Sacral nerve stimulation electrode fixation device

Abstract

The sacral nerve stimulation electrode fixing device comprises a base, a handle assembly connected with the base at a set angle, the handle assembly comprising a first side wall and a second side wall arranged opposite and spaced apart, an electrode clamping mechanism arranged at one end of the handle assembly away from the base, the electrode clamping mechanism comprising a resilient press switch arranged on the first side wall and a clamping slider movable under the drive of the resilient press switch, a clamping space capable of accommodating an electrode being formed between the clamping slider and the second side wall, and the clamping slider being movable under the drive of the resilient press switch to the direction close to or away from the second side wall to realize clamping or releasing the electrode. When the electrode contact reaches the preset nerve target position, the electrode is clamped and fixed by the electrode fixing device, the doctor can remove the introducer sleeve of the introduced electrode alone, the operation experience is better, and meanwhile, the influence of electrode displacement can be reduced and the implantation effect of the electrode is improved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a sacral nerve stimulation electrode fixation device. Background Technology

[0002] A sacral nerve stimulator is an active implantable medical device, mainly consisting of an implantable pulse generator and electrodes. It is commonly used for sacral nerve modulation to treat lower urinary tract dysfunction and related diseases. During sacral nerve stimulation electrode implantation surgery, an auxiliary tool, such as an implantation sleeve, is used to implant the electrode onto the specific sacral nerve. Once the electrode contact reaches the nerve target location, the implantation sleeve is removed. Because the implantation sleeve and electrode have an interference fit, and the electrode is a slender and easily bent structure, the removal of the implantation sleeve often requires the cooperation of two surgeons. One surgeon holds the electrode in the middle, close to the implantation sleeve, while the other hand slowly moves the implantation sleeve along the electrode towards its tip. To ensure the electrode remains relatively straight and stable, a surgeon's assistant also needs to support the electrode tip with one hand.

[0003] Without the aid of electrode fixation tools to provide support and clamping, it is difficult to ensure the electrode position when the surgeon and assistant perform the removal of the implant with their three hands suspended in the air, easily leading to electrode displacement within the body. Currently, in clinical surgeries for sacral nerve modulation both domestically and internationally, there is no specialized auxiliary electrode fixation tool to assist surgeons in successfully removing the implant single-handedly while preventing significant electrode displacement. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the difficulties in removing the implant sleeve and the easy displacement of the electrode during the removal of the implant sleeve in the prior art. Thus, an electrode fixing device is provided, which clamps and fixes the electrode so that the surgeon can remove the implant sleeve by himself, and the electrode will not be displaced during the removal of the implant sleeve.

[0005] To achieve the above objectives, embodiments of the present invention provide an electrode fixing device, comprising:

[0006] The base is designed to be placed on the patient's back to provide support;

[0007] A handle assembly is connected to the base at a predetermined angle, and the handle assembly includes a first sidewall and a second sidewall that are spaced apart from each other.

[0008] An electrode clamping mechanism is disposed at one end of the handle assembly away from the base. The electrode clamping mechanism includes an elastic push switch disposed on the first side wall and a clamping slider that can move under the action of the elastic push switch.

[0009] A clamping space for accommodating electrodes is formed between the clamping slider and the second sidewall. The clamping slider can move towards or away from the second sidewall under the action of an elastic push switch to clamp or release the electrodes.

[0010] Optionally, the clamping slider includes:

[0011] The clamping part has a clamping surface that is parallel to the second sidewall;

[0012] A sliding connection portion, which is adapted to be connected to the elastic push switch and can move along a preset guide rail on the handle assembly toward or away from the second sidewall.

[0013] Optionally, a slide rail groove is provided on one side of the sliding connection portion, and the preset guide rail is a guide rib provided on the handle assembly corresponding to the slide rail groove, and the extending direction of the guide rib is parallel to the moving direction of the clamping slider.

[0014] Optionally, the resilient push-button switch includes:

[0015] The pressing member includes a pressing end located outside the first sidewall and a connecting end adapted to extend into the first sidewall and connect with the clamping slider;

[0016] An elastic reset member is disposed between the pressing member and the first sidewall, the elastic reset member being adapted to apply a force to the pressing member to move away from the second sidewall.

[0017] Optionally, the clamping part is a clamping plate arranged parallel to the second side wall, and the sliding connection part includes a connecting part and a sliding part, wherein the connecting part is connected between the clamping plate and the sliding part;

[0018] The connecting part is a plate with both ends bent. The two ends of the plate are connected to the clamping plate. A limiting space is formed between the middle of the plate and the clamping plate. The connecting end of the pressing member extends into and is locked and limited within the limiting space.

