Direction marking electrode and stimulation system

Abstract

The invention belongs to the technical field of medical instruments, and discloses a direction identification electrode and a stimulation system. The direction identification electrode comprises a stimulation section and a guide wire. The stimulation section comprises a wire main body and at least one group of stimulation structures, the stimulation structures are arranged on the wire main body and located between the head and the tail of the stimulation section, each stimulation structure comprises a plurality of stimulation sheets which are arranged at intervals and are insulated from one another, the head of the stimulation section is provided with an identification structure, and the identification structures are used for identifying the orientation of the stimulation sheets; and the guide wire penetrates from the tail part of the stimulation section and is electrically connected with the stimulation sheet. When the direction identification electrode is used, an image formed by developing the identification structure is less interfered, so that the direction of the wire main body can be accurately judged, the implantation angle of the wire main body can be accurately identified, the orientation of the stimulation sheet can be accurately identified, directional electrical stimulation is realized, and the application range of the direction identification electrode is widened. The treatment effect is effectively improved; and the occurrence rate of adverse reactions caused by stimulation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a direction marking electrode and a stimulation system. Background Art

[0002] Deep brain stimulation (DBS) therapy involves implanting electrodes in specific neural nuclei in the brain. High-frequency electrical stimulation can inhibit neurons with abnormal electrical activity, thereby playing a therapeutic role. This therapy can treat Parkinson's disease, essential tremor, epilepsy and other limb and mental diseases.

[0003] In the related art, the electrode wire adopts a layout of multiple sheet-shaped contacts arranged in a ring, which has the advantage of controllable stimulation direction, so that the output capacity can be concentrated near the treatment target under the same charge density, which can effectively improve the treatment effect and reduce the incidence of adverse reactions caused by stimulation. Therefore, the direction of the electrode wire in the patient's brain is extremely important.

[0004] Currently, in order to determine the direction of the electrode wire, a direction identification structure is set on the electrode wire, and the identification structure is detected by development means to determine the direction of the electrode wire. However, a guide wire is passed through the electrode wire, and the guide wire overlaps with the identification structure and interferes with the image formed during development, resulting in poor accuracy in determining the direction of the electrode, which causes the treatment effect to deteriorate when the electrode wire is used in the treatment plan, and is also prone to cause adverse reactions during stimulation. Summary of the invention

[0005] The purpose of the present invention is to provide a direction marking electrode and a stimulation system, which solves the problem in the prior art that the direction detection of the electrode wire is easily disturbed, resulting in poor direction judgment accuracy, causing the treatment effect of the electrode wire to be poor and easily causing adverse reactions during stimulation.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a direction marking electrode, comprising:

[0008] A stimulation segment, the stimulation segment comprising a wire body and at least one group of stimulation structures, the stimulation structure being arranged on the wire body and between the head and the tail of the stimulation segment, the stimulation structure comprising a plurality of stimulation pieces that are spaced and annularly insulated from each other, the head of the stimulation segment being provided with an identification structure, the identification structure being used to identify the orientation of the stimulation piece;

[0009] A guide wire is inserted from the tail of the stimulation segment and electrically connected to the stimulation sheet.

[0010] Optionally, the identification structure includes:

[0011] The identification part is arranged at the head of the stimulation section, and the identification part has an identification hole, which is a triangular hole extending along the circumference of the identification part.

[0012] Optionally, the identification portion includes an identification sheet, the identification sheet is snapped onto the outer surface of the stimulation segment, and the identification hole is opened on the identification sheet.

[0013] Optionally, the head of the wire body has a mounting groove for accommodating the identification piece.

[0014] Optionally, the identification portion further includes:

[0015] A clamping ring is arranged on the identification sheet and sleeved with the wire body.

[0016] Optionally, the wire body has a positioning block, the clamping ring has a positioning notch for accommodating the positioning block, and a side wall of the positioning block abuts against a side wall of the positioning notch.

