Electrode fixing device

Abstract

The present invention relates to an electrode fixing device, which belongs to the technical field of deep brain stimulation medical devices, and solves the problems in the prior art that the electrode fixing device has inaccurate electrode positioning and poor stability, cumbersome assembly procedures, and uneven clamping positions that are easy to loosen. The electrode fixing device of the present invention includes a base and a rotating clamping assembly, and the rotating clamping assembly includes a locking ring and a plurality of locking plates; the locking ring and the plurality of locking plates are arranged on the base, and the plurality of locking plates extend or retract in the space surrounded by the base and the locking ring. The present invention is small in size and easy to operate. It does not require on-site assembly of the locking device when used in surgery, which reduces the assembly procedures of the operator and reduces the accidental pulling of the electrode during on-site assembly of the component, thereby improving the accuracy and stability of electrode positioning.

Description

Technical Field

[0001] The present invention relates to the technical field of deep brain stimulation medical devices, and in particular to an electrode fixing device. Background Art

[0002] The deep brain stimulation system is a type of implantable neurostimulation system, which mainly includes a pulse generator and electrodes implanted in the body. During the electrode implantation surgery, the positioning accuracy and positioning stability of the electrode are crucial, and the electrode fixing device is the key to solving the above problems.

[0003] The electrode fixing base and the electrode locking clamp of the existing electrode fixing device are separately set. When in use, the electrode fixing base is first fixed in the skull bone hole, and then the electrode is inserted into the bone hole, and then the electrode locking clamp is assembled to the electrode fixing base, and then the electrode locking clamp is locked with a tool to fix the electrode. In the aforementioned assembly process, the electrode locking clamp may be pulled during the post-assembly process, affecting the accuracy and stability of the electrode implantation position, affecting the surgical effect and increasing the doctor's assembly procedures.

[0004] In addition, the existing electrode locking clamp uses a pliers structure, which clamps the electrode from both sides when locking it. This clamping method locks the root of the electrode clamped by the electrode locking clamp tightly, but the root that is not clamped is locked loosely, and there is a greater risk of loosening. Summary of the invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide an electrode fixing device to solve the problems of inaccurate electrode positioning and poor stability, complicated assembly procedures, and uneven clamping positions that are easy to loosen in existing electrode fixing devices.

[0006] The present invention provides an electrode fixing device, comprising a base and a rotating clamping assembly, wherein the rotating clamping assembly comprises a locking ring and a plurality of locking plates; the locking ring and the plurality of locking plates are arranged on the base, and the plurality of locking plates extend or retract in the space enclosed by the base and the locking ring.

[0007] Optionally, a plurality of locking sheets are located below the locking ring.

[0008] Optionally, the base includes a side wall; a first inner boss is disposed at the bottom end of the inner side wall of the side wall; and a plurality of locking sheets are disposed on the upper surface of the first inner boss.

[0009] Optionally, the inner side wall of the side wall is further provided with a second inner boss; the first inner boss is located below the second inner boss.

[0010] Optionally, one end of the locking sheet is axially rotatably disposed on the upper surface of the first inner boss via a rotating shaft.

[0011] Optionally, a locking ring limit buckle is provided on the inner side wall of the side wall; the locking ring limit buckle is located above the second inner boss; and the locking ring has a plurality of locking ring limit grooves distributed circumferentially.

[0012] Optionally, the electrode fixing device further comprises a cover, and a buckle is provided on an edge of the cover; the buckle is used for fixing and locking with the base.

[0013] Optionally, the buckle is provided with a tongue; and a card is provided at the lower end of the tongue.

[0014] Optionally, the cover edge is further provided with a plurality of pressing sheets.

