Ablation apparatus and ablation system

Abstract

The present application relates to an ablation apparatus, comprising a support structure, a wire and a plurality of electrodes. The electrodes are sleeved on the support structure, the wire comprises exposed portions, and the exposed portions are located between the electrodes and the support structure and are at least partially in contact with the inner walls of the electrodes. Therefore, by providing the electrodes on the support structure, the support structure can press the electrodes against tissue to be ablated; and then by providing the exposed portions on the wire, and locating the exposed portions between the electrodes and the support structure, the exposed portions are at least partially in contact with the inner walls of the electrodes, so that the inner walls of the electrodes are all in contact with a conductive layer of the wire. Compared with a mode in the prior art that only one or two ends of each electrode are connected to the wire, the conductive area between the electrodes and the wire is increased, facilitating current transmission and increasing the heating rate of the electrodes, thereby reducing the ablation time and the pain of a patient.

Description

Ablation devices and ablation systems Technical Field

[0001] The present application relates to the field of medical devices, and in particular to an ablation device and an ablation system. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] In the prior art, an ablation device usually requires an electrode to be provided, and the electrode is mounted on an electrode support structure, and the electrodes are connected to each other via wires. However, the conductive efficiency of the electrode is low, resulting in a low heating rate of the electrode.

[0004] Application Contents

[0005] The present application provides an ablation device, comprising a support structure, a wire and a plurality of electrodes, wherein the electrodes are arranged on the support structure, the wire comprises an exposed portion, and the exposed portion is located between the electrode and the support structure and at least partially adheres to the inner wall of the electrode.

[0006] According to one embodiment of the present application, the support structure includes multiple support rods, which are arranged around the axis of the support structure. The wire is at least partially in contact with the inner wall of the support rod and passes through the support rod to connect with the electrode.

[0007] According to one embodiment of the present application, the electrode includes a plurality of connected coil units, and the coil units are wound on the supporting structure; the exposed portion is inserted into the coil units and fits against the inner wall of the coil units.

[0008] According to one embodiment of the present application, the support structure includes a plurality of support units, which are arranged along the circumference of the support structure. The electrodes are arranged on the support units, and the wires are located inside the support units.

[0009] According to one embodiment of the present application, the electrode includes a first electrode and a second electrode connected in series, the support unit includes a first support unit, the first electrode and the second electrode are located on the first support unit, and the exposed portion is located in the first electrode or the second electrode.

[0010] According to one embodiment of the present application, the electrode also includes a third electrode and a fourth electrode connected in series, the support unit includes a second support unit, the third electrode and the fourth electrode are located on the second support unit, the third electrode or the fourth electrode is connected in parallel with the first electrode or the second electrode, and the second support unit is circumferentially adjacent to or circumferentially spaced apart from the first support unit.

[0011] According to one embodiment of the present application, the electrode includes a first electrode and a second electrode connected in series, the first electrode and the second electrode are respectively located on two adjacent support units, the exposed portion includes a first exposed portion and a second exposed portion, the first exposed portion is located in the first electrode, and the second exposed portion is located in the second electrode.

[0012] According to one embodiment of the present application, the support unit includes a bending portion, the bending portion is located at the circumferential center of the support unit, and at least two of the electrodes are respectively located on both sides of the bending portion.

[0013] According to one embodiment of the present application, the two electrodes located on both sides of the bending portion are spaced apart from the bending portion at different distances in the circumferential direction.

[0014] According to one embodiment of the present application, the support structure includes a wall-adhering rod, the support rod includes a deformable arm, the deformable arm is connected to the wall-adhering rod, the electrode is connected to the wall-adhering rod, the support rod is provided with a first wire threading hole, the first wire threading hole is located on the proximal side of the deformable arm, the first wire threading hole is spaced apart from the deformable arm, and the wire passes through the first wire threading hole and is connected to the electrode.

[0015] According to one embodiment of the present application, a second wire threading hole and a third wire threading hole are provided on the support rod, the second wire threading hole is located on the proximal side of the first wire threading hole, and the third wire threading hole is located on the proximal side of the second wire threading hole. The wire passes through the third wire threading hole, the second wire threading hole and the first wire threading hole in sequence from the radial inner side of the support structure to be connected to the electrode, and the aperture of the first wire threading hole is larger than the aperture of the second wire threading hole or the aperture of the third wire threading hole.

[0016] According to one embodiment of the present application, the side wall of the second threading hole is provided with an opening connected to the second threading hole, and the opening passes through the side wall of the support rod along the thickness direction of the support structure.

[0017] According to one embodiment of the present application, the two ends of the wall-adhering rod are respectively connected to the two circumferentially adjacent support rods, and the two adjacent wall-adhering rods are spaced apart. The support rod includes a first deformation arm and a second deformation arm, the first deformation arm is connected to one wall-adhering rod, and the second deformation arm is connected to the other wall-adhering rod, and the first threading hole is spaced apart from the first deformation arm or the second deformation arm.

[0018] According to one embodiment of the present application, a winding groove is provided on the support rod, and the winding groove includes a plurality of groove units. The plurality of groove units are arranged at intervals along the length direction of the support rod, and the wire passes through the groove units and the first wire threading hole in sequence to connect with the electrode.

[0019] According to one embodiment of the present application, it further includes a first tubular member, which is covered on the side wall of the support rod, and the tubular member extends from the proximal end of the support member to the proximal edge of the first threading hole.

[0020] According to one embodiment of the present application, a pushing member is further included, wherein the proximal end of the support structure is connected to the distal end of the pushing member, a cavity is opened in the pushing member, the wire is passed through the cavity and at least part of it passes through the distal end of the pushing member.

[0021] According to one embodiment of the present application, it further includes a pushing member and a second tubular member, wherein the second tubular member is covered on the distal end portion of the pushing member.

[0022] According to one embodiment of the present application, the ablation device also includes a cooling component, which is located radially inward of the support structure. A first cavity and a second cavity are opened in the pushing member, the wire is passed through the first cavity, and the second cavity is connected to the cooling component.

[0023] The present application also provides an ablation system, comprising the ablation device of the above embodiment, and a delivery device, wherein the delivery device is suitable for loading the ablation device.

[0024] According to one embodiment of the present application, the delivery device further includes a handle, the handle includes a shell, a winding post is provided in the shell, the proximal end of the wire of the ablation device enters the shell through the distal end of the shell and is wound on the winding post.

