A double-electrode ablation head

Abstract

The present application relates to a dual-electrode ablation head, which belongs to the field of medical device technology. It solves the problems of the existing monopolar ablation probe, such as small ablation treatment range, low ablation efficiency, independent external electrode settings affecting the ablation effect, and the two electrodes of the existing bipolar ablation probe cannot independently adjust the expansion size, resulting in failure to meet actual clinical needs. The dual-electrode ablation head includes a first electrode mesh, a second electrode mesh, and an independently controlled first drive mechanism and a second drive mechanism; the first drive mechanism realizes the contraction and expansion of the first electrode mesh through push-pull operations, and the expansion size is adjustable; the second drive mechanism realizes the contraction and expansion of the second electrode mesh through rotation operations, and the expansion size is adjustable; and the first electrode mesh and the second electrode mesh in the contracted and expanded states are both exposed outside the pipeline assembly. The present application realizes ablation of airways of different sizes with high ablation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a dual-electrode ablation head. Background Art

[0002] Chronic obstructive pulmonary disease (COPD) is a chronic airway inflammatory disease characterized by progressive airflow limitation. The main symptoms are long-term cough, sputum and dyspnea. The incidence rate increases with age, and the socioeconomic burden associated with acute exacerbations is huge. Acute exacerbations of COPD and various complications often accompany the entire course of the disease, seriously affecting the patient's prognosis. Chronic airway mucus hypersecretion (CMH) is the main pathophysiological feature of COPD, clinically manifested as chronic cough and sputum. Increased mucus production and ciliary clearance dysfunction may lead to respiratory mucus accumulation and the formation of sputum plugs. Severe sputum obstruction can be life-threatening. The mechanism of chronic airway mucus hypersecretion is excessive mucus secretion by airway epithelial mucus glands and goblet cells.

[0003] Pulsed electric field ablation technology is a technology that uses high-voltage discharge to cause irreversible electroporation of cells. It can directly act on cells to cause cell apoptosis to achieve the purpose of treatment. Specifically, the short-term, high-voltage electric pulses generated by pulsed electric field ablation technology can induce electroporation of cells, thereby changing the permeability of their membranes and causing cell death. This method is called heatless cauterization because it does not rely on the generation of high heat to kill cells, so it can greatly reduce damage to surrounding normal tissues. In addition, no tissue scab will occur during and after the operation, so it will not affect its normal function when applied to the trachea of ​​the lungs. Finally, since the mechanism of cell death caused by irreversible electroporation is apoptosis, not necrosis. Apoptosis is a programmed death process that clears apoptotic cells through immune intervention, while phagocytes clear apoptotic cells as a normal cell death process, thereby promoting the regeneration and repair of normal tissues. Therefore, after irreversible electroporation treatment, the treatment area can be replaced by normal cells in a short time to restore its original function.

[0004] The existing pulsed electric field technology used for COPD patients is a monopolar ablation probe. However, when using a single-electrode ablation probe, an additional matching electrode needs to be attached to the patient in order to achieve discharge, but this will result in a larger distance between the two electrodes, and the position between the two electrodes is uncertain, which has an adverse effect on the discharge treatment effect; in addition, the built-in probe is large in size, it is not convenient to adjust the direction in the airway, and it is not possible to perform secondary and multiple ablations continuously. The monopolar ablation probe can only be completely removed from the patient's body, so the single-stage ablation probe has fewer single ablation sites, a limited single ablation treatment range, low ablation efficiency, and multiple ablation operations are cumbersome and inconvenient. There is also an ablation catheter with two electrodes in the prior art, but the two electrodes can only be extended and retracted synchronously, and the expansion degree of the two electrodes is fixed, and the size of the expansion of the two electrodes cannot be adjusted separately according to actual conditions. Moreover, when this dual-electrode structure design is currently used in the airway, the latter electrode will block the operator's observation of the former electrode, and the two electrodes are synchronized, which is not conducive to microscopic adjustment. In summary, the dual-electrode ablation catheters currently available on the market cannot meet actual clinical needs. Summary of the invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a dual-electrode ablation head to solve the problems of the existing monopolar ablation probe having a small ablation treatment range, low ablation efficiency, the independent electrodes set outside the body affecting the ablation effect, and the two electrodes of the existing bipolar ablation probe being unable to independently adjust the expansion size, resulting in a failure to meet actual clinical needs.

