CN116407262A

CN116407262A - Electric ablation device

Info

Publication number: CN116407262A
Application number: CN202111675315.2A
Authority: CN
Inventors: 王坤; 陈杰; 陈芷欣; 尤岩; 李建民
Original assignee: Hangzhou Dinova EP Technology Co Ltd
Current assignee: Hangzhou Dinova EP Technology Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2023-07-11

Abstract

The invention provides an electric ablation device, which comprises a support body, a feed end and at least one ablation unit, wherein the support body is provided with a plurality of feeding ends; 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 sections of contact sections, one end of each section of contact section is connected with the surrounding part, the other end of at least one section of contact section is connected with the feed end, and the two sections of contact sections at least partially contact and extend. Through the design, the invention can realize larger contact area by utilizing the contact arrangement of the two sections of contact sections of the contact part, and improve the stability of electric connection, so that the two sections of contact sections simultaneously flow the same current, the electric potential of the contact positions of the two sections of contact sections is ensured to be equal, the generation of potential difference is avoided, and the possibility of generating electric sparks by the ablation unit is reduced.

Description

Electric ablation device

Technical Field

The invention relates to the technical field of medical appliances, in particular to an electric ablation device.

Background

Pulse ablation is an ablation mode in which multiple high-voltage electric pulses act on a phospholipid bilayer in a short time, so that a transmembrane potential is formed, and cells form irreversible penetrating damage. The frequency of the high voltage electric pulse is 500Hz-30MHz, and the voltage range is hundreds of volts to tens of thousands of volts.

In the process of ablating target tissues by using high-voltage electricity by the ablation device, if the contact area of the connection point position of the high-voltage electricity transmission line is smaller, poor contact is easily generated, so that local potential difference is larger, a strong electric field is generated around the poor contact position, the dissociation degree of liquid molecules is increased, the conductivity of a strong field area is improved, and a large number of bubbles are generated; bubbles accumulated near the connection position of the high-voltage line are easily broken down by high-voltage electricity to form an electric spark. Such an electric spark is prone to eschar formation in the body and even causes heart perforation leading to pericardial effusion.

Disclosure of Invention

It is therefore a primary object of the present invention to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide an electrical ablation device with improved electrical connection and less prone to electrical sparks.

In order to achieve the above purpose, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided an electrical ablation device comprising a support body, a feed 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 supporting body; each contact part comprises two sections of contact sections, one end of each section of contact section is connected with the surrounding part, the other end of at least one section of contact section is connected with the feed end, and the two sections of contact sections at least partially contact and extend.

As can be seen from the above technical solutions, the electric ablation device provided by the present invention has the following advantages and positive effects:

each ablation unit of the electrical ablation device provided by the invention comprises a surrounding part and at least one contact part. The surrounding part is arranged at the periphery of the supporting body. Each contact part comprises two sections of contact sections, one end of each section of contact section is connected with the surrounding part, the other end of each section of contact section is connected with the feed end, and at least part of each section of contact section extends in a contact way. Through the design, the invention can realize larger contact area by utilizing the contact arrangement of the two sections of contact sections of the contact part, and improve the stability of electric connection, so that the two sections of contact sections simultaneously flow the same current, the electric potential of the contact positions of the two sections of contact sections is ensured to be equal, the generation of potential difference is avoided, and the possibility of generating electric sparks by the ablation unit is reduced.

Drawings

Various objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the invention, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

FIG. 1 is a schematic diagram of an electrical ablation device according to an exemplary embodiment;

FIG. 2 is a schematic view of a portion of the structure of the electrical ablation device shown in FIG. 1 in a top view;

fig. 3 to 7 are schematic diagrams of partial structures of an electric ablation device in a top view, respectively, according to another exemplary embodiment;

fig. 8 is a schematic perspective view of a part of the structure of an electric ablation device according to another exemplary embodiment;

FIG. 9 is a schematic structural view of an electrical ablation device shown in accordance with another exemplary embodiment;

FIG. 10 is a schematic structural view of an electrical ablation device shown in accordance with another exemplary embodiment;

FIG. 11 is a top view of the electrical ablation device shown in FIG. 10;

FIG. 12 is a schematic view of a configuration of an electrical ablation device shown in accordance with another exemplary embodiment;

fig. 13 is a schematic structural view of an electrical ablation device according to another exemplary embodiment.

The reference numerals are explained as follows:

100. a support body;

200. a feed end;

210. an inner sleeve body;

220. a jacket body;

300. an ablation unit;

310. a surrounding portion;

311. an intermediate section;

320. a contact portion;

321. a contact section;

410. 510 a first disc structure;

411. 511 supporting rods;

420. 520, a second disk surface structure;

610. a delivery catheter;

620. a pulling rod;

621. and (3) a bracket.

Detailed Description

Exemplary embodiments that embody features and advantages of the present invention are described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the invention, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the invention.

Referring to fig. 1, a schematic diagram of an electrical ablation device in an exemplary embodiment of the present invention is representatively illustrated. In this exemplary embodiment, the electrical ablation device proposed by the present invention is described as applied to an occluder or an ablation catheter. Those skilled in the art will readily appreciate that numerous modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below for use in other types of medical devices having ablation capabilities, which changes remain within the principles of the electrical ablation device set forth herein.

