Electrosurgical device

Abstract

The application provides an electric ablation device, which comprises a support body, a feeding end and at least one ablation unit; each ablation unit comprises a surrounding part and at least one contact part; the surrounding part is arranged at the periphery of the support body; each contact part comprises two contact sections, one end of each of the two contact sections is connected to the surrounding part, the other end of at least one of the two contact sections is connected to the feeding end, and the two contact sections at least partially contact and extend. Through the above design, the electric ablation device can realize a larger contact area by the contact arrangement of the two contact sections of the contact part, improve the stability of the electric connection, make the same current flow through the two contact sections at the same time, thereby ensure that the electric potential of the contact positions of the two contact sections is equal, avoid the generation of the electric potential difference, and thus reduce the possibility of the generation of the electric spark of the ablation unit.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an electroablation device. Background Technology

[0002] Pulsed ablation is a method of ablation that uses multiple high-voltage electrical pulses applied to the phospholipid bilayer within a short period of time, causing the formation of a transmembrane potential and resulting in irreversible penetrating damage to the cell. The frequency range of the high-voltage electrical pulses is 500Hz-30MHz, and the voltage range is from several hundred volts to tens of thousands of volts.

[0003] During the ablation process where high-voltage electricity is used to ablate target tissue, if the contact area at the connection point of the high-voltage transmission line is small, poor contact can easily occur, leading to a large local potential difference. This results in a strong electric field around the poorly connected area, causing increased dissociation of liquid molecules, increasing the conductivity of the strong field region, and generating a large number of bubbles. Bubbles accumulating near the connection point of the high-voltage line are easily broken down by the high-voltage electricity, forming an electric spark. This electric spark can easily form an eschar in the body, and may even cause cardiac perforation leading to pericardial effusion. Summary of the Invention

[0004] A primary objective of this invention is to overcome at least one of the deficiencies of the prior art and to provide an electrical ablation device with better electrical connection performance and less tendency to generate electrical sparks.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to one aspect of the present invention, an electroablation device is provided, comprising a support body, a power supply terminal, and at least one ablation unit; each ablation unit includes a surrounding portion and at least one contact portion; the surrounding portion is disposed around the periphery of the support body; each contact portion includes two contact segments, one end of each of the two contact segments is respectively connected to the surrounding portion, and the other end of at least one of the two contact segments is connected to the power supply terminal, wherein the two contact segments extend in at least partial contact.

[0007] As can be seen from the above technical solution, the advantages and positive effects of the electroablation device proposed in this invention are as follows:

[0008] Each ablation unit of the electroablation device proposed in this invention includes a surrounding portion and at least one contact portion. The surrounding portion is disposed around the periphery of the support body. Each contact portion includes two contact segments, one end of each contact segment being connected to the surrounding portion and the other end being connected to the power supply end, with the two contact segments extending in contact at least partially. Through the above design, this invention can achieve a larger contact area by utilizing the contact arrangement of the two contact segments, improving the stability of the electrical connection, and ensuring that the same current flows through both contact segments simultaneously. This guarantees that the potential at the contact position of the two contact segments is equal, avoiding the generation of a potential difference, thereby reducing the possibility of electrical sparks generated by the ablation unit. Attached Figure Description

[0009] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0010] Figure 1 This is a schematic diagram of the structure of an electroablation device according to an exemplary embodiment;

[0011] Figure 2 yes Figure 1 A simplified structural diagram of part of the electroablation device from a top-down view;

[0012] Figures 3 to 7 These are schematic diagrams of a portion of the structure of an electroablation device according to another exemplary embodiment, viewed from a top view.

[0013] Figure 8 This is a perspective view of a portion of the structure of an electroablation device according to another exemplary embodiment;

[0014] Figure 9 This is a schematic diagram of the structure of an electroablation device according to another exemplary embodiment;

[0015] Figure 10 This is a schematic diagram of the structure of an electroablation device according to another exemplary embodiment;

[0016] Figure 11 yes Figure 10 A top view of the electroablation device shown;

[0017] Figure 12 This is a schematic diagram of the structure of an electroablation device according to another exemplary embodiment;

[0018] Figure 13 This is a schematic diagram of the structure of an electroablation device according to another exemplary embodiment.

[0019] The annotations in the attached figures are explained as follows:

[0020] 100. Support structure;

[0021] 200. Feeder terminal;

[0022] 210. Inner sleeve;

[0023] 220. Outerwear;

[0024] 300. Ablation unit;

[0025] 310. Surrounding part;

[0026] 311. Middle section;

[0027] 320. Contact part;

[0028] 321. Contact section;

[0029] 410, 510. First plate structure;

[0030] 411, 511. Support rods;

[0031] 420, 520. Second plate structure;

[0032] 610. Delivery conduit;

[0033] 620. Pull rod;

[0034] 621. Stent. Detailed Implementation

[0035] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the description and drawings therein are for illustrative purposes only and not intended to limit the present invention.

