Electrode structures and ablation devices

Abstract

Embodiments of the present disclosure provide an electrode structure and an ablation device, the electrode structure comprising: a plurality of electrode portions, each electrode portion comprising opposite first and second end portions, the first end portions of each electrode portion being connected to each other, the second end portions of each electrode portion being connected to each other, each electrode portion comprising a plurality of first electrode filaments and a plurality of second electrode filaments, each first electrode filament being alternately overlapped with at least one second electrode filament, each second electrode filament being alternately overlapped with at least one first electrode filament, an overlapping portion being formed at the position where the first electrode filament and the second electrode filament are overlapped, each electrode portion being designed in a manner that the weaving of the first electrode filaments and the second electrode filaments increases the contact area of the electrode structure and the ablated object and the smoothness of the electrode structure, and can balance the density requirement of the ablation energy of the electrode filaments and the requirement of the flexibility of the electrode structure.

Description

Technical Field

[0001] Embodiments of this disclosure relate to an electrode structure and an ablation device. Background Technology

[0002] Ablation methods within natural cavities primarily include radiofrequency ablation, cryoablation, and pulsed electric field (PEF) ablation. Natural cavities include the nasal cavity, esophagus, trachea, digestive tract, ear canal, and oral cavity. Radiofrequency ablation, with its point-by-point approach, is time-consuming and requires a high level of catheter manipulation skill from the operator. Patients may experience discomfort during the procedure, and when ablating the target tissue, it can easily affect non-target tissues. For example, radiofrequency ablation of the bronchus may lead to esophageal or nerve damage. Furthermore, radiofrequency ablation can cause tissue scarring. Cryoablation may cause phrenic nerve injury, and freezing of the epicardium near the coronary arteries may lead to thrombosis and progressive coronary artery stenosis.

[0003] Pulsed electric field ablation involves applying high-voltage electrical pulses to the phospholipid bilayer of the cell membrane for a short period, causing the formation of a transmembrane potential. This results in an unstable potential, leading to irreversible penetrating damage to the cell membrane, creating nanoscale pores, and consequently altering cell membrane permeability. This disrupts intracellular homeostasis and ultimately induces apoptosis. Within its ablation zone, pulsed electric field ablation can maintain the integrity of the tissue matrix, preventing damage to adjacent tissues such as the esophagus, coronary arteries, and phrenic nerve. Furthermore, the ablation threshold of pulsed electric field ablation is tissue-specific, allowing for the specific ablation of certain tissues, such as myocardium. This is because the ablation threshold of myocardial tissue is lower than that of many other tissues, allowing for the ablation of myocardial cells while avoiding damage to adjacent tissues such as the esophagus or phrenic nerve.

[0004] The ablation device used in pulsed electric field ablation technology typically has an elongated catheter body and a basket-shaped electrode assembly mounted at one end of the catheter body. The basket-shaped electrode assembly has a proximal end and a distal end, and includes multiple basket side branches connected to its proximal and distal ends. Each basket side branch includes at least one electrode. The catheter body may also include a distal position sensor mounted at or near the distal end of the basket-shaped electrode assembly, and a proximal position sensor mounted at or near the proximal end of the basket-shaped electrode assembly. Summary of the Invention

[0005] The embodiments of this disclosure relate to an electrode structure and an ablation device. Each electrode section is designed with a first electrode wire and a second electrode wire woven together, which can increase the contact area between the electrode structure and the object to be ablated, and also increase the smoothness of the entire electrode structure, thereby balancing the density requirements of the ablation energy and the requirements of the flexibility of the electrode structure.

[0006] At least one embodiment of this disclosure provides an electrode structure comprising: a plurality of electrode portions, each electrode portion including opposing first ends and second ends, wherein the first ends of each electrode portion are interconnected, and the second ends of each electrode portion are interconnected; each electrode portion includes a plurality of first electrode wires spaced apart and arranged sequentially, and a plurality of second electrode wires spaced apart and arranged sequentially, wherein each first electrode wire alternately overlaps with at least one second electrode wire, and each second electrode wire alternately overlaps with at least one first electrode wire, so as to form an overlapping portion at the overlapping position of the first electrode wire and the second electrode wire.

[0007] For example, in the electrode structure provided in at least one embodiment of this disclosure, each of the electrode portions includes a first electrode wire and a second electrode wire forming a basket electrode.

[0008] For example, in the electrode structure provided in at least one embodiment of this disclosure, at least a portion of the basket electrodes are spirally arranged.

[0009] For example, in the electrode structure provided in at least one embodiment of this disclosure, each of the electrode portions is configured to include a protruding portion that protrudes toward the side away from the center of the straight line connecting the first end and the second end when in the open state, and each spirally arranged basket electrode is configured to include a plurality of the protruding portions when in the open state.

[0010] For example, in the electrode structure provided in at least one embodiment of this disclosure, the main body portions of the plurality of basket electrodes are arranged alternately or in parallel.

[0011] For example, the electrode structure provided in at least one embodiment of this disclosure further includes a support structure disposed on the inner sidewall of the basket electrode and at a position corresponding to the pre-formed protrusion, wherein the support structure is elongated and the extending direction of the support structure is parallel to the straight line formed by connecting the first end and the second end.

[0012] For example, in the electrode structure provided in at least one embodiment of this disclosure, there are multiple support structures, and the multiple support structures are arranged sequentially at intervals on the side away from the center of the straight line connecting the first end and the second end of the corresponding pre-formed protrusion portion of the basket electrode.

[0013] For example, in the electrode structure provided in at least one embodiment of this disclosure, each of the support structures includes at least two support substructures, and the at least two support substructures included in each support structure are arranged at intervals along the extension direction of the support structure.

[0014] For example, in the electrode structure provided in at least one embodiment of this disclosure, the plurality of support structures are spaced apart from each other, and the extension lines of the plurality of support structures are intersecting and parallel to each other.

[0015] For example, in the electrode structure provided in at least one embodiment of this disclosure, each electrode portion includes a first electrode wire and a second electrode wire forming a braided strip, the braided strip including a hollow portion surrounded by adjacent overlapping portions.

[0016] For example, in the electrode structure provided in at least one embodiment of this disclosure, the main body portions of the plurality of braided strips are arranged in an arc shape, and the corresponding ends of each braided strip are connected respectively, so that the space enclosed by the plurality of braided strips is olive-shaped.

[0017] For example, in the electrode structure provided in at least one embodiment of this disclosure, the number of braided strips is greater than or equal to 6, and the thickness of each braided strip is 0.1 mm to 2 mm.

[0018] For example, in the electrode structure provided in at least one embodiment of this disclosure, the plurality of braided strips include a plurality of first braided strips having a first hardness and a plurality of second braided strips having a second hardness, wherein the first hardness is less than the second hardness, and the number of the first braided strips is less than the number of the second braided strips.

[0019] For example, in the electrode structure provided in at least one embodiment of this disclosure, a plurality of first braided strips are arranged adjacent to each other in sequence, and a plurality of second braided strips are arranged adjacent to each other in sequence.

[0020] For example, in the electrode structure provided in at least one embodiment of this disclosure, at least one of the first electrode wire and the second electrode wire includes at least one break portion located between two adjacent overlapping portions along its extension direction, and the first electrode wire and the second electrode wire are connected to each other at the positions of the two overlapping portions corresponding to the break portion to form a connection portion.

[0021] For example, in the electrode structure provided in at least one embodiment of this disclosure, the first electrode wire includes at least one cut-off portion located between two adjacent connection portions in the extension direction of the first electrode wire as a first cut-off portion, and at least one first electrode wire is disposed between two adjacent first cut-off portions along the arrangement direction of the first electrode wire.

[0022] For example, in the electrode structure provided in at least one embodiment of this disclosure, the first electrode wire includes at least one cut-off portion located between two adjacent connection portions in the extension direction of the first electrode wire as a first cut-off portion; along the extension direction of the first electrode wire, the portion of the first electrode wire located between two adjacent first cut-off portions is a first electrode wire sub-portion, and the first electrode wire sub-portion overlaps with at least two second electrode wires.

[0023] For example, in the electrode structure provided in at least one embodiment of this disclosure, the second electrode wire includes at least one cut-off portion located between two adjacent connection portions in the extension direction of the second electrode wire as a second cut-off portion, and at least one second electrode wire is provided between two adjacent second cut-off portions along the arrangement direction of the second electrode wire.

[0024] For example, in the electrode structure provided in at least one embodiment of this disclosure, the first cut-off portion and the second cut-off portion have an intersection portion. Along the extension direction of the first electrode wire, at least one first electrode wire is disposed between two adjacent first cut-off portions. At least one second electrode wire with the second cut-off portion is disposed between the second electrode wires where the connecting portions are located on both sides of each first cut-off portion. Along the extension direction of the second electrode wire, at least one first electrode wire with the first cut-off portion is disposed between the first electrode wires where the connecting portions are located on both sides of each second cut-off portion.

[0025] For example, in the electrode structure provided in at least one embodiment of this disclosure, four overlapping portions formed by two first electrode wires adjacent to the first electrode wire with the first cut-off portion in the arrangement direction of the first electrode wire and two second electrode wires adjacent to the second electrode wire with the second cut-off portion in the arrangement direction of the second electrode wire are sequentially connected to form a first quadrilateral; the minimum area of ​​the quadrilateral formed by sequentially connecting the overlapping portions formed by two adjacent first electrode wires and two adjacent second electrode wires is 1 / 5 to 1 / 2 of the area of ​​the first quadrilateral.

