Dual-electrode ablation head
By designing an independently adjustable dual-electrode ablation head, the problems of small treatment range and low efficiency of existing ablation probes are solved, and continuous ablation and precise treatment of multiple lesion locations are achieved, adapting to different airway sizes and reducing the impact on normal tissues.
Patent Information
- Application Number
- CN202422494619.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing unipolar ablation probes have a small ablation treatment range and low efficiency, and bipolar ablation probe electrodes cannot be adjusted independently, which affects the treatment effect and operational convenience.
A dual-electrode ablation head is designed, comprising a first electrode mesh and a second electrode mesh, which are expanded and contracted by independent driving mechanisms respectively. The expansion size is adjustable, and discharge ablation can be performed in the contracted state.
It achieves continuous ablation of multiple lesion locations and precise control of the treatment range. The electrode network can ablate in narrow airways when in a contracted state. It is easy to operate and reduces the impact on normal tissues.
Smart Images
Figure CN223464098U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially, relate to a double electrode ablation head. BACKGROUND
[0002] Chronic obstructive pulmonary disease (abbreviation chronic obstructive pulmonary disease) is a chronic airway inflammatory disease with progressive airflow limitation as the characteristic, and the main symptom is long-term cough expectoration and dyspnea, the morbidity increases with age, and the social and economic burden related to acute exacerbation is huge. Chronic obstructive pulmonary disease acute exacerbation and various complications always accompany the course, and seriously influence the prognosis of patients. Chronic airway mucus hypersecretion is the main pathophysiological characteristic of chronic obstructive pulmonary disease, and is clinically manifested as chronic cough expectoration. Mucus production increases and cilia clearance dysfunction can lead to respiratory tract mucus accumulation, form sputum embolism, and severe sputum obstruction can endanger life. The mechanism of chronic airway mucus hypersecretion is that airway epithelial mucus glands and goblet cells secrete excessive mucus.
[0003] Pulse electric field ablation technology is a technology that utilizes high-voltage discharge to cause irreversible electroporation of cells, which can directly act on cells to cause apoptosis and thus achieve a therapeutic purpose. Specifically, the short-time, high-voltage electric pulses generated by pulse electric field ablation technology can induce electroporation of cells, thereby changing the permeability of their membranes and leading to cell death. This method is referred to as non-thermal cautery because it does not rely on the generation of high heat to kill cells, and thus can greatly reduce damage to surrounding normal tissue. In addition, no tissue scabbing occurs during or after the procedure, so when applied to the trachea of the lung, it does not affect the normal function of the trachea. Finally, the mechanism by which irreversible electroporation causes cell death is apoptosis, rather than necrosis. Apoptosis is a programmed death process, and phagocytes remove apoptotic cells as a normal cell death process, thereby promoting the regeneration and repair of normal tissue. Therefore, after treatment by irreversible electroporation, the treated area can be replaced by normal cells in a short period of time, thereby restoring the original function.
[0004] The existing pulsed electric field technology used for COPD patients is all monopolar ablation probes. 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, and it is not convenient to adjust the direction in the airway. It cannot perform secondary or multiple ablations continuously, and the monopolar ablation probe can only be completely removed from the patient's body. Therefore, the single-stage ablation probe has a small number of 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. The expansion size 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. Utility Model Content
[0005] In view of the above analysis, the embodiment of the present invention aims to provide a dual-electrode ablation head to solve 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 inability of the two electrodes of the existing bipolar ablation probe to independently adjust the expansion size, resulting in failure to meet actual clinical needs.
[0006] The purpose of this utility model is achieved in this way:
[0007] A dual-electrode ablation head includes a first electrode mesh, a second electrode mesh, a first drive mechanism, and a second drive mechanism; wherein the first electrode mesh and the second electrode mesh are arranged on a pipeline assembly, and the pipeline assembly connects the first drive mechanism and the second drive mechanism; the first drive mechanism has a dial knob, and the first electrode mesh is contracted and expanded by pushing and pulling the dial knob; the second drive mechanism has a screwing assembly, and the second electrode mesh is contracted and expanded by rotating the screwing assembly.