[0017] Optionally, the wire body has a clamping platform, and the top wall of the clamping platform has a limiting plane, and the limiting plane can abut against the bottom wall of the clamping ring and the bottom wall of the identification sheet.

[0018] Optionally, the identification portion further includes:

[0019] The identification cap is arranged on the identification sheet and plugged into the head of the stimulation section. The identification cap has a glue injection hole extending therethrough.

[0020] Optionally, a plurality of mounting holes of different shapes are provided at intervals along the circumference of the stimulation segment on the outer side wall of the head of the stimulation segment, and the identification structure is used as an identification piece filled in each of the mounting holes, and the identification piece fills the mounting holes.

[0021] Optionally, the plurality of mounting holes are distributed in an axially staggered manner along the stimulation segment.

[0022] In a second aspect, the present invention also provides a stimulation system, comprising:

[0023] Stimulator;

[0024] The direction marking electrode as described in any one of the first aspects has one end for implantation in the brain and the other end electrically connected to the stimulator.

[0025] Optionally, the stimulation system further comprises: an extension wire, through which the stimulator is electrically connected to the direction marking electrode.

[0026] Beneficial effects of the present invention:

[0027] On the first aspect, by setting an identification structure at the head of the stimulation segment, and the guide wire is inserted from the tail of the stimulation segment and electrically connected to the stimulation piece, it is ensured that the guide wire does not overlap with the identification structure, so that the image of the guide wire in the radiographic image will not overlap with the image of the identification structure, which is conducive to the identification structure being developed in the radiographic image to present a clear image. The angle of the guide body can be judged according to the shape of the image, and the direction of the stimulation piece of the stimulation structure can also be judged. When the angle of the wire body is adjusted, the image presented by the identification structure will also change synchronously to ensure that the stimulation piece of the wire body can accurately face the specified direction. When the direction identification electrode is used, the image formed by the identification structure development is less disturbed, which is conducive to accurately judging the direction of the wire body, so as to accurately adjust the implantation angle of the wire body, ensure that the stimulation piece can face the specified direction, effectively improve the treatment effect and reduce the incidence of adverse reactions caused by stimulation.

[0028] Secondly, when the stimulation system is in use, the direction identification electrode can accurately judge its angle through the identification structure, thereby determining the orientation of the contact piece of the stimulation structure, so that the stimulation system can concentrate its output capacity near the treatment target, thereby improving the treatment effect while reducing the incidence of adverse reactions caused by stimulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the structure of the direction marking electrode in the first embodiment of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the identification sheet and the clamping ring of the direction identification electrode in the first embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the orientation of each stimulation piece and the image presented by the corresponding identification structure during the rotation of the direction identification electrode from 0° to 330° in the first embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the structure of the direction marking electrode in the second embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the direction marking electrode in the third embodiment of the present invention.

[0034] Figure 6 Schematic diagram of the structure of the direction marking electrode in the fourth embodiment of the present invention

[0035] Figure 7 It is a structural schematic diagram when the stimulation ring and the stimulation sheet of the direction marking electrode in the fifth embodiment of the present invention are used as contacts at the same time.

[0036] In the figure:

[0037] 10. Guide wire;

[0038] 1. Wire body; 11. Positioning block; 12. Clamping platform; 121. Limiting plane; 13. Mounting hole; 14. Mounting slot;

[0039] 2. Stimulation piece; 21. First stimulation piece; 22. Second stimulation piece; 23. Third stimulation piece;

[0040] 3. Identification structure; 31. Identification part; 311. Identification sheet; 3111. Clamp; 3112. Positioning notch; 312. Identification cap; 313. Filling hole; 32. Identification hole; 33. Identification piece;

[0041] 4. Stimulation ring. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] The embodiment of the invention discloses a direction marking electrode and a stimulator.

