Electrode structure and electrode device

Abstract

This application provides an electrode structure and an electrode device. The electrode structure includes: a sleeve comprising a first rigid segment, a flexible transition segment, and a second rigid segment connected sequentially along the axial direction, wherein the flexural modulus of the first rigid segment and the second rigid segment is greater than that of the flexible transition segment; at least one electrode contact disposed on the outer peripheral wall and / or inner peripheral wall of the distal end of the first rigid segment, for acquiring information about the target biological tissue and / or regulating the target biological tissue; at least one first connecting contact point electrically connected to the electrode contact; and an electrode connector having a connecting channel connected to the second rigid segment, wherein a second connecting contact point matching the first connecting contact point is disposed within the connecting channel, and the electrode contact is electrically connected to the electrode connector via the first connecting contact point and the second connecting contact point; the connecting channel, the first rigid segment, the flexible transition segment, and the second rigid segment form a continuous cavity penetrating the electrode structure, allowing interventional instruments to be inserted and providing a guiding and positioning function.

Description

Technical Field

[0001] This application relates to the field of laser ablation technology, and more specifically, to an electrode structure and an electrode device. Background Technology

[0002] Laser ablation technology uses a laser to generate high-energy laser light, which is transmitted through an ablation fiber to the target biological tissue (lesion area) to be ablated. It utilizes the thermal, photomechanical (shock wave), or photochemical effects of the laser to fragment stones, cut soft tissue, or thermally coagulate and denature proteins. Laser ablation technology is widely used due to its short ablation time and small incision size.

[0003] In related technologies, the electrode device delivers the interventional instrument for ablation into the target biological tissue through a cannula. The rigidity of the cannula remains unchanged at each position, making it difficult to balance the overall flexibility and rigidity. Related technologies also use other electrode structures to deliver the electrode into the target biological tissue to improve the functionality of the electrode device, resulting in a complex structure and cumbersome operation. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing an electrode structure and electrode device to solve technical problems such as unchanged sleeve rigidity, complex structure, or cumbersome operation in related technologies.

[0005] In a first aspect, embodiments of this application provide an electrode structure, including: The sleeve comprises a first rigid section, a flexible transition section and a second rigid section connected sequentially along the axial direction, wherein the flexural modulus of the first rigid section and the second rigid section is greater than the flexural modulus of the flexible transition section. At least one electrode contact is disposed on the outer and / or inner peripheral walls at the distal end of the first rigid segment, for acquiring information about the target biological tissue and / or regulating the target biological tissue; At least one first contact point is disposed on the outer peripheral wall near the end of the second rigid section and is electrically connected to the electrode contact point; An electrode connector has a connection channel connected to a second rigid section, and at least one second contact point matching a first contact point is provided in the connection channel. The electrode contact is electrically connected to the electrode connector via the first and second contact points. The connecting channel, the first rigid section, the flexible transition section and the second rigid section form a continuous cavity that runs through the electrode structure. The continuous cavity allows interventional instruments to be inserted and has a guiding and positioning function.

[0006] In some possible embodiments, at least one of the first rigid segment and the second rigid segment is a three-layer structure, comprising a first flexible layer, a rigid layer, and a second flexible layer; The first flexible layer is used for contact with interventional instruments, and the second flexible layer is used for contact with biological tissue during puncture.

[0007] In some possible embodiments, the electrode connector is connected to the second rigid segment via a non-detachable connection or a detachable connection.

[0008] In some possible embodiments, the flexural modulus of the first rigid segment is less than that of the second rigid segment.

[0009] In some possible embodiments, the distal end of the first rigid segment is closed or at least partially open.

[0010] In some possible embodiments, the electrode structure further includes: At least one channel structure, open at both ends and hollow, is inserted inside the sleeve; The inlet of the channel structure is located at the proximal opening of the second rigid section, and the outlet of the channel structure is located at at least one of the distal opening of the first rigid section and the distal outer peripheral wall. The outlet of the channel structure is offset from the position of the electrode contact. The channel structure allows interventional instruments to pass through.

[0011] In some possible embodiments, the electrode contacts include at least two, spaced apart on the outer peripheral wall of the distal end of the first rigid segment; The outlet of the channel structure is located between adjacent electrode contacts on the distal outer peripheral wall of the first rigid section.

[0012] In some possible embodiments, the electrode structure further includes: The occlusion component is flexible, with its outer peripheral wall fixedly connected to the inner peripheral wall at the distal end of the channel structure. It is configured to deform to open the exit of the channel structure when an interventional instrument passes through it, and to occlude the exit of the channel structure without external force.

[0013] In some possible embodiments, the electrode structure further includes at least one of the following: The temperature sensing resistor is installed on the outer peripheral wall at the far end of the first rigid section; The temperature sensing resistor is set on the closed outer end face at the far end of the first rigid section; The temperature-sensing optical fiber is embedded in the outer peripheral wall of the sleeve and extends along the axial direction of the sleeve. The monitoring end of the temperature-sensing optical fiber is fixed at the far end of the first rigid section.

[0014] In some possible embodiments, the temperature sensing resistor is disposed on the outer peripheral wall at the distal end of the first rigid segment, between adjacent electrode contacts.

[0015] In some possible embodiments, the monitoring end of the temperature-sensing optical fiber is located between adjacent electrode contacts.

[0016] Secondly, embodiments of this application also provide an electrode device, including an interventional instrument and any of the electrode structures provided in the first aspect above; Interventional devices are inserted into the continuous cavity of the electrode structure.

[0017] In some possible embodiments, the interventional device includes at least one of: an ablation fiber, a temperature-sensing fiber, an electrode structure, a navigation needle, and a mandrel.

[0018] The beneficial technical effects of the technical solutions provided in this application include: In this embodiment, the electrode structure has a hollow cannula serving as the insertion channel for the interventional device. It is a three-section cannula structure, comprising a first rigid section at each end, a second rigid section, and a flexible transition section in the middle. Appropriate flexural moduli are set according to different positions and functions, ensuring the cannula maintains suitable flexibility and rigidity during puncture, thus improving puncture efficiency. The cannula and electrode connector are electrically connected via contact points, allowing for a detachable design and increased structural flexibility. The continuous cavity for insertion of the interventional device integrates the internal channel of the cannula and the connection channel of the electrode connector, enabling a compact structural layout and reducing redundant design. Furthermore, the continuous cavity serves as the insertion channel for the interventional device, eliminating the need for repeated implantation of other electrode probes within the cannula, reducing operational complexity and improving ablation efficiency. In addition, the electrode structure and interventional device of this invention employ a synergistic structural design, achieving simultaneous operation and real-time monitoring of the interventional device through the channels in the electrode structure. This allows for continuous monitoring of the target area's signal during interventional device operation via the electrode structure, improving operational accuracy and safety.