As shown in fig. 1, in an embodiment of the present invention, the electrical ablation device is a left atrial appendage occlusion ablation device for occlusion and pulse ablation of the left atrial appendage. The electrical ablation device includes a support body, a feed end 200, and an ablation unit 300. Referring to fig. 2 in conjunction therewith, a simplified schematic diagram of a portion of the structure of an electrical ablation device embodying principles of the present invention is representatively illustrated in fig. 2, in which feed end 200 and ablation unit 300 are illustrated in particular, and arrows in fig. 2 illustrate the flow of electrical current in particular. The feeding terminal 200 is used for electrically connecting the pulse generator and transmitting the pulse ablation power outputted by the pulse generator to the ablation unit 300. The ablation unit 300 is used for pulse ablation of tissue with the pulse ablation power provided by the feeding end 200. The structure, connection and functional relationship of the main components of the electric ablation device according to the present invention will be described in detail with reference to the above drawings.

As shown in fig. 1 and 2, in an embodiment of the present invention, the ablation unit 300 includes a surrounding portion 310 and a contact portion 320, wherein the surrounding portion 310 is disposed at the periphery of the support body. The contact portion 320 includes two contact sections 321, wherein one end of each of the two contact sections 321 is connected to the surrounding portion 310, the other end of each of the two contact sections 321 is connected to the feeding end 200, and the two contact sections 321 at least partially extend in contact. Through the design, the invention can realize larger contact area by utilizing the contact arrangement of the two sections of the contact sections 321 of the contact part 320, and promote the stability of electric connection, so that the two sections of the contact sections 321 simultaneously flow the same current, thereby ensuring the equal potential of the contact positions of the two sections of the contact sections 321, avoiding the generation of potential difference, and reducing the possibility of generating electric sparks by the ablation unit.

As shown in fig. 2, in an embodiment of the present invention, the contact portions of the two contact sections 321 of the same contact portion 320 extend in parallel.

As shown in fig. 2, based on the design that the contact portions of the two contact sections 321 extend in parallel, in an embodiment of the present invention, the two contact sections 321 of the same contact portion 320 do not intersect after extending from the surrounding portion 310, and directly extend in parallel.

As shown in fig. 2, in an embodiment of the present invention, two contact sections 321 are connected to the feeding terminals 200 after being extended for one section. In some embodiments, after the two contact sections 321 are in contact with and extend for one section, only one of the contact sections 321 may be connected to the feeding terminal 200, which is not limited to this embodiment.

In one embodiment of the present invention, the contact section 321 may be connected to the feeding terminal 200 by spot welding.

In an embodiment of the present invention, the ablation unit 300 may be a wire electrode. Accordingly, the diameter of the surrounding portion 310 is relatively small, and the flexibility is relatively high, so that the mechanical performance of the electric ablation device is less affected, and loading and releasing of the electric ablation device are facilitated. In some embodiments, the ablation unit 300 may also be a strip electrode plate, which is not limited to the present embodiment.

Based on the design of the ablation unit 300 as a wire electrode, in an embodiment of the present invention, the ablation unit 300 may also be a plurality of wire electrodes arranged in a bundle. Accordingly, the plurality of strands of wires arranged in a bundle have better flexibility than the single wire having a larger wire diameter, thereby facilitating loading and release of the electrical ablation device and avoiding the ablation unit 300 from being broken by excessive radial deformation during loading and release. A larger ablation current may be allowed to pass relative to a single wire diameter electrode wire, with the likelihood of the ablation unit 300 blowing out due to excessive flow during ablation.

Based on the ablation unit 300 being a bundle of multiple wire electrodes, in one embodiment of the invention, the bundle of multiple wire electrodes are braided, e.g. hinged, to each other. Therefore, the invention adopts the design of braiding the multi-strand electrode wires, which can further improve the flexibility, and in addition, the ablation energy is concentrated, and the ablation depth and the ablation effect are ensured. After the electric ablation device is attached to target tissue, different electrode wires in the ablation unit 300 are bent towards different directions, so that larger gaps are formed between the different electrode wires, ablation energy is dispersed, the ablation depth is smaller, and the situation that the ablation effect is poor occurs.

As shown in fig. 1, in an embodiment of the present invention, the surrounding portion 310 may be disposed at the circumference of the outermost ring of the support body 100.

In an embodiment of the present invention, the surrounding portion 310 may be fixed to the support 100 by an adhesive manner. In some embodiments, the surrounding portion 310 may be fixed to the support 100 by other methods, such as welding, sewing, etc.

In one embodiment of the present invention, the support body 100 includes a plurality of support bars connected to each other, and a mesh region is formed between the plurality of support bars.

Based on the design that the support body 100 includes a plurality of support bars, the plurality of support bars in the support body 100 are made of a conductive material in one embodiment of the present invention, and the outer circumference of the contact portion of the two contact sections 321 of the contact portion 320 may be provided with an insulating layer.

