Ablation handle and ablation catheter

Abstract

The utility model belongs to the field of medical instrument ablation, and provides an ablation handle and an ablation catheter, the ablation handle comprises a shell, a transmission assembly and a handle, the shell is provided with a grip, the handle is rotatably arranged on the shell, the transmission assembly comprises a first fixed rack, a first movable gear and a first movable rack, the first fixed rack is fixedly arranged on the shell, and the first movable rack is fixedly arranged on the shell. The first movable gear is movably arranged relative to the shell and movably connected with one end of the handle, the first movable rack is movably arranged relative to the shell and can do reciprocating linear movement relative to the shell, and the first movable gear is meshed with the first fixed rack and the first movable rack. By arranging the transmission assembly, when the handle is rotated by a small angle, the ablation electrode can be expanded in multiple strokes through the transmission assembly, so that the ablation electrode is quicker in response, more convenient and more labor-saving to operate, and an operator can operate the ablation electrode with one hand and flexibly control the ablation electrode with fingers.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device ablation, and particularly relates to an ablation handle and an ablation catheter. Background Art

[0002] Pulsed electric field is a kind of ablation with non-thermal energy, which causes less damage to healthy tissues. In addition, pulsed electric field ablation also has selectivity for cells and tissues. Pulsed electric field ablation has a threshold, and can selectively ablate diseased tissues during the ablation process, which is an airway ablation treatment method with both safety and effectiveness.

[0003] Existing pulsed ablation usually requires holding the mirror with one hand, which has higher requirements for the one-handed manipulability of the consumables. Currently, most of them are methods such as one-handed turning of the wheel, one-handed pushing of the slider, two-handed pushing or pulling back, etc. Currently, manual control is often used to open and recycle the electrodes, and it cannot be quickly and efficiently used in combination with other new devices (such as robots, etc.). When using a robot to operate the dashboard, the behavior of still needing to operate the consumables to open and recycle exists. For some surgeries, such as bronchial rheoplasty, the number of times of releasing and recycling the consumables per surgery is as high as 170 times. This increases the operation time and complexity between the dashboard and the consumables, and is prone to operation errors. While using two people to operate simultaneously increases the personnel cost and may cause damage to the patient's cavity due to non-recycling during movement. Summary of the Utility Model

[0004] The utility model provides an ablation handle to solve the technical problems existing in the above technical background, so as to facilitate the operation of ablation surgery by surgical staff. Another aspect of the utility model lies in providing an ablation catheter.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical scheme:

[0006] An ablation handle, comprising:

[0007] It includes a housing, a transmission component and a handle. The housing is provided with a grip, the handle is rotatably arranged on the housing, and the transmission component is arranged inside the housing;

[0008] The transmission component includes a first fixed rack, a first moving gear and a first moving rack. The first fixed rack is fixedly arranged on the housing, the first moving gear is movably arranged relative to the housing and is movably connected to one end of the handle. The first moving rack is movably arranged relative to the housing, the first moving rack can make reciprocating linear movement relative to the housing, and the first moving gear meshes with the first fixed rack and the first moving rack respectively.

[0009] In some embodiments, a first limiting structure is provided between the first movable rack and the shell, and the first limiting structure includes a first limiting groove provided on the shell and a first limiting boss provided on the first movable rack, or a first limiting boss provided on the shell and a first limiting groove provided on the first movable rack, and the first limiting boss is movably engaged in the first limiting groove so that the first movable rack can make reciprocating linear movements in the shell.

[0010] In some embodiments, a second limiting structure is also provided on the shell, and the second limiting structure includes a second limiting groove arranged on the shell and a second limiting shaft arranged on the first moving gear, and the second limiting shaft is movably engaged in the second limiting groove, and the second limiting shaft can make reciprocating linear movements in the second limiting groove.

[0011] In some embodiments, the handle is rotatably arranged relative to the shell through a hole-axis structure, a first rotation point is arranged between the handle and the shell, a first connecting bracket is arranged on the side of the handle close to the first rotation point, a third limiting groove adapted to the second limiting rotating shaft is arranged on the first connecting bracket, and one end of the second limiting rotating shaft passes through the third limiting groove and is rotatably connected to the shell.