[0019] Optionally, a limiting protrusion structure is provided on the second sidewall at the position corresponding to the clamping part, and the height of the limiting protrusion structure relative to the second sidewall protrusion is slightly smaller than the diameter of the electrode.

[0020] Optionally, the limiting protrusion structure includes a first limiting protrusion and a second limiting protrusion spaced apart along the length of the second sidewall. The second sidewall has a clamping mating surface adapted to the shape and size of the clamping surface. The first limiting protrusion and the second limiting protrusion are distributed at both ends of the clamping mating surface.

[0021] Optionally, the handle assembly includes a front handle shell and a rear handle shell, the rear handle shell having a recessed cavity, and the front handle shell fastening onto the rear handle shell to form an accommodating chamber that can accommodate and limit the clamping slider.

[0022] The handle rear shell includes a first side wall and a second side wall, and a third side wall connected between the first side wall and the second side wall. The third side wall is disposed opposite to the handle front shell and is provided with clearance openings suitable for electrodes to pass through.

[0023] Optionally, the base is provided with a connecting seat for mounting the handle assembly, and the handle assembly is connected to the connecting seat by a bolt assembly;

[0024] The bolt assembly includes an adjusting bolt adapted to be connected and fixed to the handle assembly, and a fastening nut for securing the handle assembly.

[0025] Optionally, the base includes:

[0026] The top surface of the base shell is connected to the bottom end of the handle assembly;

[0027] The lower shell of the base has a large arc surface on the bottom that fits the curve of the human back. The outer periphery of the lower shell of the base and the upper shell of the base are detachably connected by a snap-fit ​​structure, and a hollow cavity structure is formed inside.

[0028] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0029] 1. The electrode clamping mechanism of the electrode fixation device is used to clamp and fix the electrode, and the handle provides support for the surgeon's holding hand. The electrode fixation device provides a relatively stable relationship between the surgeon's holding hand, the electrode, and the patient's back. During the removal of the implant sleeve, the surgeon uses one hand to press the elastic push switch of the electrode fixation device to clamp and fix the electrode, while the other hand removes the implant sleeve. This operation is convenient, quick, and can be completed by a single person, which improves the surgeon's experience; at the same time, it reduces the impact of electrode displacement into the body and improves the electrode implantation effect.

[0030] 2. By providing a limiting protrusion structure on the second sidewall corresponding to the clamping part, the height of the limiting protrusion is slightly smaller than the diameter of the electrode, which can prevent the electrode from being over-clamped and damaged, and play a limiting protection role. In addition, by providing a first limiting protrusion and a second limiting protrusion spaced apart along the length direction of the second sidewall, the electrode is positioned between the first limiting protrusion and the second limiting protrusion, which can avoid the clamping surface tilting against the limiting protrusion when a single limiting protrusion is provided, which would squeeze the electrode, thus providing better protection and safety.

[0031] 3. By setting two slide rail grooves at the bottom of the sliding connection part on the clamping slider, and setting two guide ribs on the handle assembly corresponding to the two slide rail grooves as preset guide rails, the clamping slider can move along the preset guide rails in the direction of approaching or moving away from the second side wall. The double-slot sliding design improves the stability of the movement of the clamping slider.

[0032] 4. By setting a recess in the rear shell of the handle, the front shell of the handle is fastened to the rear shell of the handle to form a receiving chamber that can accommodate and limit the clamping slider, thereby limiting the clamping slider, improving the stability of the clamping slider, avoiding the clamping slider from being exposed, preventing rust, and also improving the appearance; at the same time, the fastening installation design of the front shell and the rear shell of the handle makes installation and disassembly convenient.

[0033] 5. By providing clearance openings on the third side wall of the handle rear shell and the handle front shell opposite to it, the electrodes can pass through, thus preventing interference between the handle front shell and handle rear shell and the electrodes during clamping.

[0034] 6. The handle assembly is connected to the connecting seat of the base by a bolt assembly, which facilitates the disassembly and installation of the handle assembly and also makes it easy to adjust the angle of the handle assembly. Before surgery, the doctor can adjust the bolt assembly as needed to adjust the angle between the handle assembly and the base to better adapt to and fix electrodes at different angles.

