Anti-collapse reduction fixing plate for skull and vertebral plate
By designing a reduction fixing plate that can be fixed on both sides of the skull and lamina, using L-shaped substrate hooks and fastener mounting holes, the risks of depression and epidural bleeding after skull and lamina surgery are solved, and the effect of stable fixation and convenient use is achieved.
Patent Information
- Application Number
- CN202420598052.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The prior art has the risk of skull flap and laminar depression during postoperative fixation and reduction of skull and laminar plates, and the commonly used planar titanium plate fixation method requires peeling of the dura mater to increase the risk of epidural hemorrhage.
A skull and lamina anti-collapse reduction fixing plate is designed, which can be fixed on both sides of the skull and lamina. It adopts a combined structure of the substrate body and the fastener installation hole. The bone is hooked by the L-shaped substrate hook, and the fastener is inserted into the mounting hole to fix it, avoiding separation of the dura mater.
It achieves immediate stability of the skull and lamina, prevents sinking from compressing the brain and spinal cord tissue, avoids the risk of epidural hemorrhage, and can be easily disassembled, adjusted and reused when needed.
Smart Images
Figure CN222604657U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of neurosurgery medical equipment, in particular to a skull and vertebral plate anti-collapse resetting and fixing plate. Background Art
[0002] When a craniotomy is required for intracranial tumors, cerebral hemorrhage, trauma, etc., part of the skull needs to be removed during the operation. After the tumor or hematoma is removed, the removed skull needs to be put back and firmly fixed in its original position. The same is true for surgeries such as intraspinal tumors. The vertebral lamina removed during the operation needs to be fixed back to its original position after the tumor is removed.
[0003] A simple method is to drill holes in the skull and vertebral lamina and fix them back to their original position with silk threads. However, the skull flap and vertebral lamina are not strong enough with this fixation method, and the skull flap and vertebral lamina may sink and compress the brain and spinal cord tissue. At present, the commonly used method for resetting and fixing skull flaps and vertebral lamina in clinical practice is a flat titanium plate with holes. After the skull flap and vertebral lamina are relocated, they are fixed with titanium plates and screws. Since the flat titanium plate is only fixed on one side of the skull and vertebral lamina, there is still a risk of skull flap and vertebral lamina sinking. The skull lock can fix the skull flap well, but when the craniotomy is needed again, the skull lock cannot be removed and reused. In addition, during the placement of the skull lock, part of the normal dura mater needs to be peeled off, which increases the risk of epidural bleeding.
[0004] Therefore, there is a need for a reduction plate that is more suitable for fixation and anti-collapse after skull and spinal canal surgery. Utility Model Content
[0005] In order to improve the above technical problems, the utility model proposes a skull and vertebral lamina anti-collapse reduction and fixation plate, which can be fixed on both sides of the skull and vertebral lamina. It can not only make the skull and vertebral lamina obtain immediate stability, but also prevent the risk of skull flap and vertebral lamina collapse, without the need to separate the normal dura mater.
[0006] In order to achieve the above purpose, the utility model proposes the following technical solutions:
[0007] A skull and vertebral plate anti-collapse reduction and fixation plate comprises a base plate body which fits with a selected part of a skull or vertebral plate and a longitudinal extension portion along the base plate body, at least one first mounting hole for installing a positioning fastener is formed in the first end extension portion of the base plate body, and at least one second mounting hole for installing a positioning fastener is formed in the second end extension portion of the base plate body; an L-shaped base plate hook for hooking a bone to prevent displacement is provided on one side surface of the base plate body; the reduction plate is fixed to the skull or vertebral plate by inserting the fastener into the mounting hole.
[0008] In a replaceable embodiment of the present invention, both the first mounting hole and the second mounting hole are one.
[0009] In an alternative embodiment of the present invention, two first mounting holes arranged in parallel in transverse direction are formed in the first end extension portion of the substrate body, and two second mounting holes arranged in parallel in longitudinal direction are formed in the second end extension portion of the substrate body.
[0010] In an alternative embodiment of the present invention, the distance between the edges of the two first mounting holes is 2-10 mm; the distance between the edges of the two second mounting holes is 3-12 mm.
[0011] In a replaceable embodiment of the utility model, the L-shaped substrate hook includes a long plate connected to the substrate body and a hook plate formed at the end of the long plate and extending longitudinally parallel to a second mounting hole, the angle between the long plate and the substrate body is 85 to 105°, and the angle between the long plate and the hook plate is 80 to 100°.
[0012] In a replaceable embodiment of the present invention, the angle between the long plate and the base plate body is 90°, and the angle between the long plate and the hook plate is 90°.
[0013] In an alternative embodiment of the present invention, the plane where the first mounting hole is located is 120-180° away from the plane where the second mounting hole is located.
[0014] In an alternative embodiment of the present invention, the first mounting hole and the second mounting hole are conical holes or spherical holes.
[0015] In an alternative embodiment of the present invention, the substrate body has a thickness of 0.7 to 0.9 mm, a length of 14 to 16 mm, and a width of 7 to 9 mm; and a Young's modulus of the substrate body is 42 to 44.5 GPa.