[0036] In the following description of different exemplary embodiments of the invention, reference is made to the accompanying drawings, which form part of the invention, and in which different exemplary structures, systems, and steps that can implement various aspects of the invention are shown by way of example. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. Furthermore, although the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of the invention, these terms are used herein only for convenience, such as the orientation according to the examples shown in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the invention.

[0037] See Figure 1 The diagram illustrates a representative structural schematic of the electroablation device proposed in this invention in an exemplary embodiment. In this exemplary embodiment, the electroablation device is described using an occluder or ablation catheter as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the following specific embodiments to apply the relevant designs of this invention to other types of medical devices with ablation functions; these changes remain within the scope of the principles of the electroablation device proposed in this invention.

[0038] like Figure 1 As shown, in one embodiment of the present invention, the proposed electroablation device is a left atrial appendage occlusion ablation device, used for occlusion and pulse ablation of the left atrial appendage. The electroablation device includes a support body, a power supply terminal 200, and an ablation unit 300. (See also...) Figure 2 , Figure 2 The diagram shows a simplified top-view structural diagram of a portion of the electroablation device that embodies the principles of this invention, specifically illustrating the power supply terminal 200 and the ablation unit 300. Figure 2 The arrows in the diagram specifically indicate the direction of current flow. The feed terminal 200 is used to electrically connect to the pulse generator and transmit the pulse ablation energy output by the pulse generator to the ablation unit 300. The ablation unit 300 is used to perform pulse ablation on tissue using the pulse ablation energy provided by the feed terminal 200. The structure, connection method, and functional relationship of the main components of the electroablation device proposed in this invention will be described in detail below with reference to the above-described figures.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the ablation unit 300 includes a surrounding portion 310 and a contact portion 320. The surrounding portion 310 is disposed around the periphery of the support. The contact portion 320 includes two contact segments 321, one end of each of the two contact segments 321 being connected to the surrounding portion 310, and the other end of each of the two contact segments 321 being connected to the power supply terminal 200. The two contact segments 321 extend in contact with each other at least partially. Through the above design, the present invention can achieve a larger contact area by utilizing the contact arrangement of the two contact segments 321 of the contact portion 320, thereby improving the stability of the electrical connection and ensuring that the same current flows through both contact segments 321 simultaneously. This guarantees that the potential at the contact position of the two contact segments 321 is equal, avoiding potential differences and reducing the possibility of electrical sparks generated by the ablation unit.

[0040] like Figure 2 As shown, in one embodiment of the present invention, the contact portions of the two contact segments 321 of the same contact portion 320 extend in parallel.

[0041] like Figure 2 As shown, based on the design of the parallel extension of the contact portions of the two contact segments 321, in one embodiment of the present invention, the two contact segments 321 of the same contact portion 320 extend directly in parallel without crossing after extending from the surrounding portion 310.

[0042] like Figure 2 As shown, in one embodiment of the present invention, after the two contact segments 321 extend by a certain distance, they are respectively connected to the power supply terminal 200. In some embodiments, after the two contact segments 321 extend by a certain distance, only one of the contact segments 321 may be connected to the power supply terminal 200, and this embodiment is not the limitation.

[0043] In one embodiment of the present invention, the contact segment 321 can be connected to the power supply terminal 200 by spot welding.

[0044] In one embodiment of the present invention, the ablation unit 300 may be an electrode wire. Accordingly, the diameter of the circumferential portion 310 is relatively small and its flexibility is strong, which has little impact on the mechanical properties of the electroablation device and facilitates the loading and unloading of the electroablation device. In some embodiments, the ablation unit 300 may also be a strip-shaped electrode sheet, and is not limited to this embodiment.

[0045] Based on the design of the ablation unit 300 as an electrode wire, in one embodiment of the present invention, the ablation unit 300 can also be a bundle of multiple electrode wires. Accordingly, compared to a single electrode wire with a larger diameter, a bundle of multiple electrode wires offers better flexibility, facilitating the loading and unloading of the electroablation device and preventing excessive radial deformation during loading and unloading that could break the ablation unit 300. Compared to a single electrode wire of the same diameter, a larger ablation current can be allowed to pass through, reducing the likelihood of the ablation unit 300 burning out due to overcurrent during the ablation process.

[0046] Based on the ablation unit 300 being composed of bundled multi-strand electrode wires, in one embodiment of the present invention, the bundled multi-strand electrode wires are interwoven, for example, hinged together. Accordingly, the design of interwoven multi-strand electrode wires in the present invention further improves flexibility and concentrates ablation energy, ensuring ablation depth and ablation effect. This avoids the situation where, after the electroablation device is applied to the target tissue, the different electrode wires in the ablation unit 300 bend in different directions, resulting in large gaps between the different electrode wires, dispersed ablation energy, shallow ablation depth, and poor ablation effect.

[0047] like Figure 1 As shown, in one embodiment of the present invention, the surrounding portion 310 may be arranged at the periphery of the outermost ring of the support 100.