[0008] Furthermore, it also includes a handle, the tail end of the pipeline assembly is connected to the handle, and the first drive mechanism and the second drive mechanism are arranged on the handle.
[0009] Further, the pipeline assembly comprises a central shaft, a fixed outer sleeve assembly, an inner sleeve and a movable outer sleeve; 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 with the front end of the first electrode net, and the tail end of the central shaft is fixedly connected with the knob; the fixed outer sleeve assembly is fixedly sleeved outside the inner sleeve, and the front end of the second electrode net and the tail end of the first electrode net are fixed; the movable outer sleeve is movably sleeved outside the inner sleeve, the head of the movable outer sleeve is fixedly connected with the tail end of the second electrode net, and the tail of the movable outer sleeve is connected with the screwing assembly.
[0010] Further, the fixed outer sleeve assembly comprises a fixed outer sleeve one and a fixed outer sleeve two, and the outer wall of the fixed outer sleeve one and the inner wall of the inner sleeve have an inter-tube cavity; 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 a tube inner wall cavity, and the tail end of the second electrode net is fixed in the tube inner wall cavity.
[0011] Further, the screwing assembly comprises a knob, an inner tooth sleeve, an outer tooth sleeve and a guide rail; the knob is located at the front end of the handle, the knob is fixedly connected with the inner tooth sleeve, and the inner tooth sleeve is rotatably arranged in the handle; the movable outer sleeve is fixedly connected with the outer tooth sleeve, the outer tooth sleeve is arranged in the inner tooth sleeve, and the inner teeth of the inner tooth sleeve and the outer teeth of the outer tooth sleeve are engaged; the outer tooth sleeve is slidingly arranged on the guide rail and can linearly reciprocate along the guide rail; the tail end of the movable outer sleeve is fixedly connected with the outer tooth sleeve.
[0012] Further, the outer tooth sleeve is provided with a sliding through hole and an extension fixing part, the extension fixing part is provided with a fixing through hole, the center line of the fixing through hole coincides with the axis of the handle; the fixing through hole is used for passing through and fixing the movable outer sleeve; the guide rail is slidingly arranged in the sliding through hole.
[0013] Further, the first electrode net comprises a head tube, a tail tube and a plurality of first electrode wires, the head tube is fixed at the front end of the central shaft, and the tail tube is inserted and fixed in the inter-tube cavity.
[0014] Further, a soft rubber guide head is sleeved on the head tube of the first electrode net.
[0015] Further, the second electrode net comprises four second electrode wires, the first end of the second electrode wire has an insertion section, the second end of the second electrode wire has a circular ring, the insertion section is inserted and fixed in the tube inner wall cavity, and the circular ring is sleeved on the inner sleeve and fixed by the fixed outer sleeve assembly.
[0016] Further, the second electrode net comprises two circular rings, and two second electrode wires are connected to the same circular ring.
[0017] Compared with the prior art, the double-electrode ablation head provided by the utility model, integrated with two electrodes, can independently expand and contract, and the expansion size can be adjusted, which is convenient to operate, can better adhere to the inner walls of air passages of different sizes after expansion, and can meet the ablation of air passages of different sizes; moreover, the two electrode nets can independently adjust the expansion size, can be reduced in size, and can be moved to the next position to be ablated in the air passage, and the single implantation ablation can continuously ablate multiple lesion positions, and has more accurate treatment range control.
[0018] The various technical solutions described above can be combined with each other in the utility model to achieve more preferred combination solutions. Other features and advantages of the utility model will be described in the subsequent specification, and some advantages can become apparent from the specification or can be understood by implementing the utility model. The purpose and other advantages of the utility model can be achieved and obtained through the contents specifically indicated in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings are only used for the purpose of illustrating specific embodiments and are not considered as limiting the utility model, and the same reference signs represent the same parts throughout the drawings.
