of the first blocking wall 413, and then passes into the cutter head 4 from the second notch 412. The outer side of the first blocking wall 413 is the side away from the cavity of the cutter head 4; the second pull wire 52 passes through the first notch 411 of another first guide groove 41 and is pressed on the outer side of the first blocking wall 413, and then passes into the cutter head 4 from the second notch 412. The first pull wire 51 and the second pull wire 52 pass through different first guide grooves 41, respectively. In this embodiment, the two first guide grooves 41 are located on opposite sides of the cutter head 4 and are symmetrically distributed about the axis of the knife tube 1. One of the first guide grooves 41 is close to the end of the first pull wire 51, and the other first guide groove 41 is close to the end of the second pull wire 52. The end of the first pull wire 51 and the end of the second pull wire 52 are both fixed to the inner wall of the shell of the cutter head 4. The embodiment of the present application makes a clever design on the shell of the cutter head 4, and directly uses the shell of the cutter head 4 to make the first guide groove 41 for the first pull wire 51 and the second pull wire 52 to pass through, so that the extension direction of the first pull wire 51 and the second pull wire 52 is closer to the axial direction of the knife tube 1 and closer to the inner wall of the shell of the cutter head 4.
[0029] It should be noted that, in other embodiments, the number of the first guide grooves 41 may be more than 3 (including 3). Preferably, the sizes of the first guide grooves 41 are the same, but they may also be different. For example, the lengths or widths of the first notches 411 (or the second notches 412) between different first guide grooves 41 may be different, and the widths of the first blocking walls 413 may be different. In the present application, there is no specific limitation on the number and size of the first guide grooves 41. In addition, the first pull wire 51 and the second pull wire 52 are preferably made of metal, and may also be made of flexible wires made of polymer materials.
[0030] In this embodiment, a first stopper 42 is fixedly sleeved on one end of the first pull wire 51 fixedly connected to the cutter head 4, and the first stopper 42 is located on the side of the first guide groove 41 away from the control handle 5, and the first stopper 42 can be blocked by the first guide groove 41. That is to say, a first stopper 42 is fixedly sleeved on the first pull wire 51, and the position of the first stopper 42 is located between the end of the first pull wire 51 fixed on the inner wall of the shell of the cutter head 4 and the first guide groove 41. And the first guide groove 41 can prevent the first stopper 42 from escaping from the first notch 411 and the second notch 412; similarly, a second stopper 43 is fixedly sleeved on one end of the second pull wire 52 fixedly connected to the cutter head 4, and the second stopper 43 is located on the side of the first guide groove 41 away from the control handle 5, and the second stopper 43 can be blocked by the first guide groove 41. That is to say, a second stopper 43 is fixedly sleeved on the second pull wire 52, and the position of the second stopper 43 is located between the end of the second pull wire 52 fixed on the inner wall of the shell of the cutter head 4 and the first guide groove 41. And the first guide groove 41 can prevent the second stopper 43 from escaping from the first notch 411 and the second notch 412.
[0031] In this embodiment, the first stopper 42 and the second stopper 43 are preferably hollow cylinders. Preferably, the first pull wire 51, the second pull wire 52, the cutter head 4, the first stopper 42 and the second stopper 43 are all made of metal. The end of the first pull wire 51 close to the cutter head 4 is welded and fixed to the inner wall of the shell of the cutter head 4. At the same time, the first pull wire 51 is also welded and fixed to the first stopper 42, and the first stopper 42 is welded and fixed to the inner wall of the shell of the cutter head 4; the end of the second pull wire 52 close to the cutter head 4 is welded and fixed to the inner wall of the shell of the cutter head 4. At the same time, the second pull wire 52 is also welded and fixed to the second stopper 43, and the second stopper 43 is welded and fixed to the inner wall of the shell of the cutter head 4. The setting of the first stopper 42 and the second stopper 43 can prevent one end of the first pull wire 51 or (and) one end of the second pull wire 52 from falling off and separating from the inner wall of the shell of the cutter head 4, and thus being unable to control the bending of the bendable section 3. Because the first pull wire 51 is fixed on the first stopper 42, when the first pull wire 51 is pulled, the first stopper 42 is blocked by the first guide groove 41, so the first pull wire 51 can still be retracted and released, thereby driving the bendable section 3 to bend or straighten. Similarly, the second pull wire 52 is fixed on the second stopper 43, when the second pull wire 52 is pulled, the second stopper 43 is blocked by the first guide groove 41, so the first pull wire 51 can still be retracted and released, thereby driving the bendable section 3 to bend or straighten. The first stopper 42 and the second stopper 43 play a double insurance role.