[0035] 7. The base's lower shell has a large arc surface that fits the curve of the human back, allowing it to be placed on the patient's back to provide a relatively stable support surface. At the same time, the lower shell of the base is detachably connected to the outer periphery of the base through a snap-fit ​​structure, and a hollow cavity structure is formed inside. The hollow cavity structure can reduce the weight of the base, thereby reducing the pressure on the patient's back and improving the patient's treatment experience. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the electrode fixing device fixing the electrode on the patient's back in an embodiment of the present invention.

[0038] Figure 2 This is a front view of the electrode fixing device in an embodiment of the present invention.

[0039] Figure 3 This is a side view of the electrode fixing device in an embodiment of the present invention.

[0040] Figure 4 This is a top view of the electrode fixing device in an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the structure of the electrode fixing device in the embodiment of the present invention, where the electrode is fixed but not clamped.

[0042] Figure 6 This is a schematic diagram of the electrode fixing device in the state of clamping the electrode in an embodiment of the present invention.

[0043] Figure 7 As described in the embodiments of the present invention Figure 6 An enlarged schematic diagram of the limiting protrusion structure protecting the electrode.

[0044] Figure 8 This is an exploded view of the electrode fixing device in an embodiment of the present invention.

[0045] Figure 9 This is a schematic diagram of the handle assembly in an embodiment of the present invention.

[0046] Figure 10 This is a schematic diagram of the assembly of the handle assembly and the electrode clamping mechanism in an embodiment of the present invention.

[0047] Figure 11 As described in the embodiments of the present invention Figure 10 A cross-sectional view of the electrode fixing device.

[0048] Figure 12 This is a structural diagram of the slider clamping device in an embodiment of the present invention.

[0049] Figure 13 This is a front view of the slider clamping device in an embodiment of the present invention.

[0050] Figure 14 As described in the embodiments of the present invention Figure 10 A cross-sectional view of the electrode fixing device at the BB section when the elastic push switch is not pressed.

[0051] Figure 15 As described in the embodiments of the present invention Figure 10 A cross-sectional view of the electrode fixing device at the BB section when the elastic push switch is pressed.

[0052] Figure 16 This is an axial top view of the upper shell of the base in an embodiment of the present invention.

[0053] Figure 17 This is an axial bottom view of the upper shell of the base in an embodiment of the present invention.

[0054] Figure 18 This is an axial top view of the lower shell of the base in an embodiment of the present invention.

[0055] Figure 19 This is an axial bottom view of the lower shell of the base in an embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 100. Electrode fixing device;

[0058] 1. Base; 11. Connecting seat; 12. Upper shell of base; 13. Lower shell of base;

[0059] 2. Handle assembly; 21. First sidewall; 211. Molded structure; 22. Second sidewall; 23. Guide rib; 24. Limiting protrusion structure; 241. First limiting protrusion; 242. Second limiting protrusion; 25. Handle front shell; 26. Handle rear shell; 261. Third sidewall; 262. Clearance opening; 27. Mounting groove;

[0060] 3. Electrode clamping mechanism; 31. Elastic push switch; 311. Pressing element; 3111. Pressing end; 3112. Connecting end; 312. Elastic reset element; 313. Limiting nut; 32. Clamping slider; 321. Clamping part; 322. Sliding connecting part; 3221. Connecting part; 3222. Sliding part; 33. Slide rail groove;

[0061] 4. Bolt assembly; 41. Adjusting bolt; 42. Fastening nut;

[0062] 200. Electrode;

[0063] 300. Importer set. Detailed Implementation

[0064] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0066] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0068] like Figures 1 to 19 As shown, an embodiment of the present invention provides an electrode fixing device 100, which includes a base 1, a handle assembly 2, and an electrode clamping mechanism 3.

[0069] Specifically, the base 1 is adapted to be placed on the patient's back to provide support; the handle assembly 2 is connected to the base 1 at a set angle, and the handle assembly 2 includes a first sidewall 21 and a second sidewall 22 that are spaced apart from each other.

[0070] Furthermore, the electrode clamping mechanism 3 is located at the end of the handle assembly 2 away from the base 1. The electrode clamping mechanism 3 includes an elastic push switch 31 disposed on the first side wall 21 and a clamping slider 32 that can move under the action of the elastic push switch 31. A clamping space for accommodating the electrode 200 is formed between the clamping slider 32 and the second side wall 22. The clamping slider 32 can move towards or away from the second side wall 22 under the action of the elastic push switch 31 to clamp or release the electrode 200.