[0026] At least one embodiment of this disclosure also provides an ablation device, including an electrode structure, a pull rod, a conduit, and a control handle as described in any of the preceding claims, wherein the electrode structure includes a first end and a second end opposite to each other in the extension direction of the pull rod; a portion of the pull rod is sleeved in the conduit, a portion of the pull rod extending beyond the conduit passes through the electrode structure, and the first end of the electrode structure is connected to the end of the pull rod remote from the conduit, and the second end of the electrode structure is connected to the end of the conduit near the electrode structure; the control handle is connected to the end of the pull rod remote from the electrode structure and configured to control the movement of the pull rod relative to the conduit along its axial direction to control the degree of opening of the electrode structure.

[0027] For example, in the ablation device provided in at least one embodiment of this disclosure, a spiral groove is provided on the outer wall of the portion of the pull rod that is connected to the electrode structure. In the extending direction of the pull rod, the distance between the end of the spiral groove near the electrode structure and the end of the electrode structure near the spiral groove is 1 mm to 20 mm, and the length of the spiral groove is 20 mm to 100 mm.

[0028] For example, in the ablation device provided in at least one embodiment of this disclosure, the lever includes a first sub-lever and a second sub-lever that are detachably connected, and along the extension direction of the lever, the first sub-lever is closer to the electrode structure than the second sub-lever.

[0029] For example, in at least one embodiment of the ablation device provided in this disclosure, the first sub-rod is threadedly connected to the second sub-rod.

[0030] For example, in the ablation device provided in at least one embodiment of this disclosure, along the direction of the electrode structure pointing to the control handle, the conduit includes a first sub-conduit, a second sub-conduit, and a third sub-conduit connected in sequence, wherein the hardness of the first sub-conduit is less than the hardness of the second sub-conduit, and the hardness of the second sub-conduit is less than the hardness of the third sub-conduit.

[0031] For example, in the ablation device provided in at least one embodiment of this disclosure, the first sub-catheter has a dimension of 20 mm to 100 mm in the extension direction of the pull rod, and at least one of the first and second sub-catheters is made of polyether block polyamide, and the third sub-catheter is made of at least one of polyether block polyamide and polydodecanoic acid.

[0032] For example, in the ablation device provided in at least one embodiment of this disclosure, the pull rod includes a pre-bent section, the pre-bent section is adjacent to the end of the pull rod connected to the electrode structure, and the dimension of the pre-bent section in the extension direction of the pull rod is 2mm to 60mm, and the included angle between the pre-bent section and the extension direction of the pull rod is 0° to 30°. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0034] Figure 1 This is a schematic diagram of an ablation device with its basket electrode in a closed state.

[0035] Figure 2 for Figure 1 A schematic diagram showing the basket electrodes in an open state;

[0036] Figure 3 for Figure 1 A schematic diagram showing the basket electrode in an open state and in contact with the object to be ablated;

[0037] Figure 4A A three-dimensional structural diagram of an electrode structure in an open state, provided for at least one embodiment of the present disclosure;

[0038] Figure 4B A three-dimensional structural schematic diagram of another electrode structure provided in at least one embodiment of the present disclosure when it is in an open state;

[0039] Figure 4C A three-dimensional structural schematic diagram of another electrode structure provided in at least one embodiment of the present disclosure when it is in an open state;

[0040] Figure 5A This is a schematic diagram of a planar structure of an electrode portion in which the first electrode wire and the second electrode wire overlap, provided in at least one embodiment of the present disclosure;

[0041] Figure 5B A side view of an electrode structure in an open state, provided for at least one embodiment of this disclosure;

[0042] Figure 6 A schematic planar structure of a portion of an electrode portion provided in at least one embodiment of the present disclosure;

[0043] Figure 7 A schematic diagram of the planar structure of a basket electrode in the open state corresponding to the protruding portion, provided for at least one embodiment of the present disclosure;

[0044] Figure 8 A schematic diagram of the planar structure of a basket electrode in the open state corresponding to the protruding portion, provided for at least one embodiment of the present disclosure;

[0045] Figure 9 A schematic diagram of the planar structure of a basket electrode in the open state corresponding to the protruding portion, provided for at least one embodiment of the present disclosure;

[0046] Figure 10 A schematic planar structure diagram of a partial structure of a basket electrode provided in at least one embodiment of the present disclosure;

[0047] Figure 11 A schematic planar structural diagram of a partial structure of another basket electrode provided in at least one embodiment of the present disclosure;

[0048] Figure 12 A schematic diagram of the structure of an ablation device provided for at least one embodiment of this disclosure;

[0049] Figure 13 for Figure 12 A schematic diagram of the electrode structure and pull rod of the ablation device in the process;

[0050] Figure 14 for Figure 12 A schematic diagram of the tie rod structure of the ablation device in the middle;

[0051] Figure 15 A schematic diagram of the electrode structure and pull rod in an ablation device provided for at least one embodiment of this disclosure;

[0052] Figure 16 for Figure 15 A schematic diagram of the tie rod structure of the ablation device in the middle;

[0053] Figure 17 A schematic diagram of another ablation device provided for at least one embodiment of this disclosure; and

[0054] Figure 18 This is a schematic diagram of the structure of another ablation device provided for at least one embodiment of the present disclosure. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0056] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0057] Unless otherwise defined, the characteristics such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include strictly defined cases of "parallel," "perpendicular," and "identical," as well as cases that include a certain margin of error, such as "approximately parallel," "approximately perpendicular," and "approximately identical." For example, the aforementioned "approximately" may indicate that the difference between the compared objects is within 10% or 5% of the average value of the compared objects. Unless otherwise specified in the following embodiments of this disclosure, the quantity of a component or element is implied to mean that the component or element may be one or more, or can be understood as at least one. "At least one" refers to one or more, and "more" refers to at least two.

[0058] For example, Figure 1 This is a schematic diagram of an ablation device with the basket electrode in the closed state. Figure 2 for Figure 1 A schematic diagram showing the basket electrodes in an open state, combined with... Figure 1 and Figure 2The first end 101a of the basket electrode 101 in the extension direction of the pull rod 102 is connected to the pull rod 102, and the second end 101b of the basket electrode 101 in the extension direction of the pull rod 102 is connected to the conduit 103. The first end 101a and the second end 101b are arranged opposite to each other, that is, a part of the pull rod 102 is sleeved in the basket electrode 101, and the other part is sleeved in the conduit 103. The entire basket electrode 101 is arranged as an electrode structure at the end of the pull rod 102. Button 105 controls the relative movement of conduit 103 and pull rod 102 along the axial direction of pull rod 102 to open and close the basket electrode 101. Button 105 is located on handle 104. The ends of conduit 103 and pull rod 102 away from basket electrode 101 are connected to handle 104. The end of handle 104 away from basket electrode 101 is connected to power cord 106. Power is applied to handle 104 through power cord 106 so that button 105 can drive conduit 103 and pull rod 102 to move relative to each other along the axial direction of pull rod 102 to open and close the basket electrode 101. When the distance between the first end 101a and the second end 101b of the basket electrode 101 is at its maximum, the basket electrode 101 is in a closed state. As the distance between the first end 101a and the second end 101b of the basket electrode 101 gradually decreases, the basket electrode 101 is gradually opened. During this opening process, the maximum radial dimension of the basket electrode 101 also gradually increases, making the basket electrode 101 increasingly sharp, i.e., its flexibility decreases. The sharp portion of the basket electrode 101 not only easily damages the object to be ablated but also makes it difficult to reach more tortuous natural cavities. Furthermore, as the basket electrode 101 is gradually opened, the contact area between the basket electrode 101 and the object to be ablated gradually decreases, thereby reducing the efficiency of ablation.

[0059] For example, Figure 3 for Figure 1 A schematic diagram showing the basket electrode in an open state and in contact with the object to be ablated, as shown below. Figure 3 As shown, the basket electrode 101 is opened to its maximum radial dimension, minimizing the contact area between the basket electrode 101 and the object to be ablated 107 (e.g., a cavity). For example, in Figure 3 In this process, the basket electrode 101 is in point contact with the upper surface of the object to be ablated 107, and the basket electrode 101 is also in point contact with the lower surface of the object to be ablated 107. That is, the contact area between the basket electrode 101 and the object to be ablated 107 is only two points, which greatly reduces the contact area between the basket electrode 101 and the object to be ablated 107.

[0060] The inventors of this disclosure note that, in Figures 1-3In the ablation device shown, the high weaving density of the electrode wires in the basket electrode results in insufficient overall flexibility, making it difficult to bend when entering bending areas, thus limiting the flexible use of the ablation device. To address these issues, increasing the electrode wire density in the basket electrode is necessary to improve ablation effectiveness; furthermore, improving the flexibility of the basket electrode is required to allow it to reach more bending areas. However, increasing the electrode wire density increases the overall rigidity of the basket electrode while decreasing its flexibility. Therefore, there is an urgent need to design an electrode structure that increases the contact area between the electrode and the object to be ablated, while also enhancing the flexibility and bendability of the electrode structure.

[0061] The inventors of this disclosure have also noted that the overall structure of the basket electrode can be modified, for example, by making the electrode structure include multiple electrode portions, each electrode portion including opposing first and second ends, the first ends of each electrode portion being interconnected, the second ends of each electrode portion being interconnected, and each electrode portion being a sheet-like structure formed by a small basket electrode or a part of a basket electrode. On the one hand, an electrode structure including multiple electrode portions with spaced-apart main parts can improve the overall flexibility of the electrode structure, making it easier for the electrode structure to enter bending areas, and multiple electrode portions can also increase the contact area between the electrode structure and the object to be ablated; on the other hand, the area of ​​the object to be ablated covered by a single or a small number of electrode wires is limited, and making each electrode portion a sheet-like structure formed by a small basket electrode or a part of a basket electrode, that is, using a densely woven structure to replace a single or a small number of electrode wires, can further increase the contact area between the electrode structure and the object to be ablated.