Further, at least one section of the contact portion of the two-stage contact section 321 extends in a mesh area formed between the plurality of support bars, thereby reducing the proportion of the contact section 321 arranged along the support bars, avoiding the occurrence of a phenomenon in which the contact section 321 is electrically coupled to the support bars, resulting in the support bars being electrically conductive.

Through the design, the insulating layer can play a mechanical fixing role on the contact part of the two-section contact section 321, so that the contact strength of the two-section contact section 321 is improved, the stability of electric connection is ensured, and electric spark is avoided. In addition, since the surrounding portion 310 of the ablation unit 300 is close to the tissue and is a portion that is easy to ablate the tissue, and the contact portion of the two contact sections 321 only plays a role of a wire, and does not need to ablate the tissue, the insulation layer is used for performing insulation treatment on the outer surface of the contact portion of the two contact sections 321, so that the contact portion can be prevented from discharging to the tissue or body fluid, electric energy is consumed, ablation energy is concentrated in the middle section, the ablation depth of the surrounding portion 310 is improved, and an annular ablation zone is formed.

In an embodiment of the present invention, such as the embodiment shown in fig. 13, the outer circumference of the support rod may be coated with an insulating layer. On this basis, the contact portions of the two contact sections 321 of the contact portion 320 may be disposed along the support bar, and the insulation layer coated on the outer circumference of the support bar further coats the contact portions of the two contact sections.

In an embodiment of the present invention, the insulating layer covering the contact sections 321 may be an insulating film, such as a heat shrink film, so as to achieve mutual insulation between the adjacent contact sections 321 and the support rods. In some embodiments, the insulating layer may also be a coated insulating material coating, or an insulating sleeve that is placed around the outer perimeter of the contact section 321.

As shown in fig. 1, in an embodiment of the present invention, the support body 100 may be a support skeleton. The supporting framework can be a supporting body which is made by a braiding process or a cutting process and is provided with hollowed-out grids. The supporting framework can be made of a metal material or a nonmetal material with better biocompatibility. In some embodiments, the support 100 may also be a balloon or the like.

The electric ablation device comprises a disk surface structure which is a first disk surface structure and is provided with a supporting body 100, wherein the first disk surface structure comprises a sealing part arranged at a proximal end and an anchoring part arranged at a distal end, and the sealing part and the anchoring part are mutually connected and integrally formed. The sealing part is used for plugging the left auricle part, and the anchoring part is used for anchoring the left auricle internal tissue. In the embodiment shown in fig. 1, the feeding end 200 is disposed at the proximal end of the support body 100, it being understood that in other embodiments, the feeding end is disposed at the distal end of the support body 100, or between the proximal and distal ends of the support body 100.

In an embodiment of the present invention, the material of the feeding end 200 may be stainless steel. In some embodiments, the feeding end 200 may be made of other metal materials, such as copper (Cu), silver (Ag), gold (Au), nickel-titanium alloy, or the like.

In an embodiment of the present invention, the electrical ablation device according to the present invention may comprise two ablation units 300 of different polarity, wherein the two ablation units 300 are used for delivering the same or different pulse ablation energy, such as for delivering pulse ablation energy of different polarity. A distance is maintained between the two ablation units 300.

Referring to fig. 3, a schematic diagram of a portion of the structure of an electrical ablation device according to another exemplary embodiment of the present invention is representatively illustrated in a top view, wherein the feeding port 200 and the ablation unit 300 are specifically illustrated.

As shown in fig. 3, based on the design that two contact sections 321 of the same contact portion 320 are at least partially extended in parallel, in an embodiment of the present invention, a part of the two contact sections 321 intersect and another part is extended in parallel.

As shown in fig. 2 and 3, based on the design that two contact sections 321 of the same contact portion 320 are at least partially extended in parallel, in an embodiment of the present invention, both contact sections 321 may be linear, so that the contact portion 320 is linear as a whole. In some embodiments, the contact section 321 may also have an arc shape, such as a corrugated shape, etc., and the contact section 321 may also have other shapes, such as a zigzag shape, etc., such that the contact portion 320 is generally zigzag or arc-shaped.

Referring to fig. 4, a schematic diagram of a portion of the structure of an electrical ablation device according to another exemplary embodiment of the present invention is representatively illustrated in a top view, wherein the feeding port 200 and the ablation unit 300 are specifically illustrated.

As shown in fig. 4, in one embodiment of the present invention, two contact sections 321 of the same contact portion 320 are at least partially in the form of a braid. The braiding may be in the form of a twist of the illustrated hinge, or in other braiding forms. In addition, the portion of the two contact sections 321 that are woven together may be generally linear or arcuate (e.g., corrugated), or may be shaped in other ways, such as zigzags, etc.

As shown in fig. 4, based on the design that the two contact sections 321 of the same contact portion 320 are at least partially woven in contact extension, in an embodiment of the present invention, both contact sections 321 may be arc-shaped, such as corrugated. In some embodiments, the two contact sections 321 of the same contact portion 320 may also have a zigzag shape or other shapes that can be woven, which is not limited to this embodiment.

