Puncture assembly and electrode placement device

Abstract

This utility model discloses a puncture assembly and an electrode placement device. The puncture assembly includes an outer cylinder and an inner core. The outer cylinder includes a body and a positioning part, with a first channel inside the body. The positioning part has at least one positioning groove. The inner core includes a core body and at least one positioning handle. When the inner core is placed in the first channel, the positioning handle engages with the corresponding positioning groove. Utilizing the cooperation between the positioning handle and the positioning groove, the inner core and outer cylinder of the puncture assembly can be positioned, facilitating adjustment of the movement angle during puncture, reducing puncture difficulty, and minimizing patient discomfort.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a puncture assembly and an electrode placement device. Background Technology

[0002] During spinal cord nerve stimulation implantation, the implantable spinal cord nerve stimulation electrode needs to be placed at the target location within the patient's body. Clinically commonly used surgical sheet electrodes are double-row and triple-row surgical sheet electrodes, which are relatively wide, making placement more difficult. Furthermore, due to their sheet-like structure, the angle of movement must be controlled during placement to ensure the sheet electrode reaches the target position at a predetermined angle. In electrode placement devices, a puncture assembly is used to widen the tissue and serve as a channel for the sheet electrode's movement. However, existing electrode placement devices and puncture assemblies have limited capacity to accommodate sheet electrodes of a certain width, and the relative position of the outer cylinder and inner core is not fixed, making angle adjustment during puncture difficult and increasing patient discomfort. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a puncture component and an electrode placement device, which positions the relative position of the inner core and outer cylinder of the puncture component, making it easier to adjust the movement angle during the puncture process, so as to make the subsequent placement of the sheet electrode smoother and reduce patient pain.

[0004] In a first aspect, embodiments of the present invention provide a puncture assembly, comprising:

[0005] The outer cylinder includes a cylinder body and a positioning part. The positioning part is located at the tail end of the cylinder body. A first channel is provided inside the cylinder body. The first channel passes through the cylinder body and the positioning part and forms a top opening and a tail opening. At least one positioning groove is provided on the positioning part.

[0006] The inner core includes a core body and at least one positioning handle. A second channel is formed through the interior of the core body. The positioning handle is connected to the outer side of the tail end of the core body. The number of positioning handles is the same as the number of positioning slots.

[0007] When the inner core is placed in the first channel, the positioning handle is engaged in the corresponding positioning groove.

[0008] Optionally, the diameter of the front end of the core is reduced to form a variable diameter section, the top opening of the cylinder faces to one side, the top of the cylinder has an arc on the side away from the top opening, the variable diameter section has an arc on one side, and when the core is disposed in the cylinder, the arc-shaped part of the top of the cylinder and the arc-shaped part of the variable diameter section are located on the same side.

[0009] Optionally, when the core is disposed inside the cylinder, the variable diameter portion extends out of the front end of the cylinder from the top opening.

[0010] Optionally, the positioning part has a central groove at the center of the surface on the side where the positioning groove is provided, and the central groove is connected to the first channel and is connected to at least one of the positioning grooves in the circumferential direction.

[0011] Optionally, the tail end of the core extends outward to form a contact plate, and at least one of the positioning handles is connected to the contact plate. When the core is placed in the first channel, the contact plate is engaged in the central groove.

[0012] Optionally, the number of positioning grooves and positioning handles is three. The three positioning grooves are arranged along the circumferential direction of the central groove. The three positioning grooves include one first positioning groove and two second positioning grooves. The first positioning groove and the second positioning grooves have different shapes. The three positioning handles are arranged along the circumferential direction of the contact plate. The three positioning handles include one first positioning handle and two second positioning handles. The first positioning handle and the second positioning handles have different shapes.

[0013] The first positioning groove is configured to conform to the shape of the first positioning handle, and the second positioning groove is configured to conform to the shape of the second positioning handle.

[0014] Optionally, the variable diameter section is a triangular pyramid-shaped part.

