Electrode structure and ablation device

Abstract

The invention provides an electrode structure and ablation equipment. The electrode structure comprises a first supporting tube which is provided with a tube cavity extending in the axial direction, the far end of the tube cavity is closed or provided with an opening, and the near end of the tube cavity is provided with a first opening; the electrode connector is connected to the near end of the first supporting tube, the electrode connector is provided with a channel connected with the first opening, and the tail end of the channel is provided with a second opening; the channel and the tube cavity form a continuous cavity penetrating through the electrode structure, and the continuous cavity extends to the far end of the first supporting tube from the second opening to form an axial passage allowing an interventional instrument to penetrate through, so that the interventional instrument such as an ablation optical fiber and a temperature measuring optical fiber can easily penetrate into the first supporting tube, and the operation efficiency is improved. Therefore, the assembling time of the electrode structure and the interventional instrument is saved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices. Specifically, this application relates to an electrode structure. Background Art

[0002] With the continuous development of science and technology, deep brain electrode stimulation technology (DBS) has been gradually applied to the treatment of idiopathic tremor, Parkinson's disease, Alzheimer's disease, dystonia, epilepsy, obsessive-compulsive disorder, depression and other diseases, which can achieve non-destructive, adjustable, reversible side effects and high safety treatment effects by emitting pulse signals to specific brain regions of patients to regulate disordered nerve conduction signals.

[0003] In related technologies, due to the small diameter of the electrode structure, the grasping during surgery and the penetration operation of interventional instruments such as ablation optical fibers are relatively difficult. Summary of the Invention

[0004] This application provides an electrode structure and an ablation device to solve the technical problem that the relatively small diameter of the electrode structure in related technologies makes the grasping during surgery and the penetration operation of interventional instruments such as ablation optical fibers relatively difficult.

[0005] In a first aspect, an embodiment of this application provides an electrode structure, including: A first support tube having a lumen extending axially, the distal end of the lumen being closed or provided with an opening, and the proximal end being provided with a first opening; An electrode connector connected to the proximal end of the first support tube, the electrode connector being provided with a channel connected to the first opening, and the end of the channel being provided with a second opening; The channel and the lumen form a continuous cavity penetrating the electrode structure, and the continuous cavity extends from the second opening to the distal end of the first support tube to form an axial passage for the penetration of interventional instruments.

[0006] Optionally, the connection manner between the electrode connector and the first support tube includes: detachable connection or non-detachable connection.

[0007] Optionally, the electrode structure further includes: a plurality of electrode contacts; The plurality of electrode contacts are arranged on the outer peripheral wall and / or the inner peripheral wall of the distal end of the first support tube, and are used to acquire biological information of the target biological tissue and / or output pulse signals to regulate the target biological tissue; The plurality of electrode contacts are arranged along the extension direction of the first support tube, and the distance between any two adjacent electrode contacts is equal or unequal.

[0008] Optionally, the electrode structure further includes at least one of the following: The shape of the electrode contact includes: annular or semi-annular; the electrode contact extends circumferentially along the first support tube; The material of the electrode contact includes: platinum-iridium alloy or titanium alloy; The diameter of the electrode contact includes: 0.05 - 0.8 mm.

[0009] Optionally, the electrode structure further includes a plurality of signal lines; Both ends of the signal line are electrically connected to the electrode contact and the electronic control unit in the electrode connector respectively.

[0010] Optionally, the second opening is configured to have a first state communicating with the outside and a second state isolated from the outside.

[0011] Optionally, a flexible circuit board is provided on the outer peripheral wall of the first support tube, the flexible circuit board includes a plurality of solder joints, and the plurality of electrode contacts are welded to the plurality of solder joints at the distal end of the flexible circuit board one by one.

[0012] Optionally, the electrode connector includes: a fixed part and a movable part; The fixed part is rotatably connected to the movable part, a first groove is provided on the fixed part, and a second groove is correspondingly provided on the movable part. When the movable part rotates to an opening and closing angle of zero relative to the fixed part, the first groove and the second groove form the channel.

[0013] Optionally, a plurality of conductive rings and a plurality of insulating rings are provided in the first groove; along the extending direction of the first groove, the plurality of conductive rings and the plurality of insulating rings are alternately arranged; the conductive rings and the insulating rings each extend circumferentially along the first groove.

[0014] Optionally, at least a part of the proximal end of the first support tube penetrates into the channel of the electrode connector; Electrode conduction contacts are provided on the outer peripheral wall of the proximal end of the first support tube, the electrode conduction contacts are welded to the solder joints of the flexible circuit board, and the electrode conduction contacts are arranged in one-to-one correspondence with the conductive rings in the first groove.

[0015] Optionally, when the second opening is in the first state, at least a part of the proximal end of the first support tube is fixed in the channel of the electrode connector, and the distance between the first opening and the second opening along the axial direction of the first support tube is not less than zero; Electrode conduction contacts are provided on the outer peripheral wall of the proximal end of the first support tube, the electrode conduction contacts are welded to the solder joints at the proximal end of the flexible circuit board, and the electrode conduction contacts are arranged in one-to-one correspondence with the conductive rings in the first groove.

[0016] Optionally, the second opening is in the second state, the proximal part of the first support tube is fixed in the channel of the electrode connector, and the distance between the first opening and the second opening along the axial direction of the first support tube is greater than zero; Electrode conduction contacts are provided on the outer peripheral wall of the proximal end of the first support tube, the electrode conduction contacts are welded to the solder joints at the proximal end of the flexible circuit board, and the electrode conduction contacts are arranged in one-to-one correspondence with the conductive rings in the first groove.

[0017] Optionally, the electrode connector includes: a plug; The proximal end of the first support tube is fixedly connected to the plug, and the plug is provided with the channel connected to the first opening; a circuit board is provided in the plug, and both ends of the signal line are electrically connected to the electrode contact and the circuit board respectively.

[0018] Optionally, the electrode structure further includes a temperature measuring resistor, the temperature measuring resistor is arranged on the outer peripheral wall of the distal end of the first support tube, and the temperature measuring resistor is located between two adjacent electrode contacts.