In an embodiment of the present invention, the middle section 311 of the surrounding portion 310 may be n wires, and each contact section 321 may be n wires, so that the contact portion is formed by hinging 2n wires to each other, preferably, the middle section 311 may be formed by hinging n wires to each other, and n is a positive integer greater than or equal to 2. Referring to fig. 5, a schematic diagram of a portion of the structure of an electrical ablation device according to another exemplary embodiment of the invention is representatively illustrated in a top view, wherein the feeding end 200 and the ablation unit 300 are specifically illustrated.

As shown in fig. 5, based on the design that the two contact sections 321 of the same contact portion 320 are at least partially extended in parallel, in an embodiment of the present invention, each end of the two contact sections 321 of at least one contact portion 320, which is far from the surrounding portion 310, is connected. On the basis of this, the contact 320 is connected to the feeding terminal 200 via one end of the two contact sections 321.

As shown in fig. 1 to 5, in some embodiments of the present invention, the electric ablation device is provided with only one ablation unit 300, thereby advantageously reducing the number of connection points on the electric pulse transmission line, reducing the complexity of the high voltage pulse transmission line, reducing the spark generation, and reducing the size of the delivery sheath.

In some embodiments of the present invention, the surrounding portion 310 includes at least one middle section 311, and the head and tail ends of each middle section 311 of the surrounding portion 310 are sequentially disposed to surround the support body 100 for one turn. On this basis, the head end and the tail end of each middle section 311 are respectively connected with a contact section 321, the contact sections 321 respectively connected with the adjacent head end and tail end extend at least partially in contact, and the two contact sections 321 respectively connected with the adjacent head end and tail end jointly define a contact part 320.

In the embodiment shown in fig. 2 to 5, the surrounding portion 310 includes only one intermediate section 311. In some embodiments, the surrounding portion 310 may also include at least two intermediate sections 311. Alternatively, when the electrical ablation device includes at least two ablation units 300, there may be at least one surrounding portion 310 of the ablation units 300 including one middle section 311, and at least one surrounding portion 310 of the ablation units 300 including at least two middle sections 311, or each surrounding portion 310 of the ablation units 300 may include only one middle section 311, and may include at least two middle sections 311, and the number of middle sections 311 of the surrounding portion 310 included in each ablation unit 300 may be the same or may be different.

As shown in fig. 1 and 2, based on the design that the surrounding portion 310 includes at least one middle section 311, in an embodiment of the present invention, one surrounding portion 310 includes one middle section 311, whereby two contact sections 321 of the same contact portion 320 are connected to a head end and a tail end of the same middle section 311, respectively.

Referring to fig. 6, a schematic diagram of a portion of the structure of an electrical ablation device according to another exemplary embodiment of the invention is representatively illustrated in a top view, wherein the feeding end 200 and the ablation unit 300 are specifically illustrated.

In one embodiment of the invention, as shown in fig. 6, one surrounding portion 310 includes two intermediate sections 311. Specifically, the two middle sections 311 of the surrounding portion 310 are sequentially arranged at the head and tail ends to surround the support body by one circumference, that is, the head end of one middle section 311 corresponds to the tail end of the middle section 311 of the other surrounding portion 310. On the basis of this, the contact section 321 connected to the head end of one intermediate section 311 is at least partially in contact with and connected to the feed end 200, with the contact section 321 connected to the adjacent tail end of the other intermediate section 311. Through the design, the invention can lead the electric field to be more uniform. Specifically, the plurality of middle sections 311 of one surrounding portion 310 are simultaneously fed at the feeding end 200 through each contact portion 320, the currents flowing through the middle sections 311 are equal in magnitude, the lengths of the middle sections 311 surrounding the supporting body are identical, the electric charges are identical, the current densities are identical, and the electric field distribution around the different middle sections 311 is substantially identical.

As shown in fig. 6, based on the design that the surrounding portion 310 of one ablation unit 300 includes two middle sections 311, in an embodiment of the present invention, the lengths of the two middle sections 311 along the circumferential direction of the support body may be approximately equal, in other words, the radians corresponding to the extending paths of the two middle sections 311 along the circumferential direction of the support body are approximately equal, and the sum of the radians is 360 °, that is, the two middle sections 311 are symmetrically and uniformly arranged along the circumferential direction of the support body. Taking the embodiment shown in fig. 6 as an example, the radians of the two intermediate sections 311 are each approximately one half of 360 °, i.e. 180 °.

In some embodiments, the entire ablation unit 300 is made of one strand of wire, one strand of wire constituting the ablation unit 300 forms a plurality of intermediate sections, and a plurality of contacts, i.e., one strand of wire extends toward the feeding end 200 and contacts the feeding end 200 a plurality of times. Wherein a strand of wire electrode comprises at least one wire electrode.

Referring to fig. 7, a simplified schematic diagram of a portion of the structure of another exemplary embodiment of the electrical ablation device of the present invention is representatively illustrated in a top view, wherein the feeding end 200 and the ablation unit 300 are specifically illustrated.