[0006] The object of the present invention is achieved in that:

[0007] A dual-electrode ablation head, comprising:

[0008] handle;

[0009] A pipeline assembly connected to the handle;

[0010] A first electrode network is provided at the front end of the pipeline assembly;

[0011] a second electrode mesh, disposed on the pipeline assembly behind the first electrode mesh;

[0012] Among them, the handle is provided with an independently controlled first drive mechanism and a second drive mechanism; the first drive mechanism has a dial knob, and the contraction and expansion of the first electrode net are achieved by pushing and pulling the dial knob, and the expansion size is adjustable; the second drive mechanism has a screwing component, and the contraction and expansion of the second electrode net are achieved by rotating the screwing component, and the expansion size is adjustable; and the first electrode net and the second electrode net in the contracted and expanded states are both exposed outside the pipeline assembly.

[0013] Furthermore, the pipeline assembly includes a central shaft, a fixed outer sleeve assembly, an inner sleeve and a movable outer sleeve; wherein the inner sleeve is sleeved on the central shaft, and the tail of the inner sleeve is fixed in the handle; the front end of the central shaft is fixedly connected to the front end of the first electrode net, and the tail end of the central shaft is fixedly connected to the dial knob; the fixed outer sleeve assembly is fixedly sleeved outside the inner sleeve, and fixes the front end of the second electrode net and the tail end of the first electrode net; the movable outer sleeve is movably sleeved outside the inner sleeve, the head of the movable outer sleeve is fixedly connected to the tail end of the second electrode net, and the tail of the movable outer sleeve is connected to the screw assembly; the central shaft is driven to move back and forth in a straight line along the axial direction by toggling the dial knob to achieve the contraction and expansion of the first electrode net; the movable outer sleeve is caused to move back and forth in a straight line along the axial direction by rotating the screw assembly to achieve the contraction and expansion of the second electrode net.

[0014] Furthermore, the fixed outer sleeve assembly comprises a fixed outer sleeve one and a fixed outer sleeve two, and an inter-tube cavity is provided between the outer wall of the fixed outer sleeve one and the inner wall of the inner sleeve; the tail end of the first electrode net is fixed in the inter-tube cavity; the tube wall of the movable outer sleeve is provided with an inner wall cavity, and the inner wall cavity is arranged parallel to the axis of the movable outer sleeve; the tail end of the second electrode net is fixed in the inner wall cavity.

[0015] Furthermore, the knob is movably arranged at the tail of the handle and can reciprocate along the axial direction of the handle.

[0016] Furthermore, the screwing assembly includes a knob, an inner gear sleeve, an outer gear sleeve and a guide rail; the knob is located at the front end of the handle, the knob is fixedly connected to the inner gear sleeve, and the inner gear sleeve is rotatably arranged in the handle; the movable outer sleeve is fixedly connected to the outer gear sleeve, the outer gear sleeve is arranged in the inner gear sleeve, the inner teeth of the inner gear sleeve are meshed with the outer teeth of the outer gear sleeve, the outer gear sleeve is slidably arranged on the guide rail, and the outer gear sleeve can make a linear reciprocating movement along the axis of the handle during rotation under the restriction of the guide rail; the tail end of the movable outer sleeve is fixedly connected to the outer gear sleeve; when the knob is rotated, by driving the inner gear sleeve to rotate, the outer gear sleeve makes a linear reciprocating movement on the guide rail while rotating, thereby driving the movable outer sleeve to move, and then realizing the contraction and expansion of the second electrode network.

[0017] Furthermore, the outer gear sleeve is provided with a sliding through hole and an extended fixing portion, the extended fixing portion is provided with a fixed through hole, the center line of the fixed through hole coincides with the axis of the handle; the fixed through hole is used for the movable outer sleeve to pass through and fix the movable outer sleeve; the guide rail is slidably arranged in the sliding through hole.