[0019] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of an electrode structure provided in an embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of an electrode structure provided in an embodiment of this application; Figure 3 for Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a schematic diagram of another electrode structure provided in an embodiment of this application; Figure 5 This is a schematic diagram of another electrode structure provided in an embodiment of this application; Figure 6 This is a schematic diagram of another electrode structure provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of an electrode device provided in an embodiment of this application; Figure 8 This is a schematic diagram of another electrode device provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of another electrode device provided in an embodiment of this application; Figure 10 This is a schematic diagram of another electrode device provided in an embodiment of this application; Figure 11 This is a schematic diagram of the structure of an electrode connector provided in an embodiment of this application; Figure 12 for Figure 11 A schematic diagram of the middle electrode connector excluding the conductive ring and insulating ring.

[0021] Figure label: 100 - Sleeve; 110 - First flexible layer; 120 - Rigid layer; 130 - Second flexible layer; 200 - Electrode contact; 300-Waterproof Adhesive; 400 - Ablation fiber; 410 - Output end; 500 - Flexible circuit board; 510 - Solder joint; 600 - Electrode connector; 700 - Channel structure; 800 - Sealing assembly; 131 - Channel; 132 - Fixing part; 1321 - First groove; 133 - Moving part; 1331 - Second groove; 134 - Conductive ring; 135 - Insulating ring; 138 - Annular guide groove. Detailed Implementation

[0022] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0023] Those skilled in the art will understand that, unless specifically stated otherwise, the terms "described" and "the" as used herein may also include plural forms. It should be further understood that the term "comprising" as used in this application's specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude implementations of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by this art. It should be understood that when we say an element is "connected" or "coupled" to another element, the element may be directly connected or coupled to the other element, or it may mean that the element and the other element are connected through an intermediate element. Furthermore, "connected" or "coupled" as used herein may include wireless connections or wireless coupling. The term "and / or" as used herein refers to at least one of the items defined by the term; for example, "A and / or B" may be implemented as "A," or as "B," or as "A and B."

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0025] The electrode structure and electrode device provided in this application are intended to solve the above-mentioned technical problems in related technologies.

[0026] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0027] This application provides an electrode structure, such as... Figures 1-3 As shown, the electrode structure includes: a sleeve 100, at least one electrode contact 200, at least one first connecting contact point, and an electrode connector.

[0028] The sleeve 100 includes a first rigid section, a flexible transition section and a second rigid section connected sequentially along the axial direction. The flexural modulus of the first rigid section and the second rigid section is greater than that of the flexible transition section.

[0029] At least one electrode contact 200 is disposed on the outer peripheral wall and / or inner peripheral wall at the distal end of the first rigid segment, for acquiring information about the target biological tissue and / or regulating the target biological tissue.

[0030] At least one first contact point is disposed on the outer peripheral wall near the proximal end of the second rigid section and is electrically connected to the electrode contact 200.

[0031] The electrode connector 600 has a connection channel connected to the second rigid section, and at least one second connection point matching the first connection point is provided in the connection channel. The electrode contact 200 is electrically connected to the electrode connector 600 via the first connection point and the second connection point.

[0032] A continuous cavity, consisting of a connecting channel, a first rigid section, a flexible transition section, and a second rigid section, forms a through-electrode structure. This continuous cavity allows for the insertion of interventional instruments and provides guiding and positioning functions. In this embodiment, the cannula 100 is hollow and serves as the insertion channel for the interventional instrument. It is a three-section cannula structure, comprising a first rigid section at each end, a second rigid section, and a flexible transition section in the middle. Appropriate flexural moduli are set according to different positions and functions, ensuring the cannula as a whole possesses suitable flexibility and rigidity during puncture, thus improving puncture efficiency. The cannula 100 is electrically connected to the electrode connector 600 via connecting contact points, allowing for a detachable design and increased structural flexibility. The continuous cavity for the insertion of interventional instruments integrates the internal channel of the cannula 100 and the connecting channel of the electrode connector 600, enabling a compact structural layout and reducing redundant design. Furthermore, the continuous cavity, as the insertion channel for interventional instruments, enriches the functionality of the electrode device. By utilizing the cannula 100 and the interventional instrument in synergy, it provides multiple possible solutions for the ablation of target biological tissues. Moreover, the elimination of the need to repeatedly implant other electrode probes within the cannula 100 reduces operational complexity and thus improves ablation efficiency.

[0033] In this embodiment, the electrode structure has an electrode connector 600, which can simultaneously / at any time monitor EEG signals while other interventional devices are in operation or when the current operation ends.

[0034] In this embodiment, the main body of the electrode structure has varying hardness along the axial direction. The first rigid section has good hardness for easy penetration into tissues, while the flexible transition section is convenient for fixing to the skull. It can conform to the complex curved paths of biological cavities such as blood vessels and digestive tracts, reducing the risk of tissue damage. The second rigid section has hardness to ensure the diameter of the continuous cavity after connection with the electrode connector 600, so as to facilitate the insertion of interventional devices. The design of different hardness can significantly improve the operational flexibility of the electrode.

[0035] Considering the relatively small diameter of the electrodes, the intraoperative grasping and insertion of interventional instruments are relatively difficult. In this embodiment, the addition of an electrode connector 600 can improve this problem.

[0036] It should be noted that in the embodiments of this application, the proximal end is the end closer to the operator, and the distal end is the end farther away from the operator, that is, the end that extends into the target biological tissue.

[0037] Optionally, the target biological tissue may include brain tissue that needs to be ablated by an ablation fiber in the interventional device or modulated by an electrode contact 200.