[0048] In one embodiment of the present invention, the surrounding portion 310 may be fixed to the support body 100 by adhesive bonding. In some embodiments, the surrounding portion 310 may also be fixed to the support body 100 by other means, such as welding or sewing.

[0049] In one embodiment of the present invention, the support 100 includes a plurality of interconnected support rods, and a mesh area is formed between the plurality of support rods.

[0050] Based on the design of the support body 100 including multiple support rods, in one embodiment of the present invention, the multiple support rods in the support body 100 are made of conductive material, and the outer periphery of the contact portion of the two contact segments 321 of the contact portion 320 may be provided with an insulating layer.

[0051] Furthermore, at least one section of the contact portion of the two contact segments 321 extends in the mesh area formed between the multiple support rods, thereby reducing the proportion of the contact segments 321 arranged along the support rods and preventing the contact segments 321 from being electrically coupled to the support rods, which would cause the support rods to become conductive.

[0052] Through the above design, the insulating layer can mechanically fix the contact portion of the two contact segments 321, improve the contact strength of the two contact segments 321, ensure the stability of the electrical connection, and avoid the generation of electric sparks. In addition, since the surrounding portion 310 of the ablation unit 300 is close to the tissue, it is an easy part to ablate the tissue. However, the contact portion of the two contact segments 321 only serves as a conductor and does not need to ablate the tissue. Therefore, by using the insulating layer to insulate the outer surface of the contact portion of the two contact segments 321, it is possible to prevent the contact portion from discharging into the tissue or body fluid, thus consuming electrical energy. This allows the ablation energy to be concentrated in the middle segment, which is beneficial to increasing the ablation depth of the surrounding portion 310 and forming a ring-shaped ablation band.

[0053] In one embodiment of the present invention, for example Figure 13 In the illustrated embodiment, the outer periphery of the support rod may be covered with an insulating layer. Furthermore, the contact portions of the two contact segments 321 of the contact portion 320 may be arranged along the support rod, and the insulating layer covering the outer periphery of the support rod also covers the contact portions of the two contact segments.

[0054] In one embodiment of the invention, the insulating layer covering the contact segment 321 can be an insulating film, such as a heat-shrinkable film, thereby achieving mutual insulation between adjacent contact segments 321 and the support rod. In some embodiments, the insulating layer can also be a coated insulating material or an insulating sleeve fitted around the periphery of the contact segment 321.

[0055] like Figure 1As shown, in one embodiment of the present invention, the support 100 can be a support skeleton. The support skeleton can be a support with a perforated mesh formed by weaving or cutting processes. The support skeleton can be made of biocompatible metallic or non-metallic materials. In some embodiments, the support 100 can also be a balloon or similar structure.

[0056] The electroablation device includes a disc structure, a first disc structure, which has a support body 100. The first disc structure includes a sealing portion disposed at a proximal end and an anchoring portion disposed at a distal end. The sealing portion and the anchoring portion are interconnected and integrally formed. The sealing portion is used to seal the opening of the left atrial appendage, and the anchoring portion is used to anchor to the internal tissues of the left atrial appendage. Figure 1 In the illustrated embodiment, the power supply end 200 is located at the proximal end of the support body 100. It is understood that in other embodiments, the power supply end is located at the distal end of the support body 100, or between the proximal and distal ends of the support body 100.

[0057] In one embodiment of the present invention, the power supply terminal 200 may be made of stainless steel. In some embodiments, the power supply terminal 200 may also be made of other metallic materials, such as copper (Cu), silver (Ag), gold (Au), or nickel-titanium alloy.

[0058] In one embodiment of the present invention, the electroablation device proposed in this invention may include two ablation units 300 of different polarities. The two ablation units 300 are used to transmit the same or different pulse ablation energies, for example, to transmit pulse ablation energies of different polarities. A certain distance is maintained between the two ablation units 300.

[0059] See Figure 3 The diagram shows a schematic top view of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0060] like Figure 3 As shown, based on the design of two contact segments 321 extending in parallel at least partially based on the same contact portion 320, in one embodiment of the present invention, a portion of the two contact segments 321 intersects, and the other portion extends in parallel.

[0061] like Figure 2 and Figure 3As shown, based on the design of two contact segments 321 extending in parallel at least partially on the same contact portion 320, in one embodiment of the present invention, both contact segments 321 can be straight, making the contact portion 320 as a whole straight. In some embodiments, the contact segments 321 can also be arc-shaped, such as corrugated, or other shapes, such as serrated, making the contact portion 320 as a whole serrated or arc-shaped.

[0062] See Figure 4 The diagram shows a schematic top view of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0063] like Figure 4 As shown, in one embodiment of the present invention, the two contact segments 321 of the same contact portion 320 are at least partially braided. Specifically, the braiding can be a twisted, wound form as illustrated, or other braiding forms. Furthermore, the portion of the two contact segments 321 braided together can be generally straight or curved (e.g., corrugated), or other shapes, such as serrated.