[0015] Secondly, embodiments of the present invention provide an electrode placement device, comprising:

[0016] Puncture components;

[0017] A push rod includes a rod body and a handle. An electrode groove is provided at the front end of the rod body, and guide wire grooves are provided on both sides of the rod body. The electrode groove is connected to the guide wire groove. The handle is connected to the tail end of the rod body. The rod body can be inserted into the cylinder.

[0018] A hand drill includes a drill body and at least one drill shank. The top of the drill body is threaded on the side facing the top opening. A third channel is formed through the inside of the drill body. The drill shank is connected to the outside of the tail end of the drill body. The number of drill shanks is the same as the number of positioning slots. The drill body can be inserted into the cylinder.

[0019] Optionally, the tail end of the drill body extends outward to form a hand drill tail plate, at least one of the drill shanks is connected to the hand drill tail plate, and when the drill body is set in the first channel, the hand drill tail plate is inserted into the central groove, and each drill shank is configured to conform to the corresponding positioning groove.

[0020] Optionally, the electrode groove is configured to conform to the shape of the electrode tail end, and a marking line is provided at the end of the rod body near the handle.

[0021] This utility model provides a puncture assembly and an electrode placement device. The puncture assembly includes an outer cylinder and an inner core. The outer cylinder includes a body and a positioning part, with a first channel inside the body. The positioning part has at least one positioning groove. The inner core includes a core body and at least one positioning handle. When the inner core is placed in the first channel, the positioning handle engages with the corresponding positioning groove. By utilizing the cooperation between the positioning handle and the positioning groove, the inner core and outer cylinder of the puncture assembly can be positioned, facilitating adjustment of the movement angle during puncture, reducing puncture difficulty, and minimizing patient discomfort. Attached Figure Description

[0022] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the puncture component structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the outer cylinder structure of one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the inner core structure of one embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the tail structure of the puncture component according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the inner core tail structure of one embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the outer cylinder tail structure of one embodiment of the present invention;

[0029] Figure 7 This is a side view of the outer cylinder tail structure according to an embodiment of the present invention;

[0030] Figure 8 This is a cross-sectional view of the outer cylinder tail structure according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the tail structure of a puncture assembly with different shapes for the first and second positioning handles according to an embodiment of the present invention.

[0032] Figure 10 This is a schematic diagram of the inner core tail structure of an embodiment of the present invention, showing that the first positioning handle and the second positioning handle have different shapes.

[0033] Figure 11This is a schematic diagram of the inner core tail structure with different shapes for the first positioning groove and the second positioning groove in one embodiment of this utility model;

[0034] Figure 12 This is a three-dimensional schematic diagram of a push rod according to an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of the front side of the push rod according to an embodiment of the present invention;

[0036] Figure 14 This is a cross-sectional view of the push rod according to an embodiment of the present invention;

[0037] Figure 15 This is a schematic diagram of a hand drill structure according to an embodiment of the present invention;

[0038] Figure 16 This is a schematic diagram of a hand drill installed inside the outer cylinder according to an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1-Outer cylinder; 11-Cylinder body; 12-Positioning part; 13-Central groove; 14-Positioning groove; 141-First positioning groove; 142-Second positioning groove; 15-Top opening; 16-First channel; 2-Inner core; 21-Core body; 22-Second channel; 23-Positioning handle; 231-First positioning handle; 232-Second positioning handle; 24-Variable diameter part; 25-Contact plate; 3-Push rod; 31-Rod body; 32-Rod handle; 33-Electrode groove; 34-Guide wire groove; 35-Marking line; 4-Hand drill; 41-Thread; 42-Drill body; 43-Drill handle. Detailed Implementation