[0020] Figure 1 It is a cross-sectional view of the first electrode net and the second electrode net in the utility model embodiment;
[0021] Figure 2 It is an assembly structure schematic view of the fixed outer sleeve assembly, the inner sleeve and the movable outer sleeve in the utility model embodiment;
[0022] Figure 3 It is a structure schematic view of the first electrode net in the utility model embodiment;
[0023] Figure 4 It is a structure schematic view of the second electrode net in the utility model embodiment;
[0024] Figure 5 It is a disassembly schematic view of the double-electrode ablation head in the utility model embodiment;
[0025] Figure 6 It is a structure schematic view of the double-electrode ablation head in the utility model embodiment;
[0026] Figure 7 It is an internal structure schematic view of the double-electrode ablation head in the utility model embodiment;
[0027] Figure 8 A partial cross-sectional view of the handle in the embodiment of the utility model Figure 1
[0028] Figure 9 A partial cross-sectional view of the handle in the embodiment of the utility model Figure 2
[0029] Figure 10 A structure diagram of the first driving mechanism and the second driving mechanism in the embodiment of the utility model
[0030] Figure 11 A disassembly diagram of the first driving mechanism and the second driving mechanism in the embodiment of the utility model
[0031] Figure 12 An assembly structure diagram of the outer tooth sleeve, the inner sleeve and the movable outer sleeve in the embodiment of the utility model
[0032] Figure 13 A structure diagram of the outer tooth sleeve in the embodiment of the utility model
[0033] Reference signs:
[0034] 1 - first electrode net; 11 - head pipe; 12 - tail pipe; 13 - first electrode wire; 2 - second electrode net; 21 - second electrode wire; 211 - circular ring; 212 - insertion section; 3 - handle; 31 - shell; 311 - limiting portion; 4 - first driving mechanism; 41 - knob; 42 - movable seat; 43 - support; 5 - second driving mechanism; 51 - knob; 52 - inner tooth sleeve; 521 - protruding portion; 53 - outer tooth sleeve; 531 - sliding through hole; 532 - extension fixing portion; 533 - fixed through hole; 54 - guide rail; 541 - groove; 5411 - front section groove; 5412 - rear section groove; 55 - fixed adapter pipe; 6 - center shaft; 7 - fixed outer sleeve assembly; 71 - fixed outer sleeve one; 711 - pipe cavity; 72 - fixed outer sleeve two; 8 - inner sleeve; 9 - movable outer sleeve; 91 - pipe inner wall cavity; 10, soft glue guide head. DETAILED DESCRIPTION
[0035] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, wherein the drawings form a part of the utility model, and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.
[0036] In the description of the embodiments of the utility model, it needs to explain that, unless another explicit stipulation and limitation, the term "connect" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected can be mechanical connection, also can be electric connection can be direct connection, also can be indirectly connected through the intermediate medium. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.
[0037] The terms "top", "bottom", "above", "under" and "on" used throughout the description are relative to the relative position of the components of the device, for example the relative position of the top and bottom substrates inside the device. It can be understood that the device is multifunctional, regardless of their orientation in space.
[0038] The utility model's general working surface can be plane or curved surface, can be inclined, also can be horizontal. In order to facilitate the explanation, the utility model embodiment is placed on the horizontal plane, and is used on the horizontal plane, and "high and low" and "up and down" are defined accordingly.
[0039] Example 1
[0040] As shown in the specific embodiment of the utility model, Figure 1 , Figure 5 , Figure 6 Disclosed is a double-electrode ablation head, comprising a first electrode net 1, a second electrode net 2, a first driving mechanism 4 and a second driving mechanism 5; wherein the first electrode net 1 and the second electrode net 2 are arranged on a pipeline assembly, and the pipeline assembly is connected to the first driving mechanism 4 and the second driving mechanism 5; the expansion size of the first electrode net 1 and the second electrode net 2 can be adjusted independently, and the expansion size is adjustable; the first driving mechanism 4 has a knob 41, and the knob 41 is operated by pushing and pulling to realize the contraction and expansion of the first electrode net 1; the second driving mechanism 5 has a screwing assembly, and the screwing assembly is operated by rotating to realize the contraction and expansion of the second electrode net 2.
[0041] As shown in the specific embodiment of the utility model, Figures 5 to 9 The double-electrode ablation head further comprises a handle 3, the tail end of the pipeline assembly is connected to the handle 3, and the first driving mechanism 4 and the second driving mechanism 5 are arranged on the handle 3. The first electrode net 1 is arranged at the front end of the pipeline assembly; 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.