[0064] like Figure 4 As shown, based on the design of at least partially woven contact extension of two contact segments 321 of the same contact portion 320, in one embodiment of the present invention, both contact segments 321 may be arc-shaped, such as corrugated. In some embodiments, the two contact segments 321 of the same contact portion 320 may also be serrated or other shapes that can achieve weaving, and are not limited to this embodiment.

[0065] In one embodiment of the present invention, the middle section 311 of the surrounding portion 310 can be composed of n electrode wires, and each contact section 321 can be composed of n electrode wires. Therefore, the contact portion consists of 2n electrode wires twisted together. Preferably, the middle section 311 can be composed of n electrode wires twisted together, where n is a positive integer greater than or equal to 2. See also... Figure 5 The diagram shows a schematic top view of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0066] like Figure 5 As shown, based on the design of two contact segments 321 of the same contact portion 320 extending in at least partially parallel contact, in one embodiment of the invention, the ends of the two contact segments 321 of at least one contact portion 320 that are away from the surrounding portion 310 are connected. Based on this, the contact portion 320 is connected to the power supply terminal 200 via the end where the two contact segments 321 are connected.

[0067] like Figures 1 to 5 As shown, in some embodiments of the present invention, the electroablation device is provided with only one ablation unit 300, which is beneficial to reduce the number of connection points on the electrical pulse transmission line, reduce the complexity of the high-voltage pulse transmission line, reduce the generation of electrical sparks, and reduce the size of the delivery sheath.

[0068] In some embodiments of the present invention, the surrounding portion 310 includes at least one intermediate segment 311, and the head and tail ends of each intermediate segment 311 of the surrounding portion 310 are arranged sequentially to surround the support body 100. Based on this, each intermediate segment 311 has a contact segment 321 connected to its head and tail ends respectively. The contact segments 321 connected to adjacent head and tail ends extend at least partially into contact, and the two contact segments 321 connected to adjacent head and tail ends together define the contact portion 320.

[0069] It should be noted that, in Figures 2 to 5 In the illustrated embodiment, the surrounding portion 310 includes only one intermediate segment 311. In some embodiments, the surrounding portion 310 may also include at least two intermediate segments 311. Alternatively, when the electroablation device includes at least two ablation units 300, at least one ablation unit 300 may have a surrounding portion 310 including one intermediate segment 311, and at least one ablation unit 300 may have a surrounding portion 310 including at least two intermediate segments 311. Alternatively, the surrounding portions 310 of each ablation unit 300 may each include only one intermediate segment 311, or each may each include at least two intermediate segments 311. The number of intermediate segments 311 in the surrounding portions 310 included by each ablation unit 300 may be the same or different.

[0070] like Figure 1 and Figure 2 As shown, based on the design of the surrounding portion 310 including at least one intermediate segment 311, in one embodiment of the present invention, a surrounding portion 310 includes an intermediate segment 311, thereby the two contact segments 321 of the same contact portion 320 are respectively connected to the head end and the tail end of the same intermediate segment 311.

[0071] See Figure 6 The diagram shows a schematic top view of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0072] like Figure 6As shown, in one embodiment of the present invention, a surrounding portion 310 includes two intermediate segments 311. Specifically, the head and tail ends of the two intermediate segments 311 of the surrounding portion 310 are arranged sequentially around the support body, that is, the head end of one intermediate segment 311 corresponds to the tail end of the intermediate segment 311 of the other surrounding portion 310. Based on this, a contact segment 321 connected to the head end of one intermediate segment 311 at least partially contacts and connects to the feed terminal 200 with a contact segment 321 connected to the adjacent tail end of the other intermediate segment 311. Through the above design, the present invention can make the electric field more uniform. Specifically, multiple intermediate segments 311 of a surrounding portion 310 are simultaneously fed to the feed terminal 200 through each contact segment 320. The current flowing through each intermediate segment 311 is equal in magnitude, and the intermediate segments 311 surrounding the support body have the same length, the same charge, and the same current density. The electric field distribution around different intermediate segments 311 is basically the same.

[0073] like Figure 6 As shown, based on the design of a surrounding portion 310 of an ablation unit 300 including two intermediate segments 311, in one embodiment of the present invention, the lengths of the two intermediate segments 311 along the circumferential direction of the support can be approximately equal. In other words, the arcs corresponding to the extension paths of the two intermediate segments 311 along the circumferential direction of the support are approximately equal, and the sum of the arcs is 360°. That is, the two intermediate segments 311 are arranged symmetrically and uniformly along the circumferential direction of the support. Figure 6 In the illustrated embodiment, the arc of each of the two intermediate segments 311 is approximately half of 360°, i.e., 180°.

[0074] In some embodiments, the entire ablation unit 300 is made of a single electrode wire. The single electrode wire constituting the ablation unit 300 forms multiple intermediate sections and multiple contact portions, that is, the single electrode wire extends towards and contacts the power supply end 200 multiple times. Herein, the single electrode wire includes at least one electrode wire.