[0015] Optionally, a deformation groove is further included, and the deformation groove is located on the lower end surface of the fixing portion.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] (1) The electrode fixing device of the present invention can realize the positioning, clamping, positioning and release of the electrode by rotating the clamping assembly, and has a small size and is easy to operate;

[0018] (2) The rotary clamping assembly of the electrode fixing device of the present invention is provided with a locking ring and a plurality of locking plates. The plurality of locking plates are synchronously extended or retracted under the rotation of the locking ring, and can be synchronously locked from multiple directions, thereby improving the accuracy and stability of electrode positioning;

[0019] (3) The sizes of the locking ring limit groove and the locking plate of the electrode fixing device of the present invention are closely matched, which improves the tightness of the locking process and can adapt to the particularity of deep brain electrical stimulation surgery. Under the premise of ensuring the doctor's surgical operation field of view, the size of the entire fixing device is further reduced. Only a smaller bone hole needs to be opened to obtain a fixing device that is easy to operate, has good stability, and accurate positioning;

[0020] (4) The rotating clamping assembly of the electrode fixing device described in the present invention is always stuck and fixed on the base, and there is no need to assemble the base and the locking device on site during surgical use, which reduces the assembly procedures for operators and reduces the risk of accidental pulling of the electrode when the component is stuck on site, thereby improving the accuracy and stability of electrode positioning.

[0021] (5) The deformation groove of the electrode fixing device described in the present invention is located at the lower end surface of the fixing part, thereby reducing the risk of human tissue growing into the deformation groove or fluid accumulation in the deformation groove.

[0022] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0024] Figure 1 is a structural schematic diagram of an electrode fixing device in a specific embodiment;

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 is a cross-sectional view of a base and a rotating clamping assembly of a specific embodiment;

[0027] Figure 4 It is a structural schematic diagram of a base and a locking piece of a specific embodiment;

[0028] Figure 5 A bottom view of the locking piece of a specific embodiment when locked;

[0029] Figure 6 An exploded view of an electrode fixing device according to a specific embodiment;

[0030] Figure 7 A schematic diagram of the state change of the locking piece from the open state to the locked state in a specific embodiment;

[0031] Figure 8 is a schematic structural diagram of a cover in a specific embodiment;

[0032] Fig. 9 It is a bottom view of the base of a specific embodiment.

[0033] Reference numerals:

[0034] 1-base; 2-locking ring; 3-locking plate; 4-cover; 5-rotating shaft; 6-handle; 7-slide groove; 8-vertical groove; 9-annular groove; 10-limiting protrusion;

[0035] 11-side wall; 12-fixing part; 13-wire groove; 14-card slot; 15-locking ring limit buckle; 16-first inner boss; 17-deformation groove; 21-locking ring limit groove; 22-rotation card hole; 23-guide groove; 41-card; 42-card. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0039] Example 1

[0040] A specific embodiment of the present invention, as Figure 1-9 As shown, an electrode fixing device is disclosed, one end of the electrode is connected to a pulse generator, and the other end is inserted into the brain for stimulation treatment, and is used in a deep brain electrical stimulation system. The electrode fixing device includes a base 1 and a rotating clamping assembly, and the clamping positioning and loosening of the electrode are achieved by rotating the rotating clamping assembly.

[0041] Compared with the prior art, the electrode fixing device provided in this embodiment positions, clamps and releases the electrode by rotating the clamping assembly, and is compact in size and easy to operate. It does not require on-site assembly of the base and the locking device during surgical use, which reduces the assembly procedures for operators and reduces the risk of the component getting stuck on-site and accidentally pulling the electrode, thereby improving the accuracy and stability of electrode positioning.

[0042] Optionally, the rotary clamping assembly includes a locking ring 2 and a plurality of locking plates 3; the locking ring 2 and the plurality of locking plates 3 are arranged on the base 1, the plurality of locking plates 3 are located below the locking ring 2, and the locking plates 3 are telescopically arranged in the space surrounded by the base 1 and the locking ring 2. The rotary clamping assembly can be assembled on the base 1 without falling off to form an electrode fixing device, which is then placed in the bone hole and on the outer surface of the bone hole to fix the electrode.