[0042] In the embodiment, the first electrode net 1 and the second electrode net 2 are exposed outside the pipeline assembly in both the contracted state and the expanded state. The reason why the first electrode net 1 and the second electrode net 2 are always in the exposed state in the embodiment is that if the electrode net in the contracted state is hidden, the ablation cannot be performed in the contracted state, and the discharge ablation can only be performed in the expanded state, which requires a larger size of the airway space and cannot be used for ablation of narrow airways. The first electrode net 1 and the second electrode net 2 in the embodiment are also in the exposed state in the fully contracted state, and the discharge ablation can be performed, so that the ablation can be performed on narrower airways in a smaller size.
[0043] In the embodiment, the pipeline assembly comprises a central shaft 6, a fixed outer sleeve assembly 7, an inner sleeve 8 and a movable outer sleeve 9. 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 with the front end of the first electrode net 1, and the tail end of the central shaft 6 is fixedly connected with the 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 with the tail end of the second electrode net 2, and the tail of the movable outer sleeve 9 is connected with the screwing assembly. When the two electrode nets are controlled to be contracted or expanded, the central shaft 6 is driven to move linearly along the axial direction to realize the contraction and expansion of the first electrode net 1 by rotating the knob 41. The movable outer sleeve 9 is driven to move linearly along the axial direction to realize the contraction and expansion of the second electrode net 2 by rotating the screwing assembly.
[0044] In one optional embodiment, as shown in Figure 2 The fixed outer sleeve assembly 7 has a fixed outer sleeve one 71 and a fixed outer sleeve two 72. The outer wall of the fixed outer sleeve one 71 and the inner wall of the inner sleeve 8 have a tube cavity 711 therebetween. The tail end of the first electrode net 1 is fixed in the tube cavity 711. The tube wall of the movable outer sleeve 9 is provided with a tube inner wall cavity 91, which is arranged parallel to the axis of the movable outer sleeve 9. The tail end of the second electrode net 2 is fixed in the tube inner wall cavity 91.
[0045] In the embodiment, the first electrode net 1 and the second electrode net 2 have different structures. In the initial state, the first electrode net 1 and the second electrode net 2 are both in the fully contracted state. The length of the first electrode net 1 in the initial state is 10.4 mm, and the outer diameter of the first electrode net 1 expands to a range of 2.5-5 mm. The length of the second electrode net 2 in the initial state is 10 mm, and the outer diameter of the second electrode net 2 expands to a range of 2.5-8 mm.
[0046] As shown in Figure 3As shown, the first electrode net 1 has a head pipe 11, a tail pipe 12 and a plurality of first electrode wires 13, the plurality of first electrode wires 13 are connected between the head pipe 11 and the tail pipe 12, the head pipe 11 is fixed to the front end of the central shaft 6, and the tail pipe 12 is inserted and fixed in the pipe inter-cavity 711 between the fixed outer sleeve pipe one 71 and the inner sleeve pipe 8.
[0047] Further, the head pipe 11 of the first electrode net 1 is sleeved with a soft glue guide head 10.
[0048] As shown, Figure 4 As shown, the second electrode net 2 has four second electrode wires 21, the first end of the second electrode wire 21 has an insertion section 212, and the second end of the second electrode wire 21 has a circular ring 211, the insertion section 211 is inserted and fixed in the pipe inner wall cavity 91 of the moving outer sleeve pipe 9, and the circular ring 211 is sleeved on the inner sleeve pipe 8 and fixed at a specified position on the inner sleeve pipe 8 by the fixed outer sleeve pipe one 71 and the fixed outer sleeve pipe two 72 of the fixed outer sleeve pipe assembly 7.
[0049] Further, 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 is simple in structure, convenient to assemble and low in cost.