[0025] Compared with the prior art, the ablation device of the present application has the following beneficial effects: the electrode is arranged on the support structure, so that the support structure can press the electrode against the tissue to be ablated, and the wire includes an exposed portion, and the exposed portion is located between the electrode and the support structure, so that the exposed portion is at least partially in contact with the inner wall of the electrode, so that the inner wall of the electrode is in contact with the conductive layer of the wire. Compared with the prior art method in which only one or both ends of the electrode are connected to the wire, the conductive area of ​​the electrode and the wire is increased, which facilitates the transfer of current and increases the heating rate of the electrode, thereby reducing the ablation time and reducing the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of an ablation device in Example 1 of the present application;

[0027] FIG2 is an enlarged schematic diagram of the structure at point A in FIG1 of the present application;

[0028] FIG3 is a schematic cross-sectional view of the electrodes and wires in Example 1 of the present application;

[0029] FIG4 is another schematic diagram of the structure of the electrode in Example 1 of the present application;

[0030] FIG5 is a schematic diagram of the arrangement of the electrode assembly in Example 1 of the present application;

[0031] FIG6 is a schematic diagram of the arrangement of the electrode assembly in Example 2 of the present application;

[0032] FIG7 is an enlarged schematic diagram of the structure at point B in FIG6 of the present application;

[0033] FIG8 is a schematic structural diagram of a bending portion in Example 2 of the present application;

[0034] FIG9 is an enlarged schematic diagram of the structure at point C in FIG8 of the present application;

[0035] FIG10 is a schematic structural diagram of the ablation device in Example 2 of the present application;

[0036] FIG11 is a schematic structural diagram of a pushing member in Example 2 of the present application;

[0037] FIG12 is a schematic structural diagram of the ablation system in Example 3 of the present application;

[0038] FIG13 is an exploded schematic diagram of the handle in the third embodiment of the present application.

[0039] FIG14 is a schematic structural diagram of an ablation device in Example 4 of the present application;

[0040] FIG15 is a schematic diagram of the arrangement of wires in the fourth embodiment of the present application;

[0041] FIG16 is a schematic diagram of the support structure in Example 4 of the present application;

[0042] FIG17 is a schematic structural diagram of the first threading hole in the fourth embodiment of the present application;

[0043] FIG18 is an enlarged schematic diagram of the structure at point A in FIG14 of the present application;

[0044] FIG19 is a schematic structural diagram of the second threading hole in the fourth embodiment of the present application;

[0045] FIG20 is a schematic structural diagram of a wire duct in a fourth embodiment of the present application;

[0046] FIG21 is a schematic structural diagram of the first tubular member in Example 5 of the present application;

[0047] FIG22 is a schematic structural diagram of a winding slot in the fifth embodiment of the present application;

[0048] FIG23 is a schematic structural diagram of the second tubular member in the fifth embodiment of the present application;

[0049] 100. Ablation device;

[0050] 110. Support structure; 111. Support unit; 1111. Wall-adhering rod; 1112. Support rod; 1113. First support unit; 1114. Second support unit; 112. Pushing member;

[0051] 120, electrode assembly; 121, electrode; 122, coil unit; 123, first coil unit; 124, second coil unit; 125, first electrode assembly; 125a, first electrode; 125b, first electrode; 126, second electrode assembly; 126a, third electrode; 126b, fourth electrode;

[0052] 130, wire; 131, conductive layer; 132, insulating layer; 133, exposed portion; 134, main body; 135, first wire; 136, second wire;

[0053] e1, radial inner edge; e2, radial outer edge;

[0054] 200. Ablation device;

[0055] 210, support structure; 211, support unit; 2113, first support unit; 2113a, first support rod; 2113b, second support rod; 2113c, first wall-adhering rod; 2114, second support unit; 2114b, third support rod; 2115, third support unit; 212, pusher; 2121, first cavity; 2122, second cavity; 213, bending portion; 2131, first bending arm; 2132, second bending arm Folding arm; 220, electrode assembly; 225, first electrode assembly; 225a, first electrode; 225b, second electrode; 226, second electrode assembly; 226a, third electrode; 226b, fourth electrode; 227, fifth electrode; 228, sixth electrode; 230, wire; 235, first wire; 235a, first exposed portion; 235b, second exposed portion; 240, cooling assembly; 241, cooling balloon; 242, delivery tube;

[0056] l1, the distance between the fifth electrode and the center of the bending portion; l2, the distance between the sixth electrode and the center of the bending portion.

[0057] 30. Ablation system;

[0058] 300, delivery device; 310, sheath; 320, handle; 321, housing; 3211, slide rail; 3212, fixing structure; 3212a, fixing hole; 3213, winding post; 323, reinforcement structure;

[0059] 400, ablation device;

[0060] 410, support structure; 411, support rod; 4111, first support rod; 4111a, first deformable arm; 4111b, second deformable arm; 4111c, first main body; 4112, second support rod; 4112a, third deformable arm; 4112b, fourth deformable arm; 4112c, second main body; 4113, main body; 4113a, first threading hole; 4113b, second threading hole; 4113c, third threading hole; 4113d, opening; 4113e, wire trough; 4114, connecting section; 412, wall-attached rod; 413, winding trough; 4131, trough unit; 420, electrode; 430, pusher; 440, wire; 451, first tubular member; 452, second tubular member; DETAILED DESCRIPTION

[0061] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar modifications without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0063] Example 1

[0064] An embodiment of the present application provides an ablation device 100, which is used to generate ablation energy at the tissue to be ablated in the human body. The ablation energy can ablate the nerves in the tissue, thereby achieving the effect of treating the diseased part of the human body. The ablation device 100 can be used for ablation of the airway, heart, aorta, stomach, etc. For example, in this embodiment, by delivering the ablation device 100 into the airway, the ablation device 100 then ablates the nerves on the airway tissue, thereby reducing the thickness of the airway wall to alleviate airway obstruction.

[0065] As shown in Figure 1, the ablation device 100 includes a support structure 110 and an electrode assembly 120. The distal end of the support structure 110 is annular in structure. There are multiple electrode assemblies 120, and the multiple electrode assemblies 120 are connected to the distal end of the support structure 110 and are arranged along the circumference of the support structure 110. The support structure 110 is used to support the electrode assembly 120. After being released, the support structure 110 can be unfolded to push the electrode assembly 120 to fit the tissue to be ablated. The wire is connected to the electrode assembly 120, and the wire is used to transmit current to the electrode assembly 120 so that the electrode assembly 120 forms an ablation field. The radiofrequency ablation field is used to ablate nerves in the diseased tissue to block the transmission of nerve signals.