[0043] Optionally, the base 1 includes a side wall 11 and a fixing portion 12 extending outward from the top of the side wall 11. The side wall 11 is cylindrical and forms an axial through hole; the upper end surface of the fixing portion 12 is evenly penetrated with a plurality of wire grooves 13 along the extending direction of the fixing portion 12, and one end of the wire groove 13 partially penetrates the side wall 11. Preferably, four wire grooves 13 are provided. When in use, the electrode fixed by the locking piece 3 passes through the fixing device from the wire groove 13, and the electrode is not higher than the upper surface of the fixing portion 12 after being placed in the wire groove 13.

[0044] Optionally, the electrode fixing device also includes a cover 4, and the edge of the cover 4 is symmetrically provided with multiple groups of buckles 41 extending downward, and the inner side of the side wall 11 is symmetrically provided with multiple groups of slots 14, and the multiple groups of buckles 41 cooperate with the multiple groups of slots 14 to achieve the closing and opening of the cover 4; the edge of the cover 4 is also evenly provided with multiple pressing plates (not shown in the figure), and the positions of the multiple pressing plates correspond to the positions of the multiple wire grooves 13. When the electrode is placed in the wire groove 13 and the cover 4 is covered, the pressing plate presses the electrode from above to achieve secondary positioning, thereby further preventing the electrode from loosening and shifting.

[0045] Optionally, see Appendix Figure 3-4 The bottom end of the inner side wall of the side wall 11 is provided with a first inner boss 16 extending inwardly toward the inner side of the through hole; the locking piece 3 is provided on the upper surface of the first inner boss 16, and the first inner boss 16 is used to limit the locking piece 3 and provide axial support; one end of the locking piece 3 is axially rotatably provided on the upper surface of the first inner boss 16 through the rotating shaft 5. Preferably, the locking piece 3 is 4 pieces.

[0046] Furthermore, a second inner boss (not shown in the figure) extending inward is provided on the inner side wall of the side wall 11 toward the inner side of the through hole; the first inner boss 16 is located below the second inner boss, and the locking ring 2 is arranged on the upper surface of the second inner boss, and the second inner boss is used to limit the locking ring 2 and provide axial support; optionally, the first inner boss is intermittently arranged on the inner side wall of the side wall 11, and its width is smaller than the width of the locking ring 2.

[0047] Optionally, see Appendix Figure 1-4 A plurality of locking ring limit buckles 15 are evenly arranged on the inner wall of the side wall 11 at a position above the first inner boss 16, and the locking ring limit buckle 15 is also located above the second inner boss; the locking ring 2 has a plurality of locking ring limit grooves 21 evenly distributed along the circumferential direction, and the locking ring limit buckle 15 is matched with the locking ring limit groove 21 in size. When the locking ring 2 rotates to drive the locking plate 3 to extend to lock the electrode, the locking ring limit groove 21 is just locked and limited with the locking ring limit buckle 15, so that the locking ring 2 and the locking plate 3 cannot be displaced, thereby clamping the electrode in place.

[0048] Optionally, the rotating shaft 5 is arranged corresponding to the position of the locking ring limit buckle 15 .

[0049] Optionally, see Appendix Figure 2 The locking ring limit buckle 15 is made of hard elastic material and protrudes downward along the position of the locking ring limit groove 21. Further, the locking ring limit buckle 15 includes a spring piece and a mounting block; the material of the spring piece is metal or plastic, and is in an inverted "convex" shape. The top of the inverted "convex" shape of the spring piece is connected to the mounting block, and the mounting block is arranged at the upper end of the inner wall of the side wall 11. The protruding point of the bottom end of the inverted "convex" shape of the spring piece matches the size of the locking ring limit groove 21, and the two sides of the locking ring limit groove 21 are 5 degrees to The outer inclined setting enables rapid rotation or jamming when the locking ring 2 is rotated through the elastic deformation of the spring sheet and the inclined setting of the two side edges of the locking ring limiting groove 21; a guide groove 23 is provided on the outer edge of the upper surface of the locking ring 2, and further, the guide groove 23 is located between the two locking ring limiting grooves 21, so that the locking ring limiting buckle 15 can slide in the guide groove 23 when it pops out of the locking ring limiting groove 21, and the locking ring limiting buckle 15 is convenient for being stuck in another locking ring limiting groove 21.