[0041] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0042] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0043] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0045] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0046] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0047] Reference Figures 1-3 The puncture assembly of this utility model embodiment includes an outer cylinder 1 and an inner core 2. The outer cylinder 1 is used to widen the channel for placing the sheet electrode, and the inner core 2 is used to fill the internal space of the outer cylinder 1 during puncture movement and guide the puncture direction. The outer cylinder 1 includes a cylinder body 11 and a positioning part 12, such as... Figure 2As shown, the positioning part 12 is located at the tail of the cylindrical body 11, and is connected in a ring shape to the outer side of the tail of the cylindrical body 11. The positioning part 12 is used to cooperate with the inner core 2 and position the inner core 2. A first channel 16 is opened inside the cylindrical body 11. The first channel 16 passes through the cylindrical body 11 and the positioning part 12 and forms a top opening 15 and a tail opening for accommodating the inner core 2 and the sheet electrode. The first channel 16 has sufficient space to accommodate double-row and triple-row surgical sheet electrodes, allowing them to move along the first channel 16 and be pushed to the target position through the top opening 15, avoiding difficulties in placing the sheet electrodes due to insufficient internal space. The top opening 15 also allows double-row and triple-row surgical sheet electrodes to pass through, avoiding obstruction of electrode placement. When it is necessary to move the puncture device to the predetermined position, the inner core 2 is inserted into the first channel 16 to fill the internal space of the cylindrical body 11, and the puncture assembly is punctured through the diameter-changing part 24 of the inner core 2. When it is necessary to place the sheet electrode, the inner core 2 is pulled out, the sheet electrode is placed in the first channel 16, and the sheet electrode is pushed to move it to the top opening 15 and further positioned to the target position, thus realizing the placement of the sheet electrode. The positioning part 12 is provided with at least one positioning groove 14. Depending on the actual situation, the number of positioning grooves 14 can also be two or three, etc., for cooperating with the positioning handle 23 of the inner core 2 to achieve positioning, so that when adjusting the moving angle of the puncture assembly, there will be no slippage between the outer cylinder 1 and the inner core 2, reducing the difficulty of puncture.

[0048] Reference Figures 3-5The inner core 2 includes a core body 21 and at least one positioning handle 23. The positioning handle 23 is connected to the outer side of the tail end of the core body 21. When the inner core 2 is placed in the first channel 16, the positioning handle 23 engages with the corresponding positioning groove 14. The number of positioning handles 23 is the same as the number of positioning grooves 14. Depending on the actual situation, the number of positioning handles 23 can also be two or three, the same as the number of positioning grooves 14. A second channel 22 is formed through the core body 21 to accommodate the guide wire that guides the movement of the puncture assembly. The diameter of the front end of the core body 21 is reduced to form a variable diameter section 24. Due to the opening formed by the second channel 22, the tip of the variable diameter section 24 forms an opening perpendicular to the axial direction, and its diameter is approximately the same as the diameter of the guide wire. This allows the variable diameter section 24 to move along the guide wire and expand the surrounding tissue when the puncture assembly is moved. The top opening 15 of the cylindrical body 11 faces one side, and its width allows for the passage of double-row and triple-row surgical electrode pads. During electrode placement, the electrode pads can be positioned at a certain angle on the side facing the top opening 15 and located at the target position. The side of the top of the cylindrical body 11 away from the top opening 15 is curved, making electrode placement more directional and facilitating adjustment. Simultaneously, the curved side is more gentle on the patient's internal tissues, reducing patient discomfort during puncture. The diameter-changing section 24 is also curved on one side. When the inner core 2 is placed inside the cylindrical body 11, the curved portion at the top of the cylindrical body 11 and the curved portion of the diameter-changing section 24 are on the same side, avoiding a sharp angle between the diameter-changing section 24 and the top opening 15, which could cause unnecessary damage to the patient during puncture. Depending on the actual situation, the variable diameter section 24 can be a triangular pyramid shape, and the length of the core 21 is slightly larger than the length of the cylinder 11. When the inner core 2 is placed inside the cylinder 11, the variable diameter section 24 extends from the top opening 15 to the front end of the cylinder 11 to expand the surrounding tissue, reduce puncture difficulty, and reduce patient pain. At the same time, the triangular pyramid shape makes it easy for the operator to adjust the angle when moving the puncture assembly, so that the sheet electrode can be placed at the target position at a predetermined angle.