[0066] As shown in FIG1 , the support structure 110 includes a plurality of support units 111 and a pusher 112. The plurality of support units 111 are arranged along the circumference of the support structure 110, and the proximal ends of the support units 111 are connected to the pusher 112. The support units 111 include a wall-adhering rod 1111 and at least two support rods 1112. The two support rods 1112 are arranged around the axis of the support structure 110. The plurality of support rods 1112 are arranged at intervals along the circumference of the support structure 110, one end of each support rod 1112 is connected to the pusher 112, and the other end of each support rod 1112 is connected to the wall-adhering rod 1111. The ends of the wall-adhering rod 1111 are respectively connected to two circumferentially adjacent support rods 1112. The plurality of wall-adhering rods 1111 are arranged along the circumference of the support structure 110 so that the distal end of the support structure 110 forms an annular structure. The support structure 110 includes a first end close to the distal end and a second end close to the proximal end. The diameter of the first end of the support structure 110 is larger than the diameter of the second end of the support structure 110 . The support rod 1112 is tilted relative to the axial direction of the pushing member 112 .

[0067] As shown in FIG1 , ablation device 100 includes an electrode assembly 120, which includes multiple electrodes 121. Electrodes 121 are disposed on an adherent rod 1111. Electrodes 121 may be sleeved onto the adherent rod 1111 or sutured or bonded to the adherent rod 1111. Multiple electrodes 121 are arranged along the circumference of support structure 110. Electrodes 121 may be strip-shaped, tubular, or ring-shaped. Electrodes 121 may be formed from one or more materials such as gold, tungsten, or copper.

[0068] As shown in Figures 2 and 3, the wire 130 includes a conductive layer 131 and an insulating layer 132, and the insulating layer 132 is arranged to cover the outer wall of the conductive layer 131. The wire 130 includes an exposed portion 133 and a main portion 134, and the exposed portion 133 and the main portion 134 are connected. The exposed portion 133 refers to the portion of the conductive layer 131 where the insulating layer 132 is not provided, so that the conductive layer 131 is exposed to the exposed portion 130. The exposed portion 133 is located between the electrode 121 and the wall-attached rod 1111, and the exposed portion 133 is in contact with the inner wall of the electrode 121. The main portion 134 refers to the portion of the conductive layer 131 where the insulating layer 132 is provided on the outside. One end of the wire 130 is electrically connected to an external power supply. The conductive layer 131 can be made of one or more materials such as copper, aluminum, silver or gold. The inner wall of the electrode 121 can be fully or partially in contact with the exposed portion 133.

[0069] During operation of ablation device 100, a power source delivers current to wire 130, which then flows through exposed portion 133 and into electrode 121. When energized, electrode 121 forms an ablation field, achieving ablation of the target area. After ablation is complete, the power source is disconnected from wire 130, causing electrode 121 to cease emitting the ablation field and thus terminating ablation.

[0070] In this way, the electrode 121 is arranged on the support structure 110, so that the support structure 110 can press the electrode 121 against the tissue to be ablated, and then the wire 130 includes an exposed portion 133, and the exposed portion 133 is located between the electrode 121 and the support structure 110, so that the exposed portion 133 is at least partially in contact with the inner wall of the electrode 121, so that the inner wall of the electrode 121 is in contact with the conductive layer 131 of the wire 130. Compared with the method in the prior art where only one end or both ends of the electrode 121 are connected to the wire 130, the conductive area of ​​the electrode 121 and the wire 130 is increased, which facilitates the transfer of current and increases the heating rate of the electrode 121, thereby reducing the ablation time and reducing the patient's pain.

[0071] As shown in Figures 2 and 3, the electrode 121 includes a plurality of connected coil units 122. The plurality of coil units 122 are arranged along the length of the electrode 121. The plurality of coil units 122 are connected to form a spiral structure. All coil units 122 are arranged around the wall-adhering rod 1111. The coil units 122 are wound around the wall-adhering rod 1111. Two adjacent coil units 122 can be aligned or spaced apart. The exposed portion 133 is provided within the coil unit 122, and the exposed portion 133 is aligned with the inner wall of the coil unit 122. The coil unit 122 fixes the wire 130 to the wall-adhering rod 1111.

[0072] In this way, the electrode 121 includes multiple connected coil units 122, and the multiple coil units 122 are wound on the wall-attached rod 1111. The exposed portion 133 is passed through the coil unit 122, so that the exposed portion 133 can fit with each coil unit 122, so that the wire 130 can transmit current to the electrode 121, thereby facilitating the transmission of current and thereby increasing the heating rate of the electrode 121.

[0073] As shown in Figure 4, the radial inner edges of two adjacent coil units 122 are aligned, and the radial outer edges of two adjacent coil units 122 are at least partially spaced apart. The coil units 122 include a radial inner edge e1 and a radial outer edge e2. The two adjacent coil units 122 include a first coil unit 123 and a second coil unit 124, and the first coil unit 123 and the second coil unit 124 are connected. The radial inner edges e1 of the first coil unit 123 and the second coil unit 124 are aligned. The radial outer edges e2 of the first coil unit 123 and the second coil unit 124 are spaced apart, and the radial outer edges e2 of the first coil unit 123 and the second coil unit 124 are spaced apart. The ablation device 100 also includes a cooling assembly, which is located radially inward of the support structure 110 and is used to spray cooling liquid onto the electrode 121 to cool the electrode 121.

[0074] Thus, by affixing the radial inner edges e1 of two adjacent coil units 122, the inner edges of all coil units 122 form a complete annular surface, thereby ensuring the contact area between the coil units 122 and the wire 130. This facilitates the transmission of current from the wire 130 to the electrode 121, thereby facilitating the current transfer and increasing the heating rate of the electrode 121. By at least partially spacing the radial outer edges e2 of two adjacent coil units 122, a certain gap is created between the radial outer edges of the two adjacent coil units 122, allowing the coolant to contact the tissue to be ablated through this gap, thereby improving cooling efficiency.