[0071] With this design, the electrode clamping mechanism 3 of the electrode fixation device 100 is used to clamp and fix the electrode 200, and the handle is used to provide support for the doctor's holding hand. The electrode fixation device 100 provides a relatively stable relationship between the doctor's holding hand, the electrode 200, and the patient's back. During the removal of the implant sleeve 300, the surgeon holds the elastic push switch 31 of the electrode fixation device 100 with one holding hand, and removes the implant sleeve 300 with the other operating hand. This operation is convenient, quick, and can be completed by a single person, which helps to improve the doctor's operating experience; at the same time, it can reduce the impact of electrode 200 displacement into the body and improve the implantation effect of electrode 200.

[0072] In this embodiment, the clamping slider 32 includes a clamping part 321 and a sliding connecting part 322.

[0073] Specifically, the clamping part 321 has a clamping surface that is parallel to the second sidewall 22. The sliding connection part 322 is adapted to be connected to the resilient push switch 31 and can move along a preset guide rail on the handle assembly 2 toward or away from the second sidewall 22.

[0074] Optionally, a slide rail groove 33 is provided on one side of the sliding connection part 322, and a preset guide rail is a guide rib 23 provided on the handle assembly 2 corresponding to the slide rail groove 33. The extending direction of the guide rib 23 is parallel to the moving direction of the clamping slider 32.

[0075] Preferably, there are multiple slide rail grooves 33 and multiple corresponding guide ribs 23 to improve the stability of the fit. More preferably, in this embodiment, there are two slide rail grooves 33 and two guide ribs 23. The double-slot sliding design of the sliding connection 322 improves the smoothness of the movement of the clamping slider 32. Of course, those skilled in the art can adjust the number of slide rail grooves 33 and corresponding guide ribs 23 according to the actual situation, and this embodiment does not limit this.

[0076] In this embodiment, the elastic push switch 31 includes a pressing member 311 and an elastic reset member 312.

[0077] Specifically, the pressing member 311 includes a pressing end 3111 located outside the first sidewall 21 and a connecting end 3112 adapted to extend into the first sidewall 21 and connect with the clamping slider 32.

[0078] Furthermore, the elastic reset member 312 is disposed between the pressing member 311 and the first sidewall 21, and the elastic reset member 312 is adapted to apply a force to the pressing member 311 to move away from the second sidewall 22.

[0079] Optionally, the first sidewall 21 is provided with a mounting groove 27 suitable for mounting the elastic push switch 31, and the elastic reset member 312 is disposed between the inner wall of the mounting groove 27 and the pressing end 3111.

[0080] Optionally, the first sidewall 21 is recessed towards the second sidewall 22 to form a mounting groove 27, and the bottom wall of the mounting groove 27 is provided with a mounting through hole into which the connecting end 3112 of the pressing member 311 can extend.

[0081] Preferably, the pressing member 311 is a pressing bolt with a set length, and the mounting groove 27 is a cylindrical groove.

[0082] Optionally, the elastic reset member 312 is a compression spring that is compressed between the inner wall of the mounting groove 27 and the inner side of the pressing end 3111, and is adapted to apply an elastic thrust to the pressing member 311 to move away from the second side wall 22.

[0083] Optionally, the pressing end 3111 of the pressing member 311 includes a limiting abutment portion and a pressing portion with an increased outer diameter. The limiting abutment portion is located near the elastic reset member 312. The pressing portion includes a pressing member 311 body with a predetermined extension length. The limiting abutment portion is an annular boss structure provided on the end of the pressing member 311 body. The elastic reset member 312 compresses and abuts against the mounting groove 27 and the limiting abutment portion. The outer diameter of the limiting abutment portion is slightly smaller than the diameter of the mounting groove 27, so that when the pressing member 311 is pressed, the limiting abutment portion can move relative to the axis of the mounting groove 27 within the mounting groove 27, thereby increasing the range of motion of the pressing member 311. The pressing portion is located outside the mounting groove 27 and its outer diameter is larger than the diameter of the mounting groove 27.

[0084] Preferably, the pressing part has a disc-shaped structure for easy pressing.

[0085] Preferably, an arc-shaped transition chamfer is provided between the pressing part and the limiting abutment part, which can reduce the shear stress at the connection and extend the service life of the pressing part 311.

[0086] With this design, pressing the pressing member 311 causes the connecting end 3112 of the pressing member 311 to drive the clamping slider 32 to move closer to the second sidewall 22, clamping the electrode 200. At the same time, the elastic reset member 312 is shortened by pressure. When the pressure on the pressing member 311 is released, the elastic reset member 312 returns to its original length under the action of its own elastic force, and drives the pressing member 311 to move and reset away from the second sidewall 22.