[0049] In some embodiments, refer to Figures 4-6 The positioning part 12 has a central groove 13 at the center of the surface on the side where the positioning groove 14 is provided. The central groove 13 communicates with the first channel 16 and is also connected to at least one positioning groove 14 in the circumferential direction. The inner core 2 extends outward from its tail end to form a contact plate 25, and at least one positioning handle 23 is connected to the contact plate 25. Figures 7-8 As shown, when the inner core 2 is placed inside the outer cylinder 1, the contact plate 25 engages with the central groove 13. The contact between the contact plate 25 and the central groove 13 further limits the position of the inner core 2 in the axial direction. At the same time, connecting the positioning handle 23 to the contact plate 25 reduces the force on the positioning handle 23 in the axial direction, avoiding problems such as bending and breaking of the positioning handle 23 when pushing the puncture assembly, thus reducing puncture difficulties.

[0050] In some embodiments, refer to Figure 9 , Figure 10 , Figure 11 There are three positioning grooves 14 and three positioning handles 23. The positions of the three positioning handles 23 correspond to the positions of the three edges of the triangular pyramid-shaped variable diameter section 24, and are used to cooperate with the three positioning grooves 14 to limit the angle of the core 21 inside the cylinder 11. The three positioning grooves 14 are arranged along the circumferential direction of the central groove 13, and the three positioning handles 23 are arranged along the circumferential direction of the contact plate 25. Depending on the actual situation, one of the three positioning grooves 14 needs to be distinguished from the other two to achieve positioning of the core 21 at a certain angle, such as different shapes, different spacing, etc. For example, such as... Figures 10-11 As shown, the three positioning grooves 14 include one first positioning groove 141 and two second positioning grooves 142, which have different shapes. Similarly, the three positioning handles 23 include one first positioning handle 231 and two second positioning handles 232, which have different shapes. The first positioning groove 141 is shaped to the first positioning handle 231, and the second positioning groove 142 is shaped to the second positioning handle 232. By differentiating the shapes of the first positioning handle 231 and the second positioning handle 232, and the first positioning groove 141 and the second positioning groove 142, the outer cylinder 1 and the inner core 2 of the piercing assembly can only be installed at one angle, thus fixing the installation angle. Depending on the actual situation, different intervals can also be designed to distinguish the first positioning handle 231 and the second positioning handle 232, or the structure of the central groove 13 and the contact part can be designed to have a non-centrally symmetrical shape, thereby achieving the positioning of the installation angle and reducing the difficulty of piercing.

[0051] Reference Figure 1 , Figures 12-16 The electrode placement device of this utility model embodiment includes a puncture assembly, a push rod 3, and a hand drill 4. The push rod 3 is used to push the sheet electrode forward when it is difficult to move. The hand drill 4 is used to cooperate with the outer cylinder 1. When the pushing resistance is too high and the puncture assembly is difficult to advance, the hand drill 4 can be used to widen the obstructing tissue. (Refer to...) Figure 12 , Figure 13 and Figure 14The push rod 3 includes a rod body 31 and a handle 32. The handle 32 is connected to the tail end of the rod body 31. The rod body 31 can be inserted into the cylinder 11. An electrode groove 33 is opened at the front end of the rod body 31, and guide wire grooves 34 are opened on both sides of the rod body 31. The electrode groove 33 communicates with the guide wire grooves 34 and is shaped to match the tail end of the electrode. Since double-row and triple-row surgical sheet electrodes are used clinically, the electrode groove 33 is a linear groove extending to both sides to cooperate with the tail end of the sheet electrode, which has a relatively wide width. When the sheet electrode needs to be pushed, the push rod 3 is inserted and the tail end of the electrode is inserted into the electrode groove 33. The guide wire groove 34 avoids the electrode guide wire, and the operator applies force to push the sheet electrode. The handle 32 facilitates the operator's pushing action and facilitates the placement of the sheet electrode.