[0075] As shown in Figure 5, the electrode assembly 120 includes a first electrode assembly 125 and a second electrode assembly 126, the support unit 111 includes a first support unit 1113 and a second support unit 1114, the first electrode assembly 125 is arranged on the first support unit 1113, the second electrode assembly 126 is arranged on the second support unit 1114, the first electrode assembly 125 and the second electrode assembly 126 are connected in parallel, the wire 130 includes a first wire 135 and a second wire 136, the first wire 135 is connected to the first electrode assembly 125, the second wire 136 is connected to the second electrode assembly 126, and the first wire 135 and the second wire 136 are connected in parallel.

[0076] The first electrode assembly 125 includes a first electrode 125a and a first electrode 125b connected in series. The first electrodes 125a and 125b are located on the first support unit 1113 and are spaced apart along the circumference of the support structure 110. The exposed portion 133 of the first conductive wire 135 may be located only within the first electrode 125a or only within the first electrode 125b. Alternatively, the first conductive wire 135 may have two exposed portions 133, one located within the first electrode 125a and one located within the first electrode 125b.

[0077] The second electrode assembly 126 includes a third electrode 126a and a fourth electrode 126b connected in series. The third electrode 126a and the fourth electrode 126b are located on the first support unit 1113 and are spaced apart along the circumference of the support structure 110. The exposed portion 133 of the second conductive wire 136 can be located only within the third electrode 126a or only within the fourth electrode 126b. Alternatively, the second conductive wire 136 may have two exposed portions 133, one located within the third electrode 126a and the other located within the fourth electrode 126b.

[0078] The first support unit 1113 and the second support unit 1114 are arranged adjacent to each other in the circumferential direction or spaced apart in the circumferential direction. It should be noted that the support structure 110 includes a plurality of support units 111, and the plurality of support units 111 are arranged in an array along the circumference of the support structure 110. The first support unit 1113 and the second support unit 1114 being adjacent to each other in the circumferential direction means that there are no other support units 111 between the first support unit 1113 and the second support unit 1114. It is understood that the first support unit 1113 and the second support unit 1114 being spaced apart in the circumferential direction means that the first support unit 1113 and the second support unit 1114 are not adjacent to each other in the circumferential direction, and there are other support units 111 between the first support unit 1113 and the second support unit 1114. For example, in one embodiment, the support structure 110 further includes a third support unit, and the third support unit is located between the first support unit 1113 and the second support unit 1114.

[0079] In this way, by connecting the first electrode assembly 125 and the second electrode assembly 126 in parallel, the first electrode assembly 125 is arranged on the first support unit 1113, and the second electrode assembly 126 is arranged on the second support unit 1114, so that the current of the electrode assemblies 120 on the first support unit 1113 and the second support unit 1114 can be adjusted separately, thereby facilitating the control of the ablation temperature in different areas.

[0080] Example 2

[0081] The difference between this embodiment and the first embodiment is that, as shown in Figures 6 and 7, the first electrode assembly 225 includes a first electrode 225a and a second electrode 225b connected in series, the first electrode 225a is located on the first support unit 2113, and the second electrode 225b is located on the second support unit 2114, and the wire 230 includes a first wire 235, the first wire 235 is located between the first support unit 2113 and the second support unit 2114, and the first wire 235 is connected to the first electrode 225a and the second electrode 225b.

[0082] In one embodiment, the first support unit 2113 includes a first support rod 2113a, a second support rod 2113b, and a first adherent rod 2113c. The first adherent rod 2113c is connected to the first support rod 2113a and the second support rod at both ends. The second support unit 2114 includes a second support rod 2113b, a third support rod 2114b, and a second adherent rod 2114c. The second adherent rod 2114c is connected to the second support rod 2113b and the third support rod 2114b at both ends. A first electrode 225a is connected to the first adherent rod 2113c, and the first electrode 225a is located at the end of the first adherent rod 2113c near the second support rod 2113b. A second electrode 225b is connected to the second adherent rod 2114c, and the second electrode 225b is located at the end of the second adherent rod 2114c near the second support rod 2113b. The first conductive wire 235 extends along the inner wall of the second support rod 2113b and is connected to the first electrode 225a and the second electrode 225b, respectively. The first conductive wire 235 includes a first exposed portion 235a and a second exposed portion 235b. The first exposed portion 235a bends toward the first electrode 225a and conforms to the inner wall of the first electrode 225a. The second exposed portion 235b bends toward the second electrode 225b and conforms to the inner wall of the first electrode 225a.

[0083] In this way, by locating the first electrode 225a on the first support unit 2113 and the second electrode 225b on the second support unit 2114, the first electrode 225a and the second electrode 225b do not need to be distributed at both ends of the same support unit 211. During the process of the support unit 211 being loaded by the sheath, the wall-attached rod needs to be bent and retracted. By locating the first electrode 225a and the second electrode 225b at both ends of the same support unit 211, the wire 230 does not need to cross the center of the wall-attached rod, thereby avoiding damage to the insulation layer caused by being bent by the wall-attached rod.

[0084] The second electrode assembly 226 includes a third electrode 226a and a fourth electrode 226b connected in series, the third electrode 226a is located on the second support unit 2114, the third electrode 226a and the second electrode 225b are respectively located on both sides of the circumference of the second support unit 2114, the fourth electrode 226b is located on the third support unit 2115, the third support unit 2115 is located on the side of the second support unit 2114 away from the first support unit 2113, and the fourth electrode 226b is adjacent to the third electrode 226a.

[0085] As shown in Figures 6 and 7, the first electrode assembly 225 and the second electrode assembly 226 are staggered along the circumference of the support structure 210. The second electrode assembly 226 is located between two adjacent first electrode assemblies 225. The first electrode assembly 225 is located between two adjacent second electrode assemblies 226. Specifically, in one embodiment, the first electrode assembly 225 includes a first electrode assembly a and a first electrode assembly b, and the second electrode assembly 226 includes a second electrode assembly a and a second electrode assembly b. The first electrode assembly a, the first electrode assembly b, the second electrode assembly a, and the second electrode assembly b are circumferentially spaced apart. The second electrode assembly a is located between the first electrode assembly a and the first electrode assembly b, the second electrode assembly b is located between the first electrode assembly a and the first electrode assembly b, and the second electrode assembly a and the second electrode assembly b are located on both radial sides of the support structure 210.