[0047] Reference Figure 1 and Figure 2 The direction identification electrode includes a stimulation segment and a guide wire 10. The stimulation segment includes a wire body 1 and at least one group of stimulation structures. The stimulation structure is arranged on the wire body 1 and is located between the head and the tail of the stimulation segment. The stimulation structure includes a plurality of stimulation pieces 2 that are spaced and annularly insulated from each other. The head of the stimulation segment is provided with an identification structure 3, and the identification structure 3 is used to identify the direction of the stimulation piece 2 through a radiographic image; the guide wire 10 is inserted from the tail of the stimulation segment and is electrically connected to the stimulation piece 2.

[0048] Specifically, one end of the direction marking electrode has a stimulation segment, which is used to be implanted in the user's head, and the other end of the direction marking electrode has a connection segment, which can be electrically connected to an extension wire or a stimulator. The stimulation structure of the stimulation segment is formed by multiple stimulation pieces 2 insulated and spaced rings. The number of stimulation pieces 2 included in a group of stimulation structures can be designed according to the actual application scenario, and the present invention does not limit this. In this embodiment, 4 groups of stimulation structures are arranged at intervals, and each group of stimulation structures includes three stimulation pieces 2 to form a wire body 1 with 12 contacts.

[0049] An identification structure 3 is provided at the head of the stimulation segment. The identification structure 3 can be sleeved on the stimulation segment, or can be clipped or inserted into the outer wall of the head of the stimulation segment, or can be embedded in the outer wall of the head of the stimulation segment. The identification structure 3 can be developed into a certain shape in the radiological image to identify the orientation of the stimulation piece 2. The shape can be a triangle, but is not limited to a triangle. When the stimulation segment is at different angles when the wire body 1 is implanted, the identification structure 3 can be developed in the radiological image to present different images.

[0050] By setting the identification structure 3 at the head of the stimulation segment, and the guide wire 10 is inserted from the tail of the stimulation segment and electrically connected to the stimulation piece 2, it is ensured that the guide wire 10 does not overlap with the identification structure 3, so that the image of the guide wire 10 in the radiological image will not overlap with the image of the identification structure 3, which is conducive to the identification structure 3 being developed and presenting a clear image in the radiological image. The angle of the guide body can be judged according to the shape of the image, and the direction of the stimulation piece 2 of the stimulation structure can also be judged. When the angle of the wire body 1 is adjusted, the image presented by the identification structure 3 will also change synchronously to ensure that the stimulation piece 2 of the wire body 1 can accurately face the specified direction. When the direction identification electrode is used, the image formed by the identification structure 3 development is less disturbed, which is conducive to accurately judging the direction of the wire body 1, so as to accurately adjust the implantation angle of the wire body 1, ensure that the stimulation piece 2 can face the specified direction, effectively improve the treatment effect and reduce the incidence of adverse reactions caused by stimulation.

[0051] Optionally, the identification structure 3 includes an identification portion 31. The identification portion 31 is disposed at the head of the stimulation segment, and the identification portion 31 has an identification hole 32, which is a triangular hole extending along the circumference of the identification portion 31.

[0052] Specifically, the identification part 31 is fixedly connected to the head of the stimulation segment, and the fixed connection between the two can be achieved by means of clamping, bonding, etc., and a slot or other structure can also be provided on the outer side wall of the head of the stimulation segment to form abutment and positioning with the identification part 31. The identification hole 32 is provided through the side wall of the identification part 31, and the identification hole 32 is a triangular hole, such as an isosceles triangle or an equilateral triangle, and the identification hole 32 extends along the circumference of the identification part 31. The image of the identification part 31 in the radiological image is black, while the identification hole 32 is white. When the stimulation segment rotates, the shape and size of the identification hole 32 and the identification part 31 will change.

[0053] The following further describes in detail the differences in images presented by the identification hole 32 at different development angles in combination with the three stimulation pieces 2 being arranged in an insulating ring to form a stimulation structure.