[0052] In some embodiments, refer to Figure 12 A marking line 35 is provided at one end of the rod body 31 near the handle 32. The marking line 35 is used to indicate the position of the push rod 3 entering the cylinder 11. When the push rod 3 moves to the point where the marking line 35 is aligned with the plane of the positioning part 12, it indicates that the sheet electrode has been pushed to the target position.

[0053] The movement of the puncture assembly within the body is guided by a guidewire. Since the electrodes used clinically are double-row and triple-row surgical sheet electrodes, which are difficult to insert using conventional puncture needles, when sheet electrode implantation is required, a guidewire is first inserted through a puncture needle. The guidewire then guides the puncture assembly to the predetermined position, and the sheet electrode is delivered to the target location through the first channel 16 inside the puncture assembly. The puncture needle has a liner. During puncture, the puncture needle and liner are inserted together and penetrate the ligamentum flavum, ensuring its tip accurately reaches the predetermined position of the dorsal column of the spinal cord. After reaching the predetermined position, the liner is withdrawn, creating a channel within the puncture needle through which the guidewire can pass. The guidewire is smoothly advanced into the patient's body through this channel, reaching the predetermined position to guide the movement of the puncture assembly. After the guidewire is inserted, the puncture needle is withdrawn.

[0054] To deliver the sheet electrode to the target location, the outer cylinder 1 needs to be inserted and its entry angle adjusted so that the sheet electrode can enter the target location at a predetermined angle. The inner core 2 of the puncture assembly is inserted into the first channel 16 of the outer cylinder 1, and the contact portion is engaged with the central groove 13. The positioning handle 23 is engaged with the positioning groove 14. Since the length of the core 21 is slightly greater than the length of the cylinder 11, the variable diameter portion 24 will extend from the top opening 15. Simultaneously, through the cooperation between the first positioning groove 141 and the first positioning handle 231, and the second positioning groove 142 and the second positioning handle 232, the curved portion at the front end of the cylinder 11 corresponds to the curved portion of the variable diameter portion 24. The puncture assembly is then placed over the guide wire, which enters the second channel 22. The puncture assembly enters the patient's body along the guide wire, with its top opening 15 close to the predetermined position to avoid damage to tissues or nerves outside the target location. The triangular pyramidal structure of the variable diameter portion 24 can expand the surrounding tissue during the puncture process. When the operator adjusts the angle of the puncture assembly, because the first positioning handle 231 and the second positioning handle 232 are different, and they correspond to the three edges of the triangular pyramid shape of the diameter-changing part 24, the operator can determine the shape of the triangular pyramid shape of the diameter-changing part 24 by observing the position of the first positioning handle 231, and determine the angle and position of the puncture assembly in the patient's body using auxiliary methods such as X-rays. The operator adjusts the position and angle of the puncture assembly so that the sheet electrode can be placed in the target position and ensure optimal shape.