[0075] See Figure 7 The diagram shows a schematic top view of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0076] like Figure 7As shown, in one embodiment of the present invention, the surrounding portion 310 of an ablation unit 300 includes four intermediate segments 311. Specifically, the head and tail ends of these four intermediate segments 311 are arranged sequentially around the support body, that is, the head end of any intermediate segment 311 corresponds to the tail end of an adjacent intermediate segment 311. Furthermore, a contact segment 321 connected to the head end of one intermediate segment 311 at least partially contacts and connects to the contact segment 321 connected to the adjacent tail end of another intermediate segment 311, and is connected to the power supply terminal 200.

[0077] like Figure 7 As shown, based on the design of a surrounding portion 310 of an ablation unit 300 including four intermediate segments 311, in one embodiment of the present invention, the lengths of the four intermediate segments 311 along the circumferential direction of the support can be approximately equal. In other words, the arcs corresponding to the extension paths of the four intermediate segments 311 along the circumferential direction of the support are approximately equal, and the sum of the arcs is 360°. That is, the four intermediate segments 311 are arranged symmetrically and uniformly along the circumferential direction of the support. Figure 7 In the illustrated embodiment, the arc of each of the four intermediate segments 311 is approximately one-quarter of 360°, or 90°. When the two contact segments 321 of the contact portion 320 are not connected at their ends away from the surrounding portion 310, the ablation unit 300, which includes multiple intermediate segments 311, can be composed of multiple electrode wires, where one electrode wire can form one intermediate segment 311 and two contact segments 321. When the two contact segments 321 of the contact portion 320 are connected at their ends away from the surrounding portion 310, the ablation unit 300, which includes multiple intermediate segments 311, can be composed of a single electrode wire.

[0078] It should be noted that, unlike Figures 2 to 5 The illustrated implementation is in Figure 6 and Figure 7 In the illustrated embodiment, the surrounding portion 310 of an ablation unit 300 of the electroablation device may include at least two intermediate segments 311. In some embodiments, an ablation unit 300 may also include at least two surrounding portions 310, such as two, three, four, five, etc. Furthermore, the intermediate segments 311 of the surrounding portion of an ablation unit 300 may be evenly arranged. This structure results in a small potential difference among the intermediate segments 311 distributed around the periphery of the support, thereby facilitating the formation of a uniform and sufficiently strong electric field with other ablation units or other components used for ablation of tissue.

[0079] Furthermore, when the electroablation device includes at least two ablation units 300, the number of intermediate segments 311 in the surrounding portion 310 of each ablation unit 300 may be the same or different. For example, at least one ablation unit 300 may have a surrounding portion 310 including one intermediate segment 311, and at least one ablation unit 300 may have a surrounding portion 310 including at least two intermediate segments 311. Alternatively, each ablation unit 300 may have a surrounding portion 310 including only one intermediate segment 311 or at least two intermediate segments 311. In addition, when the surrounding portion 310 of an ablation unit 300 includes at least two intermediate segments 311, for any intermediate segment 311, it may be connected to the power supply terminal 200 through two contact segments 321 respectively connected to its head end and tail end, or it may be connected to the power supply terminal 200 through only one of the two contact segments 321 connected to its head end and tail end.

[0080] like Figure 6 and Figure 7 As shown, when the electroablation device includes at least two ablation units 300, based on the design of the surrounding portion 310 including at least one intermediate segment 311, in one embodiment of the present invention, the surrounding portion 310 of an ablation unit 300 includes a plurality of intermediate segments 311, and the two contact segments 321 of the contact portion 320 are respectively connected to the head end of one intermediate segment 311 and the adjacent tail end of the other intermediate segment 311.

[0081] Additionally, similar to Figure 4 The illustrated implementation is in Figure 6 and Figure 7 In the illustrated embodiment, adjacent contact segments extend in a braided manner. In some embodiments, when the circumferential portion 310 of an ablation unit 300 includes at least two intermediate segments 311, the two contact segments 321 belonging to the same contact portion 320 may also extend in other forms, such as... Figure 2 or Figure 3 The forms of parallel contact extension shown are not limited thereto.

[0082] As described above, in various possible embodiments conforming to the design concept of the electroablation device proposed in this invention, the surrounding portion 310 of each ablation unit 300 includes at least one intermediate segment 311 disposed on the support body. The head and tail ends of each intermediate segment 311 of the same surrounding portion 310 are arranged sequentially around the support body, and two contact segments 321 belonging to the same contact portion 320, that is, two contact segments 321 adjacent to adjacent head and tail ends respectively, contact and connect to the power supply terminal 200. In addition, the electroablation device may include at least one ablation unit 300, and the number of intermediate segments 311 included in the surrounding portion 310 of each ablation unit 300 is not limited.

[0083] It should be noted that, in order to more clearly show the shape of the two contact segments 321 of the contact portion 320, Figures 2 to 7 The structure shown adds a gap between two contact segments 321 that are at least partially parallel or woven together. It should be understood that, in the specific embodiments of this application, at least one of the two contact segments 321 of the contact portion 320 is in parallel contact or woven together, that is, the two contact segments 321 are at least partially in contact, as hereby stated.