[0038] Optionally, information about the target biological tissue can be acquired, including: acquiring location information, image information, and abnormal information of the target biological tissue, and feeding this information back to the control system so that the operator is aware of the location information, image information, or abnormal information of the target biological tissue. For example, electrode contacts 200 can be used to detect brain waves, locate the lesion, and thus acquire the location information of the target biological tissue. Alternatively, abnormal signals in the brain can be monitored by acquiring abnormal information. Regulation of the target biological tissue includes: stimulating the target biological tissue, performing thermocoagulation on the target biological tissue, and other operations.

[0039] Specifically, electrical stimulation directly alters the membrane potential of neurons by inputting stimulation pulse signals, triggering action potentials and thus exciting the neurons. External devices such as electrical stimulators or deep brain stimulators (DBS) are typically used to generate and control the intensity, frequency, and duration of the stimulation pulse signals. During use, electrode structures are implanted into specific neural structures or tissues, and then stimulation pulse signals (e.g., electrical stimulation) are applied through external devices. The parameters of the stimulation pulse signals (such as current intensity, frequency, and duration) can be adjusted as needed. It is suitable for the treatment of various neurological disorders, such as epilepsy, Parkinson's disease, and dystonia. Furthermore, electrical stimulation can also be used to promote nerve regeneration and repair damaged tissue.

[0040] Optionally, in the embodiments of this application, the thermal coagulation / ablation operation may include at least one of the following methods: 1. Each electrode contact 200 releases current, which acts on the lesion area to achieve a thermal coagulation effect.

[0041] 2. The laser emitted from the fiber optic catheter inserted within the cannula 100 thermally coagulates the target tissue in the lesion area. Generally speaking, the fiber optic catheter thermal coagulation method has a larger coagulation range and is more efficient than the electrode contact 200 thermal coagulation method.

[0042] Specifically, thermocoagulation utilizes the high-frequency oscillating energy generated by radiofrequency current. This energy, through friction between the electrode structure and ions in the tissue, generates heat, raising the local temperature and causing tissue coagulation and necrosis. It primarily uses external devices such as radiofrequency devices or high-frequency electrosurgical units to generate radiofrequency current (high-frequency current), which is then conducted to the target biological tissue through the electrode structure. Typically, electrodes or needle-like electrodes are inserted through the skin to conduct the high-frequency current to the target tissue. During the procedure, the doctor adjusts the current intensity and duration based on feedback from the tissue's resistance and temperature. It is mainly used to treat painful conditions such as trigeminal neuralgia and sciatica. In addition, thermocoagulation can also be used for hemostasis, tissue cutting, and ablation in surgical procedures. Optionally, the number of electrode contacts 200 can be multiple, such as 8, 10, 12, 14, 16, or 18.

[0043] Optionally, the electrode contact 200 can be annular or semi-annular and circumferentially arranged around the outside of the sleeve 100.

[0044] In some possible embodiments, such as Figure 3 As shown, the flexible circuit board 500 is attached to the wall of the sleeve 100. The flexible circuit board 500 has multiple solder points 510, and multiple electrode contacts 200 are soldered to each solder point 510 in a corresponding manner.

[0045] Optionally, the thickness of the flexible circuit board 500 is between 0.05 mm and 1 mm (inclusive).

[0046] In some possible embodiments, such as Figure 3 As shown, the electrode structure also includes a waterproof adhesive 300. The waterproof adhesive 300 covers the exposed surface of the flexible circuit board 500, protecting the flexible circuit board 500 and improving the circuit reliability of the electrode structure.

[0047] In its first state, the interventional device enters the axial passage through an opening communicating with the outside. To this end, the present application also provides the following embodiments.

[0048] In some possible embodiments, the electrode connector 600 is connected to the second rigid segment in a non-detachable manner.

[0049] In this embodiment, the electrode connector 600 is fixedly connected to the second rigid segment and cannot be disassembled. As an integral structure, it can improve the stability of the continuous cavity. For example, the channel of the electrode connector is at least partially fixedly and inseparably connected to the second rigid segment in the form of a socket or a butt joint to achieve electrical connection. Further, if it is a socket joint, the electrical connection between the second rigid segment and the electrode connector 600 can be that the proximal end of the second rigid segment is provided with a connection contact point that corresponds one-to-one with the channel; if it is a butt joint, the proximal opening of the second rigid segment and the channel are fixedly connected in a relatively aligned manner or in a partially overlapping manner, and the guide wire in the second rigid segment is connected to the electrical control unit of the electrode connector 600 to achieve electrical connection.

[0050] In some possible embodiments, the electrode connector 600 is detachably connected to the second rigid segment.

[0051] In this embodiment, the electrode connector 600 is detachably connected to the second rigid segment. As a separate structure, it allows for the adjustment of different specifications of the electrode connector 600 and the sleeve 100 according to actual conditions, providing greater flexibility. The electrode connector 600 and the sleeve 100 can be detachably connected: for example, the channel of the electrode connector 600 is at least partially electrically connected to the second rigid segment in the form of a socket or butt joint; the detachable method can be that the proximal end of the second rigid segment is inserted into the channel, or the electrode connector 600 is connected to the second rigid segment in an open / closed manner, or in other threaded forms.

[0052] In some possible embodiments, the flexural modulus of the first rigid segment is less than that of the second rigid segment.

[0053] In this embodiment, the flexural modulus of the first rigid segment is less than that of the second rigid segment but greater than that of the transition segment. This allows the first rigid segment to have a certain degree of rigidity to guide the implantation of the target tissue as the tip, while also having a certain degree of flexibility. This reduces the mechanical stress during implantation and thus reduces damage to the target tissue.

[0054] In its second state, the opening is located inside the electrode connector and cannot communicate with the outside. To achieve insertion of the interventional device in this state, the present application also provides the following embodiments: 1. The electrode connector 600 and the second rigid section are separable. Furthermore, the second rigid section can be removed from the electrode connector 600, and the interventional instrument is inserted from the proximal end of the second rigid section. The separability is not limited to the opening and closing type, the insertion and removal type, the threaded type, etc.

[0055] 2. The electrode connector 600 and the second rigid segment can also be inseparable. For example, the electrode connector 600 is in an open-closed form, and at least a portion of the lower half of the channel of the electrode connector 600 is fixedly connected to the proximal end of the second rigid segment. The proximal opening of the second rigid segment and the opening of the electrode connector 600 are a certain distance apart. If the interventional device has a certain degree of flexibility, the interventional device can be inserted through it.