[0016] In a replaceable embodiment of the present invention, the inner diameters of the first mounting hole and the second mounting hole are both 2.5-3.5 mm, the height of the long plate is 3-7 mm, the length of the hook plate is 2.5-3.5 mm, and the edge of the hook plate is an arc structure.
[0017] Beneficial effects of the utility model
[0018] 1) The skull and vertebral lamina anti-collapse reduction and fixation plate of the present application is used in skull reduction and vertebral lamina reduction surgery, which can not only make the skull and vertebral lamina obtain immediate stability, but also prevent the skull flap and vertebral lamina from sinking and compressing the brain and spinal cord tissue. There is no need to separate the normal dura mater (spinal) membrane, thus avoiding the separation of the periosteum; and when surgery is needed again or the fixation position needs to be adjusted, it can be easily disassembled, adjusted, and used again.
[0019] 2) The base body of the reduction and fixation plate of the present application fits with the selected part of the skull or lamina, and a plurality of fastener mounting holes are provided on the base body, through which the fasteners can fix the base body to the human skeleton. When in use, the L-shaped base hook is hooked onto the skull or lamina cut during surgery, the base body fits with the selected bone surface of the patient, and then the fasteners are inserted into the mounting holes and tightened to fix on the bones, thus completing the fixation and reduction of the skull and lamina. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The structure of the anti-collapse resetting fixing plate of the utility model is shown in FIG. Figure 1 ;
[0021] Figure 2 The structure of the anti-collapse resetting fixing plate of the utility model is shown in FIG. Figure 2 ;
[0022] Figure 3 The actual use structure of the anti-collapse resetting fixing plate of the utility model is shown in FIG. Figure 1 ;
[0023] Figure 4 The actual use structure of the anti-collapse resetting fixing plate of the utility model is shown in FIG. Figure 2 . DETAILED DESCRIPTION
[0024] The following will further describe the technical solution of the utility model in combination with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the utility model, and should not be interpreted as limiting the scope of protection of the utility model. All technologies implemented based on the above content of the utility model are included in the scope of protection of the utility model.
[0025] like Figure 1-2 As shown, the utility model provides a skull and vertebral plate anti-collapse reduction and fixation plate, comprising a base body 1 that fits with a selected part of a skull or vertebral plate and a longitudinal extension portion along the base body 1, at least one first mounting hole 2 for installing a positioning fastener is formed on the first end extension portion of the base body 1, and at least one second mounting hole 3 for installing a positioning fastener is formed on the second end extension portion of the base body 1; an L-shaped base hook is provided on one side surface of the base body 1 for hooking the skull or vertebral plate to prevent displacement, and the reduction and fixation plate is fixed to the skull or vertebral plate by inserting the fastener into the mounting hole.
[0026] The resetting and fixing plate in the present application is generally made of titanium alloy, nickel-titanium alloy, PEEK and other materials, and can be assembled or integrally formed. Preferably, the thickness of the substrate body 1 is 0.7-0.9 mm, the length is 14-16 mm, and the width is 7-9 mm. The Young's modulus is 42-44.5 Gpa.
[0027] exist Figure 1 In one embodiment shown, the first mounting hole 2 and the second mounting hole 3 may be the same.
[0028] exist Figure 2 In one embodiment shown, two first mounting holes arranged in parallel in a transverse direction are formed on the first end extension of the substrate body 1, and two second mounting holes arranged in parallel in a longitudinal direction are formed on the second end extension of the substrate body 1. By arranging two mounting holes in parallel in a transverse direction or in a longitudinal direction at both ends, a firm fixation can be achieved without squeezing other human tissues due to too many mounting holes.
[0029] Preferably, the distance between the edges of the two first mounting holes 2 is 2-10 mm; the distance between the edges of the two second mounting holes 3 is 3-12 mm.
[0030] The L-shaped substrate hook can be arranged at different side positions of the substrate body as required. For example, the L-shaped substrate hook is arranged at the middle position of the substrate body 1.
[0031] Preferably, the L-shaped base hook comprises a long plate 4 connected to the base body 1 and a hook plate 5 formed at the end of the long plate 4 and extending toward the second mounting holes 3 arranged in parallel in the longitudinal direction.
[0032] The base plate body is preferably a micro plate, which covers the bone suture after the skull or cone plate is removed and is perpendicular to the bone suture. In order to prevent the skull and cone plate from collapsing, a curved L-shaped hook plate is connected to the middle position of the base plate body, which is stuck between the skull or cone plate bone sutures. During the operation, the height of the long plate can be adjusted according to the thickness of the skull and cone plate, in order to hold the free skull or cone plate. Finally, the base plate body is fixed to the surface of the skull or cone plate by micro screws through the screw holes at both ends of the micro plate.
[0033] Preferably, the angle between the long plate 4 and the base body 1 is 85-105°, and the angle between the long plate 4 and the hook plate 5 is 80-100°. For example, the angle between the long plate 4 and the base body 1 can be 90°, and the angle between the long plate 4 and the hook plate 5 can be 90°.