[0087] In this embodiment, the clamping part 321 is a clamping plate arranged parallel to the second side wall 22, and the sliding connection part 322 includes a connecting part 3221 and a sliding part 3222, with the connecting part 3221 connecting between the clamping plate and the sliding part 3222.

[0088] Optionally, such as Figures 12 to 15 As shown, the connecting part 3221 is a plate with both ends bent. The two ends of the plate are connected to the clamping plate, and a limiting space is formed between the middle of the plate and the clamping plate. The connecting end 3112 of the pressing member 311 extends into and is locked and limited in the limiting space.

[0089] Optionally, an arch-shaped clearance groove is provided at the position of the mounting through hole on the bottom wall of the mounting groove 27 at the lower edge of the plate. The diameter of the arch-shaped clearance groove is slightly larger than the diameter of the connecting end 3112 of the pressing member 311, so that the connecting end 3112 can pass through the inner wall of the mounting groove 27 and the arch-shaped clearance groove on the plate and extend into the limiting space.

[0090] Optionally, such as Figure 12 , Figure 13 , Figure 14As shown, at least the connecting end 3112 of the pressing member 311 is threaded. The connecting end 3112 extends into the limiting space and is connected to the connecting end 3112 by a limiting nut 313 disposed in the limiting space, thereby locking and limiting the pressing member 311 within the limiting space. After the pressing member 311 is connected to the limiting nut 313, it is installed as a whole into the limiting space of the connecting part 3221. The upper half of the limiting nut 313 is locked and limited on the inner side of the connecting part 3221, which is suitable for limiting the connection of the pressing member 311.

[0091] like Figure 12 , Figure 13 , Figure 15 As shown, when the pressing member 311 is pressed, the pressing member 311 drives the limiting nut 313 to move towards the clamping part 321 and presses against the clamping part 321, thereby pushing the clamping part 321 towards the second side wall 22 to clamp the electrode 200. Figure 14 As shown, when the pressing member 311 is released, the pressing member 311 and the limiting nut 313 move away from the clamping part 321 under the action of the elastic reset member 312. The limiting nut 313 is locked and limited on the connecting part 3221, thereby realizing that the clamping part 321 can be automatically pulled away from the second side wall 22 under the action of the elastic reset member 312, and the electrode 200 is released.

[0092] With this design, the connecting end 3112 of the pressing member 311 is connected to the sliding connecting part 322. By pressing or releasing the pressing end 3111 of the pressing member 311, the connecting end 3112 can drive the clamping slider 32 to move closer to or away from the second side wall 22. The pressing member 311 is connected to the sliding connecting part 322, and the positioning is stable and easy to operate.

[0093] Preferably, in this embodiment, instead of opening a circumferentially closed through hole or clearance groove structure on the plate, an arch-shaped clearance groove is provided on the lower edge of the plate for the pressing member 311 to extend into. The arch-shaped clearance groove adopts a non-closed design, which facilitates the installation and removal of the limiting nut 313 in the limiting space, and facilitates the assembly or disassembly of the pressing member 311 and the clamping slider 32.

[0094] Optionally, the sliding part 3222 includes an "n"-shaped slider body. The slider body includes two slider sidewalls arranged opposite each other. The slider sidewalls have a set thickness. An arch-shaped slide rail groove 33 is provided on the bottom end surface of the slider sidewall. The extension direction of the slide rail groove 33 is parallel to the moving direction of the slider 32.

[0095] Optionally, the end face of the slider body near the second side wall 22 is connected to the connecting part 3221, and the other end face is adapted to abut against the inner side of the first side wall 21 to limit the clamping slider 32.

[0096] Preferably, the circumferential edge of the other end face of the slider body extends circumferentially to form an arch-shaped side plate, thereby increasing the contact area with the first side wall 21 and improving the stability of the limiting position.

[0097] Preferably, the first sidewall 21 is forged into an inwardly recessed profile 211 in the direction close to the second sidewall 22. An installation groove 27 is formed on the inner side of the profile 211. The inner diameter of the "n"-shaped opening of the slider body is larger than the outer diameter of the profile 211, so as to avoid interference between the profile 211 and the sliding part 3222 when the sliding part 3222 is in motion.

[0098] In this embodiment, a limiting protrusion structure 24 is provided on the second sidewall 22 at the position corresponding to the clamping part 321. The height of the limiting protrusion structure 24 relative to the second sidewall 22 is slightly smaller than the diameter of the electrode 200.