[0018] Furthermore, the overall shape of the sliding through hole is U-shaped, and the outer wall surface of the guide rail is an arc surface, which is adapted to the inner wall surface of the sliding through hole; the guide rail is provided with a groove, and the surface of the extended fixing portion is in sliding contact with the groove wall surface of the groove.

[0019] Furthermore, the tail end of the inner sleeve is fixedly connected to the tail end of the guide rail through a fixed adapter tube.

[0020] Furthermore, the handle has a shell, and the inner gear sleeve is rotatably disposed in the shell.

[0021] Furthermore, a limiting portion is provided on the inner wall of the outer shell, and a protruding portion is provided on the outer wall of the inner gear sleeve. The limiting portion cooperates with the protruding portion so that the inner gear sleeve and the outer shell can only rotate relative to each other, and the inner gear sleeve cannot move along the axial direction of the handle.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] (1) The dual-electrode ablation head provided by the present invention is integrated with two electrodes. The two electrode nets can expand and contract independently. The expansion size is adjustable and easy to operate. After expansion, they can better fit the inner wall of airways of different sizes and can meet the ablation needs of airways of different sizes. Moreover, since the two electrode nets can independently adjust the expansion size, they can be reduced in size and then adjusted in direction in the airway to move to the next position that needs ablation. A single implantation ablation can continuously perform ablation of multiple lesion locations, with more precise control of the treatment range.

[0024] (2) In the dual-electrode ablation head provided by the present invention, the distance between the two electrodes is short. The distance between the centers of the two electrodes will fluctuate within a small range when the two electrode nets are expanded, but the distance and position relationship between the two electrode nets are basically determined, which can ensure that the discharge effect of the two electrodes is consistent each time, thereby ensuring the discharge ablation treatment effect.

[0025] (3) In the dual-electrode ablation head provided by the present invention, the first electrode net and the second electrode net are exposed outside the pipeline assembly in both the contracted and expanded states. This structural setting can discharge and perform ablation when the two electrode nets are in a fully contracted state, thereby achieving ablation in narrow airway spaces.

[0026] (4) The two electrodes of the present invention can be opened and expanded in steps, which is easy to adjust. The opening of the latter electrode does not affect the operator's observation of the position of the former electrode.

[0027] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0029] Figure 1 Schematic diagram of the structure of a dual-electrode ablation head in an embodiment of the present invention;

[0030] Figure 2 It is a disassembly schematic diagram of a dual-electrode ablation head in an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the internal structure of the dual-electrode ablation head in an embodiment of the present invention Figure 1 ;

[0032] Figure 4 A cross-sectional schematic diagram of a first electrode mesh and a second electrode mesh of a dual-electrode ablation head in an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the assembly structure of the fixed outer sleeve assembly, the inner sleeve and the movable outer sleeve of the dual-electrode ablation head in an embodiment of the present invention;

[0034] Figure 6 A partial cross-sectional view of the handle of the dual-electrode ablation head according to an embodiment of the present invention Figure 1 ;

[0035] Figure 7 A partial cross-sectional view of the handle of the dual-electrode ablation head according to an embodiment of the present invention Figure 2 ;

[0036] Figure 8 Schematic diagram of the internal structure of the handle of the dual-electrode ablation head in an embodiment of the present invention Figure 2 ;

[0037] Fig. 9 It is a schematic structural diagram of a first driving mechanism and a second driving mechanism of a dual-electrode ablation head in an embodiment of the present invention;

[0038] Fig.10 It is a disassembled schematic diagram of the first driving mechanism and the second driving mechanism of the dual-electrode ablation head in an embodiment of the present invention;

[0039] Fig.11It is a schematic diagram of the assembly structure of the outer tooth sleeve, the inner sleeve and the movable outer sleeve of the dual-electrode ablation head in an embodiment of the present invention;

[0040] Fig.12 Schematic diagram of the structure of the outer tooth sleeve of the dual-electrode ablation head in an embodiment of the present invention;

[0041] Fig.13 Schematic diagram of the structure of the first electrode network of the dual-electrode ablation head in an embodiment of the present invention;

[0042] Fig.14 Schematic diagram of the structure of the second electrode network of the dual-electrode ablation head in an embodiment of the present invention.