[0050] In this embodiment, the knob 41 of the first driving mechanism 4 is movably arranged at the tail of the handle 3 and can move linearly along the axial direction of the handle 3. The forward and backward movement distance of the knob 41 is adjusted to realize the expansion size of the first electrode net 1. Specifically, the first driving mechanism 4 includes the knob 41, a movable seat 42 and a bracket 43. The knob 41 is fixedly connected to the movable seat 42, the movable seat 42 is slidably arranged in the sliding space of the bracket 43, the bracket 43 is fixed in the shell of the handle 3, the movable seat 42 is connected to the tail end of the central shaft 6, and a part of the knob 41 is located outside the shell of the handle 3 for being manually operated.
[0051] In the embodiment, the second driving mechanism 5 converts the rotary force into linear driving force by rotating operation through the power transmission mechanism, that is, the second driving mechanism 5 realizes the linear driving of the moving outer sleeve 9 by rotating operation, and the expansion size of the second electrode net 2 is controlled by the size of the rotating angle. Specifically, the screwing assembly includes a knob 51 and a power transmission mechanism, the power transmission mechanism includes an inner tooth sleeve 52, an outer tooth sleeve 53 and a guide rail 54; the axes of the handle 3, the central shaft 6, the inner sleeve 8 and the moving outer sleeve 9 coincide, the knob 51, the inner tooth sleeve 52, the outer tooth sleeve 53 and the guide rail 54 are all sleeved outside the moving outer sleeve 9, specifically, the guide rail 54 is sleeved outside the moving outer sleeve 9, the outer tooth sleeve 53 is sleeved on the guide rail 54, and the inner tooth sleeve 52 is sleeved on the outer tooth sleeve 53; the knob 51 is located in front of the inner tooth sleeve 52 and is fixedly connected with the inner tooth sleeve 52; the knob 51 is located at the front end of the handle 3, and is rotatably arranged at the front end of the guide rail 54; the knob 51 is fixedly connected with the inner tooth sleeve 52, the inner tooth sleeve 52 is rotatably arranged in the handle 3 and can only rotate around the axis of the handle 3 but cannot move along the axis of the handle 3; the moving outer sleeve 9 is fixedly connected with the outer tooth sleeve 53, the outer tooth sleeve 53 is arranged in the inner tooth sleeve 52, the inner teeth of the inner tooth sleeve 52 are engaged with the outer teeth of the outer tooth sleeve 53, and the outer tooth sleeve 53 is slidably arranged on the guide rail 54 and can move linearly along the axis of the handle 3 during rotation under the restriction of the guide rail 54; the tail end of the moving outer sleeve 9 is fixedly connected with the outer tooth sleeve 53. When the knob 51 is rotated, the inner tooth sleeve 52 is driven to rotate, the outer tooth sleeve 53 moves linearly and reciprocally on the guide rail 54 during rotation, thereby driving the moving outer sleeve 9 to move, and the contraction and expansion of the second electrode net are realized.
[0052] In the embodiment, the outer tooth sleeve 53 is provided with a sliding through hole 531 and an extension fixing part 532, the extension fixing part 532 is provided with a fixing through hole 533, the center line of the fixing through hole 533 coincides with the axis of the handle 3; the fixing through hole 533 is used for passing through and fixing the moving outer sleeve 9; and the guide rail 54 is slidably arranged in the sliding through hole 531.
[0053] For example, the sliding through hole 531 is in the shape of U as a whole, the outer wall surface of the guide rail 54 is in the shape of arc and is matched with the inner wall surface of the U-shaped sliding through hole 531, the arc-shaped outer wall surface of the guide rail 54 is in sliding contact with the inner wall surface of the sliding through hole 531; and the guide rail 54 is provided with a groove 541, the surface of the extension fixing part 532 is in sliding contact with the groove wall surface of the groove 541. The structure can make the outer tooth sleeve 53 move linearly on the guide rail 54 smoothly.
[0054] In one of the optional embodiments, as shown in FIG. 6, the second driving mechanism 5 is provided with a rotating handle 3, a central shaft 6, an inner sleeve 8, a moving outer sleeve 9, a knob 51, an inner tooth sleeve 52, an outer tooth sleeve 53 and a guide rail 54. Figure 7 , Figures 9 to 13As shown, the tail end of the inner sleeve 8 is fixedly connected to the tail of the guide rail 54 through the fixed adapter pipe 55. Exemplarily, the groove 541 on the guide rail 54 includes two sections, i.e., a front section groove 5411 and a rear section groove 5412, the surface of the extension fixing part 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 tooth sleeve 53, and the rear section groove 5412 is used for installing the fixed adapter pipe 55.