[0032] It should be noted that, in other embodiments, the first stopper 42 and the second stopper 43 may also be a hollow cuboid, a hollow cube or other shapes, which is not specifically limited in the present application. The first stopper 42 and the second stopper 43 may not be fixed on the cutter head. The first pull wire 51 and the second pull wire 52 may also be flexible wires made of polymer materials. The first pull wire 51 may be fixed to the first stopper 42 by winding and knotting, and the second pull wire 52 may also be fixed to the second stopper 43 by winding and knotting. In addition, the first pull wire 51 may be fixed to the cutter head 4 by winding and knotting on the first blocking wall 413 of the first guide groove 41, and the second pull wire 52 may also be fixed to the cutter head 4 by winding and knotting on the first blocking wall 413 of the first guide groove 41.
[0033] Reference Figure 5 As shown, Figure 5 FIG. 1 is a schematic cross-sectional view of another flexible ablation electrode provided in an embodiment of the present application. Figure 3On the basis of the bendable ablation electrode shown, four second guide grooves 11 are provided on the shell of the knife tube 1. Each second guide groove 11 includes two third notches 111 and a fourth notch 112 extending along the circumference of the knife tube 1. Between the third notch 111 and the fourth notch 112 is a second blocking wall 113 formed by a part of the shell of the knife tube 1. The first pull wire 51 passes through the third notch 111 of one of the second guide grooves 11 and then presses on the outer side of the second blocking wall 113, and then passes into the knife tube 1 from the fourth notch 112. The outer side of the second blocking wall 113 is the side away from the cavity of the knife tube 1. In the same way, the first pull wire 51 passes through two second guide grooves 11 in a straight line. Similarly, the second pull wire 52 passes through the third notch 111 of another second guide groove 11 and then presses on the outer side of the second blocking wall 113, and then passes into the knife tube 1 from the fourth notch 112. The second pull wire 52 passes through the other two second guide grooves 11 in a straight line. That is to say, in this embodiment, both the first pull wire 51 and the second pull wire 52 pass through two second guide grooves 11. The embodiment of the present application is cleverly designed on the shell of the knife tube 1, and four second guide grooves 11 are made directly using the shell of the knife tube 1, so that the first pull wire 51 and the second pull wire 52 pass through different second guide grooves 11 respectively, so that the first pull wire 51 and the second pull wire 52 are extended close to the inner wall of the shell of the knife tube 1, and the extension direction is close to parallel to the axial direction of the knife tube 1. When controlling the movement of the cutter head 4, a smaller force can be used to pull the first pull wire 51 or the second pull wire 52, and the control of the cutter head 4 to move to the required angle by the bending control device 53 is more stable. Therefore, the retracted length of the first pull wire 51 and the second pull wire 52 can be more accurately controlled, so as to more accurately control the moving angle of the cutter head 4. In addition, it can also prevent the first pull wire 51 and the second pull wire 52 from touching the cables, water injection pipes or suction pipes in the knife tube 1 when they are retracted and released, causing cutting or other adverse effects on them.
[0034] In this embodiment, there are four second guide grooves 11, two of which are arranged in a direction substantially parallel to the axial direction of the knife tube 1 and are basically located in a straight line, and the first pull wire 51 passes through these two second guide grooves 11; the other two second guide grooves 11 are also arranged in a direction substantially parallel to the axial direction of the knife tube 1 and are basically located in a straight line, and the second pull wire 52 passes through these two second guide grooves 11. These two groups of four second guide grooves 11 arranged in directions parallel to the axial direction of the knife tube 1 are located on opposite sides of the knife tube 1. That is, from Figure 5As can be seen, two second guide grooves 11 are located on the upper shell of the knife tube 1, and the other two second guide grooves 11 are located on the lower shell of the knife tube 1. This arrangement allows the first pull wire 51 and the second pull wire 52 to be located on opposite sides of the knife tube 1. The two first guide grooves 11 located on the same side are one close to the control handle 5 and the other close to the bendable section 3; the two first guide grooves 11 located on the other side are also one close to the control handle 5 and the other close to the bendable section 3. The extension direction of the first pull wire 51 and the second pull wire 52 is more parallel to the axial direction of the knife tube 1.
[0035] In addition, the arrangement direction of the first guide groove 41 and the second guide groove 11 through which the first pull wire 51 passes is basically parallel to the axial direction of the knife tube 1; the arrangement direction of the first guide groove 41 and the second guide groove 11 through which the second pull wire 52 passes is basically parallel to the axial direction of the knife tube 1.
[0036] It should be noted that, in other embodiments, two, three or more than five (including five) second guide grooves 11 may be provided on the knife tube 1 according to actual needs. Preferably, the sizes of the second guide grooves 11 are the same, but they may also be different, for example, the lengths or widths of the third notches 111 (or the fourth notches 112) between different second guide grooves 11 are different, and the widths of the second blocking walls 113 are different. In the present application, there is no specific limitation on the number and size of the second guide grooves 11.