[0019] Optionally, annular guide grooves are provided in the first groove and the second groove, and a plurality of the conductive rings and a plurality of the insulating rings are slidably arranged in the annular guide grooves of the first groove and the second groove.

[0020] In a second aspect, an embodiment of the present application provides an ablation device, including an external device and the electrode structure according to any one of the first aspects above, and the electrode connector of the electrode structure is electrically connected to the external device.

[0021] The beneficial technical effects brought by the technical solutions provided by the embodiments of the present application include: In the electrode structure provided by the embodiment of the present application, the proximal end of the first support tube is connected to the electrode connector, the first support tube has a lumen extending along the axial direction, the end of the channel of the electrode connector is provided with a second opening, and the first opening at the proximal end of the first support tube is connected to the channel in the electrode connector to form a continuous cavity extending from the second opening to the distal end of the first support tube. The continuous cavity penetrates the electrode structure, so that intervention instruments such as ablation optical fibers and temperature measuring optical fibers can easily penetrate into the first support tube through the second opening of the electrode connector for subsequent operations, thereby saving the assembly time of the electrode structure and the intervention instruments.

[0022] In the electrode structure of the embodiment of the present application, an electrode connector is added. The electrode connector is electrically connected to the external device, and the intervention instrument penetrates into the electrode structure. Therefore, when the intervention instrument works, electroencephalogram signal monitoring can be carried out synchronously or electroencephalogram signal monitoring can be carried out at any time; moreover, adding an electrode connector to the electrode structure facilitates the grasping of the electrode structure during the operation.

[0023] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned through the practice of the present application. Brief Description of the Drawings

[0024] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the drawings, where: Figure 1 is the front view of the first electrode structure provided for an embodiment of the present application; Figure 2 is Figure 1 the enlarged partial view at A; Figure 3 is the top view of the first electrode structure provided for an embodiment of the present application; Figure 4 is the schematic structural view of the second electrode structure provided for an embodiment of the present application; Figure 5 is the schematic structural view of the third electrode structure provided for an embodiment of the present application; Figure 6 is the schematic structural view of the fourth electrode structure provided for an embodiment of the present application; Figure 7 is the schematic structural view of the electrode connector in the third electrode structure provided for an embodiment of the present application; Figure 8 is the schematic structural view of the electrode connector in the third electrode structure provided for an embodiment of the present application without a conductive ring and an insulating ring; Figure 9 is the schematic structural view of the electrode connector and the first support tube in the third electrode structure provided for an embodiment of the present application; Figure 10 is the schematic structural view of an ablation device provided for an embodiment of the present application; Figure 11 is the schematic structural view of another ablation device provided for an embodiment of the present application. Reference Signs: 1 - Electrode Structure; 11 - First Support Tube; 12 - Electrode Contact; 13 - Electrode Connector; 131 - Channel; 132 - Fixed Portion; 1321 - First Groove; 133 - Movable Portion; 1331 - Second Groove; 134 - Conductive Ring; 135 - Insulating Ring; 136 - Plug; 137 - Socket; 138 - Annular Guide Groove; 14 - Flexible Circuit Board; 141 - Solder Joint; 15 - Electrode Conductive Contact; 2 - Interventional Device. Detailed Description of the Embodiments

[0025] The embodiments of the present application will be described below in conjunction with the accompanying drawings in the present application. It should be understood that the embodiments described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions of the embodiments of the present application.

[0026] Those skilled in the art of the present technology can understand that, unless specifically stated, the "the" and "this" used here can also include the plural form. It should be further understood that the term "including" used in the specification of the present application means the presence of the described features, integers, steps, operations, elements, and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components, and / or their combinations supported by the art of the present technology, etc. The term "and / or" used here means at least one of the items defined by the term. For example, "A and / or B" can be implemented as "A", or implemented as "B", or implemented as "A and B".

[0027] To make the objectives, technical solutions, and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0028] With the continuous development of science and technology, deep brain electrode stimulation technology (DBS) has been gradually applied to the treatment of idiopathic tremor, Parkinson's disease, Alzheimer's disease, dystonia, epilepsy, obsessive-compulsive disorder, depression, etc., because it can regulate disordered nerve conduction signals by emitting pulsed signals to specific brain regions of patients, achieving a non-destructive, adjustable, reversible side-effect, and high-safety treatment effect.

[0029] In the related art, due to the small diameter of the electrode structure, the operations such as grasping during surgery and the penetration of intervention instruments such as ablation optical fibers are relatively difficult.

[0030] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other. For the same terms, similar features, and similar implementation steps in different embodiments, they will not be described repeatedly.

[0031] First, several terms related to the present application will be introduced and explained: In the present application, the proximal end refers to the end of the ablation device that is closer to the device operator during use, and the distal end refers to the end of the ablation device that is farther from the device operator during use.

[0032] The embodiments of the present application provide an electrode structure 1, as Figures 1-11 shown. The electrode structure 1 includes: a first support tube 11 and an electrode connector 13.

[0033] The first support tube 11 has a lumen extending axially. The distal end of the lumen is closed or provided with an opening, and the proximal end is provided with a first opening.

[0034] The electrode connector 13 is connected to the proximal end of the first support tube 11; the electrode connector 13 is provided with a channel 131 connected to the first opening, and the end of the channel 131 is provided with a second opening.

[0035] The channel 131 and the lumen form a continuous cavity through the electrode structure 1. The continuous cavity extends from the second opening to the distal end of the first support tube 11, forming an axial passage for the interventional instrument 2 to penetrate.

[0036] In the electrode structure 1 provided by the embodiment of the present application, the proximal end of the first support tube 11 is connected to the electrode connector 13. The first support tube 11 has a lumen extending axially. The end of the channel 131 of the electrode connector 13 is provided with a second opening. The first opening at the proximal end of the first support tube 11 is connected to the channel 131 in the electrode connector 13, forming a continuous cavity extending from the second opening to the distal end of the first support tube 11. The continuous cavity penetrates the electrode structure 1. Thus, interventional instruments 2 such as ablation optical fibers and temperature measurement optical fibers can easily penetrate into the first support tube 11 through the second opening of the electrode connector 13 for subsequent operations, thereby saving the assembly time of the electrode structure 1 and the interventional instrument 2.