[0062] At least one embodiment of this disclosure provides an electrode structure comprising: a plurality of electrode portions, each electrode portion including opposing first ends and second ends, wherein the first ends of each electrode portion are interconnected, and the second ends of each electrode portion are interconnected; each electrode portion includes a plurality of first electrode wires spaced apart and arranged sequentially, and a plurality of second electrode wires spaced apart and arranged sequentially, wherein each first electrode wire alternately overlaps with at least one second electrode wire, and each second electrode wire alternately overlaps with at least one first electrode wire, to form an overlapping portion at the overlapping position of the first electrode wire and the second electrode wire. The electrode structure including a plurality of electrode portions can increase the contact area between the electrode structure and the ablated object, and can also increase the smoothness of the entire electrode structure. Each electrode portion includes a plurality of first electrode wires spaced apart and arranged sequentially, and a plurality of second electrode wires spaced apart and arranged sequentially, wherein each first electrode wire alternately overlaps with at least one second electrode wire, and each second electrode wire alternately overlaps with at least one first electrode wire to form a braided structure, which can balance the density requirements of the electrode wires in the electrode structure and the overall flexibility requirements of the electrode structure.

[0063] For example, Figure 4A This is a three-dimensional structural diagram of an electrode structure in an open state, provided by at least one embodiment of the present disclosure. Figure 4B This is a three-dimensional structural diagram of another electrode structure provided in at least one embodiment of the present disclosure when it is in an open state, for example, as shown below. Figure 4A and Figure 4B As shown, the electrode structure 200 includes a plurality of electrode portions 201, each electrode portion 201 including opposing first end 201a and second end 201b. The first ends 201a of each electrode portion 201 are connected to each other, and the second ends 201b of each electrode portion 201 are connected to each other, that is, the first ends 201a of each electrode portion 201 are connected at position A, and the second ends 201b of each electrode portion 201 are connected at position B. When the electrode structure 200 is in the open state, each electrode portion 201 includes a protruding portion 201c that protrudes away from the center O of the straight line AB formed by the connection of the first end 201a and the second end 201b, and at least some of the electrode portions 201 are spirally arranged so that the overall structure of the electrode structure 200 is "twisted". This arrangement can improve the overall flexibility of the electrode structure 200 and improve the ablation efficiency when the electrode structure 200 is used for ablation treatment.

[0064] For example, each electrode portion 201 is elongated in both the open and closed states. It should be noted that the elongated shape can be a sheet with a certain width; for example, the length of the elongated structure is at least four times its width. The elongated shape can also be a three-dimensional structure with a certain thickness, and it can be a curved extension; the embodiments of this disclosure do not limit this.

[0065] For example, such as Figure 4AAs shown, the main bodies of the four electrode sections 201 are arranged opposite each other in a clockwise direction from the inside out of the paper. The four electrode sections 201 are labeled C, D, E, and F respectively. Electrode sections 201 labeled C and E are arranged opposite each other and each has a protruding portion 201c. The protruding portion 201c of electrode section C protrudes upward, and the protruding portion 201c of electrode section E protrudes downward, thereby achieving contact with both the upper and lower surfaces of the object to be ablated. Electrode sections 201 labeled D and F are arranged opposite each other and inclined relative to the straight line AB. Each electrode section 201 labeled D and F includes two protruding portions 201c. The two protruding portions 201c of each electrode section 201 (D and F) are smoothly connected to form an S-shape. One protrusion 201c of electrode portion 201 marked D protrudes obliquely upward to the left, and the other protrusion 201c protrudes obliquely downward to the right. Correspondingly, one protrusion 201c of electrode portion 201 marked F protrudes obliquely downward to the left, and the other protrusion 201c protrudes obliquely upward to the right. This allows for sufficient contact between the electrode structure and the side surface of the object to be ablated, and ensures that the contact area between the electrode structure and the object to be ablated is evenly distributed.

[0066] It should be noted that, Figure 4A The example described uses a spiral staggered arrangement of the four electrode sections 201 in the main body, but the number and arrangement of the electrode sections 201 in the electrode structure 200 are not limited to this. Figure 4A In other cases, the main bodies of six electrode sections 201 can be arranged opposite each other in pairs, eight electrode sections 201 can be arranged opposite each other in pairs, ten electrode sections 201 can be arranged opposite each other in pairs, or more electrode sections 201 can be arranged opposite each other in pairs, and the number of protrusions 201c on the opposite electrode sections 201 is the same, and the protrusion directions of the protrusions 201c are opposite. The embodiments of this disclosure are not limited in this respect, as long as the density requirements of the electrode wires in the balanced electrode structure and the overall flexibility requirements of the electrode structure can be achieved.

[0067] For example, such as Figure 4B As shown, the main bodies of the four electrode sections 201 are arranged sequentially and spirally, and each spirally arranged electrode section 201 includes multiple protrusions 201c. Figure 4BTaking the electrode structure in the open state as an example, where the main body of each electrode section 201 is inclined relative to the straight line AB, and each electrode section 201 includes two protruding portions 201c, the two protruding portions 201c of each electrode section 201 are smoothly connected to form an S-shape. In the same electrode section 201, the protrusion amplitude of the protruding portion 201c located in the middle of the electrode section 201 is greater than the protrusion amplitude of the protruding portion 201c located near the first end 201a or the second end 201b, and the main bodies of the four electrode sections 201 are arranged sequentially around the straight line AB. This not only increases the contact area with the object to be ablated along the direction of the straight line AB, but also increases the contact area with the object to be ablated around the straight line AB.

[0068] It should be noted that, Figure 4B The example described uses a configuration where the main bodies of four electrode sections 201 are arranged in a spiral arrangement, and each spirally arranged electrode section 201 includes two protrusions 201c. However, the number and arrangement of electrode sections 201 in this electrode structure are not limited to this configuration. Figure 4B In some cases, the main bodies of six electrode sections 201 may be inclined relative to the straight line AB and arranged in a spiral arrangement; the main bodies of eight electrode sections 201 may be inclined relative to the straight line AB and arranged in a spiral arrangement; the main bodies of ten electrode sections 201 may be inclined relative to the straight line AB and arranged in a spiral arrangement; or more electrode sections 201 may be inclined relative to the straight line AB and arranged in a spiral arrangement. Each electrode section 201 may have multiple protrusions 201c of equal number. The embodiments disclosed herein do not limit this, as long as the density requirements of the electrode wires in the balanced electrode structure and the overall flexibility requirements of the electrode structure can be achieved.

[0069] For example, Figure 4C This is a three-dimensional structural diagram of another electrode structure provided in at least one embodiment of the present disclosure when it is in an open state, as shown below. Figure 4C As shown, multiple electrode sections 201 are arranged sequentially, and the overall cross-sectional shape of the electrode structure 201 is circular or elliptical. When the electrode structure is in the open state, each electrode section 201 includes a protruding portion 201c at the middle position of the electrode section 201, that is, each electrode section 201 is arranged in an arc shape. The main bodies of the multiple electrode sections 201 are arranged sequentially around the straight line AB, thereby increasing the contact area between the electrode structure and the object to be ablated in the circumferential direction perpendicular to the straight line AB. Figure 4CTaking the arrangement of the main body of the four electrode sections 201 in sequence as an example, the main body of the four electrode sections 201 are arranged opposite each other in pairs so that the four electrode sections 201 are in contact with the upper surface, lower surface, inner surface and outer surface of the object to be ablated, thereby achieving a uniform increase in the contact area between the electrode structure and the object to be ablated in the circumferential direction perpendicular to the straight line AB.

[0070] It should be noted that, Figure 4C The example described uses four electrode sections 201 arranged sequentially, with each electrode section 201 arranged in an arc shape. However, the number and arrangement of the electrode sections 201 in this electrode structure 200 are not limited to this. Figure 4C In some cases, the main bodies of six electrode portions 201 may be arranged in sequence with each electrode portion 201 arranged in an arc shape; the main bodies of eight electrode portions 201 may be arranged in sequence with each electrode portion 201 arranged in an arc shape; the main bodies of ten electrode portions 201 may be arranged in sequence with each electrode portion 201 arranged in an arc shape; or more electrode portions 201 may be arranged in sequence with each electrode portion 201 arranged in an arc shape. The protrusion direction of the protrusion portion 201c is away from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b of the electrode portion 201. The embodiments disclosed herein do not limit this, as long as the density requirements of the electrode wires in the balanced electrode structure and the overall flexibility requirements of the electrode structure can be achieved.

[0071] It should be noted that, Figures 4A to 4C The electrode portion 201 shown can be pre-shaped, for example, by using a mold with a shape corresponding to the bending state and heat-setting it, so that when the electrode structure is in the open state, the portion of the electrode portion 201 corresponding to the protrusion 201c can easily undergo the above-mentioned deformation when it needs to be bent. This avoids the problems of adjusting the bending degree of the electrode portion 201 by applying various external forces to the electrode portion 201 and the complicated operation, as well as the problems of the electrode portion 201 being difficult to reach the predetermined state, difficult to stably and accurately form the predetermined state, and thus causing the ablation operation to fail.

[0072] For example, Figure 5A This is a schematic diagram of a planar structure showing the overlapping of a first electrode wire and a second electrode wire in an electrode section, provided in at least one embodiment of this disclosure. Figure 4A , Figure 4B , Figure 4C and Figure 5AEach electrode section 201 includes multiple first electrode wires 2011 spaced apart and arranged sequentially, and multiple second electrode wires 2012 spaced apart and arranged sequentially. Each first electrode wire 2011 alternately overlaps with at least one second electrode wire 2012, and each second electrode wire 2012 alternately overlaps with at least one first electrode wire 2011, so as to form an overlapping portion 2013 at the overlapping position of the first electrode wires 2011 and the second electrode wires 2012. Figure 5A In the structure shown, an electrode structure 200 is formed by weaving multiple first electrode wires 2011 and multiple second electrode wires 2012. The electrode structure 200 has a high density of electrode wires. Weaving the electrode wires instead of rigidly connecting them can increase the overall smoothness of the electrode structure 200 and the overall contact area between the electrode structure and the object to be ablated, so as to balance the requirements of the electrode wire density and the overall flexibility of the electrode structure.