[0012] In some embodiments, there are two second limiting grooves symmetrically arranged in the housing, and two ends of the second limiting rotating shaft are respectively and movably inserted in the second limiting grooves.

[0013] In some embodiments, the first connecting bracket abuts against the first movable rack, so that the first movable rack can move back and forth linearly along the first limiting groove.

[0014] In some embodiments, when the first movable rack moves along the first limiting groove, the contact surface between the first connecting bracket and the first movable rack is a planar structure.

[0015] In some embodiments, a first clearance space is provided on a side of the handle close to the first limiting groove, so that the first movable rack can perform reciprocating linear movement along the first limiting groove.

[0016] In some embodiments, a first wiring groove is provided on the first movable rack, and an axial direction of the first wiring groove is consistent with a moving path of the first movable rack.

[0017] In some embodiments, a reset mechanism is further provided on the housing, and the reset mechanism is used for resetting the handle.

[0018] In some embodiments, a locking mechanism is further included, and the locking mechanism is configured to fix the position of the handle so as to maintain the ablation electrode in the current expanded state.

[0019] In some embodiments, the locking mechanism includes a locking elastic piece and a locking slider with elastic deformation. A locking chute adapted to the locking slider is provided on the housing. The locking slider is slidably disposed in the locking chute. The locking elastic piece is connected to the locking slider, and one end thereof passes through the housing and can abut against the first moving rack.

[0020] When the locking elastic piece abuts against the first moving rack, the first moving rack can only move toward the handle side. When the locking elastic piece disengages from the first moving rack, the first moving rack can move reciprocally in a straight line.

[0021] In some embodiments, a first included angle is provided between the moving trajectories of the locking elastic piece and the first moving rack. When the locking elastic piece abuts against the first moving rack, the first moving rack can only move toward the handle side. When the handle drives the first moving rack to move and expands the ablation electrode, one end of the locking elastic piece can move from one tooth surface of the first moving rack to another tooth surface and abut.

[0022] In some embodiments, the present utility model further provides an ablation catheter, including the aforementioned ablation handle.

[0023] Compared with the prior art, the beneficial effects brought by the present utility model are as follows:

[0024] By providing a handle structure in this application, it is convenient for surgical personnel to perform flexible operations with a single hand finger. A first moving gear is provided at one end of the handle, and a first fixed rack and a first moving rack are provided inside the handle. Among them, the first moving gear is movably disposed at one end of the handle, and the first moving gear meshes with both the first fixed rack and the first moving rack. When the handle drives the first moving gear to move along the first fixed rack, the first moving rack moves with a 2-fold stroke relative to the first moving gear, thereby realizing the rapid movement of the first moving rack and a quicker response.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, and these will become apparent from the following description, or can be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective view of an ablation catheter of the present utility model;

[0027] Figure 2 is an enlarged structural view of the ablation electrode of an ablation catheter of the present utility model;

[0028] Figure 3 Stereogram of the internal transmission structure of an ablation handle of the present utility model;

[0029] Figure 4 is Figure 3 the front view in;

[0030] Figure 5 is Figure 4 the sectional view at A - A in;

[0031] Figure 6 Stereogram of the first moving rack of an ablation handle of the present utility model;

[0032] Figure 7 Stereogram of the handle of an ablation handle of the present utility model;

[0033] Figure 8 Structural schematic diagram of multiple ablation electrodes of an ablation catheter of the present utility model;

[0034] Figure 9 Schematic diagram of the locking mechanism of an ablation handle of the present utility model;

[0035] Figure 10 is Figure 9 the enlarged view at B in;

[0036] Figure 11 The first embodiment of the reset mechanism of an ablation handle of the present utility model;

[0037] Figure 12 The second embodiment of the reset mechanism of an ablation handle of the present utility model;

[0038] Figure 13 Structural schematic diagram of an ablation catheter of the present utility model applied to an endoscope;