[0037] In the electrode structure 1 of the embodiment of the present application, the electrode connector 13 is added. The electrode connector 13 is electrically connected to an external device. The interventional instrument 2 penetrates into the electrode structure 1. Thus, when the interventional instrument 2 works, electroencephalogram signal monitoring can be carried out synchronously or electroencephalogram signal monitoring can be carried out at any time; moreover, adding the electrode connector 13 in the electrode structure 1 facilitates the grasping of the electrode structure 1 during the operation.

[0038] Optionally, in an embodiment of the present application, as Figures 1-10 shown, the connection manner between the electrode connector 13 and the first support tube 11 includes: detachable connection or non-detachable connection.

[0039] In the embodiment of the present application, the electrode connector 13 is detachably or non-detachably connected to the first support tube 11, so that the same electrode structure 1 can be applicable to multiple surgical scenarios, thereby saving costs.

[0040] Optionally, in an embodiment of the present application, as Figures 1-11 shown, the electrode structure 1 further includes a plurality of electrode contacts 12.

[0041] The plurality of electrode contacts 12 are arranged on the outer peripheral wall and / or the inner peripheral wall of the distal end of the first support tube 11, and are used for acquiring biological information of the target biological tissue and / or outputting pulse signals to regulate the target biological tissue.

[0042] A plurality of electrode contacts 12 are arranged along the extending direction of the first support tube 11, and the distance between any two adjacent electrode contacts 12 is equal or unequal.

[0043] In the electrode structure 1 provided by the embodiment of the present application, a plurality of electrode contacts 12 are provided on the outer peripheral wall and / or the inner peripheral wall of the distal end of the first support tube 11. The plurality of electrode contacts 12 can collect and record electroencephalogram signals. The electronic control unit in the electrode connector 13 is electrically connected to the electrode contacts 12, and transmits the collected and recorded electroencephalogram signals to an external device electrically connected to the electrode connector 13 for data analysis and display, which can assist doctors in determining or adjusting treatment plans; the electrode connector 13 is connected to the proximal end of the first support tube 11. The first support tube 11 has a lumen extending along the axial direction. The proximal end of the first support tube 11 is provided with a first opening. A channel 131 is provided in the electrode connector 13, and the channel 131 is connected to the first opening of the first support tube 11. Thus, an intervention instrument 2 such as an ablation optical fiber and / or a temperature measurement optical fiber can easily penetrate into the first support tube 11 through the channel 131 of the electrode connector 13 for subsequent operations, thereby saving the assembly time of the electrode structure 1 and the intervention instrument 2.

[0044] In some embodiments, a plurality of electrode contacts 12 are provided only on the outer peripheral wall of the distal end of the first support tube 11, and the distal end of the first support tube 11 is provided with an opening or is closed.

[0045] In some embodiments, a plurality of electrode contacts 12 are provided only on the inner peripheral wall of the distal end of the first support tube 11, and the distal end of the first support tube 11 is provided with an opening.

[0046] In some embodiments, a plurality of electrode contacts 12 are provided on the outer peripheral wall of the distal end of the first support tube 11, and a plurality of electrode contacts 12 are also provided on the inner peripheral wall of the distal end of the first support tube 11. The distal end of the first support tube 11 is provided with an opening.

[0047] In some embodiments, some of the electrode contacts 12 are used to obtain biological information of the target biological tissue and transmit it to an external device, and some of the other electrode contacts 12 are used to apply the electrical signals output by the external device to the target biological tissue to regulate the target biological tissue.

[0048] In some embodiments, the electrode contacts 12 are both used to obtain biological information of the target biological tissue and transmit it to an external device, and to apply the electrical signals output by the external device to the target biological tissue to regulate the target biological tissue.

[0049] In some embodiments, the electrode contacts 12 are used to obtain biological information of the target biological tissue and transmit it to an external device under a first trigger condition, and to apply the electrical signals output by the external device to the target biological tissue to regulate the target biological tissue under a second trigger condition.

[0050] For example, the electrode contact 12 is used to acquire the biological information of the target biological tissue within the first time period and transmit it to an external device, and apply the electrical signal output by the external device to the target biological tissue within the second time period to regulate the target biological tissue.

[0051] Optionally, the external device may include an electroencephalograph, which is used to receive and display the biological information of the target biological tissue acquired by the electrode contact 12.

[0052] The external device may also be a signal generator, which is used to receive the first control signal from the controller, generate an electrical signal according to the first control signal, and transmit the electrical signal to the electrode contact 12; or, it is used to receive the biological information of the target biological tissue acquired by the electrode contact 12, generate an electrical signal according to the biological information of the target biological tissue, and transmit the electrical signal to the electrode contact 12. The electrode contact 12 applies the electrical signal to the target biological tissue to regulate the target biological tissue. Among them, the electrical signal may be a stimulation pulse signal or a radiofrequency current.

[0053] In some embodiments, regulating the target biological tissue may include electrically stimulating or thermocoagulating the target biological tissue.

[0054] For example, electrical stimulation directly changes the membrane potential of neurons and triggers action potentials by inputting stimulation pulse signals, thereby exciting neurons. Usually, external devices such as electrical stimulators or deep brain stimulators (DBS) are used to generate and control the intensity, frequency, and duration of the stimulation pulse signals. During use, the electrode structure 1 needs to be implanted into a specific neural structure or tissue, and then the stimulation pulse signal (for example, current stimulation) is applied through an external device. The parameters of the stimulation pulse signal (such as current intensity, frequency, and duration) can be adjusted as needed. It is applicable to the treatment of various neurological diseases, such as epilepsy, Parkinson's disease, dystonia, etc. In addition, electrical stimulation can also be used to promote nerve regeneration and repair damaged tissues.