[0073] For example, such as Figure 5A As shown, each electrode section 201 includes a first electrode wire 2011 and a second electrode wire 2012 woven together to form a braided tape 2016, that is, the braided tape 2016 is used as... Figure 4A , Figure 4B and Figure 4C Electrode section 201.

[0074] For example, combining Figure 4A , Figure 4B , Figure 4C and Figure 5A In one example, when the electrode structure is in the open state, a portion of the plurality of braided strips 2016 each includes a protrusion 201c, and another portion each includes two protrusions 201c, forming a plurality of braided strips 2016 corresponding to the above. Figure 4A In another example, when the electrode structure is in the open state, each of the plurality of braided strips 2016 may include two protrusions 201c, the two protrusions 201c being smoothly connected to form an S-shape, and the plurality of braided strips 2016 forming a shape corresponding to the above. Figure 4B The electrode structure in the example; in another example, when the electrode structure is in the open state, each of the plurality of braided strips 2016 includes a protrusion 201c that protrudes at the middle position of the braided strip 2016, that is, each braided strip 2016 is arranged in an arc shape, and the plurality of braided strips 2016 form a structure corresponding to the above. Figure 4C The electrode structure within. For example. Figure 5AThe braided strip 2016 shown includes a hollowed-out portion 2017 surrounded by adjacent overlapping portions 2013. The overall size of the electrode portion can be adjusted by adjusting the size of the hollowed-out portion 2017. For example, the length and width of the electrode portion 201 can be adjusted. Furthermore, the overall flexibility of the electrode structure 200 can be improved by increasing the contact area between the electrode structure 200 and the object to be ablated.

[0075] For example, combining Figure 4C and Figure 5A When the electrode structure is in the open state, the main body parts of multiple braided strips 2016 are arranged opposite each other, and the corresponding ends of each braided strip 2016 are connected respectively, so that the shape of the space enclosed by multiple braided strips 2016 is olive-shaped, thereby enabling simultaneous ablation treatment of the upper surface, lower surface, inner surface and outer surface of the object to be ablated.

[0076] For example, in another example, an electrode structure 200 includes a number of braided strips 2016 greater than or equal to 6, and the thickness of each braided strip 2016 is 0.1 mm to 2 mm, for example, the thickness of each braided strip 2016 is 0.1 mm, 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, 1.8 mm, or 2 mm. That is, the electrode portion 201 is composed of a varying number of braided strips 2016, and the number of braided strips 2016 is at least 6. For example, the number of braided strips 2016 can be 6, 7, 8, 9, 10, or 12, etc. For example, it can also be 24 or 48. For example, the thickness of the multiple braided strips 2016 can be the same or different, or partially the same and partially different. Of course, the embodiments of this disclosure do not limit the number, thickness, and shape of the braided strips 2016. The corresponding ends of the multiple braided strips 2016 are connected by welding. The materials of the first electrode wire 2011 and the second electrode wire 2012 included in the braided tape 2016 can be nickel-titanium alloy, medical stainless steel, etc. For example, the first electrode wire 2011 and the second electrode wire 2012 included in the braided tape 2016 can be laser-cut or cut into electrode wires from nickel-titanium alloy tubing or sheet, and then the electrode wires are subjected to heat treatment, borax, pickling, and polishing processes. Then the first electrode wire 2011 and the second electrode wire 2012 are braided. The embodiments of this disclosure do not limit this, as long as the formed first electrode wire 2011 and the second electrode wire 2012 can conduct electricity.

[0077] For example, Figure 5B A side view of an electrode structure in the open state, provided in at least one embodiment of this disclosure, as shown below. Figure 5BAs shown, in another example, the plurality of braided strips 2016 include a plurality of first braided strips 2016a having a first hardness and a plurality of second braided strips 2016b having a second hardness. The first hardness is less than the second hardness, and the number of first braided strips 2016a is less than the number of second braided strips 2016b. That is, the multiple braided strips 2016 have different hardnesses, and the number of the softer first braided strips 2016a is less than the number of the harder second braided strips 2016b. For example, in Figure 5B In the structure shown, there are three first braided strips 2016a and seven second braided strips 2016b. However, the embodiments of this disclosure are not limited to this, and there may be other numbers of first braided strips 2016a and other numbers of second braided strips 2016b. For example, the first braided strips 2016a with softer stiffness may be arranged continuously adjacently, staggered, or randomly. Figure 5B In the structure shown, the softer first braided strips 2016a are arranged in consecutive adjacent rows, and the harder second braided strips 2016b are arranged in consecutive adjacent rows. When the first braided strips 2016a are made of a relatively soft material, pulling the lever can achieve an asymmetry in the opened electrode structure 200, thereby enabling the application of as much ablation energy as possible to the local location.

[0078] For example, in another example, multiple softer first braided strips 2016a are arranged adjacent to each other in sequence, and multiple harder second braided strips 2016b are arranged adjacent to each other in sequence. This makes it easier to adjust the ablation energy at the local ablation site.

[0079] For example, in some examples, the arrangement density of the braided strips 2016 in different regions can be set to be different, or the thickness, width, etc. of the different braided strips 2016 can be set to be different. That is, by adjusting two or more combinations of the hardness, shape, size, and arrangement density of the braided strips 2016, the electrode structure can be an asymmetrical column when it is open, so that the electrode structure 200 can fit with cavities with different inner diameters to be suitable for cavities with a wider range of inner diameters. Of course, the embodiments of this disclosure do not limit this.

[0080] It should be noted that at the position corresponding to the overlapping part 2013, although the first electrode wire 2011 and the second electrode wire 2012 may not be rigidly connected, the overlapping part 2013 corresponds to two layers of electrode wires, and its rigidity is greater than that of other non-overlapping positions.

[0081] It should also be noted that, Figure 5AOnly a planar structural schematic diagram of the electrode portion 201 as a strip structure is shown. In some examples, the electrode portion 201 can be a strip structure woven from the first electrode wire and the second electrode wire, or it can be a basket electrode with a three-dimensional structure woven from the first electrode wire and the second electrode wire. The embodiments disclosed herein are not limited to this.

[0082] For example, Figure 6 A schematic planar structure diagram of a portion of another electrode portion provided in at least one embodiment of this disclosure, as shown below. Figure 6 As shown, each electrode section 201 includes a first electrode wire 2011 and a second electrode wire 2012 forming a basket electrode 2014. Figure 6 Only the portion of the basket electrode structure parallel to the paper and outward is shown. Each basket electrode is in surface contact with the surface of the object to be ablated, thereby increasing the overall contact area between the electrode structure 200 and the object to be ablated.

[0083] For example, in one example, Figure 6 The basket electrode 2014 shown is spirally arranged. This basket electrode 2014 is applied... Figure 4A and Figure 4B When the electrode part 201 is used as the electrode part, and the electrode structure is in the open state, at least a portion of the basket electrode 2014 includes multiple protrusions. When the electrode part 201 included in the electrode structure 200 is the basket electrode 2014, the electrode part 201 can be represented by the basket electrode 2014. Other related content can be found in the relevant descriptions above, and will not be repeated here.

[0084] For example, in one embodiment, the plurality of basket electrodes 2014 are arranged in a spiral configuration, and when the electrode structure is in the open state, a portion of the plurality of basket electrodes 2014 includes one protrusion 201c, and another portion includes two protrusions 201c. The plurality of basket electrodes 2014 form a configuration corresponding to the above. Figure 4A The electrode structure in the example; in another example, when the electrode structure is in the open state, each of the plurality of basket electrodes 2014 may include two protrusions 201c, the two protrusions 201c being smoothly connected to form an S-shape, and the plurality of basket electrodes 2014 forming a shape corresponding to the above. Figure 4B The electrode structure in the example; in another example, when the electrode structure is in the open state, each of the plurality of basket electrodes 2014 includes a protrusion 201c that protrudes from the middle of the basket electrode 2014, that is, the entire basket electrode 2014 is arranged in an arc shape, and the plurality of basket electrodes 2014 form a structure corresponding to the above. Figure 4C Electrode structure in.

[0085] Of course, the shape of each region of the main body of the basket electrode 2014 is not limited to a cylinder with equal radial dimensions, but can also be a quadrangular prism with successively varying radial dimensions. The embodiments disclosed herein do not limit this.

[0086] For example, Figure 7 A schematic diagram of the planar structure of a basket electrode in the open state corresponding to the protruding portion, provided for at least one embodiment of this disclosure, as shown below. Figure 7 As shown, taking the basket electrode 2014 as an example, when the basket electrode is in the open state, a support structure 2015 is provided on the inner sidewall of the basket electrode 2014 at a position corresponding to the protrusion 201c, and there are multiple support structures 2015. For example, Figure 7 Four parallel support structures 2015 are provided, each support structure 2015 being elongated, and the extension direction of each support structure 2015 is parallel to the straight line AB formed by connecting the first end 201a and the second end 201b. Multiple support structures are arranged sequentially at intervals on the side of the protruding portion 201c away from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. No support structure is provided on the side of the protruding portion 201c near the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. For example, in... Figure 7 In the structure shown, the extension length of each support structure 2015 spans the protrusion 201c corresponding to the entire basket electrode 2014, so as to maximize the contact area between each basket electrode 2014 and the object to be ablated.