[0034] Specifically, the height of the long plate 4 is 3-7 mm, the length of the hook plate 5 is 2.5-3.5 mm, and the edge of the hook plate 5 is an arc-shaped structure. Considering the thickness range of bones, the height of the long plate is controlled within this range, which is more conducive to resetting and fixing the adjacent skull or cone plate that has been cut; the edge of the hook plate is designed to be an arc-shaped structure, mainly to prevent scratching of nerves or other human tissues.
[0035] Among them, the substrate body 1 can be a planar structure, that is, the plane where the first mounting hole 2 is located and the plane where the second mounting hole 3 is located are the same plane; it can also be bent according to the fixed and reset skull or cone plate, so that the angle between the two planes is any angle between 120 and 180°, so that it can better fit the bone surface.
[0036] Specifically, the first mounting hole 2 and the second mounting hole 3 may be conical holes or spherical holes. When the first mounting hole and the second mounting hole are spherical holes, the inner diameters of the holes are both 2.5 to 3.5 mm.
[0037] The present application also provides a practical method for using the skull and vertebral plate anti-collapse reduction and fixation plate, which is roughly as follows:
[0038] S1, determine the long plate height of the L-shaped base hook according to the thickness of the bone flap or cone plate and select a suitable reduction and fixation plate;
[0039] S2, clamp the base plate of the reduction and fixation plate on the bone edge, cover the bone suture after the skull or cone plate is removed, and be perpendicular to the bone suture;
[0040] S3, put the bone flap back on the skull or spinal canal, hook the L-shaped base hook on the skull or vertebral plate cut during the operation, and fit the base body to the patient's selected bone surface, so that the L-shaped base hook holds the free skull or vertebral plate, and then use fasteners to insert the first mounting hole and the second mounting hole, tighten and fix it on the bone, and complete the fixation and reduction of the skull and vertebral plate.
[0041] The above describes the implementation of the utility model in an exemplary manner. However, the protection scope of the utility model is not limited to the above exemplary implementation. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A skull and vertebral plate anti-collapse reduction and fixation plate, characterized in that: The invention comprises a base body (1) which fits with a selected part of a skull or a vertebral plate, and a longitudinal extension portion along the base body (1); at least one first mounting hole (2) for mounting a positioning fastener is formed on the first end extension portion of the base body (1); at least one second mounting hole (3) for mounting a positioning fastener is formed on the second end extension portion of the base body (1); an L-shaped base hook is provided on one side surface of the base body (1) for hooking the skull or vertebral plate to prevent displacement; and the reduction and fixation plate is fixed on the skull or vertebral plate by inserting the fastener into the mounting hole.
2. The skull and vertebral plate for preventing collapse and repositioning according to claim 1, characterized in that: The first mounting hole (2) and the second mounting hole (3) are both one.
3. The skull and vertebral plate for preventing collapse and repositioning according to claim 1, characterized in that: Two first mounting holes (2) arranged in parallel in transverse direction are formed on the first end extension portion of the base plate body (1), and two second mounting holes (3) arranged in parallel in longitudinal direction are formed on the second end extension portion of the base plate body (1).
4. The skull and vertebral plate anti-collapse reduction and fixation plate according to claim 3, characterized in that: The distance between the edges of the two first mounting holes (2) is 2 to 10 mm; the distance between the edges of the two second mounting holes (3) is 3 to 12 mm.
5. The skull and vertebral plate for preventing collapse and repositioning according to claim 1, characterized in that: The L-shaped base hook comprises a long plate (4) connected to a base body (1) and a hook plate (5) formed at the end of the long plate (4) and extending from a second mounting hole (3) arranged in parallel in the longitudinal direction, wherein the angle between the long plate (4) and the base body (1) is 85 to 105 degrees, and the angle between the long plate (4) and the hook plate (5) is 80 to 100 degrees.
6. The skull and vertebral plate anti-collapse reduction and fixation plate according to claim 5, characterized in that: The included angle between the long plate (4) and the base plate body (1) is 90°, and the included angle between the long plate (4) and the hook plate (5) is 90°.
7. The skull and vertebral plate for preventing collapse and repositioning according to claim 1, characterized in that: The plane where the first mounting hole (2) is located is 120 to 180 degrees from the plane where the second mounting hole (3) is located.
8. The skull and vertebral plate for preventing collapse and repositioning according to claim 1, characterized in that: The first mounting hole (2) and the second mounting hole (3) are conical holes or spherical holes.
9. The skull and vertebral plate anti-collapse reduction and fixation plate according to any one of claims 1 to 7, characterized in that: The substrate body (1) has a thickness of 0.7 to 0.9 mm, a length of 14 to 16 mm, and a width of 7 to 9 mm; the Young's modulus of the substrate body (1) is 42 to 44.5 GPa.
10. The skull and vertebral plate anti-collapse reduction and fixation plate according to any one of claims 1 to 7, characterized in that: The inner diameters of the first mounting hole and the second mounting hole are both 2.5 to 3.5 mm, the height of the long plate (4) is 3 to 7 mm, the length of the hook plate (5) is 2.5 to 3.5 mm, and the edge of the hook plate (5) is an arc-shaped structure.