[0055] In this embodiment, the handle 3 has a shell 31, the inner wall of the shell 31 is provided with a limiting part 311, the outer wall of the inner tooth sleeve 52 is provided with a protruding part, the limiting part 311 cooperates with the protruding part to enable the inner tooth sleeve 52 to only rotate relative to the shell 31, and the inner tooth sleeve 52 cannot move along the axis direction of the handle 3. Optionally, the limiting part 311 can form a clamping groove on the inner wall of the shell 31, and the protruding part can be fitted into the clamping groove; exemplarily, the protruding part is a ring-shaped protrusion, the clamping groove is a ring groove, the ring-shaped protrusion and the ring groove are matched in structure size, and the ring-shaped protrusion and the ring groove can rotate relative to each other.
[0056] It should be noted that the double-motor ablation head in this embodiment further includes other necessary components which cooperate with the components in this embodiment to ensure normal operation of the double-motor ablation head, and the existing technology can be used to realize this, which will not be described here. For example, the pipeline assembly further includes a first electrode lead connected with the first electrode net and a second electrode lead connected with the second electrode net 2.
[0057] In implementation, in the initial state, the first electrode net 1 and the second electrode net 2 are both in the completely contracted state, the first electrode net 1 and the second electrode net 2 in the completely contracted state are implanted into the specified part of the trachea to be ablated, when the specified position is reached, the knob 41 is pulled backward to expand the first electrode net 1, the knob 41 is pushed forward to gradually reduce the expanded first electrode net 1 from the expanded state to the completely contracted state until the first electrode net 1 is adjusted and controlled to the appropriate size after expansion; the screwing assembly is counterclockwise rotated to expand the second electrode net 2, the screwing assembly is clockwise rotated to gradually reduce the second electrode net 2 from the expanded state to the completely contracted state until the second electrode net 2 is adjusted and controlled to the appropriate size after expansion. When the expansion state adjustment of the two electrode nets is completed, the discharge ablation operation is started to ablate the target area in the trachea. When the ablation at one place is completed, the knob 41 is pushed forward to restore the first electrode net 1 to the completely contracted state, the screwing assembly is clockwise rotated to restore the second electrode net 2 to the completely contracted state, and then the two electrode nets are moved to the next position in the trachea which needs to be ablated, and the first electrode net 1 and the second electrode net 2 are adjusted to the expanded state again to ablate the position. The above operation is repeated to realize the sequential ablation of multiple positions in the trachea. When the position to be ablated is in a narrow and small size trachea, the two electrode nets are adjusted to the completely contracted state, and the discharge ablation is performed in the completely contracted state.
[0058] Compared with the prior art, the double-electrode ablation head provided by the embodiment can achieve the following beneficial effects:
[0059] (1) The two electrode nets can be independently expanded and contracted, and the expansion size can be adjusted, which is convenient to operate, can better fit the inner wall of airways of different sizes after expansion, and can meet the ablation of airways of different sizes; moreover, the two electrode nets can be independently adjusted in size, can be reduced in size, and can be adjusted in direction in the airway to move to the next position to be ablated, so that the single implantation ablation can continuously ablate multiple lesion positions, and has more precise treatment range control.
[0060] (2) The distance between the two electrodes is short, the distance between the centers of the two electrodes will have a small range fluctuation in the expanded state of the two electrode nets, but the distance and positional 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.
[0061] (3) The size of the two electrode nets is small, and the first electrode net and the second electrode net in the contracted and expanded states are exposed outside the pipeline assembly, so that the ablation can be performed by discharging when the two electrode nets are in the completely contracted state, so that the ablation of narrower airways can be performed in a smaller size.
[0062] (4) The two electrodes can be opened and expanded in steps, which is easy to adjust, and the opening of the latter electrode does not affect the observation of the position of the former electrode by the operator.