[0087] It should be noted that, Figure 7 The diagram shown is a plan view, representing a structural schematic of the surface of the protruding portion 201c that protrudes outward from the paper. This surface is the side of the protruding portion 201c that is furthest from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. The support structure 2015 is located at the position of the inner sidewall corresponding to the surface of the protruding portion 201c that protrudes outward from the paper.

[0088] For example, Figure 8 A schematic diagram of the planar structure of another basket electrode provided in at least one embodiment of this disclosure, corresponding to the protruding portion in the open state, is shown below. Figure 8As shown, each support structure 2015 includes at least two support substructures 2015a, and the at least two support substructures 2015a included in each support structure 2015 are arranged at intervals along the extending direction of the support structure 2015. When the basket electrode is in the open state, multiple support structures are arranged at intervals on the side of the protrusion 201c away from the center O of the straight line AB formed by the connection of the first end 201a and the second end 201b, and no support structure is provided on the side of the protrusion 201c near the center O of the straight line AB formed by the connection of the first end 201a and the second end 201b. For example, Figure 8 Taking each support structure 2015 as an example, which includes two support substructures 2015a, the two adjacent support substructures 2015a extend in the same direction and are spaced apart from each other. This arrangement can further improve the flexibility of the electrode structure 200 while ensuring the maximum contact area between each basket electrode 2014 and the object to be ablated, making it easier for the electrode structure 200 including the basket electrode 2014 to pass through the bending channel. Of course, the embodiments of this disclosure are not limited to each support structure 2015 including two support substructures 2015a, but may also include more support substructures 2015a arranged sequentially adjacent to each other, such as 3, 4, 5 or 6, etc.

[0089] It should be noted that, Figure 8 The diagram shown is a plan view, representing a structural schematic of the surface of the protruding portion 201c that protrudes outward from the paper. This surface is the side of the protruding portion 201c that is furthest from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. The support structure 2015 is located at the position of the inner sidewall corresponding to the surface of the protruding portion 201c that protrudes outward from the paper.

[0090] For example, Figure 9 A schematic diagram of the planar structure of another type of basket electrode provided in at least one embodiment of this disclosure, corresponding to the protruding portion in the open state, as shown below. Figure 9 As shown, multiple support structures 2015 are arranged at intervals, and the extension lines of each support structure 2015 intersect and are parallel. For example, Figure 9The following description uses the basket electrode in its open state, with the extensions of the four support structures 2015 intersecting and parallel. The extension length of each support structure 2015 covers half the length of the protruding portion. Adjacent support structures 2015 are spaced apart not only in the direction parallel to the straight line AB formed by connecting the first end 201a and the second end 201b, but also circumferentially spaced apart in the direction perpendicular to the straight line AB. This further increases the flexibility of the entire electrode structure 200 in two directions, making it easier for the electrode structure 200 to enter the bending channel. The extension direction of each support structure 2015 is parallel to the straight line AB formed by connecting the first end 201a and the second end 201b. Multiple support structures are arranged sequentially and spaced apart on the side of the protruding portion 201c away from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. No support structure is provided on the side of the protruding portion 201c near the center O of the straight line AB formed by connecting the first end 201a and the second end 201b.

[0091] It should be noted that, Figure 9 The diagram shown is a plan view, representing a structural schematic of the surface of the protruding portion 201c that protrudes outward from the paper. This surface is the side of the protruding portion 201c that is furthest from the center O of the straight line AB formed by connecting the first end 201a and the second end 201b. The support structure 2015 is located at the position of the inner sidewall corresponding to the surface of the protruding portion 201c that protrudes outward from the paper.

[0092] For example, Figure 10 This is a schematic planar structural diagram of a partial structure of a basket electrode provided in at least one embodiment of the present disclosure, as shown below. Figure 10 As shown, an embodiment of this disclosure provides an electrode structure 201. The electrode structure 201 includes a plurality of first electrode wires 2011 spaced apart and arranged sequentially, and a plurality of second electrode wires 2012 spaced apart and arranged sequentially. Each first electrode wire 2011 alternately overlaps with the plurality of second electrode wires 2012, and each second electrode wire 2012 alternately overlaps with the plurality of first electrode wires 2011, to form a plurality of overlapping portions 2013 at the overlapping positions of the first electrode wires 2011 and the second electrode wires 2012.

[0093] refer to Figure 10At least one of the first electrode wire 2011 and the second electrode wire 2012 includes at least one cut-off portion 2017 located between two adjacent overlapping portions 2013 along its extension direction. The first electrode wire 2011 and the second electrode wire 2012 are connected to each other at the positions of the two overlapping portions 2013 corresponding to the cut-off portion 2017 to form a connection portion 2018.

[0094] For example, the first electrode wire 2011 extends from the upper right corner to the lower left corner. The arrangement direction of multiple first electrode wires 2011 can be represented as direction Y, and the extension direction of the first electrode wires 2011 can be represented as direction X. For example, directions X and Y do not have to be strictly straight lines. For example, directions X and Y can have a certain curvature. For example, the arrangement direction of multiple first electrode wires 10 can also have a certain deviation relative to direction Y. For example, the deviation range can be 0°-30° relative to direction Y, but the embodiments of this disclosure are not limited to this. For example, the extension direction of each first electrode wire 10 does not have to be strictly the same. For example, the extension direction of the first electrode wire 10 can have a certain deviation relative to direction X. For example, the deviation range can be 0°-30° relative to direction X, but the embodiments of this disclosure are not limited to this. For example, the second electrode wire 2012 extends from the upper left corner to the lower right corner. The arrangement direction of multiple second electrode wires 2012 can be represented as direction X, and the extension direction of the second electrode wire 2012 can be represented as direction Y.

[0095] For example, such as Figure 10As shown, multiple first electrode wires 2011 are arranged at intervals in the Y direction, and the multiple first electrode wires 2011 do not intersect each other. Multiple second electrode wires 2012 are arranged at intervals in the X direction, and the multiple second electrode wires 2012 do not intersect each other. Each first electrode wire 2011 and multiple second electrode wires 2012 alternately overlap, that is, a portion of each first electrode wire 2011 in its extension direction presses on at least one second electrode wire 2012, and at least one second electrode wire 2012 adjacent to the at least one second electrode wire 2012 presses on another portion of the first electrode wires 2011, and so on. Each second electrode wire 2012 and multiple first electrode wires 2011 alternately overlap, that is, a portion of each second electrode wire 2012 in its extension direction presses on at least one first electrode wire 2011, and at least one first electrode wire 2011 adjacent to the at least one first electrode wire 2011 presses on another portion of the second electrode wires 2012, and so on. Each first electrode wire 2011 forms an overlapping portion 2013 at the position where it overlaps with each second electrode wire 2012. Therefore, the number of second electrode wires 2012 overlapping with each first electrode wire 2011 is equal to the number of overlapping portions 2013 corresponding to each first electrode wire 2011. For example, both the first electrode wire 2011 and the second electrode wire 2012 comprise a conductive material. For example, the materials of the first electrode wire 2011 and the second electrode wire 2012 can be the same, but the embodiments of this disclosure are not limited thereto. For example, the first electrode wire 2011 or the second electrode wire 2012 can include at least one of nickel-cobalt alloy wire, cobalt-chromium alloy wire, 316L stainless steel wire, and 304 stainless steel wire, but the embodiments of this disclosure are not limited thereto.

[0096] For example, at least one of the first electrode wire 2011 and the second electrode wire 2012 includes at least one cut-off portion 2017 located between two adjacent overlapping portions 2013 along its extension direction. For example, to clearly illustrate this structure, Figure 10 The first electrode wire 2011 is configured to include at least one cut-off portion 2017 located between two adjacent overlapping portions 2013 along its extension direction (i.e., in direction X). This cut-off portion 2017 is shown in dashed lines to indicate a removed but not actually present portion. For example, see reference... Figure 10The cut-off portion 1027 refers to the portion that is broken off and removed from the first electrode wire 2011 or the second electrode wire 2012. For example, the two overlapping portions 2013 corresponding to the severance portion 2017 are located at both ends of the severance portion 1027. The first electrode wire 2011 and the second electrode wire 2012 forming each of the two overlapping portions 2013 are connected to each other at the overlapping position. That is, at the position of the two overlapping portions 2013 corresponding to the severance portion 2017, the first electrode wire 2011 and the second electrode wire 2012 are connected to each other to form a connecting portion 2018. That is, the connecting portion 2018 and the overlapping portions 2013 corresponding to both ends of the severance portion 2017 are in the same position. Therefore, the first electrode wire 2011 after forming the severance portion 2017 can be fixed to reduce the risk of misalignment or detachment of the first electrode wire 2011 and the second electrode wire 2012, thereby ensuring the density of the first electrode wire 2011 in the electrode structure 201 and improving the ablation effectiveness. This design prevents the first electrode wire 2011 and / or the second electrode wire 2012 at both ends of the broken portion 2017 from becoming sharp as the size of the basket electrode increases along its circumference. It also further prevents the risk of scratching the object to be ablated due to the first electrode wire 2011 and / or the second electrode wire 2012 not being properly controlled.

[0097] The embodiments of this disclosure, by providing at least one cut-off portion 2017 in at least one of the first electrode wire 2011 and the second electrode wire 2012, can reduce the weaving density of at least one of the first electrode wire 2011 and the second electrode wire 2012 in the electrode structure 201, and effectively enhance the flexibility of the electrode structure 201, making the electrode structure 201 easy to adjust. At the same time, it can also make the electrode wire density in the electrode structure 201 higher, so as to have a good ablation effect.

[0098] For example, refer to Figure 10 The lengths of the multiple cut-off portions 2017 in each first electrode wire 2011 or each second electrode wire 2012 may be the same in their extension direction, but the embodiments of this disclosure are not limited to this and may also be different. For example, in the electrode structure 201, the lengths of the multiple cut-off portions 2017 may be arranged in a variety of ways according to design requirements to adapt to different application environments and improve ablation efficiency.