[0050] Optionally, see Appendix Figure 5-7 The top surface of the locking ring 2 is evenly provided with rotation holes 22. The rod-shaped tool is inserted into the rotation holes 22 so that the locking ring 2 can rotate clockwise or counterclockwise.

[0051] Optionally, the inner wall of the side wall 11 is provided with a vertical groove 8 and an annular groove 9, and the vertical groove 8 is connected with the annular groove 9; the vertical groove 8 is provided with multiple, preferably two, and is horizontal to the axis of the axial through hole of the base 1; the outer side of the outer ring side wall of the locking ring 2 is provided with a sliding block, preferably a limiting protrusion 10, and the limiting protrusion 10 can slide in the vertical groove 8 and the annular groove 9, so as to facilitate the installation and rotation of the locking ring 2.

[0052] Optionally, each group of the card slots 14 is provided with two card slot platforms, and the two card slot platforms are respectively provided on both sides of a locking ring limit buckle 15, see the attached Figure 1Each group of the buckles 41 is provided with two tongues, and the setting positions correspond to the two card slots in each group of the card slots 14 for locking and limiting; the lower end of the tongue is provided with a card 42, and when the cover 4 is covered on the base 1, the card 42 can be inserted into the locking ring limiting grooves 21 on the two adjacent sides of the locking ring limiting grooves 21 limited by the locking ring limiting buckle 15 for secondary limiting, so as to ensure the locking effect of the electrode locking. Furthermore, the locking ring limiting groove 21 runs through the outer ring side wall of the locking ring 2, and the corresponding position of the upper surface of the first inner boss 16 is provided with a card limiting groove, and the card 42 can pass through the locking ring limiting groove 21 directly to the card limiting groove, and completely lock the locking ring 2.

[0053] Optionally, see Appendix Fig. 9 , the fixing part 12 is provided with a plurality of screw holes, and the fixing part 12 is provided with a deformation groove 17 at the position corresponding to the screw hole. During the operation, the skull screw is screwed into the skull through the screw hole. During the screwing process, the fixing part can be elastically deformed due to the gap of the deformation groove 17, so that the screw can be screwed into the skull more smoothly. Furthermore, the deformation groove 17 is located on the lower end surface of the fixing part 12, so as to reduce the risk of human tissue growing into the deformation groove 17 or fluid accumulation in the deformation groove 17. Since the narrow space in the deformation groove 17 is not conducive to blood circulation, if human tissue grows in the deformation groove 17, it may cause necrosis of the human tissue located in the deformation groove 17 and induce inflammation. At the same time, when the electrode fixing device reaches the end of its service life, removing the electrode fixing device from the patient's skull will cause pulling and damage to the human tissue.

[0054] Preferred design scheme 1 of the rotary clamping assembly:

[0055] See attached Figure 1 , 5 -7, the locking ring 2 and the locking plate 3 of the embodiment 1 described above, the bottom of the locking ring 2 is provided with a plurality of slide grooves 7 of the same number and corresponding position as the locking plate 3, the slide grooves 7 are arranged in a spiral direction along the locking ring 2, and a handle 6 is arranged at one end of the locking plate 3 close to the rotating shaft 5, the handle 6 is clamped in the slide groove 7, and the handle can slide in the slide groove 7; the locking plate 3 is an arc-shaped plate, and the arc of the locking plate 3 is arranged along the same or opposite rotation direction as the slide groove 7. It is extended in the spiral direction; a guide groove is provided on the inner side surface of the locking piece 3, and when the locking piece 3 extends toward the center, the end of the adjacent locking piece 3 away from the rotating shaft 5 can be stuck and inserted into the guide groove of the inner side surface of the previous locking piece 3; the end of the locking piece 3 away from the rotating shaft 5 is provided with a protrusion in the axial direction of the fixing device, and when multiple locking pieces 3 are extended into place, the protrusions at the ends of the multiple locking pieces 3 are stuck together and surround an electrode placement area, and the size of the placement area can lock the electrode.