[0039] Figure 14 Schematic diagram of the scale markings of an ablation catheter of the present utility model;

[0040] Figure 15 The third embodiment of the reset mechanism of an ablation handle of the present utility model. Detailed implementation manners

[0041] The following further describes the present application in detail with reference to specific drawings. In the description of this embodiment, unless otherwise specified, the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the present application must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0042] In one embodiment, as Figure 1-2 shown, an ablation catheter provided by the present utility model mainly includes a delivery sheath 200, a traction wire 300, an ablation electrode 201, and an ablation handle 100;

[0043] The delivery sheath 200 is provided with a first channel and has certain directivity and flexibility to adapt to various bent cavities of the human body. Specifically, in this embodiment, the delivery sheath 200 is composed of a multi-layer composite material. The outer layer is composed of a polymer material with good biocompatibility and has multiple hardness segments. The proximal end close to the ablation handle 100 has good pushability and high hardness characteristics, which can be PA6, PA12, block polyamide or other polymer materials. The distal end close to the ablation electrode 201 has flexibility and low hardness characteristics, which can be block polyamide, polyamide or other polymer materials.

[0044] The middle layer is composed of a metal wire reinforcement layer, which can be a braided layer, a coil layer or a combination thereof. Further, the braided layer has different braiding densities. The proximal end close to the ablation handle 100 is selected with a low-density braiding to enhance pushability, and the distal end close to the ablation electrode is selected with a high-density braiding to enhance flexibility. The material of the middle layer can be sus304, sus316 or Ni-Ti, etc.

[0045] Further, the inner layer is composed of a polymer material with good lubricity and low frictional resistance to reduce the resistance when the traction wire moves in the first channel of the delivery sheath. Optionally, the inner layer material can be HDPE, PTFE, FEP or other polymer materials with a low coefficient of friction.

[0046] Further, an insulating layer is also provided on the delivery sheath 200. By setting the insulating layer, during the process of transferring ablation energy from the power supply connector to the ablation electrode, current leakage and ablation energy loss can be prevented in the delivery sheath 200, and the ablation energy is only released at the ablation electrode 201, avoiding ablation energy loss and achieving the purpose of precise ablation.

[0047] The traction wire 300 is movably disposed in the first channel of the delivery sheath 200 and can perform axial reciprocating movement in the first channel;

[0048] The ablation electrode 201 is disposed at the distal end of the delivery sheath 200. The ablation electrode 201 is a expandable structure that adaptively matches and adheres to the human body cavity. In this embodiment, the human body cavity includes, but is not limited to, the airway, intestine, blood vessel, etc. The ablation electrode 201 can be configured to apply ablation energy. In this embodiment, the distal end of the delivery sheath 200 is the end far from the ablation handle 100. The ablation electrode 201 has a first end and a second end. One end of the traction wire 300 is connected to the first end of the ablation electrode 201, and the second end of the ablation electrode 201 is connected to the distal end of the delivery sheath 200. By driving the first end of the ablation electrode 201 closer to the second end through the traction wire 300, the expansion of the ablation electrode 201 is realized, so that the ablation electrode 201 abuts against the inner wall of the human body cavity;

[0049] As Figure 3 and Figure 4 shown, an ablation handle provided by the present invention includes a housing, a transmission assembly, and a handle 102. A grip 101 is provided on the housing for the operator to hold and operate. The handle 102 is rotatably disposed on the housing. When the operator holds the grip 101 with one hand, the handle 102 can be controlled to rotate towards the grip 101 by fingers;

