Depth limiter

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a depth limiter. The depth limiter comprises a main body and a locking piece, the main body comprises a first abutting part and a second abutting part, and a clamping space used for containing an electrode wire is formed between the first abutting part and the second abutting part; the locking piece is connected with the main body, and the locking piece can extrude the first abutting part and / or the second abutting part, so that the first abutting part and the second abutting part tightly press the electrode wire in the clamping space. According to the utility model, the problem that the electrode lead is large in stress and easy to deform due to small stress area of the locking screw when the electrode lead is pressed down by the locking screw for locking can be solved; the problem that as the pressure of the locking screw on the electrode is gradually increased, the locking screw abuts against the surface of the electrode wire and rotates on the surface of the electrode wire to damage the surface of the electrode wire can be solved; the electrical stimulation stability between the electrode and the brain tissue is ensured, and the treatment effect is improved; and the implantation operation feeling of a patient is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a depth limiter. Background Technology

[0002] In deep brain stimulation (DBS) surgery, the depth of electrode lead implantation is a crucial factor in ensuring surgical success. To ensure accurate implantation of the electrode lead to the intended target brain region, a depth limiter is typically used during the procedure. The purpose of the depth limiter is to measure the implantation length of the electrode lead before surgery and fix it at a restricted position to prevent inaccurate implantation.

[0003] The depth limiter primarily secures the electrode wires using locking screws. However, this locking method currently presents two problems.

[0004] Firstly, when tightening the electrode leads with a locking screw, the small contact area of ​​the screw results in high stress on the leads, making them prone to deformation. When using a depth limiter to tighten the electrode leads, the locking screw directly presses down on the leads. Because the contact area of ​​the screw is relatively small, the leads experience significant stress during tightening. This high stress can easily cause deformation, affecting the precise placement of the electrodes in the brain and potentially impacting the surgical outcome. Deformation of the leads can also negatively affect the contact between the electrodes and brain tissue, leading to unstable electrical stimulation signal transmission and impacting treatment effectiveness.

[0005] Secondly, as the pressure exerted by the locking screw on the electrode increases, the screw presses against the surface of the electrode lead, and its rotation can damage the lead surface. During the tightening process, as the pressure on the electrode lead gradually increases, the tip of the screw will come into contact with the lead surface. Because the locking screw needs to rotate to secure the lead, this rotational movement can easily cause scratches or damage to the lead surface. Damage to the electrode surface may not only affect electrical performance but may also trigger biocompatibility issues such as inflammatory reactions, posing a potential threat to the patient's health. Utility Model Content

[0006] The purpose of this utility model is to provide a depth limiter that solves the problem that when the locking screw presses down on the electrode wire to lock it, the electrode wire is under great stress and easily deformed due to the small force-bearing area of ​​the locking screw. In addition, it also solves the problem that as the pressure applied to the electrode wire by the locking screw gradually increases, the locking screw abuts against the surface of the electrode wire and rotates on the surface of the electrode wire, thereby causing damage to the electrode wire.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A depth limiter, comprising:

[0009] The main body includes a first abutting part and a second abutting part, and a clamping space for placing electrode wires is formed between the first abutting part and the second abutting part;

[0010] A locking member, connected to the main body, is capable of pressing the first abutment portion and / or the second abutment portion to press the electrode wire into the clamping space.

[0011] As an alternative to the depth limiter, the first abutment portion and / or the second abutment portion are elastic structures.

[0012] As an alternative to the depth limiter, the first abutment is an elastic structure, one end of the first abutment is connected to the second abutment, and the other end of the first abutment is a free end. The locking member compresses the electrode wire by squeezing the first abutment.

[0013] As an alternative to the depth limiter, the locking member is screwed into the main body, and the locking member is used to press against the first abutment portion.

[0014] As an alternative to the depth limiter, the locking member is screwed into the first abutment portion or the second abutment portion to press the electrode wire.

[0015] As an alternative to the depth limiter, the first abutment portion and / or the second abutment portion are recessed inward to form a limiting groove, and the electrode wire is placed in the limiting groove.

[0016] As an alternative to the depth limiter, multiple limiting grooves are spaced apart, and the radial dimensions of the multiple limiting grooves are different.

[0017] As an alternative to the depth limiter, the locking member penetrates at least a portion of the main body and presses against the first abutment portion or the second abutment portion.