[0099] For example, such as Figure 10As shown, the first electrode wire 2011 includes at least one cut-off portion 2017 located between two adjacent connecting portions 2018 in the extending direction of the first electrode wire 2011, which is a first cut-off portion 2017a. Along the arrangement direction of the first electrode wires 2011, at least one first electrode wire 2011 is disposed between two adjacent first cut-off portions 2017a. For example, Figure 10 The electrode structure shown only includes multiple first disconnection portions 2017a, while the second electrode wire 2012 does not have disconnection portions 2017a. However, the embodiments of this disclosure are not limited to this. For example, the second electrode wire 2012 may also have disconnection portions 2017a. Figure 10 As shown, there are multiple first cut-off portions 2017a between two identical second electrode wires 2012. A first electrode wire 2011 is spaced between two adjacent first cut-off portions 2017a along the extension direction of the second electrode wire 2012. This allows the multiple first cut-off portions 2017a to be arranged in a regular manner, and to regularly reduce the rigidity of the basket electrode and increase its flexibility.

[0100] For example, such as Figure 10 As shown, along the extending direction of the first electrode wire 2011, the portion of the first electrode wire 2011 located between two adjacent first cut-off portions 2017a is called the first electrode wire sub-portion 2011a, which overlaps with at least two second electrode wires 2012. For example, as Figure 10 As shown, the first electrode wire portion 2011a overlaps with three second electrode wires 2012. The two ends of the first electrode wire portion 2011a are connected to the two second electrode wires 2012 located at the edge through the connecting portion 2018. The first electrode wire portion 2011a and the second electrode wires 2012 located in the middle overlap to form an overlapping portion, without achieving a rigid connection. This can increase the flexibility between the first electrode wire portion 2011a and the second electrode wires 2012, so that the electrode structure 200 can be adapted to the bent channel.

[0101] For example, Figure 11 A schematic planar structural diagram of a partial structure of another basket electrode provided in at least one embodiment of this disclosure, as shown below. Figure 11As shown, the first electrode wire 2011 includes at least one cut-off portion 2017 located between two adjacent connecting portions 2018 in the extending direction (direction X) of the first electrode wire 2011, which is a first cut-off portion 2017a. The second electrode wire 2012 includes at least one cut-off portion 2017 located between two adjacent connecting portions 2018 in the extending direction (direction Y) of the second electrode wire 2012, which is a second cut-off portion 2017b. Along the arrangement direction of the second electrode wires 2012, at least one second electrode wire 2012 is disposed between two adjacent second cut-off portions 2017b. Along the extending direction of the first electrode wire 2011, i.e., direction X, at least one first electrode wire 2011 is disposed between two adjacent first cut-off portions 2017a. At least one second electrode wire 2012 having a second cut-off portion 2017b is disposed between the second electrode wires 2012 where the connecting portions 2018 are located on both sides of each first cut-off portion 2017a. For example, in Figure 11 In the structure shown, the first cut-off portion 2017a and the second cut-off portion 2017b have an intersection. Along the extension direction of the first electrode wire 2011, i.e., direction X, there are two adjacent second cut-off portions 2017b within the area defined by two identical first electrode wires 2011. Four second electrode wires 2012 are located between the two adjacent second cut-off portions 2017b along the extension direction of the first electrode wires 2011. Along the extension direction of the second electrode wires 2012, i.e., direction Y, at least one first electrode wire 2011 having a first cut-off portion 2017a is provided between the first electrode wires 2011 where the connecting portions 2018 on both sides of each second cut-off portion 2017b are located.

[0102] For example, such as Figure 11 As shown, the electrode structure 201 includes a plurality of first disconnection portions 2017a and a plurality of second disconnection portions 2017b. Each first disconnection portion 2017a and each second disconnection portion 2017b forms an intersecting combination, and the two endpoints of the first disconnection portion 2017a and the two endpoints of the intersecting second disconnection portion 2017b do not overlap. For example, for a set of intersecting first disconnection portions 2017a and second disconnection portions 2017b, the center of the first disconnection portion 2017a may coincide with the center of the second disconnection portion 2017b, but the embodiments of this disclosure are not limited thereto.

[0103] For example, such as Figure 11As shown, in direction X, the minimum distance between two adjacent second electrode wires 2012 is M; in direction Y, the minimum distance between two adjacent first electrode wires 2011 is L. In electrode structure 201, the dimension of each first cut-off portion 2017a in the extension direction of its corresponding first electrode wire 2011 is not less than 2M, and the dimension of each second cut-off portion 2017b in the extension direction of its corresponding second electrode wire 2012 is not less than 2L, but the embodiments of this disclosure are not limited thereto.

[0104] For example, such as Figure 11 As shown, in the electrode structure 201, in the direction X, the number of first electrode wires 2011 between two adjacent first cut-off portions 2017a can be unequal, for example, there can be two, three or four, etc. The embodiments of this disclosure do not limit this.

[0105] For example, such as Figure 11 As shown, within region A1, multiple second electrode wires 2012 with second cut-off portions 2017b can be arranged between the second electrode wires 2012 where the connecting portions 2018 on both sides of each first cut-off portion 2017a are located, and the multiple second electrode wires 2012 have multiple adjacent second cut-off portions 2017b. At this time, the dimension of the connecting portions 2018 on both sides of the first cut-off portion 2017a in the extension direction (i.e., direction Y) of the second electrode wire 2012 where it is located is not less than 3M, but the embodiments of this disclosure are not limited to this.

[0106] For example, such as Figure 11 As shown, within region A2, multiple first electrode wires 2011 with first cut-off portions 2017a can be provided between the first electrode wires 2011 where the connecting portions 2018 on both sides of each second cut-off portion 2017b are located, and the multiple first electrode wires 2011 have multiple adjacent first cut-off portions 2017a. At this time, the dimension of the connecting portions 2018 on both sides of the second cut-off portion 2017b in the extension direction (i.e., direction X) of the first electrode wire 2011 where it is located is not less than 3L, but the embodiments of this disclosure are not limited to this.

[0107] For example, such as Figure 11 As shown, four overlapping portions 2013 formed by the two first electrode wires 2011 adjacent to the first electrode wire 2011 with the first cut-off portion 2017a in the arrangement direction (Y direction) of the first electrode wire 2011 and the two second electrode wires 2012 adjacent to the second electrode wire 2012 with the second cut-off portion 2017b in the arrangement direction of the second electrode wire 2012 are connected in sequence to form a first quadrilateral 301.

[0108] For example, such as Figure 11As shown, the first cut-off portion 2017a and the second cut-off portion 2017b are combined in an intersecting manner. Two adjacent first electrode wires 2011 with the first cut-off portion 2017a in the Y-direction of the first electrode wires 2011 can be first electrode wire 2011a and first electrode wire 2011b, and two adjacent second electrode wires 2012 with the second cut-off portion 2017b in the Y-direction of the second electrode wires 2012 can be second electrode wire 2012a and second electrode wire 2012b. Thus, the first electrode wires 2011a, 2012a, 2011b, and 2012b overlap each other, forming overlapping portions 2013a, 2013b, 2013c, and 2013d. These four overlapping portions 2013 are connected to each other to form a first quadrilateral 301.

[0109] For example, such as Figure 11 As shown, in electrode structure 201, the area of ​​the first quadrilateral 301 is at least 4M*L, but the embodiments of this disclosure are not limited to this. For example, the area of ​​the first quadrilateral 301 in regions A1 and A2 is at least 6M*L. For example, the area of ​​the first quadrilateral 301 can be an even multiple of M*L, such as 8M*L, 10M*L, etc., but the embodiments of this disclosure are not limited to this.

[0110] For example, such as Figure 11 As shown, in the electrode structure 201, the minimum area of ​​the quadrilateral 302 formed by the overlapping portion 2013 formed by the overlapping of two adjacent first electrode wires 2011 and two adjacent second electrode wires 2012 is 1 / 5 to 1 / 2 of the area of ​​the first quadrilateral 301.

[0111] It should be noted that quadrilateral 302 refers to the shape of the hollow area with the smallest area when the first electrode wire 2011 and the second electrode wire 2012 overlap each other and no broken part 2017 is formed in either the first electrode wire 2011 or the second electrode wire 2012.

[0112] For example, the minimum area of ​​quadrilateral 302 is the minimum area unit of the quadrilateral formed by multiple first electrode wires 2011 and multiple second electrode wires 2012. For example, the minimum area of ​​quadrilateral 302 can be M*L. For example, the areas of multiple first quadrilaterals 301 can be unequal. For example, the area of ​​the first quadrilateral 301 can be 2-3 times, 2.5-3.5 times, 4-5 times, etc., of quadrilateral 302, and the embodiments of this disclosure do not limit this.

[0113] It should be noted that the design of the cut-off portion of the basket electrode is not limited to the related even number mentioned above, and can have more configurations as needed. The embodiments disclosed herein do not limit this.

[0114] Figure 12 A schematic diagram of the structure of an ablation device provided for at least one embodiment of this disclosure; Figure 13 for Figure 12 A schematic diagram of the electrode structure and pull rod of the ablation device in the process; Figure 14 for Figure 12 A schematic diagram of the tie rod structure of the ablation device.

[0115] refer to Figure 12 At least one embodiment of this disclosure also provides an ablation device 020, which includes the electrode structure 200 of any of the above embodiments, as well as a pull rod 211, a conduit 212, and a control handle 213. For example, relevant descriptions of the electrode structure can be found in the relevant descriptions of the above embodiments, and will not be repeated here.