[0099] By using the limiting protrusion structure 24, when the doctor presses the elastic press switch 31, the clamping part 321 of the electrode clamping mechanism 3 moves close to the second side wall 22 to clamp the electrode 200. By increasing the pressing force, the clamping force on the electrode 200 is increased until the clamping surface of the clamping part 321 contacts and abuts against the limiting protrusion structure 24. At this point, the clamping force cannot be increased further, thereby preventing the electrode 200 from being over-clamped and damaged, and playing a limiting protection role.

[0100] Optionally, the limiting protrusion structure 24 includes a first limiting protrusion 241 and a second limiting protrusion 242 spaced apart along the length of the second sidewall 22. The second sidewall 22 has a clamping mating surface adapted to the shape and size of the clamping surface. The first limiting protrusion 241 and the second limiting protrusion 242 are distributed at both ends of the clamping mating surface. By using the first limiting protrusion 241 and the second limiting protrusion 242 spaced apart along the length of the second sidewall 22, the electrode 200 is positioned between the first limiting protrusion 241 and the second limiting protrusion 242. This avoids the clamping surface from tilting and abutting against the limiting protrusion when a single limiting protrusion is provided, which would squeeze the electrode 200, resulting in better protection and greater safety.

[0101] Preferably, the first limiting protrusion 241 and the second limiting protrusion 242 are set to the same protrusion height to ensure uniform force distribution.

[0102] By setting the first limiting protrusion 241 and the second limiting protrusion 242 to the same protrusion height, it can be ensured that the clamping surface and the second side wall 22 remain parallel when the clamping surface abuts against the limiting protrusion. The first limiting protrusion 241 and the second limiting protrusion 242 jointly bear the pressure from the clamping part 321, ensuring the uniformity of the force.

[0103] Optionally, the first limiting protrusion 241 is a flange structure formed by bending and extending the upper edge of the second sidewall 22 toward the first sidewall 21, and the second limiting protrusion 242 is a long strip-shaped protrusion provided on the inner side of the second sidewall 22, the length of which is adapted to the width of the second sidewall 22.

[0104] Optionally, the first limiting protrusion 241 and the second limiting protrusion 242 are integrally formed with the second sidewall 22.

[0105] In this embodiment, the handle assembly 2 includes a handle front shell 25 and a handle rear shell 26.

[0106] Specifically, the handle rear shell 26 has a recessed cavity, and the handle front shell 25 is fastened to the handle rear shell 26 to form a receiving chamber that can accommodate the limiting clamping slider 32.

[0107] This design, by setting a cavity in the handle rear shell 26, allows the handle front shell 25 to be fastened onto the handle rear shell 26, forming a receiving chamber that can accommodate the limiting clamping slider 32, thereby limiting the clamping slider 32, improving the stability of the clamping slider 32, and preventing the clamping slider 32 from being exposed; at the same time, the fastening installation design of the handle front shell 25 and handle rear shell 26 makes installation and disassembly convenient.

[0108] Furthermore, the handle rear shell 26 includes a first side wall 21 and a second side wall 22, and a third side wall 261 connected between the first side wall 21 and the second side wall 22. The third side wall 261 is disposed opposite to the handle front shell 25 and is provided with a clearance opening 262 suitable for the electrode 200 to pass through.

[0109] Optionally, the clearance opening 262 is an elongated notch formed on the third side wall 261 and the front cover 25 of the handle, close to the second side wall 22. The width of the clearance opening 262 is greater than the diameter of the electrode 200. With this design, by providing clearance openings 262 on the third side wall 261 of the rear cover 26 of the handle and on the front cover 25 of the handle opposite to it, the electrode 200 can pass through, preventing interference between the front cover 25 and the rear cover 26 of the handle and the electrode 200 during clamping.

[0110] Optionally, such as Figures 10 to 13 As shown, in this embodiment, the side of the clamping slider 32 with the slide rail groove 33 faces the third side wall 261, and the third side wall 261 is provided with a guide rib 23, the extension direction of the guide rib 23 being parallel to the width direction of the third side wall 261.

[0111] Optionally, reinforcing ribs are provided at intervals on the handle rear shell 26 to improve the strength and rigidity of the handle assembly 2, making it less prone to deformation or damage and extending the service life of the handle assembly 2.

[0112] Optionally, two guide ribs 23 are arranged at a predetermined interval on the third side wall 261 of the handle rear shell 26, and correspond one-to-one with the two slide rail grooves 33 on the sliding connection part 322. By extending the guide ribs 23 on the third side wall 261 of the handle rear shell 26, the stability of the guide ribs 23 and the smoothness of the movement of the clamping slider 32 are enhanced.