[0086] As shown in FIG8 , the support unit 211 includes a bending portion 213 located at the distal center of the support unit 211, with at least two electrodes located on either side of the bending portion 213. The bending portion 213 is located on the wall-adhering rod, preferably at the center of the wall-adhering rod. The bending portion 213 includes a first bending arm 2131 and a second bending arm 2132. One end of the first bending arm 2131 and the second bending arm 2132 are connected to form an angle, with the opening of the angle formed by the first bending arm 2131 and the second bending arm 2132 facing the proximal direction. During the sheath retraction process of the ablation device 200, the first bending arm 2131 and the second bending arm 2132 move toward each other under the squeezing action of the sheath, and the angle between the first bending arm 2131 and the second bending arm 2132 decreases, thereby achieving the retraction of the first bending arm 2131 and the second bending arm 2132. The two electrodes are respectively located on both sides of the bent portion 213 . The two electrodes may be two electrodes connected in series on the same electrode assembly 220 , or two electrodes connected in parallel on different electrode assemblies 220 .

[0087] Therefore, the support unit 211 includes a bending portion 213, and the bending portion 213 is located at the distal center of the support unit 211. The bending portion 213 is squeezed by the sheath and contracted, thereby facilitating the loading of the support unit 211 into the sheath. The two electrodes are respectively located on both sides of the bending portion 213, so that the two electrodes can perform ablation on both sides of the bending portion 213, thereby facilitating a complete circle of ablation in the circumferential direction.

[0088] As shown in FIG9 , the two electrodes located on either side of the bend 213 have different circumferential spacing from the bend 213. It should be noted that the two electrodes located on either side of the bend 213 are defined as the fifth electrode 227 and the sixth electrode 228. The spacing between the fifth electrode 227 and the center of the bend 213 is l1, and the spacing between the sixth electrode 228 and the center of the bend 213 is l2, where l1 > l2. It is understood that in other embodiments, the spacing between the fifth electrode 227 and the center of the bend 213 can be set to l1 < the spacing between the sixth electrode 228 and the center of the bend 213, or l2.

[0089] Therefore, by setting the two electrodes located on both sides of the bending portion 213 at different distances from the bending portion 213 in the circumferential direction, the stiffness of the first bending arm 2131 and the second bending arm 2132 located on both sides of the bending portion 213 at different circumferential positions has a certain difference. Therefore, in the process of sheathing the support unit 211 of the bending portion 213, the first bending arm 2131 and the second bending arm 2132 have a time difference in deformation, which facilitates the interlacing of different support units 211 to reduce loading stress.

[0090] As shown in Figures 10 and 11, the ablation device 200 also includes a pushing member 212. The proximal end of the support structure 210 is connected to the distal end of the pushing member 212. A cavity is opened in the pushing member 212. The wire 230 is passed through the cavity and at least partially passes through the distal end of the pushing member 212.

[0091] The ablation device 200 also includes a cooling component 240, which is located on the radial inner side of the support structure 210. A first cavity 2121 and a second cavity 2122 are provided in the pushing member 212. The first cavity 2121 and the second cavity 2122 are arranged along the axial direction of the pushing member 212. The wire 230 is passed through the first cavity 2121, and the second cavity 2122 is connected to the cooling component 240.

[0092] The cooling assembly 240 includes a cooling balloon 241 and a delivery pipe 242. The distal end of the cooling balloon 241 is closed, and the proximal end of the cooling balloon 241 is connected to and communicates with the delivery pipe 242. The cooling balloon 241 is located radially inward of the support structure 210. The sidewall of the cooling balloon 241 is provided with a spray hole. After the fluid enters the cooling balloon 241, it is sprayed out from the spray hole to cool the electrode assembly 220. One end of the delivery pipe 242 is connected to the cooling balloon 241, and the other end of the delivery pipe 242 passes through the second cavity 2122. It will be understood that in another embodiment, the cooling assembly 240 includes multiple cooling pipes, and the multiple cooling pipes are disposed within the second cavity 2122. The distal ends of the cooling pipes pass through the distal end of the second cavity 2122 and bend toward the radial outside of the support structure 210. The fluid is sprayed from the distal ends of the cooling pipes to cool the electrode assembly 220.

[0093] Example 3

[0094] The third embodiment of the present application provides an ablation system 30, as shown in FIG12 , including the ablation device 200 described above, and also including a delivery device 300, wherein the delivery device 300 includes a sheath 310 and a handle 320. The sheath 310 is suitable for loading the support structure 210, the distal end of the handle 320 is connected to the proximal end of the sheath 310, and the guide wire 230 passes through the sheath 310 and is connected to the handle 320. The pusher 212 is disposed in the sheath 310, and the support structure 210 can be accommodated in the sheath 310 to load the ablation device 200, or can be located on the distal side of the sheath 310 to release the ablation device 200.

[0095] As shown in FIG13 , the handle 320 includes a housing 321 and a slider 322. The housing 321 is provided with a slide rail 3211, which is arranged axially along the sheath 310. The slider 322 is disposed within the slide rail 3211 and is slidable within the slide rail 3211. The distal end of the slider 322 is connected to the sheath 310, and the slider 322 is configured to drive the sheath 310 toward the proximal end or toward the distal end. The slider 322 at least partially extends radially outward from the housing 321. A fixing structure 3212 is also provided within the housing 321. The fixing structure 3212 is provided with a fixing hole 3212a, into which the proximal end of the pusher 212 is disposed. A winding post 3213 is also provided within the housing 321, upon which the proximal end of the wire is wound.

[0096] Referring again to Figure 12 , handle 320 also includes a reinforcement structure 323 , which is connected to the proximal end of housing 321. A cavity is defined within reinforcement structure 323 . The distal end of the cavity is connected to the cooling assembly's pipes, while the proximal end is adapted to connect to a device providing a cooling medium. The diameter of reinforcement structure 323 is larger than the diameter of the cooling assembly's pipes. Reinforcement structure 323 serves to strengthen the connection between the cooling assembly's pipes and the device providing the cooling medium.

[0097] Example 4

[0098] As shown in Figures 14 and 15, the support structure 410 includes multiple support rods 411 and multiple wall-adhering rods 412. The multiple support rods 411 are arranged around the axis of the support structure 410 and are spaced apart along the circumference of the support structure 410. One end of the support rod 411 is connected to the pusher 430, and the other end of the support rod 411 is connected to the wall-adhering rod 412. The two ends of the wall-adhering rod 412 are respectively connected to two circumferentially adjacent support rods 411. The multiple wall-adhering rods 412 are arranged along the circumference of the support structure 410 to form an annular structure at the distal end of the support structure 410. The support structure 410 includes a first end near the distal end and a second end near the proximal end. The diameter of the first end of the support structure 410 is larger than the diameter of the second end of the support structure 410. The support rods 411 are arranged at an angle relative to the axial direction of the pusher 430.