[0084] See Figure 8 The diagram shows a three-dimensional schematic of a portion of the structure of the electroablation device proposed in another exemplary embodiment of the present invention, specifically showing the power supply terminal 200 and the ablation unit 300.

[0085] like Figure 8 As shown, in one embodiment of the present invention, at least one contact segment 321 may be connected to a connecting segment at its end away from the intermediate segment 311, thereby enabling the contact segment 321 to be connected to the power supply terminal 200 via the connecting segment. In some embodiments, the contact segment 321 may also be directly connected to the power supply terminal 200 via its end away from the intermediate segment 311. Furthermore, the locations at which the two contact segments 321 of the same contact portion 320 are connected to the power supply terminal 200 may be the same or different, for example, but not limited to including the end away from the intermediate segment 311 or the connecting segment connected to that end.

[0086] like Figure 8 As shown, in one embodiment of the present invention, the power supply terminal 200 may include an inner sleeve 210 and an outer sleeve 220. Specifically, the outer sleeve 220 is fitted around the outer periphery of the inner sleeve 210, creating a gap between the outer sleeve 220 and the inner sleeve 210. Based on this, both contact segments 321 of the same contact portion 320 extend into and are fixed at this gap. Further, when a connecting segment is connected to the contact segment 321, the contact segment 321 can specifically extend into and be fixed at the gap via the connecting segment. Accordingly, the present invention enables the contact segment 321 of the contact portion 320 to be reliably and securely fixed at the aforementioned gap of the power supply terminal 200, and to have good conductivity, thereby avoiding short circuits and other adverse conditions caused by poor contact of the contact portion 320. In addition, the contact segment 321 of the contact portion 320 and the power supply terminal 200 may be fixedly connected by, but is not limited to, spot welding. In some embodiments, the power supply terminal 200 may also adopt other structures. For example, the power supply terminal 200 may also include a lower fixing part and an upper fixing part, such as a threaded structure. The upper fixing part is disposed on the top of the lower fixing part, thereby the two contact segments 321 of the same contact part 320 extend into and are fixed in the gap between the lower fixing part and the upper fixing part.

[0087] See Figure 9The diagram illustrates a schematic representation of the electroablation device proposed in another exemplary embodiment of the present invention.

[0088] like Figure 9 As shown, different from Figure 1 In the illustrated embodiment, at least one segment of the surrounding portion 310 has a straight orthographic projection on a plane parallel to the axial direction of the support 100. When the surrounding portion 310 is entirely straight, it forms a generally regular ring structure. In one embodiment of the invention, the orthographic projection of at least one segment of the surrounding portion 310 on a plane parallel to the axial direction of the support 100 can also be serrated. Specifically, the serrated surrounding portion 310 is formed by bending along the axial direction of the support to create a serrated structure, while still maintaining its circumferential arrangement around the support. Through this design, the serrated surrounding portion 310 facilitates the loading and unloading of the electroablation device. In some embodiments, the orthographic projection of the surrounding portion 310 on a plane parallel to the axial direction of the support 100 can also be other shapes, such as wavy. Furthermore, the surrounding portion 310 can also partially protrude radially along the support, forming a wreath around the support with the "petals" of the wreath protruding radially.

[0089] See Figure 10 and Figure 11 , Figure 10 The diagram above represents a structural schematic of the electroablation device proposed in another exemplary embodiment of the present invention; Figure 11 China representatively shows Figure 10 A top view of the electroablation device is shown.

[0090] like Figure 10 and Figure 11 As shown, in one embodiment of the present invention, the electroablation device proposed in this invention can be a left atrial appendage occlusion ablation device, which includes two disc structures, namely a first disc structure 410 and a second disc structure 420. Taking an occluder as an example, the first disc structure 410 and the second disc structure 420 can be the anchoring disc and the sealing disc of the occluder, respectively. The anchoring disc is used to contact and anchor to the inner wall tissue of the left atrial appendage, and the sealing disc is used to seal the opening of the left atrial appendage.

[0091] Each disc structure has a support, and the ablation unit 300 is disposed on the support of one of the disc structures. Specifically, the ablation unit 300 is disposed on the support of the first disc structure 410. In some embodiments, multiple ablation units 300 are disposed on the support of the first disc structure 410, or, when the electroablation device includes a first disc structure 410 and a second disc structure 420, the ablation unit 300 may also be disposed on the support of the second disc structure 420, or the electroablation device may also have ablation units 300 disposed on the support of the first disc structure 410 and the support of the second disc structure 420 respectively. Furthermore, the electroablation device proposed in this invention may include only one disc structure, or may include three or more disc structures. In this case, the support of at least one disc structure of the electroablation device is provided with a plurality of ablation units 300, and the specific shape, manufacturing process, and connection relationship between each disc structure are not limited to this embodiment.

[0092] like Figure 10 and Figure 11 As shown, in one embodiment of the present invention, the first disc structure 410 has a plurality of support rods 411 arranged at intervals at its far end, and the end of any support rod 411 is connected to the end of an adjacent support rod 411.