[0055] Thermocoagulation uses the high-frequency oscillating energy generated by radiofrequency current to generate heat by friction between the electrode structure 1 and ions in the tissue, increasing the local temperature, and then causing the tissue to coagulate and necrosis. Mainly use external devices such as radiofrequency instruments or high-frequency electrosurgical units to generate radiofrequency current (high-frequency current) and conduct the current to the target biological tissue through the electrode structure 1. Usually, the high-frequency current is conducted to the target tissue through a skin-piercing electrode or a needle-shaped electrode. During the operation, the doctor will adjust the intensity and action time of the current according to the tissue resistance and temperature feedback. It is mainly used to treat painful diseases, such as trigeminal neuralgia, sciatica, etc. In addition, thermocoagulation can also be used for hemostasis, tissue cutting, and ablation in surgical operations.

[0056] Optionally, in an embodiment of the present application, such as Figures 1-6As shown, the electrode structure 1 further includes at least one of the following: The shape of the electrode contact 12 includes: annular or semi-annular; the electrode contact 12 extends circumferentially along the first support tube 11.

[0057] The material of the electrode contact 12 includes: platinum-iridium alloy or titanium alloy or medical stainless steel.

[0058] The diameter of the electrode contact 12 includes: 0.05 - 0.8 mm.

[0059] In the embodiment of the present application, the shape of the electrode contact 12 is designed to be annular or semi-annular. When the electrode structure 1 is implanted into the brain, the annular or semi-annular electrode contact 12 can be in full contact with biological tissues, so as to more accurately obtain biological information of the target biological tissues, such as collecting or recording electroencephalogram signals, etc. Selecting platinum-iridium alloy or titanium alloy or medical stainless steel as the material of the electrode contact 12 is because platinum-iridium alloy or titanium alloy is an implant-grade metal material with relatively stable electrochemical properties, thus ensuring the stable electrochemical properties of the electrode contact 12. The diameter of the electrode contact 12 is 0.05 - 0.8 mm, including a lower limit of 0.05 mm and an upper limit of 0.8 mm; the length of the electrode contact 12 includes 2 mm; the width of the electrode contact 12 includes 2.0 ± 0.2 mm, including a lower limit of 1.8 mm and an upper limit of 2.2 mm; the number of the electrode contacts 12 includes 8, 10, 12, 14, 16, 18, etc.

[0060] Optionally, in an embodiment of the present application, as Figures 1-11 shown, the electrode structure 1 further includes a plurality of signal lines; both ends of the signal lines are electrically connected to the electrode contact 12 and the electronic control unit in the electrode connector 13 respectively.

[0061] In the embodiment of the present application, one end of the signal line is electrically connected to the electrode contact 12, the other end of the signal line is electrically connected to the electronic control unit in the electrode connector 13, and the electronic control unit in the electrode connector 13 is electrically connected to an external device. Thus, the electroencephalogram signals collected and / or recorded by the electrode contact 12 can be transmitted to the external device through the electrode connector 13, and at the same time, the electrical signals of the operation instructions issued by the external device can be transmitted to the electrode contact 12 through the signal line, so that the electrode contact 12 performs electrical stimulation and / or thermocoagulation operations on the brain tissue at the lesion location.

[0062] It should be noted that the electronic control unit of the electrode connector 13 includes: a circuit board, a conductive ring, etc.

[0063] Optionally, in an embodiment of the present application, as Figure 1 、 Figures 3-6 and Figures 9-11 shown, the second opening is configured to have a first state communicating with the outside world and a second state isolated from the outside world.

[0064] In the embodiment of the present application, when the second opening is in the first state, along the axial direction of the first support tube 11, the second opening is located at the end of the electrode connector 13, and the channel 131 of the electrode connector 13 penetrates through the electrode connector 13. When the second opening is in the second state, the second opening is located inside the electrode connector 13, the channel 131 of the electrode connector 13 does not penetrate through the electrode connector 13, the front end of the channel 131 is connected to the first opening at the proximal end of the first support tube 11, and the second opening at the end of the channel 131 is located inside the electrode connector 13.

[0065] When the second opening is in the first state, the detachable connection methods between the first support tube 11 and the electrode connector 13 include: inserting and pulling the proximal end of the first support tube 11 into the channel 131, screwing the proximal end of the first support tube 11 with the channel 131, or placing the proximal end of the first support tube 11 in the openable and closable channel 131, etc. The non-detachable connection methods between the first support tube 11 and the electrode connector 13 include: at least part of the channel 131 of the electrode connector 13 is fixedly and inseparably connected to the first support tube 11 in forms such as sleeving or butting.

[0066] When the second opening is in the second state, the detachable connection methods between the first support tube 11 and the electrode connector 13 include: inserting and pulling the proximal end of the first support tube 11 into the channel 131, screwing the proximal end of the first support tube 11 with the channel 131, or placing the proximal end of the first support tube 11 in the openable and closable channel 131, etc. The non-detachable connection methods between the first support tube 11 and the electrode connector 13 include: fixing the proximal part of the first support tube 11 in the openable and closable channel 131.

[0067] Optionally, in an embodiment of the present application, as Figures 1-6 shown, a flexible circuit board 14 is provided on the outer peripheral wall of the first support tube 11. The flexible circuit board 14 includes a plurality of solder joints 141, and a plurality of electrode contacts 12 are welded to the plurality of solder joints 141 at the distal end of the flexible circuit board 14 in a one-to-one correspondence.

[0068] In the embodiment of the present application, the flexible circuit board 14 is provided on a part of the outer peripheral wall of the first support tube 11. The electrode structure 1 includes a plurality of signal lines. A plurality of electrode contacts 12 located on one side of the first support tube 11 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in a one-to-one correspondence. One end of the signal line is welded to the solder joints 141 in a one-to-one correspondence, and the other end of the signal line is electrically connected to the electronic control unit of the electrode connector 13 through the electrode connector 13. The electronic control unit 13 is electrically connected to an external device, so that the electroencephalogram signals collected and / or recorded by the electrode contacts 12 can be transmitted to the external device, and at the same time, the electrical signals of the operation instructions issued by the external device can be transmitted to the electrode contacts 12 through the signal lines, so that the electrode contacts 12 perform electrical stimulation and / or thermocoagulation operations on the brain tissue at the lesion location.