[0054] Reference Figure 3 , the three stimulation pieces 2 are the first stimulation piece 21, the second stimulation piece 22 and the third stimulation piece 23. The initial position is when the first stimulation piece 21 faces the treatment target. At this time, the angle of the wire body 1 is set to 0°, and the image presented by the identification hole 32 is a triangle with the tip facing right. Next, the wire body 1 is rotated continuously at intervals of 30°, and the angles of the stimulation segment and the stimulation structure are rotated from 0° to 330°, so that the first stimulation piece 21, the second stimulation piece 22 and the third stimulation piece 23 face the treatment target in turn. The development image formed by the identification hole 32 is hereinafter referred to as the hole image, and the development image formed by the identification portion 31 is hereinafter referred to as the base image. The changes in the development image are as follows:

[0055] At 30°, the hole image is a triangle, the size of the triangle becomes smaller (compared to 0°), and in the base image, the base of the triangle is closer to the right;

[0056] At 60°, the hole image is a trapezoid, and because the marking portion 31 is opened from the front to the back, a leftward pointed notch appears on the right side of the bottom image;

[0057] At 90°, the hole image is a sharp notch pointing to the left, and the size of the sharp notch becomes larger (compared to 60°), and the trapezoidal image disappears.

[0058] At 120°, the hole image is a triangle with its tip pointing to the left. The triangle is small in size, and an obvious gap will be formed on the right wall of the base image.

[0059] At 150°, the hole image is a triangle with its tip pointing to the left, the size of the triangle becomes larger, and in the base image, the base of the triangle is to the right;

[0060] At 180°, the hole image is a triangle with its tip pointing to the left, and the size of the triangle reaches its maximum (between 120° and 210°);

[0061] At 210°, the hole image is a triangle with its tip pointing to the left, the size of the triangle is reduced, and in the base image, the base of the triangle is to the left (compared to 150°);

[0062] At 240°, the hole image is trapezoidal, and a sharp notch pointing rightward is formed on the left side of the base image;

[0063] At 270°, the hole image is a sharp notch with the tip pointing to the right;

[0064] At 300°, the hole image is a triangle with the tip pointing to the right, and there will be an obvious gap on the left side of the base image;

[0065] At 330°, the hole image is a triangle with its tip pointing to the right, and the size of the triangle increases (compared to 300°). In the base image, the base of the triangle is on the left.

[0066] Optionally, the identification portion 31 includes an identification sheet 311 , the identification sheet 311 is snap-fitted to the outer surface of the stimulation segment, and the identification hole 32 is opened in the identification sheet 311 .

[0067] Specifically, the identification portion 31 is in the form of a sheet and an arc, so as to be combined with the outer wall of the head of the stimulation segment, and an adhesive layer can be filled between the identification sheet 311 and the stimulation segment to fix the identification sheet 311 to the head of the stimulation segment. A through hole is formed through the side of the identification sheet 311 as the identification hole 32, and the size of the specific identification sheet 311 can be designed according to the size that the identification hole 32 needs to reach, and the present invention does not limit this.

[0068] Reference Figure 2 Optionally, the identification portion 31 further includes a snap ring 3111. The snap ring 3111 is disposed on the identification sheet 311 and is sleeved with the wire body 1. The wire body 1 has a positioning block 11, and the snap ring 3111 has a positioning notch 3112 for accommodating the positioning block 11, and the side wall of the positioning block 11 abuts against the side wall of the positioning notch 3112. The wire body 1 is clamped on the platform 12, and the top wall of the clamping platform 12 has a limiting plane 121, and the limiting plane 121 can abut against the bottom wall of the snap ring 3111 and the bottom wall of the identification sheet 311.

[0069] Specifically, a positioning block 11 and a clamping platform 12 are provided on the outer side wall of the stimulation section. The clamping platform 12 extends along the circumference of the stimulation section, and its top wall as a limiting plane 121 can be pressed against the bottom wall of the clamping ring 3111, so that the identification piece 311 is pressed against the limiting plane 121. The positioning block 11 extends along the axial direction of the wire body 1 and protrudes from the clamping platform 12. The clamping ring 3111 has a positioning notch 3112. When the identification piece 311 is sleeved on the stimulation section, the positioning block 11 is inserted into the positioning notch 3112, and the side wall of the positioning block 11 is abutted against the side wall of the plug-in notch. In this way, when installing the identification piece 311, it is only necessary to plug the identification piece 311 into the stimulation section, and the positioning block 11 and the clamping platform 12 of the stimulation section can be used to form a clamping positioning, so as to quickly fix the identification piece 311 on the stimulation section.