[0099] The wire 440 is at least partially in contact with the inner wall of the support rod 411 and passes through the support rod 411 to connect to the electrode 420. The wire 440 is disposed within the pusher 430 and extends radially inwardly of the support structure 410. The wire 440 is in contact with the sidewall of the support rod 411 near the center of the support structure 410. The wire 440 extends along the inner sidewall of the support rod 411 near the center of the support structure 410 and connects to the electrode 420. The inner sidewall refers to the sidewall of the support rod 411 near the radial center.

[0100] During the loading process of ablation device 400, the sheath is pushed in the distal direction or the pushing member 430 is pulled in the proximal direction, causing the sheath to compress the support rod 411. The support rod 411 then drives the guide wire 440 toward the radial center of the support structure 410, thereby achieving loading of ablation device 400. During the release process of ablation device 400, the sheath is pulled in the proximal direction or the pushing member 430 is pushed in the distal direction, causing the support rod 411 to extend out of the distal side of the sheath. After the support rod 411 is freed from the restraint of the sheath, the support rod 411 drives the guide wire 440 to expand radially outward from the support structure 410, thereby achieving release of ablation device 400.

[0101] Thus, by arranging the electrode 420 on the support structure 410, the support structure 410 can press the electrode 420 against the tissue to be ablated, and by arranging multiple support rods 411 around the axis of the support rod 411, the support structure 410 is annular in structure to achieve annular ablation, and the wire 440 is fitted with the inner wall of the support rod 411 and passes through the support rod 411 to be connected to the electrode 420, so that most of the structure of the wire 440 is located on the inner wall of the support rod 411, so that the support rod 411 separates the wire 440 from the sheath, avoiding that most of the structure of the wire 440 is rubbed by the sheath and causing the insulation layer to be damaged.

[0102] As shown in Figures 16 and 17, the support rod 411 includes two deformable arms and a main body 4113. The proximal ends of the two deformable arms are connected to the distal end of the main body 4113, and the proximal end of the main body 4113 is connected to the pusher 430. The support rod 4111 includes a first support rod 4111 and a second support rod 4112, which are circumferentially adjacent to each other. The first support rod 4111 includes a first deformable arm 4111a, a second deformable arm 4111b, and a first main body 4111-4113c. The first and second deformable arms 4111a, 4111b are connected to the distal end of the first main body 4111-4113c, and are arranged at a predetermined angle with a gap between them. The proximal end of the first main body 4111-4113c is connected to the pusher 430. The second support rod 4112 includes a third deformable arm 4112a, a fourth deformable arm 4112b, and a second main body 4112-4113c. The proximal ends of the third and fourth deformable arms 4112a, 4112b are connected to the distal end of the second main body 4112-4113c. The third and fourth deformable arms 4112a, 4112b are arranged at a predetermined angle, with a gap between them. The proximal end of the second main body 4112-4113c is connected to the pushing member 430. The first and second main bodies 4111-4113c are spaced apart. The two ends of the wall-adhering rod 412 are connected to the second and third deformable arms 4111b, 4112a, respectively.

[0103] During the process of retracting the support structure 410 into the sheath, the first support rod 4111 and the second support rod 4112 are compressed by the sheath and move radially inward of the support structure 410, causing the first deformable arm 4111a and the second deformable arm 4111b to intersect, and the third deformable arm 4112a and the fourth deformable arm 4112b to intersect. Thus, by disposing the first deformable arm 4111a and the second deformable arm 4111b to intersect after retraction, the loading stress caused by the intertwining of the third deformable arm 4112a and the fourth deformable arm 4112b during the retraction process can be eliminated, thereby facilitating loading of the support structure 410.

[0104] As shown in Figure 17, the main body 4113 is provided with a first threading hole 4113a and a second threading hole 4113b. The first threading hole 4113a and the second threading hole 4113b are spaced apart, wherein the first threading hole 4113a is located proximal to the deformable arm, the first threading hole 4113a is spaced apart from the deformable arm, and the second threading hole 4113b is located proximal to the first threading hole 4113a. The wire 440 passes through the second wire hole 4113b and the first wire hole 4113a in sequence and is connected to the electrode 420. For example, in one embodiment, the wire 440 passes through the radial inner side of the pushing member 430, the wire 440 is attached to the inner wall of the support rod 411 and extends toward the distal end of the support structure 410, the wire 440 passes through the second wire hole 4113b from the inner wall of the support rod 411, and then extends from the radial outer side of the support rod 411 toward the first wire hole 4113a and passes through the first wire hole 4113a to enter the radial inner side of the support rod 411, and then bends toward the wall-attached rod 412 to connect with the electrode 420.

[0105] In this way, by opening the first threading hole 4113a and the second threading hole 4113b on the main body 4113, after the wire 440 passes through the first threading hole 4113a and the second threading hole 4113b, the first threading hole 4113a and the second threading hole 4113b can limit the wire 440, and then the first threading hole 4113a is located on the proximal side of the deformable arm, and the first threading hole 4113a is set close to the deformable arm, so that the wire 440 can be bent toward the wall rod 412 after passing through the first threading hole 4113a, reducing the possibility of the wire 440 being clamped between the two deformable arms during the process of being put into the sheath or released from the sheath, thereby avoiding the wire 440 from being damaged by the interlaced friction of the deformable arms, causing the insulation layer of the wire 440 to be damaged.

[0106] The spacing distance between the first threading hole 4113a and the second threading hole 4113b is defined as <0.5mm. It should be noted that there is a certain spacing distance between the first threading hole 4113a and the second threading hole 4113b, and this spacing distance is used to provide a bending space for the wire 440 to thread the wire. However, the spacing distance between the first threading hole 4113a and the second threading hole 4113b cannot be too large. When the spacing distance between the first threading hole 4113a and the second threading hole 4113b is too large, it is easy to cause the wire 440 to float between the first threading hole 4113a and the second threading hole 4113b during the sheathing process, increasing the probability that the insulation layer of the wire 440 is damaged by friction from the sheath. Therefore, by setting the spacing distance between the first threading hole 4113a and the second threading hole 4113b to be less than 0.5mm, it is possible to provide a certain threading and bending space for the wire 440 while preventing the distance between the first threading hole 4113a and the second threading hole 4113b from being too large to cause the wire 440 to float.