[0069] In an embodiment of the present application, after the electrode contact 12 is welded to the solder joint 141 of the flexible circuit board 14, a transparent waterproof adhesive is coated on the side of the flexible circuit board 14 away from the first support tube 11. The solder joint 141 can be located at the edge position of the contact 12 or in the middle of the contact 12.

[0070] In an embodiment of the present application, a plurality of electrode contacts 12 are arranged along the extending direction of the first support tube 11, and the distance between any two adjacent electrode contacts 12 includes: 1.5 ± 0.2 mm, including a lower limit of 1.3 mm and an upper limit of 1.7 mm.

[0071] Optionally, in an embodiment of the present application, as Figures 5-9 shown, the electrode connector 13 includes: a fixing portion 132 and a movable portion 133.

[0072] The fixing portion 132 is rotatably connected to the movable portion 133. A first groove 1321 is provided on the fixing portion 132, and a corresponding second groove 1331 is provided on the movable portion 133. When the opening and closing angle of the movable portion 133 relative to the fixing portion 132 is zero, the first groove 1321 and the second groove 1331 form a channel 131.

[0073] A plurality of conductive rings 134 and a plurality of insulating rings 135 are provided in the first groove 1321; along the extending direction of the first groove 1321, the plurality of conductive rings 134 and the plurality of insulating rings 135 are arranged alternately; the conductive rings 134 and the insulating rings 135 each extend circumferentially along the first groove 1321.

[0074] In an embodiment of the present application, the movable portion 133 of the electrode connector 13 and the fixing portion 132 can be connected together by a rotating shaft. The opening and closing angle at which the movable portion 133 can rotate relative to the fixing portion 132 includes: 0 - 90°. When the opening and closing angle of the movable portion 133 relative to the fixing portion 132 is zero, the movable portion 133 and the fixing portion 132 are in a closed state, and the first groove 1321 and the second groove 1331 form a channel 131. The channel 131 is connected to the first support tube 11. At this time, the interventional device 2 can enter the first support tube 11 through the channel 131, so that the interventional device 2 such as an ablation optical fiber can be used in subsequent laser ablation surgeries. When the rotational opening and closing angle of the movable portion 133 relative to the fixing portion 132 is greater than zero, the movable portion 133 and the fixing portion 132 are in an open state. At this time, the first support tube 11 can be installed in the channel 131 or the first support tube 11 can be removed from the channel 131.

[0075] In the embodiment of the present application, a plurality of conductive rings 134 and a plurality of insulating rings 135 are provided in the second groove 1331; along the extending direction of the second groove 1331, the plurality of conductive rings 134 and the plurality of insulating rings 135 are arranged alternately; the conductive rings 134 and the insulating rings 135 each extend circumferentially along the second groove 1331. When the movable part 133 rotates to an opening / closing angle of zero relative to the fixed part 132, the first groove 1321 and the second groove 1331 form a channel 131, and the plurality of conductive rings 134 and the plurality of insulating rings 135 in the first groove 1321 correspond one by one to the plurality of conductive rings 134 and the plurality of insulating rings 135 in the second groove 1331, so that the conductive rings 134 and the insulating rings 135 each extend circumferentially along the channel 131. The material of the conductive ring 134 includes metals, etc., for conducting electricity; the material of the insulating ring 135 includes silica gel, etc., and the insulating ring 135 is used for sealing and isolating between adjacent conductive rings 134. The electronic control unit in the electrode connector 13 is electrically connected to both the plurality of conductive rings 134 in the first groove 1321 and the plurality of conductive rings 134 in the second groove 1331. It should be noted that in the present application, conductive rings 134 and insulating rings 135 may also be provided only in the first groove 1321, and no conductive rings 134 and insulating rings 135 are provided in the second groove 1331.

[0076] Optionally, in an embodiment of the present application, as Figures 7-8 shown, annular guide grooves 138 are provided in the first groove 1321 and the second groove 1331, and the plurality of conductive rings 134 and the plurality of insulating rings 135 are slidably arranged in the annular guide grooves 138 of the first groove 1321 and the second groove 1331.

[0077] In the embodiment of the present application, as Figures 7-8 shown, the plurality of conductive rings 134 and the insulating rings 135 are slidably embedded in the annular guide grooves 138 of the first groove 1321 and the second groove 1331, for example, by means of snap connection, interference fit, standing street, etc., so that the electrode connector 13 has the ability of dynamic adaptation. By adjusting the axial distance between the conductive ring 134 and the insulating ring 135, the distance specification of the proximal contacts of the first support tube 11 can be matched, so as to realize the rapid adaptation to electrode modules with different contact specifications.

[0078] Optionally, in an embodiment of the present application, as Figure 5 and Figure 7 shown, at least a part of the proximal end of the first support tube 11 penetrates into the channel 131 of the electrode connector 13.

[0079] Electrode conduction contacts 15 are provided on the outer peripheral wall of the proximal end of the first support tube 11. The electrode conduction contacts 15 are welded to the solder joints 141 of the flexible circuit board 14, and the electrode conduction contacts 15 are arranged in one-to-one correspondence with the conductive rings 134 in the first groove 1321.

[0080] In the embodiment of the present application, when the second opening at the end of the channel 131 is in the first state or the second state, electrode conduction contacts 15 are provided on the outer peripheral wall of the proximal end of the first support tube 11. During installation, the movable part 133 of the electrode connector 13 is rotated relative to the fixed part 132 to an opening / closing angle of 90°, the first support tube 11 is placed into the first groove 1321 of the fixed part 132, and the electrode conduction contacts 15 on the outer peripheral wall of the first support tube 11 are arranged in one-to-one correspondence with the conductive rings 134 in the first groove 1321. Then, the movable part 133 of the electrode connector 13 is rotated until the opening / closing angle of the movable part 133 relative to the fixed part 132 is zero, so that the conductive rings 134 in the second groove 1331 are arranged in one-to-one correspondence with the electrode conduction contacts 15 on the outer peripheral wall of the proximal end of the first support tube 11. Thus, the electrode conduction contacts 15 are electrically connected to the conductive rings 134, and the electrode conduction contacts 15 at the proximal end of the first support tube 11 are welded to the solder joints 141 at the proximal end of the flexible circuit board 14 in one-to-one correspondence; the proximal ends of the signal lines are welded to the solder joints 141 at the proximal end of the flexible circuit board 14 in one-to-one correspondence; the plurality of electrode contacts 12 at the distal end of the first support tube 11 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence, and the distal ends of the signal lines are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence. Thus, the electroencephalogram signals collected and / or recorded by the electrode contacts 12 are sequentially transmitted through the signal lines, the electrode conduction contacts 15, and the conductive rings 134 to an external device (such as an electroencephalograph) connected to the electrode connector 13.