[0050] The transmission assembly is disposed inside the housing. One end of the handle 102 is connected to the traction wire 300 through the transmission assembly. Specifically, as Figure 3-5 shown, the transmission assembly includes a first fixed rack 105, a first moving rack 108, and a first moving gear 107. The first fixed rack 105 is fixedly disposed on the housing. The first moving rack 108 is movably disposed relative to the housing and can perform reciprocating linear movement. The first moving rack 108 and the first fixed rack 105 are relatively parallelly disposed. The first moving gear 106 is movably disposed at one end of the handle 102 and can rotate relative to the housing. At the same time, the first moving gear 107 meshes with the first fixed rack 105 and the first moving rack 108 respectively. By providing the first moving gear, the first fixed rack, and the first moving rack, when the handle rotates relative to the housing, the first moving gear 107 can be driven to move linearly along the first fixed rack 105. At the same time, since the first moving gear 107 meshes with the first moving rack 108, the first moving rack 108 can be driven to move relative to the first moving gear 107 with a double stroke, so that when the handle 102 rotates at a small angle, the traction wire 300 can be quickly moved, realizing the approach or separation of the first end and the second end of the ablation electrode 201, and thus realizing the rapid expansion or contraction of the ablation electrode 201.

[0051] In one embodiment, as Figure 3 and Figure 6A first limit structure is provided between the first moving rack 108 shown and the housing. The first limit structure is used for the first moving rack 108 to perform reciprocating linear movement relative to the housing. Specifically, the first limit structure includes a first limit groove 102 provided on the housing and a first limit boss 1081 provided on the first moving rack 108 and adapted to the first limit groove 102. In this embodiment, the first limit groove 102 is composed of two baffles. The two baffles are arranged in parallel and have a set spacing. The thickness of the first limit boss 1081 matches the spacing. The first limit boss 1081 is movably clamped in the first limit groove 102, so that the first moving rack 108 makes reciprocating linear movement along the first limit groove 102.

[0052] Optionally, it can also be that the first limit boss 1081 is provided on the housing and the first limit groove 102 is provided on the first moving rack 108, which can also achieve the reciprocating linear movement of the first moving rack 108 relative to the housing. Further, the first moving rack 108 abuts against the two baffles, so as to prevent the first moving rack 108 from shaking.

[0053] In one embodiment, a second limit structure is provided between the housing and the first moving gear 107. The second limit structure includes a second limit groove 104 provided on the housing and a second limit rotating shaft 106 provided on the first moving gear 107. The second limit groove 104 is arranged parallel to the first limit groove 102. The second limit groove 104 is adapted to the outer diameter of the second limit rotating shaft 106, and the second limit groove 104 is provided with a certain length to satisfy the reciprocating linear movement of the first moving gear 107 along the first fixed rack 105. In this embodiment, both ends of the second limit groove 104 are closed to prevent the second limit rotating shaft 106 from exiting the second limit groove 104. The second limit rotating shaft 106 can be rotatably connected or fixedly connected to the first moving gear 107. In this embodiment, the second limit grooves 104 are symmetrically arranged, and the number is two, which are respectively provided on two relatively detachable housings. The two ends of the second limit rotating shaft 106 are respectively movably inserted into the second limit grooves 104 to ensure the reciprocating linear movement of the first moving gear 107.

[0054] In one embodiment, such as Figure 3 and Figure 7As shown, the handle 102 is rotatably arranged relative to the housing through a hole-shaft structure. There is a first rotation point 109 between the handle and the housing. In this embodiment, a rotating shaft is provided on the handle 102, and a matching hole is provided on the housing. At the same time, the cooperation between the rotating shaft and the hole further restricts the shaking of the handle 102, so that the handle 102 only rotates relative to the housing, and its rotation trajectory is on a plane. A first connecting bracket 1021 is provided on one side close to the first rotation point 109. An angle is provided between the first connecting bracket 1021 and the handle 102, so that the first connecting bracket 1021 is arranged towards the first fixed rack 105. A third limiting groove 1022 is provided on the first connecting bracket 1021. The third limiting groove 1022 is arranged along the length direction of the first connecting bracket 1021. The third limiting groove 1022 is adapted to the second limiting rotating shaft 106. One end of the second limiting rotating shaft 106 passes through the third limiting groove 1022 and is movably inserted into the second limiting groove 104. Among them, the third limiting groove 1022 is provided with a certain length to meet the displacement compensation for the handle 102 to drive the first moving gear 107 to perform reciprocating linear movement and avoid movement interference. In this embodiment, the length of the third limiting groove 1022 should meet the requirement that the ablation electrode 201 can be fully expanded.