As shown in fig. 7, in an embodiment of the present invention, the surrounding portion 310 of one ablation unit 300 includes four middle segments 311. Specifically, the head and tail ends of the four intermediate sections 311 are sequentially arranged to surround the support body by one turn, that is, the head end of any one intermediate section 311 corresponds to the tail end of the adjacent other intermediate section 311. On the basis of this, the contact section 321 connected to the head end of one intermediate section 311 is at least partially in contact with and connected to the feed end 200, with the contact section 321 connected to the adjacent tail end of the other intermediate section 311.

As shown in fig. 7, based on the design that the surrounding portion 310 of one ablation unit 300 includes four middle sections 311, in an embodiment of the present invention, the lengths of the four middle sections 311 along the circumferential direction of the support body may be substantially equal, in other words, the radians corresponding to the extending paths of the four middle sections 311 along the circumferential direction of the support body are substantially equal, and the sum of the radians is 360 °, that is, the four middle sections 311 are symmetrically and uniformly arranged along the circumferential direction of the support body. Taking the embodiment shown in fig. 7 as an example, the four intermediate sections 311 each have an arc of approximately one quarter of 360 °, i.e. 90 °. Wherein, when the two contact sections 321 of the contact portion 320 are not connected at the ends far from the surrounding portion 310, the ablation unit 300 including the plurality of intermediate sections 311 may be composed of a plurality of strands of wire electrodes, one of which can constitute one intermediate section 311 and two contact sections 321. When the two contact sections 321 of the contact portion 320 are connected away from each end of the surrounding portion 310, the ablation unit 300 including the plurality of intermediate sections 311 may be constituted by one strand of electrode wire.

It should be noted that, unlike the embodiments shown in fig. 2 to 5, in the embodiments shown in fig. 6 and 7, the surrounding portion 310 of one ablation unit 300 of the electrical ablation device may include at least two intermediate sections 311. In some embodiments, one ablation unit 300 may also include at least two surrounds 310, such as two, three, four, five, etc. Further, the intermediate sections 311 of the surrounding portion of one ablation unit 300 may be uniformly arranged, and this structure makes the electric potential difference of the intermediate sections 311 distributed around the circumference of the support body small, so as to facilitate forming a uniform and sufficiently strong electric field with other ablation units or other members for ablating tissue.

Furthermore, when the electrical ablation device comprises at least two ablation units 300, the number of intermediate sections 311 of the surrounding portion 310 of each ablation unit 300 may or may not be the same, for example, there may be at least one surrounding portion 310 of each ablation unit 300 comprising one intermediate section 311 and at least one surrounding portion 310 of each ablation unit 300 comprising at least two intermediate sections 311, or the surrounding portion 310 of each ablation unit 300 may or may not comprise only one intermediate section 311, and may or may not comprise at least two intermediate sections 311. In addition, when the surrounding portion 310 of one ablation unit 300 includes at least two intermediate sections 311, for any intermediate section 311, it may be connected to the feeding terminal 200 through two contact sections 321 connected to the head end and the tail end thereof, respectively, or may be connected to the feeding terminal 200 through only one of the two contact sections 321 connected to the head end and the tail end thereof.

As shown in fig. 6 and 7, when the electric ablation device includes at least two ablation units 300, based on the design that the surrounding portion 310 includes at least one middle section 311, in an embodiment of the present invention, the surrounding portion 310 of one ablation unit 300 includes a plurality of middle sections 311, and two contact sections 321 of the contact portion 320 are connected to a head end of one middle section 311 and an adjacent tail end of the other middle section 311, respectively.

In addition, similar to the embodiment shown in fig. 4, in the embodiments shown in fig. 6 and 7, adjacent ones each extend in contact with the form of a weave. In some embodiments, when the surrounding portion 310 of one ablation unit 300 includes at least two middle sections 311, two sections 321 of the same contact portion 320 may also adopt other forms of contact extension, for example, but not limited to, the form of parallel contact extension shown in fig. 2 or 3.

As described above, in various possible embodiments of the design concept of the electrical ablation device according to the present invention, the surrounding portion 310 of each ablation unit 300 includes at least one middle section 311 disposed on the supporting body, the head and tail ends of the middle sections 311 of the same surrounding portion 310 are sequentially disposed to surround the supporting body, and two contact sections 321 of the same contact portion 320 are respectively adjacent to the two contact sections 321 of the adjacent head and tail ends and are connected to the feeding end 200. In addition, the electrical ablation 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.

It should be noted that, in order to more clearly show the form of the two-stage contact section 321 of the contact portion 320, the structures shown in fig. 2 to 7 are structures in which a gap is added between the two-stage contact section 321 that is at least partially parallel or woven. It should be understood that in the specific embodiment of the present application, the two contact sections 321 of the contact portion 320 are at least one section that is contacted together in parallel, or are woven together, that is, the two contact sections 321 are at least partially contacted, which is described herein.

Referring to fig. 8, a schematic perspective view of a part of the structure of an electric ablation device according to another exemplary embodiment of the present invention is representatively illustrated, in which a feeding terminal 200 and an ablation unit 300 are specifically illustrated.