[0070] Embodiment 2

[0071] On the basis of the first embodiment, the difference between this embodiment and the first embodiment lies in the different connection structure between the identification portion 31 and the wire body 1 .

[0072] Reference Figure 4 Optionally, the identification portion 31 further includes an identification cap 312, which is disposed on the identification sheet 311 and plugged into the head of the stimulation segment. The identification cap 312 has a glue injection hole 313 extending therethrough.

[0073] Specifically, the identification cap 312 is buckled on the end face of the head end of the stimulation section, an arc-shaped identification sheet 311 extends downward from the bottom wall of the identification cap 312, a slot for inserting the identification sheet 311 is provided on the outer side of the stimulation section, and the side and bottom surfaces of the identification sheet 311 can abut against the groove side walls of the slot. A through hole is provided through the identification sheet 311 as the identification hole 32. A glue injection hole 313 is provided on the identification cap 312 to facilitate glue injection and fixing.

[0074] Embodiment 3

[0075] On the basis of the first embodiment, the difference between this embodiment and the first embodiment lies in the different structure of the identification portion 31 .

[0076] Reference Figure 5Optionally, the head of the wire body 1 has a mounting groove 14 for accommodating the identification piece 311.

[0077] Specifically, a mounting groove 14 is opened on the outer wall of the stimulation section, and the identification piece 311 is inserted into the slot. The side wall of the identification piece 311 is tightly pressed against the groove wall of the mounting groove 14, and can be bonded and fixed in the mounting groove 14 by filling glue or the like.

[0078] Embodiment 4

[0079] Based on the first embodiment, the difference between this embodiment and the first embodiment lies in that the identification structure 3 is different.

[0080] Reference Figure 6 Optionally, a plurality of mounting holes 13 of different shapes are provided at intervals on the outer side wall of the head of the stimulation segment along the circumference of the stimulation segment, and the identification structure 3 is used as an identification member 33 filled in each mounting hole 13, and the identification member 33 fills the mounting hole 13. The plurality of mounting holes 13 are staggered along the axial direction of the stimulation segment.

[0081] Specifically, by directly opening mounting holes 13 of different shapes on the stimulation segment, and then filling the identification members 33 according to the mounting holes 13, multiple mounting holes 13 can correspond to multiple stimulation pieces 2 one by one, and multiple mounting holes 13 can be arranged in a ring along the circumference of the stimulation segment, and can be staggered along the axial direction of the stimulation segment, so that the multiple identification members 33 not only have different shapes, but also have different heights relative to the stimulation segment. In this embodiment, two mounting holes 13 are provided, one of which is circular and the other is triangular, and the circular mounting hole 13 is closer to the end face of the head of the stimulation segment.

[0082] Multiple identification members 33 are installed by directly opening installation holes 13 of different shapes on the stimulation segment, and the installation holes 13 are staggered along the axial direction of the stimulation segment, so that the multiple identification members 33 not only have different shapes, but also have different heights relative to the stimulation segment. Therefore, when the wire body 1 is rotated at an angle, different images can be developed to accurately identify the orientation of the wire body 1.

[0083] Embodiment 5

[0084] Based on the first embodiment, the second embodiment, the third embodiment or the fourth embodiment, the fifth embodiment is different from the above embodiments in that the layout of the stimulation structure is different.

[0085] Reference Figure 7 Optionally, a plurality of stimulation rings 4 are arranged at intervals in the stimulation segment.