[0018] As an alternative to the depth limiter, the locking member passes through one of the first abutment portion and the second abutment portion, and the locking member is screwed to the other of the first abutment portion and the second abutment portion.

[0019] As an alternative to the depth limiter, the first abutment portion and the second abutment portion are an integral structure.

[0020] Beneficial effects:

[0021] This invention addresses the issue that, during operation, the locking mechanism does not directly contact the electrode wire. Instead, it applies pressure to the first and / or second abutment portions, which then compress the electrode wire. This depth limiter avoids the problem of the locking screw pressing down on the electrode wire, which, due to its small contact area, causes high stress and deformation. This reduces stress, prevents electrode wire deformation, ensures precise placement of the electrode in the brain, guarantees good electrical contact between the electrode and brain tissue, stabilizes electrical stimulation, and improves treatment efficacy. Furthermore, it prevents damage to the electrode wire surface caused by the screw gradually increasing pressure and rotating. This avoids scratches or damage to the electrode wire surface, ensuring its electrical performance and preventing biocompatibility issues such as inflammatory reactions, thus guaranteeing a comfortable implantation experience for the patient. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a depth limiter clamping electrode wire provided in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of a depth limiter provided in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a depth limiter clamping electrode wire provided in Embodiment 2 of this utility model;

[0025] Figure 4 This is a schematic diagram of a depth limiter provided in Embodiment 2 of this utility model.

[0026] In the picture:

[0027] 100. Electrode wire; 200. Clamping space;

[0028] 1. Main body; 11. First abutment part; 111. Limiting groove; 12. Second abutment part;

[0029] 2. Locking components. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] Example 1

[0035] Please see the appendix Figure 1 and attached Figure 2 This embodiment relates to a depth limiter, which includes a main body 1 and a locking member 2. The main body 1 includes a first abutment portion 11 and a second abutment portion 12, and a clamping space 200 for placing an electrode wire 100 is formed between the first abutment portion 11 and the second abutment portion 12. The locking member 2 is connected to the main body 1 and can squeeze the first abutment portion 11 and / or the second abutment portion 12 so that the first abutment portion 11 and the second abutment portion 12 press the electrode wire 100 into the clamping space 200.

[0036] Specifically, the main body 1 is C-shaped and has an opening for inserting the electrode wire 100. The first abutment portion 11 is a flat plate connected to the interior of the C-shaped area of ​​the main body 1. The second abutment portion 12 is disposed opposite to the first abutment portion 11. The second abutment portion 12 can also be a flat plate. A clamping space 200 is formed between the first abutment portion 11 and the second abutment portion 12, allowing the electrode wire 100 to be inserted into the clamping space 200. The locking member 2 can directly compress either the first abutment portion 11 or the second abutment portion 12, or simultaneously compress both, to compress the height of the clamping space 200, thereby pressing the electrode wire 100 placed in the clamping space 200.

[0037] In this embodiment, when the depth limiter is working, the locking member 2 does not directly contact the electrode wire 100. Instead, it applies pressure to the first abutment part 11 and / or the second abutment part 12, and the first abutment part 11 and the second abutment part 12 complete the clamping of the electrode wire 100. Therefore, this depth limiter avoids the problems of high stress and easy deformation of the electrode wire 100 caused by the locking screw pressing down on the electrode wire 100 in the prior art due to the small force-bearing area of ​​the locking screw. This reduces stress, prevents deformation of the electrode wire 100, ensures the accuracy of the electrode implantation position in the brain, ensures good electrical contact between the electrode and brain tissue, stable electrical stimulation, and improves the treatment effect. On the other hand, it also avoids the problem that as the pressure of the locking screw on the electrode wire 100 gradually increases, the locking screw presses against the surface of the electrode wire 100 and rotates on the surface of the electrode wire 100, damaging the surface of the electrode wire 100. This avoids scratches or damage to the surface of the electrode wire 100, ensures the electrical performance of the electrode wire 100, and avoids biocompatibility issues such as inflammatory reactions, thus ensuring the patient's comfort during the implantation surgery.

[0038] Optionally, the first abutting portion 11 and / or the second abutting portion 12 are elastic structures.