[0081] In the embodiment of the present application, when the second opening at the end of the channel 131 is in the first state, after the first support tube 11 is placed into the channel 131 of the electrode connector 13, the intervention device 2 can penetrate into the continuous cavity through the second opening at the end of the channel 131. When the second opening at the end of the channel 131 is in the second state, the intervention device 2 first penetrates into the lumen of the first support tube 12 through the first opening at the proximal end of the first support tube 12, and then, according to the actual scenario requirements, the first support tube 12 containing the intervention device 2 can be placed into the first groove 1321.

[0082] It should be noted that when the opening / closing angle of the movable part 133 of the electrode connector 13 relative to the fixed part 132 is greater than zero, the circuit connection between the electrode connector 13 and the electrode structure 1 is disconnected, and when the opening / closing angle of the movable part 133 of the electrode connector 13 relative to the fixed part 132 is zero, the circuit between the electrode connector 13 and the electrode structure 1 is conducted.

[0083] In the embodiment of the present application, the first support tube 11 includes a TPU (Thermoplastic Polyurethane) tube.

[0084] In the embodiment of the present application, when the second opening is in the first state, the first support tube 11 provided with the electrode contact 12 area has a certain rigidity, which is convenient for the electrode structure 1 to be inserted into the target biological tissue. Moreover, the first support tube 11 provided with the electrode contact 12 area has a certain rigidity, and the first support tube 11 can support the electrode contact 12; the first support tube 11 located in the channel 131 of the electrode connector 13 has a certain rigidity. Thus, when the opening and closing angle of the movable part 133 of the electrode connector 13 relative to the fixed part 132 is zero, the first support tube 11 located in the channel 131 is not easily deformed, thereby reserving a channel for the interventional instrument 2 to pass through, and facilitating the interventional instrument 2 to penetrate through the proximal end of the first support tube 11; the remaining areas of the first support tube 11 except for the electrode contact 12 and those located outside the channel 131 have a certain flexibility.

[0085] In the embodiment of the present application, when the second opening is in the second state, the area of the first support tube 11 provided with the electrode contact 12 has a certain rigidity, and the remaining areas have a certain flexibility. During installation, the interventional instrument 2 is inserted into the first support tube 11 from the proximal end of the first support tube 11. Then, the movable part 133 of the electrode connector 13 is rotated relative to the fixed part 132 to an opening and closing angle of 90°. The first support tube 11 into which the interventional instrument 2 is inserted is placed in the first groove 1321 of the fixed part 132, and the electrode conduction contacts 15 on the outer peripheral wall of the first support tube 11 are arranged in one-to-one correspondence with the conductive rings 134 in the first groove 1321. Then, the movable part 133 of the electrode connector 13 is rotated until the opening and closing angle of the movable part 133 relative to the fixed part 132 is zero, so that the conductive rings 134 in the second groove 1331 are arranged in one-to-one correspondence with the electrode conduction contacts 15 on the outer peripheral wall of the proximal end of the first support tube 11. Thus, the electrode conduction contacts 15 are electrically connected to the conductive rings 134, and the electrode conduction contacts 15 at the proximal end of the first support tube 11 are welded to the solder joints 141 at the proximal end of the flexible circuit board 14 in one-to-one correspondence; the plurality of electrode contacts 12 at the distal end of the first support tube 11 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence, and the distal ends of the signal lines of the flexible circuit board 14 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence. Thus, the electroencephalogram signals collected and / or recorded by the electrode contacts 12 are sequentially transmitted to an external device such as an electroencephalograph connected to the electrode connector 13 via the signal lines, the electrode conduction contacts 15, and the conductive rings 134.

[0086] Optionally, in an embodiment of the present application, as shown in Figures 7-9 the figure, the second opening is in the first state, at least a part of the proximal end of the first support tube 11 is fixed in the channel of the electrode connector 13, and the distance between the first opening and the second opening along the axial direction of the first support tube 11 is not less than zero.

[0087] On the outer peripheral wall of the proximal end of the first support tube 11, there are provided electrode conduction contacts 15, and the electrode conduction contacts 15 are welded to the solder joints 141 at the proximal end of the flexible circuit board 14. The electrode conduction contacts 15 are arranged in one-to-one correspondence with the conductive rings 134 in the first groove 1321.

[0088] In the embodiment of the present application, the second opening communicates with the outside and is in the first state. The first support tube 11 is fixed in the first groove 1321. The first opening at the proximal end of the first support tube 11 is aligned with the second opening at the end of the channel 131 or the proximal end of the first support tube 11 partially overlaps with the channel 131. The electrode conduction contacts 15 on the outer peripheral wall of the proximal end of the first support tube 11 are electrically connected to the conductive rings 134 in the first groove 1321. The electrode conduction contacts 15 at the proximal end of the first support tube 11 are welded to the solder joints 141 at the proximal end of the flexible circuit board 14 in one-to-one correspondence. The proximal ends of the signal lines are welded to the solder joints 141 at the proximal end of the flexible circuit board 14 in one-to-one correspondence. The plurality of electrode contacts 12 at the distal end of the first support tube 11 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence. The distal ends of the signal lines of the flexible circuit board 14 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 in one-to-one correspondence. Thus, the electroencephalogram signals collected and / or recorded by the electrode contacts 12 are sequentially transmitted to an external device such as an electroencephalograph connected to the electrode connector 13 via the signal lines, the electrode conduction contacts 15, and the conductive rings 134.