[0056] Optionally, in one embodiment of this application, such as Figure 11 As shown, the electrode connector 600 includes a fixed part 132 and a movable part 133.

[0057] The fixed part 132 is rotatably connected to the movable part 133. The fixed part 132 is provided with a first groove 1321, and the movable part 133 is provided with a corresponding second groove 1331. When the movable part 133 rotates to the point where the opening angle relative to the fixed part 132 is zero, the first groove 1321 and the second groove 1331 form a channel 131.

[0058] The first groove 1321 is provided with a plurality of conductive rings 134 and a plurality of insulating rings 135; along the extension 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.

[0059] In this embodiment, the movable part 133 and the fixed part 132 of the electrode connector 600 can be connected together by a rotating shaft. The opening and closing angle of the movable part 133 relative to the fixed part 132 includes 0-90°. When the movable part 133 rotates to an opening and closing angle of zero relative to the fixed part 132, the movable part 133 and the fixed part 132 are in a closed state. The first groove 1321 and the second groove 1331 form a channel 131, which is connected to the first support tube 11. At this time, the interventional instrument 2 can enter the first support tube 11 through the channel 131, so that the interventional instrument 2, such as the ablation fiber, can be used in subsequent laser ablation surgery. When the opening and closing angle of the movable part 133 relative to the fixed part 132 is greater than zero, the movable part 133 and the fixed part 132 are in an open state. At this time, the first support tube 11 can be installed in the channel 131 or removed from the channel 131.

[0060] In this embodiment, the second groove 1331 is provided with a plurality of conductive rings 134 and a plurality of insulating rings 135; the plurality of conductive rings 134 and the plurality of insulating rings 135 are alternately arranged along the extending direction of the second groove 1331; the conductive rings 134 and the insulating rings 135 each extend circumferentially along the second groove 1331. When the movable part 133 rotates to the point where the opening angle relative to the fixed part 132 is zero, 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-to-one with the plurality of conductive rings 134 and the plurality of insulating rings 135 in the second groove 1331, such that the conductive rings 134 and the insulating rings 135 each extend circumferentially along the channel 131. The conductive rings 134 are made of materials such as metal and are used for conducting electricity; the insulating rings 135 are made of materials such as silicone and are used for sealing and isolating adjacent conductive rings 134. The electrical control unit in the electrode connector 600 is electrically connected to multiple conductive rings 134 in the first slot 1321 and multiple conductive rings 134 in the second slot 1331. It should be noted that, in this application, conductive rings 134 and insulating rings 135 may be provided only in the first slot 1321, and conductive rings 134 and insulating rings 135 may not be provided in the second slot 1331.

[0061] Optionally, in one embodiment of this application, such as Figure 11-12As shown, the first groove 1321 and the second groove 1331 are provided with annular guide grooves 138, and multiple conductive rings 134 and multiple insulating rings 135 are slidably disposed in the annular guide grooves 138 of the first groove 1321 and the second groove 1331.

[0062] In the embodiments of this application, such as Figure 11-12 As shown, multiple conductive rings 134 and insulating rings 135 are slidably embedded in the annular guide groove 138 formed by the first groove 1321 and the second groove 1331. For example, by means of snap-fit ​​connection, interference fit, or mounting, the electrode connector 600 has dynamic adaptation capability. By adjusting the axial distance between the conductive rings 134 and the insulating rings 135, the spacing specification of the near-end contact of the first support tube 11 can be matched, thereby realizing rapid adaptation with electrode modules of different contact specifications.

[0063] In some possible embodiments, such as Figure 1 As shown, the distal end of the first rigid segment is closed.

[0064] In this embodiment, the distal end of the first rigid segment is closed, which can be directly used as the puncture end, thereby improving the convenience of puncture.

[0065] In some possible embodiments, the distal end of the first rigid segment is at least partially open.

[0066] In this embodiment, the distal end of the first rigid segment is at least partially open, which allows the distal end of the interventional device to extend beyond the distal end of the first rigid segment when the distal end of the first rigid segment approaches the target biological tissue, so as to continue short-distance puncture and reach the target biological tissue with a relatively complex structure, thereby minimizing the damage to the target biological tissue by the cannula 100.

[0067] like Figure 4 and Figure 8 As shown, the distal end of the first rigid section is open, which facilitates the insertion of interventional instruments (such as ablation fiber 400) through the distal end of the cannula 100.

[0068] In some possible embodiments, such as Figure 5 As shown, the electrode structure also includes at least one channel structure 700.

[0069] The channel structure 700 is open at both ends and hollow, and is installed inside the sleeve 100.

[0070] The inlet of the channel structure 700 is located at the proximal opening of the second rigid section, and the outlet of the channel structure 700 is located at at least one of the distal opening of the second rigid section and the distal outer peripheral wall. The outlet of the channel structure 700 is offset from the position of the electrode contact 200.

[0071] The channel structure 700 allows interventional instruments to pass through.

[0072] In this embodiment, the cannula 100 has multiple independent channel structures 700 inside, each of which can allow one or more interventional devices to pass through, enabling the distal end of the interventional device to reach the target biological tissue for corresponding ablation and other treatments. The channels of the multiple interventional devices are independent and do not interfere with each other, improving the reliability of the interventional devices. Furthermore, the non-interference channel design allows each interventional device to accurately maintain its own functional parameters, preventing functional disorders due to abnormal fluctuations of adjacent interventional devices, thus providing dual protection for the accuracy and safety of medical procedures.

[0073] In some possible embodiments, such as Figure 1 As shown, the electrode contacts 200 include at least two, spaced apart on the outer peripheral wall of the distal end of the first rigid segment.

[0074] The outlet of the channel structure 700 is located between adjacent electrode contacts 200 on the distal outer peripheral wall of the first rigid section.

[0075] In this embodiment, multiple electrode contacts 200 are arranged circumferentially on the outer peripheral wall of the distal end of the first rigid segment, acquiring and analyzing information from each other to obtain information about the target biological tissue. The outlet of the channel structure 700 is located between adjacent electrode contacts 200, offset from the electrode contacts 200, and does not interfere with each other.