[0056] Optionally, the slide groove 7 radially penetrates the locking ring 2; the width of the slide groove 7 is gradually deformed and radially penetrates the locking ring 2. Specifically, the width of the slide groove 7 on the inner wall of the locking ring 2 is greater than its width on the outer wall, thereby facilitating driving the locking plate 3 to open and close.

[0057] Optionally, an elastic member is provided on the protrusion near the electrode side, and a convex edge is provided on the elastic member near the electrode side, which can realize elastic locking of the electrode, making the electrode less prone to damage while improving the locking effect.

[0058] Preferred design scheme 2 for the rotary clamping assembly:

[0059] According to the locking ring 2 and the locking plate 3 of the embodiment 1 described above, a handle is provided at the bottom of the locking ring 2, and the locking plate 3 is an arc-shaped plate. The arc of the locking plate 3 extends along the spiral direction of the locking ring 2, and a sliding groove with the same direction as the arc of the locking plate 3 is provided on the locking plate 3, and the handle is clamped in the sliding groove, and the handle can slide in the sliding groove; a guide groove is provided on the inner side of the locking plate 3, and when the locking plate 3 is extended inwardly, the end of the adjacent locking plate 3 away from the rotating shaft 5 can be clamped and inserted into the guide groove of the inner side of the previous locking plate 3; the end of the locking plate 3 away from the rotating shaft is provided with a protrusion toward the axial direction of the fixing device, and when multiple locking plates 3 are extended into place, the ends of the multiple protrusions surround an electrode placement area, and the size of the placement area can lock the electrode.

[0060] Optionally, an elastic member is provided on the protrusion near the electrode side, and a convex edge is provided on the elastic member near the electrode side, which can realize elastic locking of the electrode, making the electrode less prone to damage while improving the locking effect.

[0061] Example 2

[0062] An electrode fixing method, using the above electrode fixing device, comprises the following steps:

[0063] S1: Determine the target location of the patient's brain to be treated through a three-dimensional stereotactic positioning device;

[0064] S2: Drill a bone hole at the appropriate skull site according to the target location;

[0065] S3: Install the electrode fixture and insert the electrode into the bone hole;

[0066] The electrode fixing device is clamped in the bone hole. After being firmly installed, the rotating clamping assembly on the base 1 of the electrode fixing device is opened; preferably, the locking plate 3 is retracted by rotating the locking ring 2 to perform the opening action. Furthermore, the rotation of the locking ring 2 is performed by clamping a rod-shaped tool into the rotating clamping hole 22 on the locking ring 2, so that the locking ring 2 rotates clockwise or counterclockwise.

[0067] The electrode is inserted into the corresponding target position through the opening of the rotating clamping assembly of the electrode fixing device for testing. If the electrode is inserted into the correct position, the rotating clamping assembly on the base 1 of the electrode fixing device is closed and the electrode is locked. Preferably, the locking ring 2 is rotated to extend the locking plate 3 for closing. Furthermore, the locking ring 2 is rotated by inserting a rod-shaped tool into the rotating clamping hole 22 on the locking ring 2, so that the locking ring 2 rotates in the opposite direction to when the rotating clamping assembly is opened.

[0068] Preferably, taking into account the particularity of deep brain stimulation surgery, under the premise of ensuring the doctor's surgical operating field, the bone hole needs to be as small as possible, and the electrode fixing device is set as small as possible. Therefore, the size of the locking ring limit groove 21 is set so that when the locking ring limit groove 21 rotates the position of the two locking ring limit grooves 21 relative to the locking ring limit buckle 15, the electrode placement area formed by the extended position of the multiple locking plates 3 can clamp the electrode.