[0107] As shown in Figure 17, the through-hole area of ​​the first threading hole 4113a is larger than the through-hole area of ​​the second threading hole 4113b. The through-hole of the first threading hole 4113a extends toward the distal direction. The circumferential width of the first threading hole 4113a gradually decreases from the end close to the proximal end toward the end close to the distal end. The first threading hole 4113a has a long strip-shaped structure, and the wire 440 can slide toward the distal direction in the first threading hole 4113a. During the process of loading the support structure 410 into the sheath, the support rod 411 moves toward the radial center of the support structure 410, and the wall rod 412 is closed by the pulling action of the support rod 411. The middle position of the wall rod 412 extends toward the distal direction, and the wall rod 412 drives the wire 440 to extend toward the distal direction.

[0108] Therefore, in the process of the wall-adhering rod 412 driving the electrode 420 to move toward the distal direction, the through hole through the first threading hole 4113a extends toward the distal direction, so that the wire 440 in the first threading hole 4113a can follow the electrode 420 to move toward the distal direction, thereby allowing the wire 440 to adapt to the displacement of the wire 440 toward the movement direction after the wall-adhering rod 412 is closed and the electrode 420 drives the wire 440 to move.

[0109] As shown in Figure 18, a third threading hole 4113c is provided on the main body 4113, and the third threading hole 4113c is located on the proximal side of the second threading hole 4113b. The third threading hole 4113c is arranged close to the pushing member 430. The wire 440 passes through the third threading hole 4113c, the second threading hole 4113b and the first threading hole 4113a in sequence to be connected to the electrode 420. The circumferential width of the first threading hole 4113a is greater than the circumferential width of the second threading hole 4113b or the circumferential width of the first threading hole 4113a.

[0110] In this embodiment, the wire 440 passes through the third threading hole 4113c from the radial outer side of the support rod 411 and enters the support rod 411. The wire 440 extends toward the distal end along the inner wall of the support rod 411. The wire 440 passes through the second threading hole 4113b and exits the radial outer side of the support rod 411, and then passes through the third threading hole 4113c from the radial outer side of the support rod 411 into the support rod 411. Thus, by opening a third threading hole 4113c on the connecting section 4114, the third threading hole 4113c and the second threading hole 4113b cooperate to limit the wire 440 to the radial inner wall of the support rod 411, so that most of the wires 440 can be close to the inner wall of the main body 4113. On the one hand, during the sheathing process, it can avoid the wires 440 on different support rods 411 from being entangled with each other, causing difficulty in unfolding the support structure 410. On the other hand, it can also avoid the wires 440 from being scratched by the sheath tube and causing damage to the insulation layer on the wire 440

[0111] As shown in Figure 19, the main body 4113 further has an opening 4113d that communicates with the second threading hole 4113b and extends through the thickness of the main body 4113. Thus, the main body 4113 has an opening 4113d that allows the wire 440 to enter the second threading hole 4113b through the opening 4113d, thereby facilitating the wire 440 to pass through the second threading hole 4113b.

[0112] As shown in FIG20 , in other embodiments, the inner wall of the main body 4113 may further include a wire groove 4113e extending from the proximal end of the main body 4113 to the second wire threading hole 4113b. The wire is at least partially accommodated within the wire groove 4113e. The wire passes through the third wire threading hole 4113c and enters the wire groove 4113e, then extends from the wire groove 4113e to the second wire threading hole 4113b. Thus, the wire can be accommodated within the wire groove 4113e, reducing the loading volume of the support structure 410.

[0113] Example 5

[0114] The difference between this embodiment and the fourth embodiment is that, as shown in FIG21 , the ablation device 400 further includes a first tubular member 451. The first tubular member 451 covers the sidewall of the support rod 411 and extends from the proximal end of the support rod 411 to the proximal edge of the first threading hole a. The guidewire 440 is passed through the first tubular member 451. The first tubular member 451 is a heat shrink tubing or PTFE tubing. The interior of the first tubular member 451 forms a cavity with two open ends. The first tubular member 451 is sleeved onto the support rod 411, and the guidewire 440 is positioned between the first tubular member 451 and the support rod 411. The first tubular member 451 is used to press the guidewire 440 against the support rod 411. The first tubular member 451 has a certain degree of flexibility and can bend under stress to accommodate deformation of the support rod 411. The first tubular member 451 and the support rod 411 can be bonded, sutured, or interference fit. It should be noted that the suture connection refers to the first tubular member 451 being fixed to the support rod 411 via sutures. An interference fit refers to the inner diameter of the first tubular member 451 being smaller than the outer diameter of the support rod 411. After the first tubular member 451 is sleeved on the support rod 411, a large static friction force exists between the support rod 411 and the first tubular member 451. Thus, by sleeved on the support rod 411, the wire 440 is located between the first tubular member 451 and the support rod 411, so that the first tubular member 451 can include the wire 440 to form a protective layer on the outside of the wire 440, preventing the wire 440 from being damaged by friction with the sheath during the sheathing process of the support structure 410.

[0115] As shown in Figure 22, a winding groove 413 is opened on the main body 4113, and the winding groove 413 includes a plurality of groove units 4131. The plurality of groove units 4131 are arranged at intervals along the length direction of the support rod 411, and the plurality of groove units 4131 are respectively distributed on the opposite sides of the circumferential direction of the support rod 411. The wire 440 passes through the plurality of groove units 4131 and the first wire threading hole a in turn to be connected to the electrode 420.

[0116] It can be understood that in some other embodiments, the winding groove 413 can also be a spiral structure as a whole, and the winding groove 413 spirally extends from the proximal end of the support rod 411 to a position close to the first wire threading hole a, and the wire 440 is passed through the winding groove 413 and extends along the inner wall of the winding groove 413.

[0117] Therefore, a winding groove 413 is opened on the main body 4113, and the wire 440 is passed through the winding groove 413, so that the winding groove 413 can provide space for the wire 440 to run and form a limit for the wire 440. When the tubular body is sleeved on the support rod 411, the wire 440 can be prevented from being pulled by the tubular body and displaced.

[0118] As shown in Figure 23, the support rod 411 also includes a connecting section 4114, which is arranged along the axial direction of the pushing member 430. One end of the connecting section 4114 is connected to the main body 4113, and the other end of the connecting section 4114 is connected to the pushing member 430. The ablation device 400 also includes a second tubular member 452, which is covered on the distal end of the pushing member 430 and extends from the distal end of the pushing member 430 to the connecting section 4114.