[0076] Optionally, the interventional device includes an ablation fiber 400, and the ablation fibers 400 inserted within at least two channel structures 700 are of different types. For example, one ablation fiber 400 uses a 980 nm semiconductor laser, capable of generating high-power laser light, and the laser unit itself has heat dissipation capabilities to ensure stable output over a long period. Another ablation fiber 400 uses a 1064 nm Nd:YAG (yttrium doped aluminum oxide laser crystal material) laser, capable of generating high-power laser light. Other lasers can also generate other forms of laser light, which are not limited here.

[0077] In some possible embodiments, such as Figure 5 As shown, the electrode structure also includes a sealing component 800.

[0078] The occlusion component 800 is flexible, with its outer peripheral wall fixedly connected to the inner peripheral wall at the distal end of the channel structure 700. It is configured to deform when the interventional instrument passes through to open the outlet of the channel structure 700 and to block the outlet of the channel structure 700 without the action of external force.

[0079] In this embodiment, the occlusion component 800 can seal the distal opening of the channel structure 700 without external force, preventing foreign objects from entering the channel structure 700 when it is not in use, thus avoiding blockage and preventing the channel structure 700 from interfering with normal puncture operations. When the interventional instrument passes through, the occlusion component 800 can deform under the action of the distal end of the interventional instrument, opening the outlet of the channel structure 700 and allowing the distal end of the interventional instrument to pass through for corresponding ablation and other operations.

[0080] In some possible embodiments, the electrode structure further includes a temperature-sensing resistor (not shown) disposed on the outer peripheral wall of the distal end of the first rigid segment.

[0081] In this embodiment, the distal end of the sleeve 100 is open, and the temperature measuring resistor can be set on the outer peripheral wall of the distal end of the first rigid section to perform temperature measurement on the target biological tissue in contact with the outer peripheral wall of the first rigid section.

[0082] In some possible embodiments, the electrode structure further includes a temperature-sensing resistor disposed on the closed outer end face of the distal end of the first rigid segment.

[0083] In this embodiment, the distal end of the first rigid segment is closed, and the temperature measuring resistor can be set on the closed outer end face of the distal end of the first rigid segment to perform temperature measurement on the target biological tissue that comes into contact with when the distal end of the first rigid segment is punctured.

[0084] Optionally, the temperature sensing resistor can share a circuit with the electrode contact 200 and be controlled separately, which can simplify the circuit structure.

[0085] In some possible embodiments, the electrode structure also includes a temperature-sensing optical fiber (not shown in the figure), which is embedded in the outer peripheral wall of the sleeve 100 and extends along the axial direction of the sleeve 100, with the monitoring end 410 of the temperature-sensing optical fiber fixed to the distal end of the first rigid segment.

[0086] In this embodiment, the temperature-sensing optical fiber is embedded and fixed axially to the outer peripheral wall of the sheath 100, allowing it to be inserted into the body synchronously with the sheath 100, reaching the target biological tissue at its distal end for temperature measurement. Furthermore, the temperature-sensing optical fiber does not occupy space along the radial direction of the sheath 100, ensuring the normal puncture operation of the sheath 100.

[0087] In some possible embodiments, the temperature sensing resistor is disposed on the outer peripheral wall at the distal end of the first rigid segment, between adjacent electrode contacts 200.

[0088] In this embodiment, adjacent electrode contacts 200 can perform thermal condensation operation. The temperature measuring resistor can obtain temperature information between the two thermal condensation points and process the information to make the measured temperature closer to the temperature of the thermal condensation center, thereby making the temperature measurement more accurate.

[0089] In some possible embodiments, the monitoring end 410 of the temperature-sensing optical fiber is located between adjacent electrode contacts 200.

[0090] In this embodiment, adjacent electrode contacts 200 can perform thermal condensation operation. The temperature measuring resistor can obtain temperature information between the two thermal condensation points and process the information to make the measured temperature closer to the temperature of the thermal condensation center, thereby making the temperature measurement more accurate.

[0091] In some possible embodiments, the electrode contacts 200 are arranged in a ring shape, spaced sequentially along the axial direction of the sleeve 100. Between adjacent electrode contacts 200, along the circumference of the sleeve 100, the outlet positions of the temperature sensing resistors and the channel structure are spaced apart, without interfering with each other. Furthermore, there is a certain length space between adjacent electrode contacts 200, and the exit end 410 of the ablation fiber 400 also has a certain length, capable of corresponding to the length space between multiple adjacent electrode contacts 200. The ablation position of the ablation fiber 400 can be adjusted by adjusting its insertion position.

[0092] In some embodiments, such as Figure 6 As shown, at least one of the first rigid segment and the second rigid segment has a three-layer structure, including a first flexible layer 110, a rigid layer 120, and a second flexible layer 130. The first flexible layer 110 is used to contact the interventional instrument, and the second flexible layer 130 is used to contact biological tissue during puncture.

[0093] In this embodiment, the cannula 100 has at least a three-layer structure: a soft first flexible layer 110, a second flexible layer 130, and a rigid layer 120 sandwiched between them. The first flexible layer 110 is the inner layer, which acts as a buffer when the interventional instrument enters the cannula 100, preventing damage from friction or impact with the cannula 100 wall during insertion. The rigid layer 120 is the middle layer, ensuring the cannula 100 has the rigidity required for implantation into the target biological tissue, facilitating a smooth puncture process. The second flexible layer 130 is the outer layer, which reduces friction between the cannula 100 and the biological tissue during puncture, minimizing damage to the tissue along the puncture path. Furthermore, the second flexible layer 130 has better biocompatibility, allowing for long-term implantation in the target tissue. Therefore, the cannula 100 provided in this embodiment improves the reliability of the electrode structure, increases puncture efficiency, and reduces puncture damage.

[0094] However, the flexible transition section mainly serves as a transition, with guidance as a secondary function, and its specific structure can differ from that of the first rigid section and the second rigid section.

[0095] Optionally, the electrode structure is made of magnetically compatible materials, which facilitates magnetic resonance imaging examinations.

[0096] In some possible embodiments, at least one electrode contact 200 is disposed on the distal inner peripheral wall of the first flexible layer 110.

[0097] In this embodiment, the electrode contact 200 is integrated into the distal inner peripheral wall of the first flexible layer 110. During the process of the sleeve 100 being inserted into the target biological tissue, it arrives at the target biological tissue synchronously with the first flexible layer 110, thereby performing operations such as obtaining information about the target biological tissue and performing heat treatment on the target biological tissue.