[0039] In this embodiment, the first abutment portion 11 and / or the second abutment portion 12 are designed as elastic structures. When the locking member 2 abuts against the first abutment portion 11 and / or the second abutment portion 12, the first abutment portion 11 and / or the second abutment portion 12 undergo elastic deformation, further compressing the height of the clamping space 200. When the locking member 2 releases its pressure on the first abutment portion 11 and / or the second abutment portion 12, the first abutment portion 11 and / or the second abutment portion 12 can return to their state before deformation. This effectively avoids the need for a rigid structure where the first abutment portion 11 and / or the second abutment portion 12 need to displace to maintain the clamping effect, and reduces the use of a reset mechanism for the first abutment portion 11 and / or the second abutment portion 12, thus improving the overall compactness of the depth limiter.

[0040] Optionally, the first abutting part 11 is an elastic structure, one end of the first abutting part 11 is connected to the second abutting part 12, and the other end of the first abutting part 11 is a free end. The locking member 2 presses the electrode wire 100 by squeezing the first abutting part 11.

[0041] The first abutment portion 11 is an elastic flat plate structure. There are various ways to connect one end of the first abutment portion 11 to the second abutment portion 12. Specifically, the first abutment portion 11 and the second abutment portion 12 can be an integral structure to reduce the number of parts and assembly steps; they can also be detachable, such as snap-fit ​​or threaded connection; or they can be non-detachable, such as welding. The specific connection method can be selected comprehensively based on factors such as material type, molding difficulty, and cost control. This embodiment does not impose specific limitations. Furthermore, the other end of the first abutment portion 11 is a free end, forming a cantilever structure. A clamping space 200 is formed between the first abutment portion 11 and the second abutment portion 12 for placing the electrode wire 100.

[0042] Furthermore, the locking member 2 is screwed into the main body 1, and the locking member 2 is used to press the first abutment part 11.

[0043] In this embodiment, the locking member 2 can be a bolt or stud or other screw fastener. The locking member 2 has a threaded hole on the side of the main body 1 relative to the second abutment part 12. The locking member 2 is screwed into the threaded hole. The first abutment part 11 is squeezed by rotating the locking member 2 in the forward direction, and the first abutment part 11 is released by rotating the locking member 2 in the reverse direction. The overall structure is simple and reliable and easy to operate.

[0044] Furthermore, the locking member 2 penetrates at least a portion of the main body 1, and the locking member 2 presses against the first abutting part 11 or the second abutting part 12.

[0045] Specifically, the main body 1 is C-shaped, with the locking member 2 passing through a portion of the main body 1 and threadedly connected to it. By screwing the locking member 2, its end presses against the first abutment part 11, thereby pressing the electrode wire 100 against the first abutment part 11. The overall structure is simple and easy to operate.

[0046] Example 2

[0047] Please see the appendix Figure 3 and attached Figure 4 The difference between this embodiment and the first embodiment is that the locking member 2 can be screwed into the first abutting part 11 or the second abutting part 12 to press the electrode wire 100.

[0048] Optionally, the locking member 2 passes through one of the first abutment portion 11 and the second abutment portion 12, and the locking member 2 is screwed to the other of the first abutment portion 11 and the second abutment portion 12.

[0049] In one implementation of this embodiment, the first abutting part 11 and the second abutting part 12 are arranged opposite to each other. The first abutting part 11 is provided with a through hole, and the locking member 2 passes through the first abutting part 11, so that the second abutting part 12 is screwed to the locking member 2. By rotating the locking member 2 in the forward direction, the second abutting part 12 and the first abutting part 11 can gradually move closer together and realize the pressing of the electrode wire 100. By rotating the locking member 2 in the reverse direction, through the elastic recovery of the second abutting part 12 and the first abutting part 11, the second abutting part 12 and the first abutting part 11 can move away from each other, thereby releasing the pressing of the electrode wire 100.

[0050] In another implementation of this embodiment, the first abutting part 11 and the second abutting part 12 are arranged opposite to each other. A through hole is provided on the second abutting part 12, and the locking member 2 passes through the second abutting part 12, so that the first abutting part 11 is screwed to the locking member 2. By rotating the locking member 2 in the forward direction, the second abutting part 12 and the first abutting part 11 can gradually approach each other and press the electrode wire 100. By rotating the locking member 2 in the reverse direction, the second abutting part 12 and the first abutting part 11 can move away from each other due to the elastic recovery of the second abutting part 12 and the first abutting part 11, thereby releasing the electrode wire 100 from the press.