[0043] Reference numerals:

[0044] 1-first electrode net; 11-head tube; 12-tail tube; 13-first electrode wire; 2-second electrode net; 21-second electrode wire; 211-circular ring; 212-insertion section; 3-handle; 31-housing; 311-limiting part; 4-first driving mechanism; 41-dial knob; 42-movable seat; 43-bracket; 5-second driving mechanism; 51-knob; 52-inner gear sleeve; 521-protrusion; 53-outer gear sleeve; 531-sliding through hole; 532-extended fixing part; 533-fixed through hole; 54-guide rail; 541-groove; 5411-front groove; 5412-rear groove; 55-fixed transfer tube; 6-central axis; 7-fixed outer sleeve assembly; 71-fixed outer sleeve one; 711-inter-tube cavity; 72-fixed outer sleeve two; 8-inner sleeve; 9-movable outer sleeve; 91-tube inner wall cavity; 10. Soft rubber guide head. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0046] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection, which can be a mechanical connection, or an electrical connection, which can be a direct connection, or can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0048] The common working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal plane and used on the horizontal plane, and "high and low" and "up and down" are defined in this way.

[0049] Example 1

[0050] A specific embodiment of the present invention, as Figures 1 to 14 As shown, a dual-electrode ablation head is disclosed, comprising:

[0051] Handle 3;

[0052] A pipeline assembly connected to the handle 3;

[0053] A first electrode mesh 1 is provided at the front end of the pipeline assembly;

[0054] The second electrode net 2 is arranged on the pipeline assembly behind the first electrode net 1, and the second electrode net 2 is located between the first electrode net 1 and the handle 3;

[0055] Among them, the expansion sizes of the first electrode net 1 and the second electrode net 2 can be adjusted independently; the handle 3 is provided with an independently controlled first drive mechanism 4 and a second drive mechanism 5; the first drive mechanism 4 has a dial knob 41, and the first electrode net 1 is contracted and expanded by pushing and pulling the dial knob 41, and the expansion size is adjustable; the second drive mechanism 5 has a screwing component, and the second electrode net 2 is contracted and expanded by rotating the screwing component, and the expansion size is adjustable; and the first electrode net 1 and the second electrode net 2 in the contracted and expanded states are exposed outside the pipeline assembly.

[0056] In this embodiment, the first electrode mesh 1 and the second electrode mesh 2 are both in an exposed state whether in a contracted state or an expanded state. The reason for this structural setting is that if the electrode mesh in the contracted state is stored and hidden, ablation cannot be performed in the contracted state, and discharge ablation can only be performed in the expanded state, which requires a large airway space size and cannot perform ablation of a narrow-sized airway. The first electrode mesh 1 and the second electrode mesh 2 of this embodiment are also in an exposed state in a fully contracted state, and discharge ablation can also be performed, so that a narrower airway can be ablated in a smaller size.

[0057] In this embodiment, the pipeline assembly includes a central shaft 6, a fixed outer sleeve assembly 7, an inner sleeve 8 and a movable outer sleeve 9; wherein the inner sleeve 8 is sleeved on the central shaft 6, and the tail of the inner sleeve 8 is fixed in the handle 3; the front end of the central shaft 6 is fixedly connected to the front end of the first electrode net 1, and the tail end of the central shaft 6 is fixedly connected to the dial knob 41; the fixed outer sleeve assembly 7 is fixedly sleeved outside the inner sleeve 8, and fixes the front end of the second electrode net 2 and the tail end of the first electrode net 1; the movable outer sleeve 9 is movably sleeved outside the inner sleeve 8, the head of the movable outer sleeve 9 is fixedly connected to the tail end of the second electrode net 2, and the tail of the movable outer sleeve 9 is connected to the screw assembly; when controlling the contraction or expansion of the two electrode nets, the central shaft 6 is driven to move back and forth in a straight line along the axial direction by toggling the dial knob 41, so as to realize the contraction and expansion of the first electrode net 1; the movable outer sleeve 9 is made to move back and forth in a straight line along the axial direction by rotating the screw assembly, so as to realize the contraction and expansion of the second electrode net 2.