[0055] Further, in order to enable the surgical staff to use a smaller gripping force during the operation, with the first rotation point 109 as the reference, the force arm of the handle 102 is greater than the force arm between the rotation center of the first moving gear 107 and the first rotation point 109. Thus, the labor-saving effect is achieved.

[0056] In one embodiment, to ensure the compactness of the structure and at the same time ensure that the first moving gear 107 only moves linearly, the first connecting bracket 1021 abuts against the side surface of the first moving rack 107, and then the other side surface of the first moving gear 107 abuts against the side surface of the second limiting groove 104, so as to ensure that the first moving gear 107 moves linearly between the first connecting bracket 1021 and the second limiting groove 104. Optionally, it can also be that the second limiting rotating shaft 106 abuts against the inner wall of the second limiting groove 104 for limiting, and the above effect can also be achieved.

[0057] Further, as Figure 5 and Figure 7 shown, in order to ensure that the first moving gear 107 can move smoothly, the contact surface between the first connecting bracket 1021 and the first moving rack 107 is a plane structure. In this embodiment, both of them are plane structures. On the one hand, the contact area is large, and at the same time, the support structure is relatively stable. Optionally, the first connecting bracket 1021 can also be set as an arc surface structure to be tangent to the first moving gear 107, and the above effect can also be achieved.

[0058] In one embodiment, in order to enable the moving stroke of the first moving gear 107 to satisfy the complete expansion of the ablation electrode 201 and avoid motion interference, a first relief space is provided on one side of the handle 102 close to the first limiting groove 102, so that the first moving rack 107 can perform reciprocating linear movement along the first limiting groove 102. In this embodiment, a planar relief structure is provided on the handle 102, that is, as Figure 7 shown, it is coplanar with the side surface of the first connecting bracket 1021, thereby forming a relief space.

[0059] In one embodiment, as Figure 11 and 12 shown, the ablation handle 100 is further provided with a reset mechanism for resetting the handle 102. Specifically. In this embodiment, the reset mechanism is a reset spring 1023. One end of the reset spring 1023 is connected to the housing, and the other end of the reset spring 1023 is connected to the handle 102. Specifically, as Figure 11 shown, one end of the reset spring 1023 is connected to the handle 102 at the first connecting bracket 1021, and the other end of the reset spring 1023 is connected to the housing. When the handle 102 rotates, the reset spring 1023 is stretched. When the handle 102 is released, the reset spring 1023 returns to its initial state, thereby resetting the handle 102.

[0060] Optionally, the reset spring 1023 can also be arranged outside the housing. As Figure 12 shown, one end of the reset spring 102 is connected to the handle 102, and the other end is connected to the grip 101. When the handle 102 rotates, the reset spring 1023 is compressed. When the handle 102 is released, the reset spring 1023 drives the handle 102 to return to its initial state.

[0061] Optionally, as Figure 15 shown, the reset mechanism can also be a compression spring 1024. In this embodiment, the compression spring 1024 is sleeved and fixed on the shaft at the rotation point of the handle 102. One end of the compression spring 1024 extends out and abuts against the inner wall of the handle 102, and the other end of the compression spring 1024 extends out and abuts against the inner wall of the grip 101. When the handle 102 approaches the grip 101, at this time the compression spring 1024 undergoes elastic deformation and is compressed. When the handle 102 is released, the compression spring 1024 returns to its initial state, and the handle 102 is reset accordingly.

[0062] In one embodiment, in order to facilitate the operation of the surgical staff, the ablation electrode 201 is expanded to a state and maintained, as Figure 9 and Figure 10As shown, a locking mechanism 400 is further provided inside the housing. The locking mechanism 400 is used to fix the position of the handle 102, thereby maintaining the expanded state of the ablation electrode 201, so that the surgical staff does not need to hold the handle 102 for a long ablation time. At the same time, it can also prevent the surgical staff from causing inconsistent support states of the ablation electrode 201 due to inconsistent forces, affecting the ablation quality.