[0119] It should be noted that the distal end of the pusher 430 refers to the portion of the pusher 430 that is close to the connecting section 4114. The number of connecting sections 4114 corresponds to the number of support rods 411. Multiple connecting sections 4114 are arranged along the circumference of the pusher 430, and two circumferentially adjacent connecting sections 4114 are spaced apart. The second tubular member 452 is sleeved on all the connecting sections 4114. The second tubular member 452 has a certain degree of flexibility. When subjected to stress, the second tubular member 452 can be bent to accommodate the deformation of the connecting section 4114. The second tubular member 452 and the connecting section 4114 can be bonded, sutured, or interference fit. It should be noted that the suture connection refers to the second tubular member 452 being fixed to the connecting section 4114 by sutures. Interference fit means that the inner diameter of the second tubular member 452 is smaller than the outer diameter of the connecting section 4114. After the second tubular member 452 is sleeved on the connecting section 4114, there is a large static friction between the connecting section 4114 and the second tubular member 452. The wire 440 is located between the second tubular member 452 and the connecting section 4114.

[0120] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An ablation device, characterized in that, It includes a support structure, a wire, and multiple electrodes. The electrodes are arranged on the support structure. The wire includes an exposed portion, and the exposed portion is located between the electrode and the support structure and at least partially fits against the inner wall of the electrode.

2. The ablation device according to claim 1, wherein The support structure includes multiple support rods. The multiple support rods are arranged around the axis of the support structure. At least part of the wire fits against the inner side wall of the support rod and passes through the support rod to be connected to the electrode.

3. The ablation device according to claim 1, characterized in that, The electrode includes multiple connected coil units. The coil units are wound around the support structure. The exposed portion passes through the coil unit and fits against the inner wall of the coil unit.

4. The ablation device according to claim 1, characterized in that, The support structure includes multiple support units. The multiple support units are arranged along the circumference of the support structure. The electrode is arranged on the support unit, and the wire is located inside the support unit.

5. The ablation device according to claim 4, wherein, The electrode includes a first electrode and a second electrode connected in series. The support unit includes a first support unit. The first electrode and the second electrode are located on the first support unit, and the exposed portion is located inside the first electrode or the second electrode.

6. The ablation device according to claim 5, wherein, The electrode further includes a third electrode and a fourth electrode connected in series. The support unit includes a second support unit. The third electrode and the fourth electrode are located on the second support unit. The third electrode or the fourth electrode is connected in parallel with the first electrode or the second electrode. The second support unit is circumferentially adjacent to or circumferentially spaced from the first support unit.

7. The ablation device according to claim 4, characterized in that, The electrode includes a first electrode and a second electrode connected in series. The first electrode and the second electrode are respectively located on two adjacent support units. The exposed portion includes a first exposed portion and a second exposed portion. The first exposed portion is located inside the first electrode, and the second exposed portion is located inside the second electrode.

8. The ablation device according to claim 4, wherein The support unit includes a bent portion. The bent portion is located at the circumferential center of the support unit. At least two electrodes are respectively located on both sides of the bent portion.

9. The ablation device according to claim 8, wherein The two electrodes located on both sides of the bent portion have different circumferential distances from the bent portion.

10. The ablation device according to claim 2, wherein, The support structure includes a wall-attached rod. The support rod includes a deformed arm. The deformed arm is connected to the wall-attached rod. The electrode is connected to the wall-attached rod. The support rod is provided with a first wire-passing hole. The first wire-passing hole is located on the proximal side of the deformed arm. The first wire-passing hole is spaced from the deformed arm. The wire passes through the first wire-passing hole to be connected to the electrode.

11. The ablation device according to claim 10, characterized in that, The support rod is provided with a second wire-passing hole and a third wire-passing hole. The second wire-passing hole is located on the proximal side of the first wire-passing hole. The third wire-passing hole is located on the proximal side of the second wire-passing hole. The wire sequentially passes through the third wire-passing hole, the second wire-passing hole, and the first wire-passing hole from the radially inner side of the support structure to be connected to the electrode. The aperture of the first wire-passing hole is larger than the aperture of the second wire-passing hole or the third wire-passing hole.

12. The ablation device according to claim 11, wherein, An opening communicating with the second wire-passing hole is formed on the side wall of the second wire-passing hole. The opening penetrates the side wall of the support rod along the thickness direction of the support structure.

13. The ablation device according to claim 10, characterized in that, The two ends of the wall-adhering rod are respectively connected to two circumferentially adjacent support rods, and the two adjacent wall-adhering rods are spaced apart. The support rod includes a first deformation arm and a second deformation arm, the first deformation arm is connected to one wall-adhering rod, and the second deformation arm is connected to another wall-adhering rod, and the first threading hole is spaced apart from the first deformation arm or the second deformation arm.

14. The ablation device according to claim 10, wherein, The support rod is provided with a winding groove, which includes a plurality of groove units, and the plurality of groove units are arranged at intervals along the length direction of the support rod. The wire passes through the groove units and the first threading hole in sequence to connect with the electrode.

15. The ablation device according to claim 14, wherein It also includes a first tubular member, which is covered on the side wall of the support rod, and the tubular member extends from the proximal end of the support member to the proximal edge of the first threading hole.

16. The ablation device according to claim 1, wherein, It also includes a pushing member, the proximal end of the supporting structure is connected to the distal end of the pushing member, a cavity is opened in the pushing member, the wire is passed through the cavity and at least part of it passes through the distal end of the pushing member.

17. The ablation device according to claim 2, wherein, It also includes a pushing member and a second tubular member, wherein the second tubular member is covered on the distal end of the pushing member.

18. The ablation device according to claim 17, characterized in that, The ablation device also includes a cooling component, which is located radially inward of the support structure. A first cavity and a second cavity are opened in the pushing member. The wire is inserted into the first cavity, and the second cavity is connected to the cooling component.

19. An ablation system, characterized in that, The ablation device comprises the ablation device according to any one of claims 1 to 18, and further comprises a delivery device, wherein the delivery device is suitable for carrying the ablation device.

20. The ablation system according to claim 19, wherein The delivery device further comprises a handle, which comprises a shell. A winding post is arranged in the shell. The proximal end of the wire of the ablation device enters the shell through the distal end of the shell and is wound on the winding post.

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