[0116] For example, electrode structure 200 includes a first end 2001 and a second end 2002 opposite to each other in the extending direction of pull rod 211. A portion of pull rod 211 is sleeved in conduit 212, and the portion of pull rod 211 extending outside conduit 212 passes through electrode structure 200. The first end 2001 of electrode structure 200 is connected to the end of pull rod 211 away from conduit 212, and the second end 2002 of electrode structure 200 is connected to the end of conduit 212 near electrode structure 200. Control handle 213 is connected to the end of pull rod 211 away from electrode structure 200 and configured to control the movement of pull rod 211 relative to conduit 212 along its axial direction to control the degree to which electrode structure 200 opens.

[0117] For example, refer to Figure 12The portion of the pull rod 211 extending beyond the conduit 212 is located inside the twisted structure formed by the opening of the electrode structure 200 and is parallel to its axis (parallel to the Z direction). The end of the pull rod 211 extending beyond the conduit 212, away from the control handle 213, is fixedly connected to the first end 2001 of the electrode structure 200. The second end 2002 of the electrode structure 200 is fixedly connected to the end of the conduit 212 near the electrode structure 200. That is, the second end 2002 of the electrode structure 200 and the pull rod 211 located inside the conduit 212 can move relative to each other in the extension direction of the pull rod. For example, the control handle 213 may include a control button 2131. When the control button 2131 is pressed, at least the portion of the pull rod 212 located inside the electrode structure 200 can extend or retract in its extension direction (i.e., the Z direction), thereby causing the first end 2001 of the electrode structure 200 to move relative to the second end 2002, thus causing the electrode structure 200 to extend or retract. For example, the greater the degree to which the first end 2001 of the electrode structure 200 stretches relative to the second end 2002, the greater the degree of stretching of the electrode structure 200. This can be adjusted according to design requirements, and the embodiments disclosed herein do not limit this.

[0118] At least one embodiment of the ablation device 020 provided in this disclosure includes an electrode structure 200 with a cut-off portion 2017. In the electrode structure 200, by providing at least one cut-off portion 2017 in at least one of the first electrode wire 2011 and the second electrode wire 2012, the braiding density of the electrode wires in the electrode structure 200 can be reduced, and the flexibility of the electrode structure 200 can be effectively enhanced, making the electrode structure 200 easy to adjust. At the same time, the density of the electrode wires in the electrode structure 200 can be higher, so as to have a good ablation effect.

[0119] For example, refer to Figure 13 and Figure 14 In the ablation device 020, a spiral groove 215 is provided on the outer wall of the part of the pull rod 211 that is connected to the electrode structure 200. The distance K1 between the end 2151 of the spiral groove 215 near the electrode structure 200 and the end of the electrode structure 200 near the spiral groove 215 is 1mm to 20mm, and the length K2 of the spiral groove 215 is 20mm to 100mm.

[0120] For example, refer to Figure 13 and Figure 14 By providing a spiral groove 215 on the outer wall of the part of the pull rod 211 near the electrode structure 200, the weight of the part of the pull rod 211 near the electrode structure 200 can be reduced, which helps to improve the flexibility of this part of the pull rod 211, thereby facilitating the flexible bending of the electrode structure 200 in the natural cavity and making it easier to operate.

[0121] For example, such as Figure 13 and Figure 14 As shown, the embodiments of this disclosure do not limit the spiral engraving method of the spiral groove 215. For example, the distance K1 between the end 2151 of the spiral groove 215 near the electrode structure 200 and the end of the electrode structure 200 near the spiral groove 215 is at least one of 5mm-10mm, 8mm-15mm, 12mm-18mm, and 14mm-16mm, but the embodiments of this disclosure are not limited to this. For example, the length K2 of the spiral groove 215 refers to the length of the spiral groove 215 in the Z direction. For example, the length K2 of the spiral groove 215 can be at least one of 30mm-80mm, 40mm-60mm, 30mm-80mm, and 45mm-90mm, but the embodiments of this disclosure are not limited to this.

[0122] Figure 15 A schematic diagram of the electrode structure and pull rod in an ablation device provided for at least one embodiment of this disclosure; Figure 16 for Figure 15 A schematic diagram of the tie rod structure of the ablation device.

[0123] For example, refer to Figure 12 and Figure 15 Compared to ablation device 020, in ablation device 021, the pull rods 211-A include a first sub-pull rod 2111 and a second sub-pull rod 2112 that are detachably connected. Along the extension direction of the pull rods 211-A, i.e., the Z direction, the first sub-pull rod 2111 is closer to the electrode structure 200 than the second sub-pull rod 2112, and the other structures are the same.

[0124] For example, refer to Figure 12 and Figure 15 The first sub-pull rod 2111 can be a part of the pull rods 211-A near the electrode structure 200. For example, the dimension of the first sub-pull rod 2111 in the Z direction can be 5mm to 10mm, but the embodiments of this disclosure are not limited to this. For example, the second sub-pull rod 2112 can be the part of the pull rods 211-A excluding the first sub-pull rod 2111, but the embodiments of this disclosure are not limited to this. Since the pull rods 211-A are disposed inside the conduit, when the first sub-pull rod 2111 and the second sub-pull rod 2112 are disassembled, the flexibility of the portion of the conduit located between the first sub-pull rod 2111 and the second sub-pull rod 2112 can be effectively improved, which is beneficial for the electrode structure 200 to bend during ablation, thereby making the ablation device 021 have good flexibility.

[0125] For example, refer to Figure 12 , Figure 15 as well as Figure 16The first sub-rod 2111 and the second sub-rod 2112 in the ablation device 021 may be threadedly connected, but the embodiments of this disclosure are not limited to this. For example, the end of the second sub-rod 2112 away from the first sub-rod 2111 may be connected to a control handle 213 to control the connection or disconnection of the first sub-rod 2111 and the second sub-rod 2112 at position 2113, but the embodiments of this disclosure are not limited to this. For example, when the ablation device 021 needs to be bent, the first sub-rod 2111 and the second sub-rod 2112 are disconnected from each other to enhance the flexibility of the conduit 212 and facilitate the bending operation. For example, when the bending operation is completed, the first sub-rod 2111 and the second sub-rod 2112 are reconnected, thereby enabling the electrode structure 200 of the ablation device 021 to undergo an overall ablation operation.

[0126] This makes the connection or disassembly between the first sub-lever 2111 and the second sub-lever 2112 more flexible and controllable, thereby enhancing the ablation efficiency of the ablation device 021.

[0127] Figure 17 A schematic diagram of another ablation device provided for at least one embodiment of this disclosure.

[0128] For example, refer to Figure 17 ,and Figure 14 Compared to the ablation device 020, the structures of catheters 212-A are different from those of catheter 212, but all other structures are the same. For example, in the ablation device 022, along the direction from the electrode structure 200 to the control handle 213, i.e., the Z direction, catheters 212-A include a first sub-catheter 2121, a second sub-catheter 2122, and a third sub-catheter 2123 connected in sequence. The hardness of the first sub-catheter 2121 is less than that of the second sub-catheter 2122, and the hardness of the second sub-catheter 2122 is less than that of the third sub-catheter 2123.

[0129] This configuration allows the first sub-conduit 2121 to have a lower hardness than other parts of the conduits 212-A during ablation, and the second sub-conduit 2122 to have a lower hardness. This makes it easier to bend the electrode structure 200, allowing for more flexible control of the electrode structure 200 and improving the ablation efficiency of the ablation device 022.

[0130] For example, refer to Figure 17In the ablation device 022, the first sub-catheter 2121 has a dimension of 20mm to 100mm in the extension direction (i.e., the Z direction) of the pull rod 211. For example, this dimension can be 30mm to 50mm. For example, this dimension can be 40mm to 60mm. For example, this dimension can be 35mm to 55mm. For example, this dimension can be 25mm to 75mm, but the embodiments of this disclosure are not limited to these.

[0131] For example, refer to Figure 17 In the ablation device 022, the material of at least one of the first sub-catheter 2121 and the second sub-catheter 2122 may include polyether block polyamide, and the material of the third sub-catheter 2123 may include at least one of polyether block polyamide and polydodecanoic acid, but the embodiments of this disclosure are not limited thereto. This allows the catheters 212-A to have good flexibility.

[0132] Figure 18 This is a schematic diagram of the structure of another ablation device provided for at least one embodiment of the present disclosure.

[0133] For example, refer to Figure 18 In ablation device 023, with Figure 14 Compared to the ablation device 020, the structure of catheters 212-B is different from that of catheter 212, but all other structures are the same. For example, catheters 212-B include a pre-bent section 2124, which is adjacent to the end 2125 of catheters 212-B that connects to the electrode structure. The pre-bent section 2124 has a dimension of 2mm to 60mm in the extension direction (i.e., the Z direction) of catheters 212-B, and the angle between the pre-bent section 2124 and the extension direction of catheters 212-B is 0° to 30°.

[0134] For example, refer to Figure 18 The ablation device 023 can have at least two different states, such as a first state 2126 and a second state 2127. For example, when the ablation device 023 is placed in a natural cavity for ablation, it can be selected as the first state 2126, where the pre-bent section 2124 of the catheter 212-B and the other parts of the catheter 212-B extend along the Z direction, or extend approximately along the Z direction. For example, when the ablation device 023 reaches the designated turning position, it can present the second state 2127, where there is an angle between the pre-bent section 2124 and the extension direction (i.e., the Z direction) of the catheter 212-B. For example, the size of this angle can be set according to the degree of curvature of the natural cavity, such as 15°, 20°, 25°, etc., which is not limited in the embodiments of this disclosure.