[0093] like Figure 10 As shown, in one embodiment of the present invention, the second disk structure 420 may be generally frustoconical. In some embodiments, the second disk structure 420 may also have other structures, such as a disk shape, etc., and is not limited thereto.

[0094] See Figure 12 , Figure 12 The diagram above shows a schematic representation of the electroablation device proposed in another exemplary embodiment of the present invention.

[0095] like Figure 12 As shown, different from Figure 10 In the illustrated embodiment, the end of any support rod 411 of the first disc structure 410 is connected to the end of the adjacent support rod 411. In one embodiment of the present invention, the ends of multiple support rods 511 arranged at intervals at the far end of the first disc structure 510 are arranged independently and are not connected.

[0096] like Figure 12 As shown, in one embodiment of the present invention, the second disk structure 520 may be generally conical in shape.

[0097] like Figure 10 or Figure 12As shown, in some embodiments of the present invention, when the electroablation device includes multiple disc structures, at least one of these disc structures may not be provided with an ablation unit 300. Based on this, the support body of the disc structure without the ablation unit 300 can be connected to an external ablation signal source to discharge onto the tissue, thereby serving as an electroablation device. For example, an ablation unit 300 can be provided on the first disc structures 410 and 510, and the support body of the second disc structures 420 and 520 is at least partially made of a conductive material. The support body 100 made of conductive material is partially used for electrical connection to an external ablation signal source for electroablation, thereby achieving a design where the occluder has two ablation sections. It is understood that in... Figure 1 In the illustrated embodiment, the first disc structure includes a support 100, which is at least partially made of a conductive material, and the portion of the conductive material-made support 100 is used for tissue ablation. Figure 1 , Figure 10 as well as Figure 12 In some embodiments, a delivery device for delivering the electroablation device into the patient's body, or an ablation component for ablation of tissue is provided outside the patient's body, the ablation component and the ablation unit 300 being used to transmit the same or different ablation energy, such as pulsed ablation energy of different polarities.

[0098] See Figure 13 , Figure 13 The diagram above shows a schematic representation of the electroablation device proposed in another exemplary embodiment of the present invention.

[0099] like Figure 13 As shown, in one embodiment of the present invention, the electroablation device proposed by the present invention may include only a disc structure. Taking the electroablation device as an ablation catheter as an example, the ablation catheter can be used for ablation of tissues such as pulmonary veins and renal arteries. The disc structure in the electroablation device can be the support body 621 of the ablation catheter. The ablation catheter includes a delivery catheter 610 and a traction rod 620. Specifically, the traction rod 620 is sleeved within the delivery catheter 610 and can be extended and retracted from the distal end of the delivery catheter 610. The support body 621 of the ablation catheter can be disposed on the outer periphery of the traction rod 620, and the power supply end (not shown in the figure) can be disposed on the proximal end of the traction rod 620 or in the delivery catheter 610.

[0100] like Figure 13 As shown, in one embodiment of the invention, the support 621 includes a plurality of support rods arranged axially around it, and at least one support rod may be covered with an insulating layer, such as an insulating sleeve, on its outer periphery. Based on this, a circumferential portion 310 surrounds the support 621, and at least one contact portion penetrates the insulating sleeve on the surface of at least one support rod and leads back to the power supply end.

[0101] In one embodiment of the present invention, the electroablation device includes at least a first disc structure, wherein at least a portion of the support in the first disc structure is conductive and capable of ablating tissue. Based on this, an ablation unit 300 is disposed on the first disc structure, or on other disc structures within the electroablation device, to... Figure 10 and Figure 12 In the illustrated embodiment, the ablation unit 300 is disposed on the first disk structures 410 and 510, while the second disk structures 420 and 520 do not have ablation units. In some embodiments, the second disk structures 420 and 520 may also have ablation units, or other ablation components for ablating tissue, such as other forms of electrodes, point electrodes, ring electrodes, rod electrodes, etc., or at least a portion of the support in the disk may be conductive and serve as an ablation component for ablating tissue; this is not a limitation. In some embodiments, the first disk structure 410 may have multiple ablation units 300, or may have the aforementioned ablation components in addition to the ablation units 300.

[0102] It should be noted that the electroablation devices shown in the accompanying drawings and described in this specification are merely a few examples among many electroablation devices capable of employing the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any detail or component of the electroablation devices shown in the accompanying drawings or described in this specification.

[0103] In summary, each ablation unit of the electroablation device proposed in this invention includes a surrounding portion and at least one contact portion. The surrounding portion is disposed around the periphery of the support. Each contact portion includes two contact segments, one end of each contact segment being connected to the surrounding portion and the other end being connected to the power supply end, with the two contact segments extending in contact at least partially. Through the above design, this invention can utilize the contact arrangement of the two contact segments to achieve a larger contact area, improve the stability of the electrical connection, and ensure that the same current flows through both contact segments simultaneously, thereby guaranteeing that the potential at the contact position of the two contact segments is equal, avoiding the generation of a potential difference, and thus reducing the possibility of electrical sparks generated by the ablation unit.