[0063] Further, in this embodiment, the locking mechanism 400 includes a locking elastic piece 402 with elastic deformation and a locking slider 401. A locking chute adapted to the locking slider 401 is provided on the housing. The locking slider 401 is slidably disposed in the locking chute. The locking elastic piece 402 is connected to the locking slider 401, and one end passes through the housing and can abut against the first moving rack 108. When the locking elastic piece 402 abuts against the first moving rack 108, the first moving rack 108 can only move toward the handle 102 side. When the locking elastic piece 402 disengages from the first moving rack 108, the first moving rack 108 can move reciprocally in a straight line.

[0064] Specifically, when locking is required, the surgical staff drives one end of the locking elastic piece 402 to move into the tooth groove of the first moving gear 108 and abut against one of the tooth surfaces by moving the locking slider 401. A certain included angle is set between the moving track of the locking elastic piece 402 and the first moving rack 108. As Figure 9 shown, the first moving rack 108 can only move toward the handle 102 side, so as to effectively abut against the first moving rack 108. In this embodiment, the abutting effect is the best when the axis of the locking elastic piece 402 is perpendicular to the tooth surface it abuts against. When the first moving rack 108 moves to drive the ablation electrode 201 to expand, since the locking elastic piece 402 undergoes elastic deformation under the action of the first moving rack 108, one end of the locking elastic piece 402 withdraws from the previous tooth groove. When the locking elastic piece 402 moves to the next tooth groove, the locking elastic piece 402 returns to its original state and abuts against the tooth surface of the next adjacent tooth. Thus, it is avoided that the first moving rack 108 retracts without the surgical staff applying a gripping force to the handle 102. When the operation is over, the surgical staff pushes the locking slider 401 to the initial position, and one end of the locking elastic piece 402 disengages from the tooth groove of the first moving rack 108. Under the action of the return spring 1023, the ablation electrode 201 quickly contracts to the initial state.

[0065] Further, the end of the locking elastic piece 402 in contact with the first moving rack 108 is a planar structure, and this planar structure is provided with a certain inclination angle, which is the same as the inclination angle of the tooth surface against which the locking elastic piece 402 abuts. On the one hand, it provides stable support by increasing the contact surface, and on the other hand, it also facilitates the locking elastic piece 402 to withdraw from the tooth groove of the first moving rack 108 and reduces the withdrawal resistance.

[0066] In one embodiment, as Figure 8As shown, in order to achieve a larger ablation range, a plurality of expandable ablation electrodes 201 are provided at the distal end of the delivery sheath 200. When the number of ablation electrodes 201 is greater than 2, a first connecting member 102 is provided between two adjacent ablation electrodes 201. The first connecting member 102 is movably sleeved on the traction wire 300, and the two ends of two adjacent ablation electrodes 201 are respectively connected to the two ends of the first connecting member 102. In this embodiment, the first connecting member 102 is provided with a certain length, so that there is a certain distance between two adjacent ablation electrodes 201.

[0067] Furthermore, the first connecting member 102 and the two ablation electrodes 201 connected to the two ends of the first connecting member 102 are of an integral structure, and the first connecting member 102 is made of a conductive material. When the electrode wire 204 is connected to one of the ablation electrodes 201, a plurality of ablation electrodes 201 can be energized to form a monopolar ablation structure, improving the ablation range to adapt to the ablation of larger lesions.

[0068] Furthermore, the first connecting member 102 can be made of an insulating material. To expand the ablation range, any two of the plurality of ablation electrodes 201 can be correspondingly connected to the positive electrode wire and the negative electrode wire, so that a bipolar ablation structure is formed between the two ablation electrodes 201 connected to the positive electrode wire and the negative electrode wire. Since the current of the bipolar structure passes through the medium stably, the current density is stable, so that the output energy efficiency in the bipolar state is more stable.

[0069] When a plurality of ablation electrodes 201 are correspondingly connected to the positive electrode wire, ablation of a single ablation electrode 201 can be achieved, reducing the ablation range to adapt to the ablation of smaller ablation lesions.