[0058] In one of the optional embodiments, the fixed outer sleeve assembly 7 has a fixed outer sleeve 1 71 and a fixed outer sleeve 2 72, and there is an inter-tube cavity 711 between the outer wall of the fixed outer sleeve 1 71 and the inner wall of the inner sleeve 8; the tail end of the first electrode network 1 is fixed in the inter-tube cavity 711; the tube wall of the movable outer sleeve 9 is provided with a tube inner wall cavity 91, and the tube inner wall cavity 91 is arranged parallel to the axis of the movable outer sleeve 9; the tail end of the second electrode network 2 is fixed in the tube inner wall cavity 91.

[0059] In this embodiment, the dial knob 41 of the first driving mechanism 4 is movably disposed at the tail of the handle 3, and can reciprocate along the axial straight line of the handle 3, and the expansion size of the first electrode network 1 is achieved by toggling the dial knob 41 to a certain distance of forward and backward movement. Specifically, the first driving mechanism 4 includes a dial knob 41, a movable seat 42 and a bracket 43, the dial knob 41 is fixedly connected to the movable seat 42, the movable seat 42 is slidably disposed in the sliding space of the bracket 43, the bracket 43 is fixed in the housing of the handle 3, the movable seat 42 is connected to the tail end of the central shaft 6, and a part of the dial knob 41 is located outside the housing of the handle 3 for finger toggling.

[0060] In this embodiment, the second driving mechanism 5 converts the rotational force into a linear driving force by a power transmission mechanism through a rotation operation, that is, the second driving mechanism 5 realizes a linear drive of the movable outer sleeve 9 through a rotation operation, and controls the expansion size of the second electrode mesh 2 by the size of the rotation angle. Specifically, the screwing assembly includes a knob 51 and a power transmission mechanism, and the power transmission mechanism includes an inner gear sleeve 52, an outer gear sleeve 53 and a guide rail 54; the axes of the handle 3, the central shaft 6, the inner sleeve 8 and the movable outer sleeve 9 coincide, and the knob 51, the inner gear sleeve 52, the outer gear sleeve 53 and the guide rail 54 are all sleeved on the outside of the movable outer sleeve 9. Specifically, the guide rail 54 is sleeved on the outside of the movable outer sleeve 9, the outer gear sleeve 53 is sleeved on the guide rail 54, and the inner gear sleeve 52 is sleeved on the outer gear sleeve 53; the knob 51 is located in front of the inner gear sleeve 52 and is fixedly connected to the inner gear sleeve 52; the knob 51 is located at the front end of the handle 3, and the knob 51 is rotatably arranged on the guide rail At the front end of the handle 54, the knob 51 is fixedly connected to the inner gear sleeve 52, the inner gear sleeve 52 is rotatably arranged in the handle 3, and can only rotate around the axis of the handle 3, and cannot move along the axis of the handle 3; the movable outer sleeve 9 is fixedly connected to the outer gear sleeve 53, the outer gear sleeve 53 is arranged in the inner gear sleeve 52, the inner teeth of the inner gear sleeve 52 are meshed with the outer teeth of the outer gear sleeve 53, the outer gear sleeve 53 is slidably arranged on the guide rail 54, and the outer gear sleeve 53 can make a linear reciprocating movement along the axis of the handle 3 during the rotation process under the restriction of the guide rail 54; the tail end of the movable outer sleeve 9 is fixedly connected to the outer gear sleeve 53. When the knob 51 is rotated, the inner gear sleeve 52 is driven to rotate, so that the outer gear sleeve 53 makes a linear reciprocating movement on the guide rail 54 while rotating, thereby driving the movable outer sleeve 9 to move, and then realizing the contraction and expansion of the second electrode network.