[0104] The exemplary embodiments of the electroablation device proposed in this invention have been described and / or illustrated in detail above. However, the embodiments of this invention are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising," "including," and "having" are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc. Furthermore, the terms "first" and "second," etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the subject matter.

[0105] Although the electroablation device proposed in this invention has been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of this invention within the spirit and scope of the claims.

Claims

1. An electroablation device, comprising: First plate structure and second plate structure. The first disk structure includes: a support body, a power supply terminal, and at least one ablation unit, each of the ablation units including: A surrounding portion is disposed at the periphery of the support; and At least one contact portion, each of the contact portions comprising two contact segments, one end of each of the two contact segments being connected to the surrounding portion, the other end of at least one of the two contact segments being connected to the power supply terminal, and the two contact segments extending at least partially in contact; The support of the second disc structure can be connected to an external ablation signal source to discharge to the tissue. The support of the second disc structure and the ablation unit are used to transmit pulse ablation energy of different polarities.

2. The electrosurgical device of claim 1, wherein, The contact portions of the two contact segments of the contact portion extend in parallel.

3. The electrosurgical device of claim 2, wherein, The two contact segments of the contact portion intersect, and the other portion extends in parallel.

4. The electrosurgical device of claim 2, wherein, The contact portion of the two contact segments of the contact part is either straight or arc-shaped.

5. The electrosurgical device of claim 1, wherein, The contact portions of the two contact segments of the contact part are woven and extended.

6. The electrosurgical device of claim 5, wherein, The contact portion of the two contact segments of the contact part is either straight or arc-shaped.

7. The electroablation device according to claim 1, wherein, The ends of the two contact segments of the contact portion that are furthest from the surrounding portion are each connected to the power supply terminal.

8. The electroablation device according to claim 1, wherein, At least one of the two contact segments of the contact portion is connected to one end of each of the two contact segments away from the surrounding portion; the contact portion is connected to the power supply terminal via the end of the two contact segments connected.

9. The electroablation device according to any one of claims 1 to 8, wherein, The surrounding portion includes at least one intermediate section, with the head and tail ends of each intermediate section arranged sequentially around the support body; wherein, the head and tail ends of each intermediate section are respectively connected to the contact section, and the contact sections connected to adjacent head and tail ends extend in contact at least partially, and the two contact sections connected to adjacent head and tail ends together define the contact portion.

10. The electroablation device according to claim 9, wherein, One of the surrounding portions includes a middle section, and the two contact segments of the contact portion are respectively connected to the head end and the tail end of the same middle section.

11. The electroablation device according to claim 9, wherein, One of the surrounding portions includes a plurality of the intermediate segments, and the two contact segments of the contact portion are respectively connected to the head end of one of the intermediate segments and the adjacent tail end of the other intermediate segment.

12. The electroablation device according to claim 11, wherein, The lengths of the multiple intermediate segments belonging to one of the surrounding portions are all equal along the circumferential direction of the support.

13. The electroablation device according to any one of claims 1 to 8, wherein, The support structure includes multiple interconnected support rods, with mesh areas formed between the support rods.

14. The electroablation device according to claim 13, wherein, The multiple support rods in the support body are made of conductive material, and the outer periphery of the contact portion of the two contact segments of the contact part is provided with an insulating layer.

15. The electroablation device according to claim 14, wherein, At least one section of the contact portion of the two contact segments extends in the mesh area.

16. The electroablation device according to claim 13, wherein, The outer periphery of the support rod is covered with an insulating layer; wherein, the contact portions of the two contact segments of the contact part are arranged along the support rod, and the insulating layer also covers the contact portions of the two contact segments.

17. The electroablation device according to any one of claims 1 to 8, wherein, At least one section of the surrounding portion is either straight or curved.

18. The electroablation device according to any one of claims 1 to 8, wherein, The surrounding portion protrudes radially along the support.

19. The electroablation device according to any one of claims 1 to 8, wherein, The ablation unit is an electrode wire or a strip-shaped electrode sheet.

20. The electroablation device according to claim 19, wherein, The ablation unit comprises multiple strands of electrode wires arranged in a bundle.

21. The electroablation device according to claim 20, wherein, The multiple strands of electrode wires arranged in bundles are interwoven with each other.

22. The electroablation device according to any one of claims 1 to 8, wherein: The power supply terminal includes an inner sleeve and an outer sleeve. The outer sleeve is fitted around the periphery of the inner sleeve. The head section and the tail section both extend into and are fixed in the gap between the inner sleeve and the outer sleeve; or The power supply terminal includes a lower fixing part and an upper fixing part. The upper fixing part is disposed on the top of the lower fixing part, and the head section and the tail section both extend into and are fixed in the gap between the lower fixing part and the upper fixing part.

23. The electroablation device according to claim 22, wherein, Both the head section and the tail section are connected to the power supply end by spot welding.

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