[0089] Optionally, in an embodiment of the present application, as Figure 6 shown, the second opening is in the second state. The proximal part of the first support tube 11 is fixed in the channel 131 of the electrode connector 13, and the distance between the first opening and the second opening along the axial direction of the first support tube 11 is greater than zero.

[0090] On the outer peripheral wall of the proximal end of the first support tube 11, there are provided electrode conduction contacts 15, and the electrode conduction contacts 15 are welded to the solder joints 141 at the proximal end of the flexible circuit board 14. The electrode conduction contacts 15 are arranged in one-to-one correspondence with the conductive rings 134 in the first groove 1321.

[0091] In the embodiment of the present application, the channel 131 does not penetrate the electrode connector 131, and the second opening is located in the electrode connector 13. The first support tube 11 is fixed in the first groove 1321, and there is a certain distance between the first opening at the proximal end of the first support tube 11 and the second opening. When performing the operation of inserting the interventional device 2 into the electrode structure 1, the movable part 133 of the electrode connector 13 is rotated relative to the fixed part 132 to an opening and closing angle of 90°, and the interventional device 2 with a certain flexibility is inserted into the first support tube 11 through the space between the first opening and the second opening.

[0092] Optionally, in an embodiment of the present application, as Figures 1-4 and Figure 10 shown, the electrode connector 13 includes: a plug 136.

[0093] The proximal end of the first support tube 11 is fixedly connected to the plug 136, and a channel 131 connected to the first opening is provided in the plug 136; a circuit board is provided in the plug 136, and both ends of the signal line are electrically connected to the electrode contact 12 and the circuit board respectively.

[0094] In the embodiment of the present application, when the second opening is in the first state, the plug 136 and the proximal end of the first support tube 11 are fixedly connected, the first opening at the proximal end of the first support tube 11 is aligned with the second opening at the end of the channel 131 or the proximal end of the first support tube 11 partially overlaps with the channel 131, the channel 131 of the plug 136 is connected to the first opening at the proximal end of the first support tube 11, the second opening at the end of the channel 131 communicates with the outside, and the intervention device 2 penetrates into the axial passage from the second opening.

[0095] In the embodiment of the present application, the electrode connector 13 further includes a socket 137, and the plug 136 is inserted into the socket 137. The plurality of electrode contacts 12 at the distal end of the first support tube 11 are welded to the solder joints 141 at the distal end of the flexible circuit board 14 one by one. The distal ends of the signal lines are welded to the distal ends of the solder joints 141 one by one, and the proximal ends of the signal lines are welded to the circuit board of the plug 136. A plurality of pins or gold fingers are provided on the circuit board. The plug 136 is electrically connected to the socket 137 through the pins or gold fingers. Thus, the electroencephalogram signals collected and / or recorded by the electrode contacts 12 are transmitted to an external device such as an electroencephalograph connected to the electrode connector 13 through the signal lines, the plug 136, and the socket 137 in sequence.

[0096] It should be noted that the plug 136 can also be electrically connected to other devices through pins or gold fingers.

[0097] Optionally, in an embodiment of the present application, the electrode structure 1 further includes a temperature measuring resistor, and the temperature measuring resistor is provided on the outer peripheral wall of the distal end of the first support tube 11, and the temperature measuring resistor is located between two adjacent electrode contacts 12.

[0098] In the embodiment of the present application, the positions of the temperature measuring resistors include: in the middle of two electrode contacts 12, and close to one of the two electrode contacts 12.

[0099] Based on the same inventive concept, the embodiment of the present application provides an ablation device, as Figures 10-11 shown, the ablation device includes an external device and the electrode structure 1 as described in any of the above embodiments, and the electrode connector 13 of the electrode structure 1 is electrically connected to the external device.

[0100] In the embodiment of the present application, the electrode connector 13 of the electrode structure 1 is electrically connected to the external device, so that the electroencephalogram signals collected and / or recorded by the electrode contacts 12 of the electrode structure 1 can be transmitted to an external device such as an electroencephalograph through the electrode connector 13.

[0101] In the embodiments of the present application, as Figures 10-11 shown, the ablation device further includes an interventional instrument 2, and the interventional instrument 2 includes one of an ablation optical fiber, an ablation needle, a temperature measurement optical fiber, a temperature measurement resistor, a navigation needle, a deep brain electrode, a SEEG electrode, etc.

[0102] In the embodiments of the present application, the distal end of the first support tube 11 can be a closed end or an open end. When it is an open end, it can be fully open or semi-open. The first support tube 11 can be transparent. Taking the interventional instrument 2 as an ablation optical fiber as an example, the ablation optical fiber passes through the proximal end of the channel 131 of the electrode connector 13 and enters the first support tube 11 until the distal end of the first support tube 11. The electrode structure 1 is used to detect the location of the intracranial lesion of the patient. When the electrode structure 1 is in the lesion location, a laser ablation operation can be performed through the ablation optical fiber, and an ablation optical fiber of a suitable model can be selected according to the size of the lesion. When performing laser ablation, the laser emitted by the ablation optical fiber is emitted from the gap of the electrode contact 12 and absorbed by the lesion tissue, so as to achieve the purpose of ablation.

[0103] Applying the embodiments of the present application can at least achieve the following beneficial effects: 1. For the electrode structure 1 provided in the embodiments of the present application, the proximal end of the first support tube 11 is connected to the electrode connector 13. The first support tube 11 has a lumen extending along the axial direction. The end of the channel 131 of the electrode connector 13 is provided with a second opening. The first opening at the proximal end of the first support tube 11 is connected to the channel 131 in the electrode connector 13, forming a continuous cavity extending from the second opening to the distal end of the first support tube 11. The continuous cavity penetrates the electrode structure 1. Thus, interventional instruments 2 such as ablation optical fibers and temperature measurement optical fibers can easily pass through the second opening of the electrode connector 13 and penetrate into the first support tube 11 for subsequent operations, thereby saving the assembly time of the electrode structure 1 and the interventional instrument 2.