As shown in fig. 8, in an embodiment of the present invention, a connection section may be connected to an end of at least one contact section 321 remote from the middle section 311, whereby the contact section 321 can be connected to the feeding terminal 200 via the connection section. In some embodiments, the contact section 321 may also be directly connected to the feeding end 200 via an end remote from the middle section 311. In addition, the portions of the two contact sections 321 of the same contact portion 320 that connect to the power feeding terminal 200 may be the same or may be different, for example, but not limited to, including an end portion remote from the middle section 311 or a connection section connected to the end portion.

As shown in fig. 8, in an embodiment of the present invention, the feeding terminal 200 may include an inner case 210 and an outer case 220. Specifically, the outer sleeve 220 is sleeved on the outer periphery of the inner sleeve 210, so that a gap is formed between the outer sleeve 220 and the inner sleeve 210, and on this basis, two sections of contact sections 321 of the same contact portion 320 extend into and are fixed at the gap. Further, when the contact section 321 is connected with a connection section, the contact section 321 may extend into and be fixed at the gap specifically through the connection section. Accordingly, the contact section 321 of the contact portion 320 can be firmly and firmly fixed at the gap of the feeding end 200, and has good conductivity, so that other adverse conditions such as short circuit caused by poor contact of the contact portion 320 can be avoided. In addition, the contact section 321 of the contact portion 320 and the feeding terminal 200 may be fixedly connected by, but not limited to, spot welding. In some embodiments, the feeding end 200 may also have other structures, for example, the feeding end 200 may also include a lower fixing portion and an upper fixing portion, such as a threaded structure, disposed on top of the lower fixing portion, so that two contact sections 321 of the same contact portion 320 extend into and are fixed at a gap between the lower fixing portion and the upper fixing portion.

Referring to fig. 9, a schematic structural view of an electrical ablation device in accordance with the present invention is representatively illustrated in another exemplary embodiment.

As shown in fig. 9, unlike the embodiment shown in fig. 1, when the orthographic projection of at least one section of the surrounding portion 310 on the plane parallel to the axial direction of the support body 100 is in a straight line shape, and the surrounding portion 310 is in a straight line shape as a whole, that is, in a design of a substantially regular ring-shaped structure, in an embodiment of the present invention, the orthographic projection of at least one section of the surrounding portion 310 on the plane parallel to the axial direction of the support body 100 may also be in a zigzag shape, and the zigzag-shaped surrounding portion 310 is specifically bent along the axial direction of the support body to form a zigzag-like structure, and the surrounding portion 310 still maintains the form of being circumferentially arranged around the support body. With the above design, the present invention can facilitate loading and releasing of the electric ablation device by the zigzag surrounding portion 310. In some embodiments, the front projection of the surrounding portion 310 on a plane parallel to the axial direction of the support body 100 may also have other shapes, such as a wave shape. In addition, the surrounding portion 310 may also partially protrude along the radial direction of the support body, so that each middle section 311 forms a garland shape surrounding the support body, and the "petals" of the garland protrude along the radial direction of the support body.

Referring to fig. 10 and 11, a schematic structural view of an electrical ablation device according to another exemplary embodiment of the present invention is representatively illustrated in fig. 10; a top view of the electrical ablation device shown in fig. 10 is representatively illustrated in fig. 11.

As shown in fig. 10 and 11, in an embodiment of the present invention, the electrical ablation device proposed in the present invention may be a left atrial appendage occlusion ablation device, which includes two disk surface structures, namely a first disk surface structure 410 and a second disk surface structure 420, and the first disk surface structure 410 and the second disk surface structure 420 may be an anchor disk and a sealing disk of the occluder, respectively, as an example. The anchoring disc is used for contacting and anchoring to the inner wall tissue of the left auricle, and the sealing disc is used for plugging the mouth of the left auricle.

Each disc surface structure is provided with a supporting body, and the ablation unit 300 is arranged on the supporting body of one disc surface structure. Specifically, the ablation unit 300 is disposed on a support of the first disc structure 410. In some embodiments, the plurality of ablation units 300 are disposed on the support of the first disc surface structure 410, or when the electrical ablation device includes the first disc surface structure 410 and the second disc surface structure 420, the ablation units 300 may also be disposed on the support of the second disc surface structure 420, or the electrical ablation device may also be disposed on the support of the first disc surface structure 410 and the support of the second disc surface structure 420, respectively. Furthermore, the electrical ablation device provided by the invention can also only comprise one disk surface structure, or can comprise three or more disk surface structures, so that the support body of at least one disk surface structure of the electrical ablation device is provided with a plurality of ablation units 300, and the specific shape, the manufacturing process and the connection relation between the disk surface structures of each disk surface structure are not limited by the embodiment.

As shown in fig. 10 and 11, in an embodiment of the present invention, the distal end of the first disc structure 410 has a plurality of support rods 411 arranged at intervals, and the end of any support rod 411 is connected to the end of an adjacent support rod 411.