[0055] When the pushing resistance is too great and the puncture component is difficult to advance, a hand drill (4) can be used to help widen the obstructing tissue. (Refer to...) Figures 15-16The hand drill 4 includes a drill body 42 and at least one drill shank 43, the number of which is the same as the number of positioning slots 14. The length of the hand drill 4 is the same as the length of the cylinder 11. The drill body 42 can be inserted into the cylinder 11. The top of the drill body 42 is provided with a thread 41 on the side facing the top opening 15 of the outer cylinder 1. The side of the top of the drill body 42 away from the top opening 15 has a smooth structure that matches the shape of the inner wall of the first channel 16 to protect the tissues and nerves in the patient's body and avoid damage when expanding the tissue. Depending on the actual situation, the thread spacing of the thread 41 is small, and the thread 41 is only provided on the top part of the drill body 42 to further reduce damage to tissues and nerves in non-target locations and reduce patient pain. A third channel 44 is formed through the inside of the drill body 42. The third channel 44 is used to pass through the guide wire to guide the forward direction of the hand drill 4. When using the hand drill 4, the inner core 2 is first removed, and then the guide wire is passed through the channel of the third channel 44, so that the thread 41 moves to the obstructed position, and the thread 41 is used to expand the obstructing tissue. A drill shank 43 is connected to the outer side of the tail end of the drill body 42. The tail end of the drill body 42 extends outward to form a hand drill tailplate 45. At least one drill shank 43 is connected to the hand drill tailplate 45, forming a structure similar to the positioning shank 23 and the contact plate 25. When the drill body 42 is placed in the first channel 16, the hand drill tailplate 45 is engaged in the central groove 13, and each drill shank 43 is shaped to correspond to the positioning groove 14. The cooperation between the hand drill tailplate 45 and the drill shank 43 enables the positioning of the hand drill 4, especially its thread 41, ensuring that when the tip of the hand drill 4 protrudes from the tip opening 15, the thread 41 is located on the side facing the tip opening 15, i.e., the side away from non-target tissues and nerves. Depending on the actual situation, when at least one positioning groove 14 is formed with different shapes or arrangements for differentiation, the drill shank 43 corresponding to each positioning groove 14 is also designed to be shaped to match or arranged in the same way to achieve differentiation, thereby positioning the hand drill 4 at a certain angle and avoiding damage to non-target locations by the thread 41.

[0056] After moving the puncture assembly to the predetermined position, the inner core 2 and guide wire are withdrawn, allowing the first channel 16 to accommodate the sheet electrode and its guide wire. The first channel 16 can accommodate double-row and triple-row surgical sheet electrodes. The operator delivers the sheet electrode to the target position through the first channel 16. To achieve more precise positioning and ensure the sheet electrode is successfully placed in the designated position, the final placement position of the sheet electrode is first confirmed using a blank electrode and its guide wire. When movement encounters resistance and is difficult to continue, a push rod 3 is used for assistance. The push rod 3 is inserted into the first channel 16 to assist movement. At this time, the tail end of the blank electrode is engaged in the electrode groove 33, and the guide wire groove 34 avoids the guide wire of the blank electrode. The operator pushes the push rod 3 to align its marking line 35 with the plane of the positioning part 12, completing the placement of the blank electrode. When the pushing resistance is too great and the puncture assembly is difficult to advance, the operator can also use a hand drill 4 to widen the obstructing tissue. The operator can use X-rays to determine whether the location of the blank electrode is the target location. After determining the target location, the blank electrode and its guide wire are removed, and the sheet electrode is placed.

[0057] A sheet electrode with two or three rows of electrodes and an electrode guide wire are placed in the first channel 16, with wires and other structures disposed inside the electrode guide wire. The electrode guide wire guides the movement of the sheet electrode, allowing it to move smoothly to the target position. The top opening 15 faces to one side and can accommodate the two or three rows of surgical sheet electrodes, allowing the sheet electrode to be moved out through the top opening 15 and positioned at a predetermined angle to one side of the top opening 15. When the sheet electrode encounters resistance during movement, the push rod 3 is used to resolve the issue, ultimately pushing the sheet electrode out of the top opening 15 to the target position.

[0058] This application provides a puncture assembly and an electrode placement device. The puncture assembly includes an outer cylinder and an inner core. The outer cylinder includes a body and a positioning part, with a first channel inside the body. The positioning part has at least one positioning groove. The inner core includes a core body and at least one positioning handle. When the inner core is placed in the first channel, the positioning handle engages with the corresponding positioning groove. By utilizing the cooperation between the positioning handle and the positioning groove, the inner core and outer cylinder of the puncture assembly can be positioned, facilitating adjustment of the movement angle during puncture, reducing puncture difficulty, and minimizing patient discomfort.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A puncture assembly, characterized in that, The puncture assembly includes: The outer cylinder (1) includes a cylinder body (11) and a positioning part (12). The positioning part (12) is disposed at the tail end of the cylinder body (11). A first channel (16) is provided inside the cylinder body (11). The first channel (16) passes through the cylinder body (11) and the positioning part (12) and forms a top opening (15) and a tail opening. At least one positioning groove (14) is provided on the positioning part (12). The inner core (2) includes a core body (21) and at least one positioning handle (23). The core body (21) has a second channel (22) through it. The positioning handle (23) is connected to the outer side of the tail end of the core body (21). The number of positioning handles (23) is the same as the number of positioning grooves (14). When the core (21) is placed in the first channel (16), the positioning handle (23) is engaged in the corresponding positioning groove (14).