[0070] Furthermore, when there are a plurality of ablation electrodes 201, the sizes of the ablation electrodes 201 are different. The ablation electrode 201 far from the distal end of the delivery sheath 200 has a small expansion range, and the ablation electrode 202 near the distal end of the delivery sheath 200 has a large expansion range to adapt to the needs of different lesions.

[0071] In one embodiment, as Figure 13-14 shown, in order to facilitate the surgical staff to confirm the position of the ablation catheter, since the ablation catheter needs to be used in the working channel of the endoscope 500, a scale mark 205 is provided at the distal end of the delivery sheath 200. The scale marks 205 are evenly distributed from the distal end of the delivery sheath 200 to its proximal end. When the ablation catheter extends out of the working forceps channel, the scale marks 205 will be exposed under the lens of the endoscope 500. The surgical staff can observe the scale marks 205 through the lens to judge the position of the ablation electrode 201, enabling the ablation electrode 201 to accurately reach the lesion position and increasing the success rate of the operation.

[0072] In one embodiment, a guiding tip 301 is provided at one end of the traction wire 300 close to the ablation electrode 201, and one end of the ablation electrode 201 is fixed to the guiding tip 301. Among them, a smooth guiding structure is provided at one end of the guiding tip 301 away from the ablation electrode 201, and the smooth guiding structure is a spherical surface or an arc surface. Specifically, the guiding tip 301 and the ablation electrode 201 can be connected by hot melting, glue bonding, laser welding or other methods. The guiding tip 301 has a soft characteristic, which can effectively reduce the damage to the human body cavity during the process of introducing it into the airway or other human body cavities. Further, the guiding tip 301 is made of a polymer material, which can be composed of block polyether amide resin, polyurethane rubber, silica gel, etc. By setting the smooth guiding structure, the damage to the inner wall of the human body cavity can be effectively reduced during the process of introducing it into the human body cavity.

[0073] In one embodiment, the ablation electrode 201 is a basket weaving structure. Specifically, the ablation electrode 201 is prepared by weaving metal wires. The ablation electrode 201 prepared in this way can be opened and closed in size, and has the characteristics of small resistance and small external tension. It can fully fit the lesion site while causing less damage to the airway, and can obtain good treatment effects after releasing pulsed electric fields.

[0074] Further, the material of the weaving wire of the ablation electrode 201 is a metal material with small resistance and good elasticity and not prone to plastic deformation, which can be SUS304, SUS316L, cobalt-chromium alloy, nitinol alloy, etc.;

[0075] Further, after the ablation electrode 201 with a basket weaving structure is expanded, it can be in the shape of a water droplet, a spindle, a blade, etc. For this type of shape, the outer diameter of the middle region is large, the outer diameter of the two end regions is small, and the supporting force of the two end regions is strong, while the supporting force of the middle region is weak. The strong supporting force on both sides can ensure that the ablation electrode is straight, and the small supporting force in the middle region has good compliance and can ensure a good wall attachment effect.

[0076] Further, the weaving method of the ablation electrode 201 with a basket weaving structure can be 1-over-1, 1-over-2, 2-over-2 or other weaving methods. This weaving method can make the ablation electrode 201 open and close evenly and circularly, can fully cover the diseased airway, and obtain good treatment effects.

[0077] Further, the weaving density PPI of the ablation electrode 201 with a basket weaving structure can be 5 to 60. This weaving density can provide good radial supporting force when opened, can closely fit the airway, and obtain good treatment effects. At the same time, when closed, this weaving density has a small outer diameter of the profile and can pass through the working channel of the endoscope, facilitating reaching the lesion site.

[0078] Furthermore, the ablation electrode 201 is polished, having a small high-frequency resistance, which improves the transmission ability of the pulsed electric field and promotes the electroporation effect of cells.

[0079] Furthermore, electrode rings 202 are provided at both ends of the ablation electrode 201 with a basket weaving structure, and the electrode rings 202 wrap both ends of the ablation electrode 201 with a basket weaving structure.