[0037] Reference Figure 6 As shown, Figure 6 FIG. 1 is a schematic cross-sectional view of another flexible ablation electrode provided in an embodiment of the present application. Figure 5On the basis of the bendable ablation electrode shown, three third guide slots 31 are arranged on the shell of the bendable section 3. Each third guide slot 31 includes two fifth notches 311 and sixth notches 312 extending along the circumferential direction of the bendable section 3. A third blocking wall 313 formed by a part of the shell of the bendable section 3 is located between the fifth notches 311 and the sixth notches 312. The first pull wire 51 passes through the fifth notches 311 of one of the third guide slots 31 and is pressed on the outer side of the third blocking wall 313, and then passes through the bendable section 3 from the sixth notches 312. The outer side of the third blocking wall 313 is the side away from the cavity of the bendable section 3; the second pull wire 52 passes through the fifth notches 311 of another third guide slot 31 and is pressed on the outer side of the third blocking wall 313, and then passes through the bendable section 3 from the sixth notches 312. The first pull wire 51 and the second pull wire 52 pass through different third guide slots 31, respectively. In this embodiment, the first pull wire 51 passes through two third guide grooves 31 in a straight line, and the arrangement direction of the two third guide grooves 31 is basically parallel to the axial direction of the knife tube 1. The second pull wire 52 passes through one third guide groove 31. The arrangement directions of the first guide groove 41, the second guide groove 11 and the third guide groove 31 through which the first pull wire 51 passes are basically parallel to the axial direction of the knife tube 1; the arrangement directions of the first guide groove 41, the second guide groove 11 and the third guide groove 31 through which the second pull wire 52 passes are basically parallel to the axial direction of the knife tube 1.
[0038] In this embodiment, the shell of the bendable section 3 is directly used to make the third guide groove 31 for the first and second pull wires 51 and 52 to pass through, which not only makes the extension direction of the first and second pull wires 51 and 52 more parallel to the axial direction of the knife tube 1 and closer to the inner wall of the shell of the bendable section 3. In addition, due to the arrangement of the fifth notch 311 and the sixth notch 312, the bendable section 3 is easier to bend to a required angle. The third guide groove 31 not only plays a role in facilitating the bending of the bendable section 3, but also plays a role in allowing the first and second pull wires to pass through close to the inner wall of the shell of the bendable section 3.
[0039] It should be noted that in other embodiments, the number of the third guide grooves 31 may be 2 or 4 or more (including 4). Preferably, the sizes of the third guide grooves 31 are the same, but they may also be different. For example, the lengths or widths of the fifth notches 311 (or the sixth notches 312) between different third guide grooves 31 are different, and the widths of the third blocking walls 313 are different. In the present application, the number and size of the third guide grooves 31 are not specifically limited.
[0040] Reference Figure 1 , Figure 3-Figure 6As shown, an insulating base 6 is fixedly mounted on the end of the blade head 4 away from the control handle 5, and the emitter 2 is fixedly mounted on the insulating base 6. In addition, it is preferred that the first pull wire 51 and the second pull wire 52 are symmetrically arranged about the axis of the blade tube 1. In the embodiment of the present application, if the blade head 4 is made of metal, the blade head 4 can be used as a loop electrode. When performing an ablation operation, the loop electrode and the emitter 2 form a closed loop through physiological saline or the like to ablate the diseased tissue.
Claims
1. A bendable ablation electrode, characterized in that: include: Knife tube (1); Emitter (2); A bendable section (3), the bendable section (3) being arranged at one end of the knife tube (1), a knife head (4) being arranged at the end of the bendable section (3), and the emitter (2) being fixedly mounted at the end of the knife head (4); The other end of the knife tube (1) is provided with a control handle (5) for driving the bendable section (3) to bend so as to drive the knife head (4) to rotate; A first pull wire (51) and a second pull wire (52) extending in the knife tube (1), the first pull wire (51) and the second pull wire (52) are both fixedly connected to a bending control device (53) in the control handle (5), one end of the first pull wire (51) and one end of the second pull wire (52) are both fixedly connected to the knife head (4), and the first pull wire (51) and the second pull wire (52) are pulled by the bending control device (53) to control the bending of the bendable section (3) to drive the knife head (4) to move; At least two first guide grooves (41) are arranged on the shell of the cutter head (4), each of the first guide grooves (41) comprises two first notches (411) and a second notch (412) extending along the circumference of the cutter head (4), a first blocking wall (413) formed by a part of the shell of the cutter head (4) is located between the first notches (411) and the second notches (412), the first pull wire (51) passes through the first notch (411) of one of the first guide grooves (41) and is pressed on the outer side of the first blocking wall (413), and then passes through the cutter head (4) from the second notch (412), the second pull wire (52) passes through the first notch (411) of another of the first guide grooves (41) and is pressed on the outer side of the first blocking wall (413), and then passes through the cutter head (4) from the second notch (412), the first pull wire (51) and the second pull wire (52) respectively pass through different first guide grooves (41); A first stopper (42) is fixedly sleeved on one end of the first pull wire (51) fixedly connected to the cutter head (4), the first stopper (42) is located on a side of the first guide groove (41) away from the control handle (5), and the first stopper (42) can be blocked by the first guide groove (41); A second stopper (43) is fixedly sleeved on one end of the second pull wire (52) fixedly connected to the cutter head (4); the second stopper (43) is located on a side of the first guide groove (41) away from the control handle (5), and the second stopper (43) can be blocked by the first guide groove (41).