[0063] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A bipolar ablation tip, comprising: The application relates to a pipeline assembly for a medical electrode, which comprises a first electrode net, a second electrode net, a first driving mechanism and a second driving mechanism; wherein the first electrode net and the second electrode net are arranged on a pipeline assembly, the pipeline assembly is connected with the first driving mechanism and the second driving mechanism; the first driving mechanism is provided with a knob, the knob is pushed and pulled to realize the contraction and expansion of the first electrode net; the second driving mechanism is provided with a rotating assembly, the rotating assembly is rotated to realize the contraction and expansion of the second electrode net.
2. The bipolar ablation tip of claim 1, wherein, The pipeline assembly is further provided with a handle, the tail end of the pipeline assembly is connected with the handle, and the first driving mechanism and the second driving mechanism are arranged on the handle.
3. The bipolar ablation tip of claim 2, wherein, The pipeline assembly comprises 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 end of the inner sleeve is fixed in the handle; the front end of the central shaft is fixedly connected with the front end of the first electrode net, and the tail end of the central shaft is fixedly connected with the knob; the fixed outer sleeve assembly is fixedly sleeved outside the inner sleeve, and the front end of the second electrode net and the tail end of the first electrode net are fixed; the movable outer sleeve is movably sleeved outside the inner sleeve, the head of the movable outer sleeve is fixedly connected with the tail end of the second electrode net, and the tail end of the movable outer sleeve is connected with the rotating assembly.
4. The bipolar ablation tip of claim 3, wherein, The fixed outer sleeve assembly is provided with a first fixed outer sleeve and a second fixed outer sleeve, a tube cavity is formed between the outer wall of the first fixed outer sleeve and the inner wall of the inner sleeve; the tail end of the first electrode net is fixed in the tube cavity; the tube wall of the movable outer sleeve is provided with a tube inner wall cavity, and the tail end of the second electrode net is fixed in the tube inner wall cavity.
5. The bipolar ablation tip of claim 3, wherein, The rotating assembly comprises a knob, an inner tooth sleeve, an outer tooth sleeve and a guide rail; the knob is arranged at the front end of the handle, the knob is fixedly connected with the inner tooth sleeve, and the inner tooth sleeve is rotatably arranged in the handle; the movable outer sleeve is fixedly connected with the outer tooth sleeve, the outer tooth sleeve is arranged in the inner tooth sleeve, the inner teeth of the inner tooth sleeve are engaged with the outer teeth of the outer tooth sleeve, and the outer tooth sleeve is slidably arranged on the guide rail and can linearly reciprocate along the guide rail; the tail end of the movable outer sleeve is fixedly connected with the outer tooth sleeve.
6. The bipolar ablation tip of claim 5, wherein, The outer tooth sleeve is provided with a sliding through hole and an extension fixing part, the extension fixing part is provided with a fixing through hole, the center line of the fixing through hole coincides with the axis of the handle; the fixing through hole is used for allowing the movable outer sleeve to pass through and allowing the movable outer sleeve to be fixed; and the guide rail is slidably arranged in the sliding through hole.
7. The bipolar ablation tip of claim 4, wherein, The first electrode net is provided with a head pipe, a tail pipe and a plurality of first electrode wires, the head pipe is fixed at the front end of the central shaft, and the tail pipe is inserted into and fixed in the tube cavity.
8. The bipolar ablation tip of claim 7, wherein, A soft rubber guide head is sleeved on the head pipe of the first electrode net.
9. The bipolar ablation tip of claim 4, wherein, The second electrode net is provided with four second electrode wires, the first end of each second electrode wire is provided with an insertion section, and the second end of each second electrode wire is provided with a circular ring; the insertion section is inserted into and fixed in the tube inner wall cavity, and the circular ring is sleeved on the inner sleeve and fixed by the fixed outer sleeve assembly.
10. The bipolar ablation tip of claim 9, wherein, The second electrode net is provided with two circular rings, and two second electrode wires are connected to the same circular ring. The second electrode net is provided with two circular rings, and two second electrode wires are connected to the same circular ring.