As shown in fig. 10, in an embodiment of the present invention, the second disk surface structure 420 may have a substantially frustum-shaped structure. In some embodiments, the second disk surface structure 420 may also have other structures, such as a disk structure, but not limited to the above.

Referring to fig. 12, a schematic view of the structure of an electrical ablation device according to another exemplary embodiment of the present invention is representatively illustrated in fig. 12.

As shown in fig. 12, unlike the design in which the end of any support bar 411 of the first disc structure 410 is connected to the end of the adjacent support bar 411 in the embodiment shown in fig. 10, in an embodiment of the present invention, the ends of the plurality of support bars 511 spaced apart from the distal end of the first disc structure 510 are respectively independently arranged without connection.

As shown in fig. 12, in an embodiment of the present invention, the second disk surface structure 520 may have a substantially conical structure.

As shown in fig. 10 or 12, in some embodiments of the present invention, when the electrical ablation device includes a plurality of disc surface structures, at least one of the disc surface structures may be provided without the ablation unit 300, and on the basis of this, a support body of the disc surface structure without the ablation unit 300 may be connected to an external ablation signal source to be able to discharge to the tissue, thereby serving as electrical ablation. For example, the ablation unit 300 may be provided on the first

disc surface structure

410, 510, the support body of the second

disc surface structure

420, 520 is at least partly made of an electrically conductive material, and the support body 100 made of an electrically conductive material is partly used for electrically connecting an external ablation signal source for electrical ablation, whereby a design of the occluder with two ablation portions is achieved. It will be appreciated that in the embodiment shown in fig. 1, the first disc structure includes a support body 100, the support body 100 being made at least in part of an electrically conductive material, and the support body 100 made of an electrically conductive material being used in part to ablate tissue. In some embodiments of fig. 1, 10 and 12, a delivery device for delivering an electrical ablation device into a patient, or an ablation member for ablating tissue is provided outside the patient, for delivering the same or different ablation energy, such as for delivering pulsed ablation electrical energy of different polarity, than the ablation unit 300.

Referring to fig. 13, a schematic view of the structure of an electrical ablation device according to another exemplary embodiment of the present invention is representatively illustrated in fig. 13.

As shown in fig. 13, in an embodiment of the present invention, the electrical ablation device may only include a disk surface structure, and the electrical ablation device is taken as an example of an ablation catheter, and the ablation catheter may be used for ablation of tissues such as pulmonary veins, renal arteries, and the like. The disk surface structure in the electro-ablation device may be a support 621 of the ablation catheter. Wherein the ablation catheter includes a delivery catheter 610 and a pull rod 620. Specifically, the pull rod 620 is disposed within the delivery catheter 610 and is retractable from the distal end of the delivery catheter 610. The support 621 of the ablation catheter may be disposed at the outer circumference of the pull rod 620, and the feeding end (not shown) may be disposed at the proximal end of the pull rod 620 or in the delivery catheter 610.

As shown in fig. 13, in an embodiment of the present invention, the support body 621 includes a plurality of support rods disposed around an axial direction thereof, and at least one support rod may be coated with an insulating layer, such as an insulating sleeve, at an outer circumference thereof. On this basis, the surrounding portion 310 surrounds along the circumference of the support body 621, and at least one contact portion penetrates an insulating sleeve on the surface thereof on at least one support bar and is led back to the feeding end.

In one embodiment of the invention, the electrical ablation device includes at least a first disc structure, at least a portion of the support in the first disc structure being capable of conducting electricity and ablating tissue. On this basis, the ablation unit 300 is disposed on the first disc surface structure, or other disc surface structures disposed in the electric ablation device, taking the embodiment shown in fig. 10 and 12 as an example, the ablation unit 300 is disposed on the first

disc surface structures

410 and 510, and the second

disc surface structures

420 and 520 are not provided with ablation units, in some embodiments, the second

disc surface structures

420 and 520 may also be provided with ablation units, or other ablation components for ablating tissue, such as other forms of electrode members, point-like electrodes, ring-like electrodes, rod-like electrodes, and the like, or at least part of the supports in the disc surface can be electrically conductive and serve as ablation components for ablating tissue, but not limited thereto. In some embodiments, the first disc structure 410 may be provided with a plurality of ablation units 300, or an ablation assembly as described above may be further provided on the basis of the ablation units 300.

It should be noted herein that the electrical ablation devices shown in the drawings and described in this specification are but a few examples of the wide variety of electrical ablation devices that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details or any of the components of the electrical ablation device shown in the drawings or described in this specification.

In summary, each ablation unit of the electrical ablation device according to the present invention includes a surrounding portion and at least one contact portion. The surrounding part is arranged at the periphery of the supporting body. Each contact part comprises two sections of contact sections, one end of each section of contact section is connected with the surrounding part, the other end of each section of contact section is connected with the feed end, and at least part of each section of contact section extends in a contact way. Through the design, the invention can realize larger contact area by utilizing the contact arrangement of the two sections of contact sections of the contact part, and improve the stability of electric connection, so that the two sections of contact sections simultaneously flow the same current, the electric potential of the contact positions of the two sections of contact sections is ensured to be equal, the generation of potential difference is avoided, and the possibility of generating electric sparks by the ablation unit is reduced.