[0061] In this embodiment, the outer gear sleeve 53 is provided with a sliding through hole 531 and an extended fixing portion 532, and the extended fixing portion 532 is provided with a fixed through hole 533, and the center line of the fixed through hole 533 coincides with the axis of the handle 3; the fixed through hole 533 is used for the movable outer sleeve 9 to pass through and fix the movable outer sleeve 9; the guide rail 54 is slidably arranged in the sliding through hole 531.

[0062] Exemplarily, the shape of the sliding through hole 531 is U-shaped as a whole, the outer wall surface of the guide rail 54 is an arc surface, which is adapted to the inner wall surface of the U-shaped sliding through hole 531, and the arc outer wall surface of the guide rail 54 is in sliding contact with the inner wall surface of the sliding through hole 531; the guide rail 54 is provided with a groove 541, and the surface of the extended fixing portion 532 is in sliding contact with the groove wall surface of the groove 541. This structural setting enables the outer gear sleeve 53 to move smoothly and linearly on the guide rail 54.

[0063] In one of the optional embodiments, the tail end of the inner sleeve 8 is fixedly connected to the tail end of the guide rail 54 through a fixed adapter tube 55. Exemplarily, the groove 541 on the guide rail 54 includes two sections, namely a front section groove 5411 and a rear section groove 5412, the surface of the extended fixing portion 532 is in sliding contact with the groove wall surface of the front section groove 5411, the length of the front section groove 5411 is the sliding movement range of the outer gear sleeve 53, and the rear section groove 5412 is used to install and fix the adapter tube 55.

[0064] In this embodiment, the handle 3 has a shell 31, the inner wall of the shell 31 is provided with a limiting portion 311, the outer wall of the inner gear sleeve 52 is provided with a protrusion, the limiting portion 311 cooperates with the protrusion, so that the inner gear sleeve 52 and the shell 31 can only rotate relative to each other, and the inner gear sleeve 52 cannot move along the axis direction of the handle 3. Optionally, the limiting portion 311 can form a groove on the inner wall of the shell 31, and the protrusion can be installed in the groove; illustratively, the protrusion is an annular protrusion, and the groove is an annular groove, and the annular protrusion and the annular groove have structural dimensions that match each other, and the two can rotate relative to each other.

[0065] In this embodiment, the structures of the first electrode mesh 1 and the second electrode mesh 2 are different. In the initial state, the first electrode mesh 1 and the second electrode mesh 2 are both in a fully contracted state. The length of the first electrode mesh 1 in the initial state is 10.4 mm, and the outer diameter of the first electrode mesh 1 when expanded is within a range of 2.5-5 mm. The length of the second electrode mesh 2 in the initial state is 10 mm, and the outer diameter of the second electrode mesh 2 when expanded is within a range of 2.5-8 mm.

[0066] like Fig.13 As shown, the first electrode network 1 has a head tube 11, a tail tube 12 and a plurality of first electrode wires 13, the plurality of first electrode wires 13 are connected between the head tube 11 and the tail tube 12, the head tube 11 is fixed to the front end of the central shaft 6, and the tail tube 12 is inserted and fixed in the inter-tube cavity 711 between the fixed outer sleeve 71 and the inner sleeve 8.

[0067] Furthermore, a soft rubber guide head 10 is sleeved on the head tube 11 of the first electrode mesh 1 .

[0068] like Fig.14 As shown, the second electrode mesh 2 has four second electrode wires 21, the first ends of the second electrode wires 21 have an insertion section 212, the second ends of the second electrode wires 21 have a ring 211, the insertion section 211 is inserted into and fixed in the inner wall cavity 91 of the movable outer sleeve 9, the ring 211 is sleeved on the inner sleeve 8, and is fixed at a designated position on the inner sleeve 8 by the fixed outer sleeve 1 71 and the fixed outer sleeve 2 72 of the fixed outer sleeve assembly 7.

[0069] Furthermore, the second electrode net 2 has two circular rings 211, and two second electrode wires 21 are connected to the same circular ring 211. The second electrode net of this structure has a simple structure, is easy to assemble, and has low cost.