[0069] S4: Close the lid.

[0070] Cover the cover 4 to fix the electrode for a second time and prevent the electrode from being pulled by accidental operation.

[0071] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can, within the technical scope disclosed by the present invention,

[0072] Any changes or substitutions that can be easily imagined should be included in the protection scope of the present invention.

Claims

1. An electrode fixing device, comprising a base (1) and a rotating clamping assembly, characterized in that: The rotary clamping assembly comprises a locking ring (2) and a plurality of locking plates (3); the locking ring (2) and the plurality of locking plates (3) are arranged on a base (1), the plurality of locking plates (3) are located below the locking ring (2), and the top surface of the locking ring (2) is evenly provided with rotary clamping holes (22); the plurality of locking plates (3) are extended or retracted in a space enclosed by the base (1) and the locking ring (2); The base (1) comprises a side wall (11) and a fixing portion (12) extending outward from the top end of the side wall (11); a first inner boss (16) is provided at the bottom end of the inner side wall of the side wall (11); a plurality of locking pieces (3) are provided on the upper surface of the first inner boss (16); one end of the locking piece (3) is axially rotatably provided on the upper surface of the first inner boss (16) via a rotating shaft (5); The inner side wall of the side wall (11) is also provided with a second inner boss; the first inner boss (16) is located below the second inner boss; the locking ring (2) is arranged on the upper surface of the second inner boss; The inner side wall of the side wall (11) is provided with a locking ring limit buckle (15); the locking ring limit buckle (15) is located above the second inner boss; the locking ring (2) has a plurality of locking ring limit grooves (21) distributed along the circumferential direction; The locking ring limiting buckle (15) is made of a hard elastic material and protrudes downward along the position of the locking ring limiting groove (21). The two sides of the locking ring limiting groove (21) are inclined outward at 5 degrees. When the locking ring (2) rotates to drive the locking plate (3) to extend to lock the electrode, the locking ring limiting groove (21) is just locked and locked with the locking ring limiting buckle (15), so that the locking ring (2) and the locking plate (3) cannot move, thereby clamping the electrode in place; The bottom of the locking ring (2) is provided with a plurality of slide grooves (7) of the same number and corresponding positions as the locking plate (3); the slide grooves (7) are arranged in a spiral direction along the locking ring (2); a handle (6) is arranged at one end of the locking plate (3) close to the rotating shaft (5); the handle (6) is clamped in the slide groove (7); the handle (6) can slide in the slide groove (7); the locking plate (3) is an arc-shaped plate; the arc of the locking plate (3) is the same as or opposite to that of the slide groove (7); The locking piece (3) is provided with a guide groove on the inner side surface thereof, and when the locking piece (3) is extended toward the center, the end of the adjacent locking piece (3) away from the rotating shaft (5) can be snapped into the guide groove on the inner side surface of the previous locking piece (3); the end is provided with a protrusion in the axial direction of the electrode fixing device, and when the plurality of locking pieces (3) are extended into place, the plurality of protrusions are snapped together and surround an electrode placement area, and the size of the placement area can lock the electrode.

2. The electrode fixing device according to claim 1, characterized in that: The electrode fixing device also includes a cover (4), and a buckle (41) is provided on the edge of the cover (4); the buckle (41) is used to be fixedly engaged with the base (1).

3. The electrode fixing device according to claim 2, characterized in that: The buckle (41) is provided with a tongue piece; and a card (42) is provided at the lower end of the tongue piece.

4. The electrode fixing device according to claim 3, characterized in that: The edge of the cover (4) is also provided with a plurality of pressing sheets.

5. The electrode fixing device according to claim 1, characterized in that: The lower end surface of the fixing portion (12) is provided with a deformation groove (17).

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