[0104] The electrode connector 13 is added to the electrode structure 1 in the embodiments of the present application. The electrode connector 13 is electrically connected to an external device. The interventional instrument 2 penetrates into the electrode structure 1. Thus, when the interventional instrument 2 is working, electroencephalogram signal monitoring can be performed synchronously or electroencephalogram signal monitoring can be performed at any time, that is, the electrode structure 1 and the interventional instrument can work simultaneously; moreover, adding the electrode connector 13 to the electrode structure 1 facilitates the grasping of the electrode structure 1 during the operation.

[0105] Those skilled in the art of the present application can understand that the various operations, methods, steps, measures, and solutions in the processes discussed in the present application can be alternated, changed, combined, or deleted. Further, other steps, measures, and solutions in the various operations, methods, and processes discussed in the present application can also be alternated, changed, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and solutions in the related art that are the same as those disclosed in the various operations, methods, and processes in the present application can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0106] In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or positional relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0107] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0108] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0109] In the description of this specification, the specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0110] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the technical concept of the solution of the present application, adopting other similar implementation means based on the technical idea of the present application also belongs to the protection scope of the embodiments of the present application.

Claims

1. An electrode structure, characterized in that: include: A first support tube having a lumen extending in the axial direction, wherein the distal end of the lumen is closed or provided with an opening, and the proximal end is provided with a first opening; An electrode connector connected to the proximal end of the first support tube, the electrode connector being provided with a channel connected to the first opening, and a second opening being provided at the end of the channel; The channel and the lumen form a continuous cavity that penetrates the electrode structure. The continuous cavity extends from the second opening to the distal end of the first support tube, forming an axial passage for the interventional instrument to penetrate.

2. The electrode structure according to claim 1, characterized in that: The connection mode between the electrode connector and the first support tube includes: detachable connection or non-detachable connection.

3. The electrode structure according to claim 2, characterized in that: Also includes: Multiple electrode contacts; The plurality of electrode contacts are arranged on the outer peripheral wall and / or the inner peripheral wall of the distal end of the first support tube, and are used to obtain biological information of the target biological tissue and / or output pulse signals to regulate the target biological tissue; The plurality of electrode contacts are arranged along the extension direction of the first support tube, and the intervals between any two adjacent electrode contacts are equal or unequal.

4. The electrode structure according to claim 3, characterized in that: Also includes at least one of the following: The shape of the electrode contact includes: annular or semi-annular; the electrode contact extends along the circumference of the first support tube; The material of the electrode contact includes: platinum-iridium alloy or titanium alloy or medical stainless steel; The diameter of the electrode contact includes: 0.05-0.8 mm.

5. The electrode structure according to claim 3, characterized in that: Also includes multiple signal lines; Both ends of the signal line are electrically connected to the electrode contact and the electric control unit in the electrode connector respectively.

6. The electrode structure according to claim 5, characterized in that: The second opening is configured to have a first state communicating with the outside and a second state isolated from the outside.

7. The electrode structure according to claim 6, characterized in that: A flexible circuit board is disposed on the outer peripheral wall of the first support tube. The flexible circuit board includes a plurality of welding points. The plurality of electrode contacts are welded to the plurality of welding points at the far end of the flexible circuit board in a one-to-one correspondence.

8. The electrode structure according to claim 7, characterized in that: The electrode connector comprises: a fixed part and a movable part; The fixed part is rotatably connected to the movable part, the fixed part is provided with a first groove, and the movable part is correspondingly provided with a second groove, and when the movable part rotates to an opening and closing angle of zero relative to the fixed part, the first groove and the second groove form the channel; A plurality of conductive rings and a plurality of insulating rings are arranged in the first slot; along the extension direction of the first slot, the plurality of conductive rings and the plurality of insulating rings are arranged alternately; the conductive rings and the insulating rings each extend along the circumference of the first slot.

9. The electrode structure according to claim 8, characterized in that: The proximal end of the first support tube at least partially penetrates into the channel of the electrode connector; An electrode conduction contact is provided on the outer peripheral wall of the proximal end of the first support tube, and the electrode conduction contact is welded to the welding point of the proximal end of the flexible circuit board. The electrode conduction contact is arranged in a one-to-one correspondence with the conductive ring in the first groove.

10. The electrode structure according to claim 8, characterized in that: The second opening is in a first state, the proximal end of the first support tube is at least partially fixed in the channel of the electrode connector, and the distance between the first opening and the second opening along the axial direction of the first support tube is not less than zero; An electrode conduction contact is provided on the outer peripheral wall of the proximal end of the first support tube, and the electrode conduction contact is welded to the welding point of the proximal end of the flexible circuit board. The electrode conduction contact is arranged in a one-to-one correspondence with the conductive ring in the first groove.

11. The electrode structure according to claim 8, characterized in that: The second opening is in a second state, the proximal end portion of the first support tube is fixed in the channel of the electrode connector, and the distance between the first opening and the second opening along the axial direction of the first support tube is greater than zero; An electrode conduction contact is provided on the outer peripheral wall of the proximal end of the first support tube, and the electrode conduction contact is welded to the welding point of the proximal end of the flexible circuit board. The electrode conduction contact is arranged in a one-to-one correspondence with the conductive ring in the first groove.

12. The electrode structure according to claim 6, characterized in that: The electrode connector comprises: a plug; The proximal end of the first support tube is fixedly connected to the plug, and the plug is provided with the passage connected to the first opening; the plug is provided with a circuit board, and both ends of the signal line are electrically connected to the electrode contacts and the circuit board respectively.

13. The electrode structure according to claim 3, characterized in that: It also includes a temperature measuring resistor, which is arranged on the outer peripheral wall of the far end of the first support tube and is located between two adjacent electrode contacts.

14. The electrode structure according to claim 8, characterized in that: An annular guide groove is provided in the first groove and the second groove, and the plurality of the conductive rings and the plurality of the insulating rings are slidably arranged in the annular guide grooves of the first groove and the second groove.

15. An ablation device, characterized in that: The invention comprises an external device and an electrode structure as claimed in any one of claims 1 to 14, wherein an electrode connector of the electrode structure is electrically connected to the external device.

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