[0113] In this embodiment, the base 1 is provided with a connecting seat 11 for mounting the handle assembly 2, and the handle assembly 2 is rotatably connected to the connecting seat 11 by a bolt assembly 4; the bolt assembly 4 includes an adjusting bolt 41 adapted to be connected and fixed to the handle assembly 2 and a fastening nut 42 for fixing the handle assembly 2.

[0114] Optionally, the connecting seat 11 includes a first connecting sidewall and a second connecting sidewall disposed opposite to each other, and the lower end of the handle assembly 2 is placed between the first connecting sidewall and the second connecting sidewall. The first connecting sidewall, the second connecting sidewall, and the handle assembly 2 are provided with corresponding connecting holes. The adjusting bolt 41 passes through the connecting holes on the connecting seat 11 and the handle assembly 2 in sequence. By tightening the adjusting bolt 41 and the fixing nut, the connecting seat 11 clamps and fixes the handle assembly 2.

[0115] By rotating the adjusting bolt 41 and the fastening nut 42 in opposite directions, the clamping force of the connecting seat 11 on the handle assembly 2 is loosened, and the angle between the handle assembly 2 and the base 1 can be adjusted. Then, the adjusting bolt 41 and the fastening nut 42 are tightened in opposite directions to make the connecting seat 11 clamp and fix the handle assembly 2, thereby achieving fixation at that angle.

[0116] Optionally, the fastening nut 42 is a high-head knurled nut, but other types of nuts are also possible; this embodiment does not limit this.

[0117] This design allows the handle assembly 2 to be connected to the connecting seat 11 of the base 1 via the bolt assembly 4. This facilitates the disassembly and installation of the handle assembly 2 and the adjustment of the angle between the handle assembly 2 and the base 1. Before surgery, the doctor can adjust the bolt assembly 4 as needed to adjust the angle between the handle assembly 2 and the base 1 to better accommodate and fix electrodes 200 at different angles.

[0118] Optionally, the handle assembly 2 and the base 1 are connected to form a C-shaped frame structure, which has good stability.

[0119] In this embodiment, the base 1 includes an upper base shell 12 and a lower base shell 13.

[0120] Specifically, the top surface of the upper shell 12 of the base is connected to the bottom end of the handle assembly 2; the bottom surface of the lower shell 13 of the base is a large arc surface that fits the curve of the human back; the outer periphery of the lower shell 13 of the base and the upper shell 12 of the base are detachably connected by a snap-fit ​​structure, and a hollow cavity structure is formed inside.

[0121] This design, with the bottom surface of the base shell 13 being a large arc surface that fits the curve of the human back, allows it to be placed on the patient's back to provide a relatively stable support surface. At the same time, the base shell 13 is detachably connected to the outer periphery of the base 1 through a snap-fit ​​structure, and a hollow cavity structure is formed inside. The hollow cavity structure can reduce the weight of the base 1, thereby reducing the pressure on the patient's back and improving the patient's treatment experience.

[0122] Optionally, the bottom surface of the upper shell 12 and the top surface of the lower shell 13 are respectively provided with transverse ribs and / or longitudinal ribs. By providing transverse ribs and / or longitudinal ribs, the strength of the base 1 can be improved to provide more stable support.

[0123] Optionally, the procedure for removing the implant sleeve 300 using the electrode fixation device 100 during surgery is as follows: First, the electrode fixation device 100, with its angle adjusted, is stably placed on the patient's back. One of the doctor's holding hands presses down on the electrode fixation device 100 to provide stable support, while the thumb of the holding hand elastically presses the pressing end 3111 of the switch 31 to clamp and fix the electrode 200. Then, the doctor's other hand slowly removes the implant sleeve 300 along the electrode 200. If there is not enough space for the implant sleeve 300 to exit, the pressing end 3111 is released to release the clamping of the electrode 200. The position of the electrode fixation device 100 is adjusted in real time, and the above operation is repeated until the implant sleeve 300 is completely removed.

[0124] The electrode fixation device 100 in this embodiment of the invention can assist in supporting and clamping the stimulation electrode during sacral nerve stimulation electrode implantation surgery, helping the surgeon to successfully remove the implantation device sleeve alone, while avoiding significant electrode displacement. Furthermore, it is understood that this electrode fixation device can also be used in other scenarios requiring auxiliary support and clamping of the electrode; and in other specific scenarios, the electrode fixation device can also clamp other types of electrodes.