[0070] It should be noted that the dual-motor ablation head in this embodiment also includes some other necessary components, which cooperate with the various components in this embodiment to ensure the normal operation of the dual-motor ablation head, which can be achieved using existing technology and will not be repeated here. For example, the pipeline assembly also includes a first electrode wire connected to the first electrode network and a second electrode wire connected to the second electrode network 2.

[0071] During implementation, in the initial state, the first electrode mesh 1 and the second electrode mesh 2 are both in a fully contracted state. The fully contracted first electrode mesh 1 and the second electrode mesh 2 are implanted into the designated part of the trachea to be ablated. When the designated position is reached, the knob 41 is pulled backward to expand the first electrode mesh 1, and the knob 41 is pushed forward to gradually reduce the expanded first electrode mesh 1 from the expanded state to the fully contracted state, until the expanded first electrode mesh 1 is adjusted to a suitable size; the screwing assembly is rotated counterclockwise to expand the second electrode mesh 2, and the screwing assembly is rotated clockwise to gradually reduce the second electrode mesh 2 from the expanded state to the fully contracted state, until the expanded second electrode mesh 2 is adjusted to a suitable size. When the expansion state of the two electrode meshes is adjusted, the discharge ablation operation is started to ablate the target area in the trachea. After completing ablation at one location, push the dial knob 41 forward to restore the first electrode mesh 1 to a fully contracted state, rotate the screw assembly clockwise to restore the second electrode mesh 2 to a fully contracted state, and then move the two electrode meshes in the trachea to the next location that needs to be ablated, and adjust the first electrode mesh 1 and the second electrode mesh 2 to an expanded state again to ablate the location. Repeating the above operations can achieve sequential ablation of multiple locations in the trachea. When the location to be ablated is in a narrow trachea, adjust the two electrode meshes to a fully contracted state, and perform discharge ablation in the fully contracted state.

[0072] Compared with the prior art, the dual-electrode ablation head provided in this embodiment can achieve the following beneficial effects:

[0073] (1) Two electrodes are integrated, and the two electrode nets can expand and contract independently. The expansion size is adjustable and easy to operate. After expansion, they can better fit the inner wall of airways of different sizes and can meet the ablation needs of airways of different sizes. Moreover, since the two electrode nets can independently adjust the expansion size, they can be reduced in size and then adjusted in direction in the airway to move to the next position that needs ablation. A single implant ablation can continuously ablate multiple lesion locations, with more precise control of the treatment range.

[0074] (2) The distance between the two electrodes is short. The distance between their centers will fluctuate within a small range when the two electrode nets are expanded. However, the distance and position relationship between the two electrode nets are basically determined, which can ensure that the discharge effect of the two electrodes is consistent each time, thereby ensuring the effect of discharge ablation treatment.

[0075] (3) The two electrode meshes are small in size, and the first electrode mesh and the second electrode mesh are exposed outside the pipeline assembly in both the contracted and expanded states. This structural setting enables discharge and ablation when the two electrode meshes are in a fully contracted state, so that ablation of narrower airways can be performed with a smaller size.

[0076] (4) The two electrodes can be opened and expanded in steps, which is easy to adjust. The opening of the latter electrode does not affect the operator's observation of the position of the former electrode.