Exemplary embodiments of the electrical ablation device proposed by the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. An electrical ablation device comprising:

a support body and a feed end; and

at least one ablation unit, each of the ablation units comprising:

the surrounding part is arranged at the periphery of the support body; a kind of electronic device with high-pressure air-conditioning system

And each contact part comprises two sections of contact sections, one end of each of the two sections of contact sections is connected with the surrounding part, the other end of at least one of the two sections of contact sections is connected with the feed end, and the two sections of contact sections at least partially extend in a contact mode.

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

3. The electrical ablation device of claim 2, wherein a portion of the two contact segments of the contact portion intersect and another portion extends in parallel.

4. The electrical ablation device of claim 2, wherein the contact portion of the two contact segments of the contact portion is linear or arcuate.

5. The electrical ablation device of claim 1, wherein a contact portion of the two contact segments of the contact portion is braided to extend.

6. The electrical ablation device of claim 5, wherein the contact portion of the two contact segments of the contact portion is linear or arcuate.

7. The electrical ablation device of claim 1, wherein each end of the two contact segments of the contact portion remote from the surrounding portion is connected to the feed end.

8. The electrical ablation device of claim 1, wherein each end of the two contact segments of at least one of the contact portions remote from the surrounding portion is connected; the contact portion is connected to the feeding end via one end of the two contact sections connected.

9. The electrical ablation device according to any one of claims 1-8, wherein the surrounding portion includes at least one intermediate section, and each of the intermediate sections of the surrounding portion has a head end and a tail end arranged in sequence to surround the support body for one revolution; the head end and the tail end of each intermediate section are respectively connected with the contact sections, the contact sections respectively connected with the adjacent head end and tail end at least partially extend in contact, and the two sections of the contact sections respectively connected with the adjacent head end and tail end jointly define the contact part.

10. The electrical ablation device of claim 9, wherein one of said encircling portions includes one of said intermediate sections, said two contact sections of said contact portion being connected to a leading end and a trailing end of the same intermediate section, respectively.

11. The electrical ablation device of claim 9, wherein one of said surrounding portions includes a plurality of said intermediate sections, said two contact sections of said contact portion being connected to a leading end of one of said intermediate sections and an adjacent trailing end of the other of said intermediate sections, respectively.

12. The electric ablation device according to claim 11, wherein lengths of the plurality of intermediate sections belonging to one of the surrounding portions in the circumferential direction of the support body are all equal.

13. The electrical ablation device according to any one of claims 1 to 8, wherein the support body comprises a plurality of support rods connected to each other with mesh areas formed therebetween.

14. The electrical ablation device of claim 13, wherein a plurality of support rods in the support body are made of an electrically conductive material, and an outer periphery of a contact portion of the two-stage contact section of the contact portion is provided with an insulating layer.

15. The electrical ablation device of claim 14, wherein at least one section of the contact portion of the two-segment contact segment extends in the mesh region.

16. The electrical ablation device of claim 13, wherein the outer circumference of the support rod is coated with an insulating layer; the contact parts of the two sections of contact sections of the contact part are arranged along the support rod, and the insulating layer also covers the contact parts of the two sections of contact sections.

17. The electrical ablation device according to any one of claims 1-8, wherein at least one section of the surround is linear or curvilinear.

18. The electrical ablation device according to any one of claims 1-8, wherein the surrounding portion protrudes in a radial direction of the support body.

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

20. The electrical ablation device of claim 19, wherein the ablation unit comprises a plurality of strands of wire electrode arranged in a bundle.

21. The electrical ablation device of claim 20, wherein the plurality of wires in a bundled arrangement are interwoven.

22. The electrical ablation device of any one of claims 1-8, wherein:

the feed end comprises an inner sleeve body and an outer sleeve body, the outer sleeve body is sleeved on the periphery of the inner sleeve body, and the head section and the tail section extend into and are fixed at a gap between the inner sleeve body and the outer sleeve body; or alternatively

The feed end comprises a lower fixing portion and an upper fixing portion, the upper fixing portion is arranged at the top of the lower fixing portion, and the head section and the tail section extend into and are fixed at a gap between the lower fixing portion and the upper fixing portion.

23. The electrical ablation device of claim 22, wherein the head section and the tail end are each connected to the feed end by spot welding.

24. The electrical ablation device of any one of claims 1-8, wherein the electrical ablation device comprises at least one disc surface structure having the support, the ablation unit being disposed on the support of at least one of the disc surface structures.

25. The electrical ablation device of claim 24, wherein the electrical ablation device comprises a first disk surface structure and a second disk surface structure; wherein:

the support body of the first disc surface structure is provided with the ablation unit; and/or

The support body of the second disc surface structure is provided with the ablation unit.

26. The electrical ablation device of claim 24, wherein the electrical ablation device comprises a first disc structure, at least a portion of the support in the first disc structure being capable of conducting electricity and ablating tissue; wherein the ablation unit is arranged on the first disc surface structure or other disc surface structures in the electric ablation device.