2. The puncture assembly according to claim 1, characterized in that, The front end diameter of the core (21) is reduced to form a variable diameter section (24). The top opening (15) of the cylinder (11) faces to one side. The top end of the cylinder (11) is curved on the side away from the top opening (15). The variable diameter section (24) is curved on the side. When the core (21) is placed inside the cylinder (11), the curved part at the top end of the cylinder (11) and the curved part of the variable diameter section (24) are located on the same side.

3. The puncture assembly according to claim 2, characterized in that, When the core (21) is disposed inside the cylinder (11), the variable diameter part (24) extends out of the front end of the cylinder (11) through the top opening (15).

4. The puncture assembly according to claim 1, characterized in that, The positioning part (12) has a central groove (13) at the center of the side surface on which the positioning groove (14) is provided. The central groove (13) is connected to the first channel (16) and is connected to at least one of the positioning grooves (14) in the circumferential direction.

5. The puncture assembly according to claim 4, characterized in that, The core (21) extends outward at its tail end to form a contact plate (25), and at least one of the positioning handles (23) is connected to the contact plate (25). When the core (21) is placed in the first channel (16), the contact plate (25) is inserted into the central groove (13).

6. The puncture assembly according to claim 5, characterized in that, The number of positioning grooves (14) and positioning handles (23) is three. The three positioning grooves (14) are arranged along the circumferential direction of the central groove (13). The three positioning grooves (14) include one first positioning groove (141) and two second positioning grooves (142). The first positioning groove (141) and the second positioning grooves (142) have different shapes. The three positioning handles (23) are arranged along the circumferential direction of the contact plate (25). The three positioning handles (23) include one first positioning handle (231) and two second positioning handles (232). The first positioning handle (231) and the second positioning handles (232) have different shapes. The first positioning groove (141) is configured to conform to the shape of the first positioning handle (231), and the second positioning groove (142) is configured to conform to the shape of the second positioning handle (232).

7. The puncture assembly according to claim 2, characterized in that, The variable diameter section (24) is a triangular pyramid shape.

8. An electrode placement device, characterized in that, include: The puncture assembly as described in any one of claims 1-7; The push rod (3) includes a rod body (31) and a handle (32). The rod body (31) has an electrode groove (33) at its front end and guide wire grooves (34) on both sides. The electrode groove (33) communicates with the guide wire groove (34). The handle (32) is connected to the tail end of the rod body (31). The rod body (31) can be inserted into the cylinder (11). A hand drill (4) includes a drill body (42) and at least one drill shank (43). The top end of the drill body (42) is provided with a thread (41) facing the top opening (15). A third channel (44) is formed through the inside of the drill body (42). The drill shank (43) is connected to the outside of the tail end of the drill body (42). The number of drill shanks (43) is the same as the number of positioning slots (14). The drill body (42) can be inserted into the cylinder (11).

9. The electrode placement device according to claim 8, characterized in that, The drill body (42) extends outward at its tail end to form a hand drill tail plate (45), and at least one drill shank (43) is connected to the hand drill tail plate (45). When the drill body (42) is placed in the first channel (16), the hand drill tail plate (45) is inserted into the central groove (13). Each drill shank (43) is shaped to conform to the corresponding positioning groove (14).

10. The electrode placement device according to claim 8, characterized in that, The electrode groove (33) is designed to conform to the shape of the electrode tail end, and a marking line (35) is provided on one end of the rod body (31) near the handle (32).

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