[0080] Furthermore, the electrode wire is connected to the electrode ring 202 for conducting electricity, avoiding the occurrence of virtual connection and leakage, thereby improving the stability of the conductivity.

[0081] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An ablation handle, characterized in that, include: It comprises a housing, a transmission assembly and a handle, wherein the housing is provided with a handle, the handle is rotatably arranged on the housing, and the transmission assembly is arranged in the housing; The transmission assembly includes a first fixed rack, a first movable gear and a first movable rack. The first fixed rack is fixedly arranged on the shell, the first movable gear is movably arranged relative to the shell and is movably connected to one end of the handle, the first movable rack is movably arranged relative to the shell, the first movable rack can make reciprocating linear movements relative to the shell, and the first movable gear is respectively meshed with the first fixed rack and the first movable rack.

2. The ablation handle according to claim 1, wherein, A first limiting structure is provided between the first movable rack and the shell, and the first limiting structure includes a first limiting groove provided on the shell and a first limiting boss provided on the first movable rack, or a first limiting boss provided on the shell and a first limiting groove provided on the first movable rack, and the first limiting boss is movably engaged in the first limiting groove so that the first movable rack can make reciprocating linear movements in the shell.

3. The ablation handle according to claim 2, wherein The shell is also provided with a second limiting structure, which includes a second limiting groove arranged on the shell and a second limiting rotating shaft arranged on the first moving gear. The second limiting rotating shaft is movably engaged in the second limiting groove, and the second limiting rotating shaft can make reciprocating linear movements in the second limiting groove.

4. The ablation handle according to claim 3, wherein, The handle is rotatably arranged relative to the shell through a hole-axis structure, a first rotation point is arranged between the handle and the shell, a first connecting bracket is arranged on the side of the handle close to the first rotation point, a third limiting groove adapted to the second limiting rotating shaft is arranged on the first connecting bracket, and one end of the second limiting rotating shaft passes through the third limiting groove and is rotatably connected to the shell.

5. An ablation handle according to claim 4, wherein There are two second limiting grooves which are symmetrically arranged in the housing, and two ends of the second limiting rotating shaft are respectively and movably inserted in the second limiting grooves.

6. The ablation handle according to claim 5, wherein The first connecting bracket abuts against the first movable rack, so that the first movable rack can move back and forth linearly along the first limiting groove.

7. An ablation handle according to claim 6, characterized in that, When the first movable rack moves along the first limiting groove, the contact surface between the first connecting bracket and the first movable rack is a planar structure.

8. The ablation handle according to claim 6, characterized in that, A first clearance space is arranged on one side of the handle close to the first limiting groove.

9. The ablation handle according to claim 1, wherein The first movable rack is provided with a first wiring groove, and the axial direction of the first wiring groove is consistent with the moving path of the first movable rack.

10. The ablation handle according to claim 1, wherein, The housing is also provided with a reset mechanism, which is used for resetting the handle.

11. An ablation handle according to claim 1, wherein, It also includes a locking mechanism, which is used to fix the position of the handle so that the ablation electrode maintains a current expansion state.

12. The ablation handle according to claim 11, wherein, The locking mechanism comprises a locking spring sheet with elastic deformation and a locking slider. A locking slide groove adapted to the locking slider is provided on the housing. The locking slider is slidably arranged in the locking slide groove. The locking spring sheet is connected to the locking slider, and one end of the locking spring sheet passes through the housing and can abut against the first movable rack. When the locking elastic piece abuts against the first moving rack, the first moving rack can only move towards the handle side. When the locking elastic piece disengages from the first moving rack, the first moving rack can move linearly back and forth.

13. An ablation handle according to claim 12, wherein, A first included angle is provided between the moving track of the locking elastic piece and the first moving rack. When the locking elastic piece abuts against the first moving rack, the first moving rack can only move towards the handle side. When the handle drives the first moving rack to move and expand the ablation electrode, one end of the locking elastic piece can move from one tooth surface of the first moving rack to another tooth surface and abut.

14. An ablation catheter, characterized in that, Comprising the ablation handle according to any one of claims 1-13.

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