[0077] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A dual-electrode ablation head, characterized in that: include: handle; A pipeline assembly connected to the handle; A first electrode network is provided at the front end of the pipeline assembly; a second electrode mesh, disposed on the pipeline assembly behind the first electrode mesh; The handle is provided with a first driving mechanism and a second driving mechanism which are independently controlled; the first driving mechanism has a dial knob, which is pushed and pulled to realize the contraction and expansion of the first electrode net, and the expansion size is adjustable; the second driving mechanism has a screwing assembly, which is rotated to realize the contraction and expansion of the second electrode net, and the expansion size is adjustable; and the first electrode net and the second electrode net in the contracted and expanded states are both exposed outside the pipeline assembly; The pipeline assembly includes a central shaft, a fixed outer sleeve assembly, an inner sleeve and a movable outer sleeve; Wherein, the inner sleeve is sleeved on the central shaft, and the tail of the inner sleeve is fixed in the handle; the front end of the central shaft is fixedly connected to the front end of the first electrode net, and the tail end of the central shaft is fixedly connected to the dial knob; the fixed outer sleeve assembly is fixedly sleeved outside the inner sleeve, and fixes the front end of the second electrode net and the tail end of the first electrode net; the movable outer sleeve is movably sleeved outside the inner sleeve, the head of the movable outer sleeve is fixedly connected to the tail end of the second electrode net, and the tail of the movable outer sleeve is connected to the screw assembly; The central shaft is driven to move linearly back and forth along the axial direction by turning the knob to achieve the contraction and expansion of the first electrode network; the movable outer sleeve is driven to move linearly back and forth along the axial direction by rotating the screw assembly to achieve the contraction and expansion of the second electrode network.

2. The dual-electrode ablation head according to claim 1, characterized in that: The fixed outer sleeve assembly comprises a fixed outer sleeve 1 and a fixed outer sleeve 2, and an inter-tube cavity is provided between the outer wall of the fixed outer sleeve 1 and the inner wall of the inner sleeve; the tail end of the first electrode mesh is fixed in the inter-tube cavity; The tube wall of the movable outer sleeve is provided with a tube inner wall cavity, and the tube inner wall cavity is arranged parallel to the axis of the movable outer sleeve; the tail end of the second electrode mesh is fixed in the tube inner wall cavity.

3. The dual-electrode ablation head according to claim 1, characterized in that: The dial knob is movably arranged at the tail of the handle and can reciprocate along the axial direction of the handle.

4. The dual-electrode ablation head according to claim 1, characterized in that: The screwing assembly comprises a knob, an inner gear sleeve, an outer gear sleeve and a guide rail; The knob is located at the front end of the handle, and the knob is fixedly connected to the inner gear sleeve, and the inner gear sleeve is rotatably arranged in the handle; the movable outer sleeve is fixedly connected to the outer gear sleeve, and the outer gear sleeve is arranged in the inner gear sleeve, and the inner teeth of the inner gear sleeve are meshed with the outer teeth of the outer gear sleeve, and the outer gear sleeve is slidably arranged on the guide rail, and the outer gear sleeve can make a linear reciprocating movement along the axis of the handle during the rotation process under the restriction of the guide rail; the tail end of the movable outer sleeve is fixedly connected to the outer gear sleeve; When the knob is rotated, the inner gear sleeve is driven to rotate, so that the outer gear sleeve makes a linear reciprocating movement on the guide rail while rotating, thereby driving the outer sleeve to move, thereby realizing the contraction and expansion of the second electrode network.

5. The dual-electrode ablation head according to claim 4, characterized in that: The outer gear sleeve is provided with a sliding through hole and an extended fixing portion, the extended fixing portion is provided with a fixed through hole, the center line of the fixed through hole coincides with the axis of the handle; the fixed through hole is used for the movable outer sleeve to pass through and fix the movable outer sleeve; the guide rail is slidably arranged in the sliding through hole.

6. The dual-electrode ablation head according to claim 5, characterized in that: The overall shape of the sliding through hole is U-shaped, and the outer wall surface of the guide rail is an arc surface, which is adapted to the inner wall surface of the sliding through hole; the guide rail is provided with a groove, and the surface of the extended fixing part is in sliding contact with the groove wall surface of the groove.

7. The dual-electrode ablation head according to claim 6, characterized in that: The tail end of the inner sleeve is fixedly connected to the tail end of the guide rail through a fixed adapter tube.

8. The dual-electrode ablation head according to any one of claims 4 to 7, characterized in that: The handle has a shell, and the inner gear sleeve is rotatably arranged in the shell.

9. The dual-electrode ablation head according to claim 8, characterized in that: The inner wall of the outer shell is provided with a limiting part, and the outer wall of the inner gear sleeve is provided with a protruding part. The limiting part cooperates with the protruding part so that the inner gear sleeve and the outer shell can only rotate relative to each other.

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