[0098] Specifically, during the puncture process, some biological tissue may enter the distal opening of the cannula 100. The relevant operations are performed on the target biological tissue that may enter during the puncture process at the opening of the cannula 100, such as obtaining information about the target biological tissue and performing heat treatment on the target biological tissue.

[0099] Optionally, the target biological tissue may be subjected to heat treatment, including operations such as stimulating the target biological tissue or thermally coagulating the target biological tissue.

[0100] In some possible embodiments, such as Figure 6 As shown, at least one electrode contact 200 is disposed on the distal outer peripheral wall of the second flexible layer 130.

[0101] In this embodiment, the electrode contact 200 is disposed on the distal outer peripheral wall of the second flexible layer 130, and contacts the target biological tissue, thereby obtaining information about the target biological tissue and performing heat treatment on the target biological tissue.

[0102] In some possible embodiments, such as Figure 6 As shown, there are at least two electrode contacts 200, which are arranged along the axial spacing of the sleeve 100 on the first flexible layer 110 or the second flexible layer 130. The information acquired by the multiple electrode contacts 200 can be analyzed and processed to obtain the specific location information or other information of the target biological tissue.

[0103] In some possible embodiments, the temperature sensing resistor is disposed on the distal inner peripheral wall of the first flexible layer 110.

[0104] In this embodiment, a temperature-sensing resistor is disposed on the distal inner peripheral wall of the first flexible layer 110 to perform temperature measurement on the target biological tissue that may enter at the opening of the cannula 100 during puncture.

[0105] In some possible embodiments, the temperature sensing resistor is disposed on the distal outer peripheral wall of the second flexible layer 130.

[0106] In this embodiment, the temperature-sensing resistor is disposed on the distal outer peripheral wall of the second flexible layer 130, in contact with the target biological tissue, thereby performing temperature measurement on the target biological tissue.

[0107] In some possible embodiments, the temperature-sensing optical fiber is embedded in the outer peripheral wall of the second flexible layer 130 and extends along the axial direction of the sleeve 100, with the monitoring end 410 of the temperature-sensing optical fiber fixed to the distal end of the second flexible layer 130.

[0108] In this embodiment, the temperature-sensing optical fiber is embedded and fixed axially to the outer peripheral wall of the second flexible layer 130, enabling it to be inserted into the body synchronously with the cannula 100, reaching the target biological tissue at its distal end for temperature measurement. Furthermore, the temperature-sensing optical fiber does not occupy space along the radial direction of the cannula 100, ensuring the normal puncture operation of the cannula 100.

[0109] Furthermore, using optical fiber for temperature measurement allows for better matching of the internal space of the sleeve 100, and facilitates installation and insertion into the target biological tissue. Additionally, the temperature-measuring optical fiber and the ablation optical fiber 400 share similar communication principles, facilitating information exchange with the control host.

[0110] In some possible embodiments, the interventional device includes an image acquisition unit with its image acquisition end facing the lesion area.

[0111] In this embodiment, the image acquisition device has a device for acquiring images of the target tissue, such as a miniature camera. The acquisition device is oriented towards the lesion area and transmits the acquired image information to the human-computer interaction interface and displays it to the operator. This allows the operator or computer program to monitor the image of the target tissue in real time and determine whether the ablation has been completed, which helps to improve the efficiency and accuracy of ablation.

[0112] Based on the same inventive concept, embodiments of this application also provide an electrode device, including an interventional instrument and an electrode structure as provided in any of the above embodiments.

[0113] like Figure 7 or Figure 8 As shown, the interventional device is inserted into the continuous cavity of the electrode structure.

[0114] In this embodiment, the electrode structure is similar to that in the previous embodiments and will not be described again. The cannula 100 in this embodiment is hollow, serving as the insertion channel for the interventional device. It has a three-section cannula structure, including a first rigid section at each end, a second rigid section, and a flexible transition section in the middle. Appropriate flexural modulus is set according to different positions and functions, ensuring the cannula as a whole has suitable flexibility and rigidity during puncture, improving puncture efficiency. The cannula 100 and the electrode connector 600 are electrically connected via contact points, allowing for a detachable design and increased structural flexibility. The continuous cavity for insertion of the interventional device integrates the internal channel of the cannula 100 and the connection channel of the electrode connector 600, enabling a compact structural layout and reducing redundant design. Furthermore, the continuous cavity, as the insertion channel for the interventional device, enriches the functionality of the electrode device. The coordinated operation of the cannula 100 and the interventional device provides multiple possible solutions for the ablation of target biological tissues. Moreover, the need to repeatedly implant other electrode probes within the cannula 100 reduces operational complexity and thus improves ablation efficiency.

[0115] The working principle of this application embodiment includes: Multiple suspicious areas exist within biological tissue. Electrode structures can be implanted in these suspicious areas to collect and process information, such as collecting and detecting electroencephalograms (EEGs). The specific location of the lesion area is then determined through comprehensive analysis of the information fed back from multiple electrode structures. If a clear lesion target is known, an appropriate treatment plan can be selected based on the nature (shape, size, etc.) of the lesion area. For example, if the lesion area is small, a 200mm thermal coagulation loss electrode contact can be used.

[0116] If the lesion area is large, considering that the area to be ablated by electrode thermocoagulation is relatively small and difficult to completely cover, related techniques require secondary surgery, i.e., other procedures to treat the lesion area. This may require another minimally invasive procedure, which is complex, inefficient, and increases the risk of infection. However, in the embodiments of this application, the ablation fiber 400 can pass through the cannula 100 to reach the lesion area for laser ablation, eliminating the need for secondary surgery. The operation is simple and efficient, requires no additional incision, and reduces the risk of infection.

[0117] Furthermore, during laser ablation treatment using the ablation fiber 400, the appropriate specification of the laser ablation fiber 400 can be selected based on the characteristics of the target biological tissue. The ablation fiber 400 is available in different specifications based on the length of the fiber output end 410 (or diffusion end), such as 4 mm, 10 mm, or 15 mm. During laser ablation, light is emitted from the gaps between the various electrode contacts 200 and absorbed by the target biological tissue, thus achieving ablation.