2. The bendable ablation electrode according to claim 1, characterized in that: The cutter head (4), the first stopper (42), the second stopper (43), the first pull wire (51) and the second pull wire (52) are all made of metal; One end of the first pull wire (51) close to the cutter head (4) is welded and fixed to the inner wall of the shell of the cutter head (4), and the first pull wire (51) is welded and fixed to the first stopper (42); One end of the second pull wire (52) close to the cutter head (4) is welded and fixed to the inner wall of the shell of the cutter head (4), and the second pull wire (52) is welded and fixed to the second stopper (43).
3. The bendable ablation electrode according to claim 2, characterized in that: The first stopper (42) and / or the second stopper (43) are welded to the inner wall of the shell of the cutter head (4).
4. The bendable ablation electrode according to claim 1, characterized in that: The first stopper (42) and the second stopper (43) are hollow cylinders, hollow cuboids or hollow cubes.
5. The bendable ablation electrode according to claim 1, characterized in that: The first pull wire (51) and the second pull wire (52) are flexible wires; The first pull wire (51) is fixed to the first stopper (42) by winding and knotting; The second pull wire (52) is fixed to the second stopper (43) by winding and knotting.
6. The bendable ablation electrode according to claim 5, characterized in that: The first pull wire (51) is fixed to the cutter head (4) by winding and knotting on the first blocking wall (413); The second pull wire (52) is fixed to the cutter head (4) by winding and knotting on the first blocking wall (413).
7. The bendable ablation electrode according to claim 1, characterized in that: At least two second guide grooves (11) are arranged on the shell of the knife tube (1), each of the second guide grooves (11) comprises two third notches (111) and a fourth notch (112) extending along the circumference of the knife tube (1), and between the third notches (111) and the fourth notches (112) is a second blocking wall (113) formed by a part of the shell of the knife tube (1); the first pull wire (51) passes through the third notch (111) of one of the second guide grooves (11) and is pressed on the outer side of the second blocking wall (113), and then passes through the fourth notch (112) into the knife tube (1); the second pull wire (52) passes through the third notch (111) of another of the second guide grooves (11) and is pressed on the outer side of the second blocking wall (113), and then passes through the fourth notch (112) into the knife tube (1).
8. The bendable ablation electrode according to claim 7, characterized in that: At least two third guide grooves (31) are arranged on the shell of the bendable section (3), each of the third guide grooves (31) comprising a fifth notch (311) and a sixth notch (312) extending along the circumference of the bendable section (3), a third blocking wall (313) formed by a part of the shell of the bendable section (3) is located between the fifth notch (311) and the sixth notch (312), and the first pull wire (51) passes through the fifth notch (311) of one of the third guide grooves (31). 1) is pressed on the outer side of the third blocking wall (313) and then passes through the sixth notch (312) into the bendable section (3); the second pull wire (52) passes through the fifth notch (311) of another third guide groove (31) and then is pressed on the outer side of the third blocking wall (313) and then passes through the sixth notch (312) into the bendable section (3); the first pull wire (51) and the second pull wire (52) pass through different third guide grooves (31) respectively.
9. The bendable ablation electrode according to claim 7 or 8, characterized in that: The arrangement direction of the first guide groove (41) and the second guide groove (11) through which the first pulling wire (51) passes is parallel to the axial direction of the knife tube (1), and the arrangement direction of the first guide groove (41) and the second guide groove (11) through which the second pulling wire (52) passes is parallel to the axial direction of the knife tube (1); or The arrangement direction of the first guide groove (41), the second guide groove (11) and the third guide groove (31) through which the first pulling wire (51) passes is parallel to the axial direction of the knife tube (1), and the arrangement direction of the first guide groove (41), the second guide groove (11) and the third guide groove (31) through which the second pulling wire (52) passes is parallel to the axial direction of the knife tube (1).
10. The bendable ablation electrode according to claim 9, characterized in that: The first guide groove (41), the second guide groove (11) and the third guide groove (31) through which the first pull wire (51) passes and the first guide groove (41), the second guide groove (11) and the third guide groove (31) through which the second pull wire (52) passes are respectively located on opposite sides of the knife tube (1).
Citation Information
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