[0086] Specifically, the stimulation segment is provided with not only multiple groups of stimulation structures but also a complete stimulation ring 4. Two stimulation rings 4 can be provided at intervals, and two groups of stimulation structures are provided at intervals between the two stimulation rings 4, so that the stimulation segment of the wire body 1 has a total of 8 contacts. It should be understood that the specific number of stimulation rings 4 and stimulation structures can be designed according to the actual application scenario, and the present invention does not limit this.

[0087] The stimulation system comprises a stimulator, an extension wire and a direction marking electrode in any of the above embodiments. One end of the direction electrode is used to be implanted in the brain, and the other end is electrically connected to the stimulator or electrically connected to the stimulator through the extension wire.

[0088] When the stimulation system is in use, the direction identification electrode can accurately judge its angle through the identification structure 3, thereby determining the orientation of the contact piece of the stimulation structure, so that the stimulation system can concentrate its output capacity near the treatment target, thereby improving the treatment effect and reducing the incidence of adverse reactions caused by stimulation.

[0089] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A direction marking electrode, characterized in that: include: A stimulation segment, the stimulation segment comprising a wire body (1) and at least one group of stimulation structures, the stimulation structure being arranged on the wire body (1) and located between the head and tail of the stimulation segment, the stimulation structure comprising a plurality of stimulation pieces (2) arranged in an annular manner and insulated from each other, the head of the stimulation segment being provided with an identification structure (3), the identification structure (3) being used to identify the orientation of the stimulation piece (2); A guide wire (10) is inserted from the tail of the stimulation section and is electrically connected to the stimulation piece (2).

2. The direction marking electrode according to claim 1, characterized in that: The identification structure (3) comprises: The marking portion (31) is arranged at the head of the stimulation section, and the marking portion (31) has a marking hole (32), and the marking hole (32) is a triangular hole extending along the circumference of the marking portion (31).

3. The direction marking electrode according to claim 2, characterized in that: The identification portion (31) comprises an identification sheet (311), the identification sheet (311) is snap-connected to the outer surface of the stimulation section, and the identification hole (32) is provided in the identification sheet (311).

4. The direction marking electrode according to claim 3, characterized in that: The head of the wire body (1) has a mounting groove (14) for accommodating the identification sheet (311).

5. The direction marking electrode according to claim 3, characterized in that: The identification portion (31) further includes: A clamping ring (3111) is arranged on the identification sheet (311) and is sleeved with the wire body (1).

6. The direction marking electrode according to claim 5, characterized in that: The wire body (1) has a positioning block (11), the clamping ring (3111) has a positioning notch (3112) for accommodating the positioning block (11), and the side wall of the positioning block (11) abuts against the side wall of the positioning notch (3112).

7. The direction marking electrode according to claim 6, characterized in that: The wire body (1) has a clamping platform (12), the top wall of the clamping platform (12) has a limiting plane (121), and the limiting plane (121) can abut against the bottom wall of the clamping ring (3111) and the bottom wall of the identification sheet (311).

8. The direction marking electrode according to claim 3, characterized in that: The identification portion (31) further includes: The identification cap (312) is arranged on the identification sheet (311) and plugged into the head of the stimulation section. The identification cap (312) has a glue injection hole (313) extending therethrough.

9. The direction marking electrode according to claim 1, characterized in that: The outer side wall of the head of the stimulation section is provided with a plurality of mounting holes (13) of different shapes at intervals along the circumference of the stimulation section, and the identification structure (3) is an identification piece (33) filled in each of the mounting holes (13), and the identification piece (33) fills the mounting hole (13).

10. The direction marking electrode according to claim 9, characterized in that: The plurality of mounting holes (13) are distributed in an offset manner along the axial direction of the stimulation section.

11. A stimulation system, characterized in that include: Stimulator; The direction marking electrode according to any one of claims 1 to 10, one end of which is used for implantation in the brain, and the other end of which is electrically connected to the stimulator.

12. The stimulation system according to claim 11, characterized in that The stimulation system further comprises: An extension wire, through which the stimulator is electrically connected to the direction marking electrode.

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