[0118] Additionally, when the target biological tissue is elongated, ablation can be performed using a needle retraction method. Specifically, if a closed sleeve 100 is used, after ablation of a portion of the target biological tissue, the sleeve 100 and the ablation fiber 400 are simultaneously retracted a certain distance to continue ablation, thereby completely ablating the elongated target biological tissue. If an open sleeve 100 is used, the sleeve 100 can be retracted while the ablation fiber 400 remains stationary, allowing the target biological tissue to be fully exposed at the output end 410 of the ablation fiber 400, resulting in more thorough ablation and reducing ablation time. Alternatively, the sleeve 100 can be fixed in place while the ablation fiber 400 is retracted independently, depending on the specific circumstances.

[0119] In some possible embodiments, the interventional device includes at least one of: ablation fiber 400, temperature sensing fiber, electrode structure, navigation needle, and mandrel.

[0120] In this embodiment, the ablation fiber 400 can perform ablation operations on the target biological tissue, and the temperature-measuring fiber can perform temperature measurement operations on the target biological tissue. Among the electrode structures of different sizes, one electrode structure can be fitted into the cannula 100 of another electrode structure for segmented puncture operations, which can reduce the difficulty of puncture and improve the adaptability to complex puncture paths. For example, a smaller diameter electrode structure can be used to puncture deep into the brain, reducing damage and achieving a deeper puncture depth. Alternatively, a navigation needle can be used to guide the electrode structure into the target biological tissue.

[0121] Optionally, such as Figure 9 and Figure 10 As shown, the electrode device also includes an electrode connector 600 for connecting to other devices to transmit EEG signals to an EEG machine for corresponding information processing.

[0122] Optionally, overheating may occur during the laser transmission process of the ablation fiber 400, requiring cooling. A tubular structure can be installed outside the sleeve 100 to form a cooling circuit between the sleeve 100 and the tubular structure, which is connected to a cooler for the flow of cooling medium, thereby achieving the effect of cooling the ablation fiber 400.

[0123] Optionally, the two channel structures 700 can be connected to form a cooling circuit for the flow of cooling medium, thereby cooling the ablation fiber 400. This embodiment only requires one sleeve 100, which can improve the space utilization inside the sleeve 100 and reduce the radial dimension of the sleeve 100 to a certain extent, thereby reducing the wound area, bleeding volume, or infection risk during the ablation process.

[0124] Optionally, the electrode device is also connected to external devices and a control host. The external devices can receive the user's digital image information. The control host can complete patient registration and 3D modeling based on the digital image information provided by the magnetic resonance imaging equipment, and perform multimodal 3D modeling based on the digital image information to obtain the user's 3D model.

[0125] Optionally, the digital image information can be manually entered or acquired by the camera device and transmitted to the control host.

[0126] Alternatively, the three-dimensional model can be obtained based on images measured by computed tomography or nuclear magnetic resonance.

[0127] Optionally, the interventional device provided in this application embodiment can acquire real-time temperature information and obtain a three-dimensional temperature cloud map based on a three-dimensional model. Furthermore, the real-time temperature information can be output to external devices, and the three-dimensional temperature cloud map can be displayed in real-time using a human-machine interface, helping technicians performing ablation to obtain real-time temperature information of the lesion area and reducing the risks associated with ablation. Moreover, when technicians judge the ablation results through the temperature display, the three-dimensional display helps them view the ablation results from all directions, rather than just the results in the scanning direction, making the judgment of ablation results more accurate.

[0128] Optionally, real-time temperature information can be acquired using the following techniques. For example, parallel scanning technology, stereoscopic scanning technology, or thin-slice scanning technology can be used to acquire real-time temperature information.

[0129] Optionally, external devices include magnetic resonance imaging equipment, human-computer interaction interfaces, power modules, and other peripheral interfaces.

[0130] Optionally, the control host can control the laser, cooler, and electrode device based on the information fed back from the human-machine interface, control the generation and power adjustment of various lasers, and drive and control the cooler to control the temperature of the ablation fiber 130.

[0131] Optionally, the human-machine interface is used in conjunction with the control host, employing a combination of two 24-inch touchscreen displays, one 10-inch touchscreen display, physical buttons, and indicator lights. It also provides input methods such as touchscreen, mouse, keyboard, and physical knob. The emergency stop control switch can disable various functional components, but will not disable the human-machine interface.

[0132] Optionally, to improve the stability and safety of the system, the control interface of the laser and cooler is equipped with two sets of foot switches to control the laser emission. If one set fails, the other set can be used for control.

[0133] Optionally, water cooling can be used in this embodiment. This provides a stable cold source, good performance, and low manufacturing cost. The structure includes a peristaltic pump, a coolant tank, a waste liquid tank, cooling pipes, and coolant. A single-channel system can be used to prevent contamination from backflow. The coolant tank is equipped with a heater, a temperature sensor, and a solution sensor. When the cooling assembly is working, the heating module heats the coolant in the tank to a suitable temperature, which is detected by the temperature sensor. The peristaltic pump then starts working, delivering the coolant to the laser ablation device to form a cooling loop. The coolant then flows through a return pipe into a waste liquid bottle, where a flow sensor confirms normal coolant backflow. The solution sensor in the coolant tank detects the solution level; if the solution is insufficient, an alarm signal is issued requesting coolant replacement.

[0134] Optionally, other peripheral interfaces include, but are not limited to, USB (Universal Serial Bus) interfaces, safety switch interfaces, network cables, optical drives, etc.

[0135] Optionally, the electrode device can be fixed to the patient's skull by a fixing component, which is used to fix and guide the cannula 100 of the electrode device so that the cannula 100 can accurately reach the lesion location.

[0136] Regarding the fixation assembly, it has at least one structure fixed to the skull, preferably a hollow cranial screw, which serves both fixation and guiding functions. The cranial screw has self-tapping threads for fastening to the skull. Then, the entire sleeve 100 fixation assembly is attached to the cranial screw to maintain a fixed position relative to the patient's skull. The hollow inner hole on the cranial screw and the position adjustment structure form a guiding passage for the insertion and orientation of the sleeve 100.

[0137] Optionally, the external device may include an electroencephalograph (EEG) machine, which is used to receive and display the biological information of the target biological tissue acquired by the electrode contacts 200.