[0135] For example, the pre-bent sections 2124 of catheters 212-B are pre-shaped, for example, by using a mold with a shape corresponding to the bending state and heat-setting treatment, so that the pre-bent sections 2124 of catheters 212-B can easily undergo the above-mentioned deformation when they need to be bent. This avoids the problems of adjusting the bending degree of the pre-bent sections 2124 of catheters 212-B by applying various external forces, complicated operations, and difficulty in achieving the predetermined state, or the difficulty in stably and accurately forming the predetermined state, which could lead to ablation operation failure.

[0136] Therefore, pre-bending the portion of the catheter 212-B near the end of the electrode structure facilitates the flexible bending of the catheter 212-B, allowing the electrode structure to reach the curved and irregular natural cavity.

[0137] For example, an electrode structure and ablation device provided in at least one embodiment of this disclosure have at least one of the following beneficial technical effects:

[0138] (1) The electrode structure provided in at least one embodiment of the present disclosure includes multiple electrode parts, and each electrode part includes a first electrode wire and a second electrode wire that form an overlapping portion at the overlapping position. On the one hand, the electrode structure including multiple electrode parts can improve the overall flexibility of the electrode structure, thereby making it easier for the electrode structure to enter the bending area. On the other hand, each electrode part is a sheet-like structure formed by a small basket electrode or a part of the basket electrode, that is, a densely woven structure is used to replace a single or a small number of multiple electrode wires, which can further increase the contact area between the electrode structure and the object to be ablated.

[0139] (2) The electrode structure provided in at least one embodiment of this disclosure connects the first electrode wire and the second electrode wire to form a connecting part at the positions of the two overlapping parts corresponding to the cut-off part. This can fix the first electrode wire after the cut-off part is formed, thereby reducing the risk of misalignment or detachment of the first electrode wire and the second electrode wire, thus ensuring the density of the first electrode wire in the electrode structure and improving the ablation effectiveness. This design can prevent the first electrode wire and / or the second electrode wire at both ends of the cut-off part from becoming sharp as the size of the basket electrode along its circumferential direction increases. It also further prevents the risk of scratching the object to be ablated due to the inability to properly control the first electrode wire and / or the second electrode wire.

[0140] (3) The electrode structure provided in at least one embodiment of the present disclosure can reduce the braiding density of at least one of the first electrode wire and the second electrode wire by providing at least one cut-off portion in at least one of the first electrode wire and the second electrode wire, and effectively enhance the flexibility of the electrode structure, making the electrode structure easy to adjust. At the same time, it can also make the electrode wire density in the electrode structure higher, so as to have a good ablation effect.

[0141] The following points need to be explained:

[0142] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0143] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0144] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An electrode structure, comprising: Multiple electrode portions, each electrode portion including opposing first and second ends, wherein, The first ends of each of the electrode portions are connected to each other, and the second ends of each of the electrode portions are connected to each other; Each of the electrode portions includes a plurality of first electrode wires spaced apart from each other and arranged in sequence, and a plurality of second electrode wires spaced apart from each other and arranged in sequence, wherein each first electrode wire alternately overlaps with at least one second electrode wire, and each second electrode wire alternately overlaps with at least one first electrode wire, so as to form an overlapping portion at the position where the first electrode wire and the second electrode wire overlap. Each of the electrode portions includes a first electrode wire and a second electrode wire forming a braided strip. The plurality of braided strips include a plurality of first braided strips having a first hardness and a plurality of second braided strips having a second hardness. The first hardness is less than the second hardness, and the number of first braided strips is less than the number of second braided strips. The plurality of first braided strips are arranged adjacent to each other, and the plurality of second braided strips are arranged adjacent to each other.

2. The electrode structure according to claim 1, wherein, Each of the electrode portions includes a first electrode wire and a second electrode wire forming a basket electrode, and the main body portions of the plurality of basket electrodes are arranged alternately or in parallel.

3. The electrode structure according to claim 2, wherein, Each of the electrode portions is configured to include a protruding portion that protrudes toward the side away from the center of the straight line connecting the first end and the second end when in the open state. The electrode structure also includes a support structure disposed on the inner sidewall of the basket electrode and at the position corresponding to the pre-formed protruding portion, wherein the support structure is elongated and the extension direction of the support structure is parallel to the straight line connecting the first end and the second end.

4. The electrode structure according to claim 3, wherein, The number of the support structures is multiple, and the multiple support structures are arranged sequentially at intervals on the side away from the center of the straight line connecting the first end and the second end on the corresponding pre-formed protrusion portion of the basket electrode.

5. The electrode structure according to claim 4, wherein, Each of the support structures includes at least two support substructures, and the at least two support substructures included in each support structure are arranged at intervals along the extension direction of the support structure.

6. The electrode structure according to claim 4, wherein, The multiple support structures are spaced apart from each other, and the extension lines of the multiple support structures are intersecting and parallel to each other.

7. The electrode structure according to claim 1, wherein, The woven strip includes a hollow portion enclosed by adjacent overlapping portions.

8. The electrode structure according to claim 7, wherein, The main body portions of the plurality of braided strips are arranged in an arc shape, such that the space enclosed by the plurality of braided strips is olive-shaped.

9. The electrode structure according to claim 8, wherein, The number of braided strips is greater than or equal to 6, and the thickness of each braided strip is 0.1 mm to 2 mm.

10. The electrode structure according to claim 1, wherein, At least one of the first electrode wire and the second electrode wire includes at least one break portion located between two adjacent overlapping portions along its extension direction, wherein the first electrode wire and the second electrode wire are connected to each other at the positions of the two overlapping portions corresponding to the break portion to form a connection portion.

11. The electrode structure according to claim 10, wherein, The first electrode wire includes at least one cut-off portion located between two adjacent connection portions in the extension direction of the first electrode wire, which is a first cut-off portion. Along the arrangement direction of the first electrode wires, at least one first electrode wire is provided between two adjacent first disconnected portions.

12. The electrode structure according to claim 10, wherein, The first electrode wire includes at least one of the cut-off portions located between two adjacent connection portions in the extension direction of the first electrode wire, which is a first cut-off portion; Along the extension direction of the first electrode wire, the portion of the first electrode wire located between two adjacent first cut-off portions is the first electrode wire sub-part, and the first electrode wire sub-part overlaps with at least two second electrode wires.

13. The electrode structure according to any one of claims 10 to 12, wherein, The second electrode wire includes at least one of the cut-off portions located between two adjacent connection portions in the extension direction of the second electrode wire, which is a second cut-off portion. Along the arrangement direction of the second electrode wire, at least one second electrode wire is provided between two adjacent second disconnected portions.

14. The electrode structure according to claim 13, wherein, The first cut-off portion and the second cut-off portion have an overlapping portion. Along the extension direction of the first electrode wire, at least one first electrode wire is provided between two adjacent first cut-off portions, and at least one second electrode wire with a second cut-off portion is provided between the second electrode wires where the connecting portions are located on both sides of each first cut-off portion. Along the extension direction of the second electrode wire, at least one first electrode wire having the first cut-off portion is provided between the first electrode wires where the connecting portions are located on both sides of each second cut-off portion.

15. The electrode structure according to claim 14, wherein, The four overlapping portions formed by the first electrode wire with the first cut portion adjacent to each other in the arrangement direction of the first electrode wire and the second electrode wire with the second cut portion adjacent to each other in the arrangement direction of the second electrode wire are sequentially connected to form a first quadrilateral; the minimum area of ​​the quadrilateral formed by the sequential connection of the overlapping portions formed by the overlapping portions formed by the overlapping portions of the two adjacent first electrode wires and the two adjacent second electrode wires is 1 / 5 to 1 / 2 of the area of ​​the first quadrilateral.

16. An ablation device, comprising an electrode structure, a pull rod, a conduit, and a control handle as described in any one of claims 1 to 15, wherein, The electrode structure includes a first end and a second end opposite to each other in the extension direction of the pull rod; A portion of the pull rod is sleeved in the conduit, and the portion of the pull rod extending outside the conduit passes through the electrode structure. The first end of the electrode structure is connected to the end of the pull rod away from the conduit, and the second end of the electrode structure is connected to the end of the conduit near the electrode structure. The control handle is connected to the end of the pull rod away from the electrode structure and is configured to control the movement of the pull rod relative to the conduit along its axial direction to control the degree to which the electrode structure opens.

17. The ablation device according to claim 16, wherein, A spiral groove is provided on the outer wall of the part of the pull rod that connects to the electrode structure. In the extension direction of the pull rod, the distance between the end of the spiral groove near the electrode structure and the end of the electrode structure near the spiral groove is 1 mm to 20 mm, and the length of the spiral groove is 20 mm to 100 mm.

18. The ablation device according to claim 16, wherein, The pull rod includes a first sub-pull rod and a second sub-pull rod that are detachably connected, with the first sub-pull rod being closer to the electrode structure relative to the second sub-pull rod along the extension direction of the pull rod.

19. The ablation device according to claim 18, wherein, The first sub-pull rod is threadedly connected to the second sub-pull rod.

20. The ablation device according to claim 16, wherein, Along the direction of the electrode structure toward the control handle, the conduit includes a first sub-conduit, a second sub-conduit, and a third sub-conduit connected in sequence. The hardness of the first sub-conduit is less than that of the second sub-conduit, and the hardness of the second sub-conduit is less than that of the third sub-conduit.

21. The ablation device according to claim 20, wherein, The first sub-conduit has a dimension of 20 mm to 100 mm in the extension direction of the pull rod. The material of at least one of the first sub-catheter and the second sub-catheter comprises polyether block polyamide, and the material of the third sub-catheter comprises at least one of polyether block polyamide and polydodecanoic acid.

22. The ablation device according to claim 16, wherein, The pull rod includes a pre-bent section, which is adjacent to the end of the pull rod that is connected to the electrode structure. The pre-bent section has a dimension of 2 mm to 60 mm in the extension direction of the pull rod, and the angle between the pre-bent section and the extension direction of the pull rod is 0° to 30°.

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