[0051] Optionally, the first abutting portion 11 and / or the second abutting portion 12 are recessed inward to form a limiting groove 111, and the electrode wire 100 is placed in the limiting groove 111.

[0052] In this embodiment, limiting grooves 111 are formed by recessing inward on the opposing surfaces of the first abutment portion 11 and the second abutment portion 12. The two limiting grooves 111 are arranged opposite to each other to form a limiting space for limiting the electrode wire 100, so that the electrode wire 100 is limited in the direction perpendicular to the axis, preventing the risk of movement when installing the electrode wire 100 and ensuring the stability of the installation and clamping process.

[0053] Optionally, the width of the limiting groove 111 is greater than its depth.

[0054] Specifically, the limiting groove 111 can be a semi-elliptical groove or an approximately semi-elliptical groove, so that the width dimension of the limiting groove 111 is greater than the depth dimension. When the first abutting part 11 and the second abutting part 12 are relatively close to each other to press the electrode wire 100, the electrode wire 100 will produce a certain slight deformation, so that the original electrode wire 100 will produce a slight deformation, which will stretch in the direction of the width dimension of the limiting groove 111 and flatten in the direction of the depth dimension of the limiting groove 111. By making the width dimension of the limiting groove 111 greater than the depth dimension, it can accommodate the slight deformation of the electrode wire 100 after it is pressed, and avoid excessive stress on the electrode wire 100, which would affect the electrical performance of the electrode wire 100.

[0055] Optionally, multiple limit slots 111 are spaced apart.

[0056] This embodiment uses the same depth limiter to limit the movement of multiple electrode wires 100, thus improving adaptability.

[0057] Furthermore, the radial dimensions of the multiple limiting grooves 111 are different.

[0058] By setting multiple limiting grooves 111, and the multiple limiting grooves 111 being different in radial dimension, it can not only accommodate the limiting of multiple electrode wires 100, but also further accommodate the clamping of electrode wires 100 of different sizes and specifications, thereby improving the adaptability and versatility of the entire depth limiter.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A depth limiter, characterized in that, include: The main body (1) includes a first abutting part (11) and a second abutting part (12), and a clamping space (200) for placing an electrode wire (100) is formed between the first abutting part (11) and the second abutting part (12); A locking member (2) is connected to the main body (1). The locking member (2) can squeeze the first abutment (11) and / or the second abutment (12) so that the first abutment (11) and the second abutment (12) press the electrode wire (100) into the clamping space (200).

2. The depth limiter according to claim 1, characterized in that, The first abutting part (11) and / or the second abutting part (12) are elastic structures.

3. The depth limiter according to claim 1, characterized in that, The first abutting part (11) is an elastic structure. One end of the first abutting part (11) is connected to the second abutting part (12). The other end of the first abutting part (11) is a free end. The locking member (2) presses the electrode wire (100) by squeezing the first abutting part (11).

4. The depth limiter according to claim 3, characterized in that, The locking member (2) is screwed into the main body (1), and the locking member (2) is used to press the first abutment part (11).

5. The depth limiter according to claim 1, characterized in that, The locking member (2) is screwed into the first abutment part (11) or the second abutment part (12) to press the electrode wire (100).

6. The depth limiter according to claim 1, characterized in that, The first abutting part (11) and / or the second abutting part (12) are recessed inward to form a limiting groove (111), and the electrode wire (100) is placed in the limiting groove (111).

7. The depth limiter according to claim 6, characterized in that, The plurality of limiting grooves (111) are spaced apart, and the radial dimensions of the plurality of limiting grooves (111) are different.

8. The depth limiter according to claim 1, characterized in that, The locking member (2) penetrates at least a portion of the main body (1), and the locking member (2) presses against the first abutting part (11) or the second abutting part (12).

9. The depth limiter according to claim 1, characterized in that, The locking member (2) passes through one of the first abutment portion (11) and the second abutment portion (12), and the locking member (2) is screwed to the other of the first abutment portion (11) and the second abutment portion (12).

10. The depth limiter according to any one of claims 1-8, characterized in that, The first contact part (11) and the second contact part (12) are an integral structure.

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