[0138] The external device may also include a signal generator, used to receive a first control signal from the controller, generate an electrical signal based on the first control signal, and transmit the electrical signal to the electrode contact 200; or, used to receive biological information of the target biological tissue acquired by the electrode contact 200, generate an electrical signal based on the biological information of the target biological tissue, and transmit it to the electrode contact 200. The electrode contact 200 applies the electrical signal to the target biological tissue to regulate the target biological tissue. The electrical signal may be a stimulation pulse signal or a radio frequency current.

[0139] By applying the embodiments of this application, at least the following beneficial effects can be achieved: 1. In this embodiment, the cannula 100 is hollow and serves as the insertion channel for the interventional device. It has a three-section structure, including a first rigid section at each end, a second rigid section, and a flexible transition section in the middle. Appropriate flexural moduli are set according to different positions and functions, ensuring the cannula as a whole possesses suitable flexibility and rigidity during puncture, thus improving puncture efficiency. The cannula 100 is electrically connected to the electrode connector 600 via connecting contact points, allowing for a detachable design and increased structural flexibility. The continuous cavity for insertion of the interventional device integrates the internal channel of the cannula 100 and the connection channel of the electrode connector 600, enabling a compact structural layout and reducing redundant design. Furthermore, the continuous cavity, as the insertion channel for the interventional device, enriches the functionality of the electrode device. Utilizing the synergistic work of the cannula 100 and the interventional device, it provides multiple possible ablation methods for the target biological tissue. Moreover, it eliminates the need for repeated implantation of other electrode probes within the cannula 100, reducing operational complexity and thereby improving ablation efficiency.

[0140] 2. The distal end of the first rigid segment is partially open, so that when the distal end of the first rigid segment approaches the target biological tissue, the distal end of the interventional instrument extends beyond the distal end of the first rigid segment to continue short-distance puncture and reach the target biological tissue with a more complex structure, thereby minimizing the damage to the target biological tissue caused by the first rigid segment.

[0141] 3. The cannula 100 has multiple independent channel structures inside, each of which can allow one or more interventional instruments to pass through, enabling the distal end of the interventional instrument to reach the target biological tissue for appropriate ablation and other treatments. The channels of multiple interventional instruments are independent of each other and do not interfere with each other, which can improve the reliability of interventional instruments.

[0142] 4. Multiple electrode contacts 200 are arranged circumferentially on the outer peripheral wall of the distal end of the first rigid section, acquiring and analyzing information from each other to obtain information about the target biological tissue. The outlet of the channel structure is located between adjacent electrode contacts 200, offset from the electrode contacts 200, and does not interfere with each other.

[0143] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0144] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. An electrode structure, characterized in that, include: The sleeve comprises a first rigid segment, a flexible transition segment, and a second rigid segment connected sequentially along the axial direction. The flexural modulus of the first rigid segment and the second rigid segment is greater than that of the flexible transition segment, and the flexural modulus of the first rigid segment is less than that of the second rigid segment. At least one electrode contact is disposed on the outer peripheral wall and / or inner peripheral wall at the distal end of the first rigid segment for acquiring information about the target biological tissue and / or regulating the target biological tissue. At least one first contact point is disposed on the outer peripheral wall near the proximal end of the second rigid segment and is electrically connected to the electrode contact point; An electrode connector has a connection channel connected to a second rigid segment. At least one second connection point matching the first connection point is provided within the connection channel. The electrode contact is electrically connected to the electrode connector via the first and second connection points. The electrode connector is connected to the second rigid segment via a non-detachable or detachable connection. The electrode connector includes a fixed portion and a movable portion rotatably connected to each other. The fixed portion has a first groove, and the movable portion has a corresponding second groove. When the movable portion rotates to an opening angle of zero relative to the fixed portion, the first and second grooves form a channel, and the proximal end of the second rigid segment is inserted into the channel. At least one channel structure, open at both ends and hollow, is inserted inside the sheath; the entrance of the channel structure is located at the proximal opening of the second rigid segment, and the exit of the channel structure is located at at least one of the distal opening of the first rigid segment and the distal outer peripheral wall; the exit of the channel structure is offset from the position of the electrode contact; the channel structure allows interventional instruments to pass through. The connecting channel, the first rigid section, the flexible transition section, and the second rigid section form a continuous cavity that runs through the electrode structure. The continuous cavity allows interventional instruments to be inserted and has a guiding and positioning function.

2. The electrode structure according to claim 1, characterized in that, At least one of the first rigid segment and the second rigid segment has a three-layer structure, comprising a first flexible layer, a rigid layer, and a second flexible layer; The first flexible layer is used to contact the interventional device, and the second flexible layer is used to contact biological tissue during puncture.

3. The electrode structure according to claim 1, characterized in that, The distal end of the first rigid segment is closed or at least partially open.

4. The electrode structure according to claim 1, characterized in that, The electrode contacts include at least two, spaced apart on the outer peripheral wall of the distal end of the first rigid segment; The outlet of the channel structure is located between adjacent electrode contacts on the distal outer peripheral wall of the first rigid segment.

5. The electrode structure according to claim 1, characterized in that, The electrode structure further includes: The occlusion assembly is flexible, with its outer peripheral wall fixedly connected to the inner peripheral wall at the distal end of the channel structure. It is configured to deform to open the outlet of the channel structure when the interventional instrument passes through, and to seal the outlet of the channel structure without the action of external force.

6. The electrode structure according to claim 1, characterized in that, The electrode structure further includes at least one of the following: A temperature-sensing resistor is disposed on the outer peripheral wall at the distal end of the first rigid section; A temperature-sensing resistor is disposed on the closed outer end face of the far end of the first rigid segment; A temperature-sensing optical fiber is embedded in the outer peripheral wall of the sleeve and extends along the axial direction of the sleeve. The monitoring end of the temperature-sensing optical fiber is fixed to the far end of the first rigid section.

7. The electrode structure according to claim 6, characterized in that, The temperature measuring resistor is disposed on the outer peripheral wall at the far end of the first rigid section, between adjacent electrode contacts.

8. The electrode structure according to claim 6, characterized in that, The monitoring end of the temperature-measuring optical fiber is located between adjacent electrode contacts.

9. An electrode device, characterized in that, Includes interventional devices and electrode structures as described in any one of claims 1-8; The interventional device is inserted into the continuous cavity of the electrode structure.

10. The electrode device according to claim 9, characterized in that, The interventional device includes at least one of the following: ablation fiber, temperature measuring fiber, electrode structure, navigation needle, and mandrel.

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