[0125] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An electrode fixing device, characterized in that, include: The base (1) is adapted to be placed on the patient's back to provide support; The handle assembly (2) is connected to the base (1) at a set angle. The handle assembly (2) includes a first sidewall (21) and a second sidewall (22) that are spaced apart from each other. An electrode clamping mechanism (3) is disposed at one end of the handle assembly (2) away from the base (1). The electrode clamping mechanism (3) includes an elastic push switch (31) disposed on the first side wall (21) and a clamping slider (32) that can move under the action of the elastic push switch (31). The clamping slider (32) and the second side wall (22) form a clamping space that can accommodate the electrode (200). The clamping slider (32) can move towards or away from the second side wall (22) under the action of the elastic push switch (31) to clamp or release the electrode (200). The elastic push-button switch (31) includes a pressing member (311) and an elastic reset member (312). The pressing member (311) includes a pressing end (3111) located outside the first sidewall (21) and a connecting end (3112) adapted to extend into the first sidewall (21) and connect to the clamping slider (32). The elastic reset member (312) is adapted to apply a force to the pressing member (311) to move in a direction away from the second sidewall (22).

2. The electrode fixing device according to claim 1, characterized in that, The clamping slider (32) includes: The clamping part (321) has a clamping surface that is parallel to the second side wall (22); A sliding connection (322) is adapted to be connected to the elastic push switch (31) and can move along a preset guide rail on the handle assembly (2) toward or away from the second sidewall (22).

3. The electrode fixing device according to claim 2, characterized in that, A slide rail groove (33) is provided on one side of the sliding connection part (322). The preset guide rail is a guide rib (23) provided on the handle assembly (2) corresponding to the slide rail groove (33). The extending direction of the guide rib (23) is parallel to the moving direction of the clamping slider (32).

4. The electrode fixing device according to claim 2, characterized in that, The elastic reset member (312) is disposed between the pressing member (311) and the first sidewall (21).

5. The electrode fixing device according to claim 4, characterized in that, The clamping part (321) is a clamping plate arranged parallel to the second side wall (22), and the sliding connection part (322) includes a connecting part (3221) and a sliding part (3222), wherein the connecting part (3221) is connected between the clamping plate and the sliding part (3222); The connecting part (3221) is a plate with both ends bent. The two ends of the plate are connected to the clamping plate. A limiting space is formed between the middle of the plate and the clamping plate. The connecting end (3112) of the pressing member (311) extends into and is locked and limited in the limiting space.

6. The electrode fixing device according to claim 2, characterized in that, A limiting protrusion structure (24) is provided on the second sidewall (22) at the position corresponding to the clamping part (321). The height of the limiting protrusion structure (24) relative to the second sidewall (22) is less than the diameter of the electrode (200).

7. The electrode fixing device according to claim 6, characterized in that, The limiting protrusion structure (24) includes a first limiting protrusion (241) and a second limiting protrusion (242) spaced apart along the length direction of the second sidewall (22). The second sidewall (22) has a clamping mating surface adapted to the shape and size of the clamping surface. The first limiting protrusion (241) and the second limiting protrusion (242) are distributed at both ends of the clamping mating surface.

8. The electrode fixing device according to claim 7, characterized in that, The handle assembly (2) includes a front handle shell (25) and a rear handle shell (26). The rear handle shell (26) has a recessed cavity. The front handle shell (25) is fastened to the rear handle shell (26) to form a receiving chamber that can accommodate and limit the clamping slider (32). The handle rear shell (26) includes a first side wall (21) and a second side wall (22) and a third side wall (261) connected between the first side wall (21) and the second side wall (22). The third side wall (261) is disposed opposite to the handle front shell (25) and is provided with a clearance opening (262) suitable for the electrode (200) to pass through.

9. The electrode fixing device according to claim 8, characterized in that, The base (1) is provided with a connecting seat (11) for mounting the handle assembly (2), and the handle assembly (2) is connected to the connecting seat (11) by a bolt assembly (4); The bolt assembly (4) includes an adjusting bolt (41) adapted to be connected and fixed to the handle assembly (2) and a fastening nut (42) for fixing the handle assembly (2).

10. The electrode fixing device according to any one of claims 1-9, characterized in that, The base (1) includes: The top surface of the base upper shell (12) is connected to the bottom end of the handle assembly (2); The lower shell of the base (13) has a large arc surface on the bottom that fits the curve of the human back. The outer periphery of the lower shell of the base (13) and the upper shell of the base (12) are detachably connected by a snap-fit ​​structure, and a hollow cavity structure is formed inside.

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