A split steel plate end-fixed and clamped spinal canal laminoplasty internal fixation device

Abstract

The present invention relates to a split steel plate end-fixed and embracing spinal canal shaping internal fixation device, comprising a straight-edge steel plate and a beveled steel plate distributed on the left and right sides of the spinous process, wherein the straight-edge steel plate has a decompression groove straight edge extending from one side close to the spinous process, a straight-edge guide rail in contact with the spinous process is provided on the outer side of the decompression groove straight edge, and a plurality of positioning screws are provided on the straight-edge steel plate; the beveled steel plate has a decompression groove bevel extending from one side close to the spinous process, a beveled guide rail in contact with the spinous process is provided on the outer side of the beveled steel plate, and a plurality of positioning screws are provided on the beveled steel plate. Thus, the reliability of use and coordination can be effectively improved, the difficulty of use can be reduced, and the labor intensity of medical staff can be reduced. The overall structure is simple and easy to manufacture. A corresponding accommodating cavity can be added to achieve drug delivery, further reducing the number of operating steps.

Description

Technical Field

[0001] The present invention relates to a fixing device, in particular to a split steel plate end-fixed and tightly-enclosed spinal canal shaping internal fixation device. Background Art

[0002] Lumbar disc herniation is a common and frequently occurring orthopedic disease and the most common cause of low back and leg pain. Surgical treatments include traditional open surgery and minimally invasive procedures. The instruments used in these procedures are often a single-door internal fixation system from a posterior cervical approach, where screws secure the ends of a steel plate to the spinous and articular processes (or pedicles) to maintain stability after laminoplasty. In recent years, a double-door internal fixation system (cervical microendoscopic laminoplasty, CMEL) has emerged. However, due to structural and principle limitations, these systems also secure the ends of a steel plate to the spinous and articular processes (or pedicles) with screws to maintain stability after laminoplasty.

[0003] However, securing the ends of a long steel plate to the bone with screws is only suitable for surgeries requiring larger incisions. It is extremely difficult to perform spinal endoscopic or robotic surgery, which requires very small incisions. This is because the nearly vertical bone surface and the covering of skin and muscle on the spinous process make screw installation at the spinous process very difficult. This has seriously hampered the development and widespread application of new technologies such as robotic spinal surgery, which allows for very small incisions.

[0004] Furthermore, when the incision is small, the two ends of the existing surgical instrument need to be fixed to the bone with screws, and the screws need to be fixed alternately in the left and right incisions, which is very cumbersome. If the operation is not done properly, unnecessary displacement is likely to occur.

[0005] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a split steel plate end-fixed and clamped spinal canal shaping internal fixation device to make it more valuable for industrial use. Summary of the Invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a split steel plate end-fixed and embracing spinal canal laminoplasty internal fixation device.

[0007] The present invention provides a split steel plate end-fixed and clamping spinal canal shaping internal fixation device, which includes straight-edge steel plates and beveled-edge steel plates distributed on the left and right sides of the spinous process, wherein: the straight-edge steel plate has a decompression groove straight edge extending on the side close to the spinous process, and a straight-edge guide rail in contact with the spinous process is provided on the outer side of the decompression groove straight edge, and a plurality of positioning screws are provided on the straight-edge steel plate; the beveled steel plate has a decompression groove bevel extending on the side close to the spinous process, and an beveled guide rail in contact with the spinous process is provided on the outer side of the beveled steel plate.

[0008] Furthermore, in the above-mentioned split steel plate end-fixed and clamped spinal canal shaping internal fixation device, a main limiting step is provided at the upper end of the straight side of the decompression groove, and a secondary limiting step is provided at the upper end of the oblique side of the decompression groove.

[0009] Furthermore, in the above-mentioned split steel plate end-fixed and clamped spinal canal shaping internal fixation device, a main accommodating cavity is provided in the straight side of the decompression groove, and a plurality of main release holes are distributed on the straight-side guide rail, and the main release holes are connected to the main accommodating cavity.

[0010] Furthermore, in the above-mentioned split steel plate end-fixed and clamped spinal canal shaping internal fixation device, a secondary accommodating cavity is provided in the oblique side of the decompression groove, and a plurality of secondary release holes are distributed on the oblique guide rail, and the secondary release holes are connected to the secondary accommodating cavity.

[0011] Furthermore, the above-mentioned split steel plate end fixed clamping type spinal canal shaping internal fixation device, wherein the beveled steel plate is provided with a plurality of oblique screw holes, and the positioning screws are connected to the corresponding oblique screw holes.

[0012] Furthermore, in the above-mentioned split steel plate end-fixed and clamped spinal canal laminoplasty internal fixation device, a pressure groove is provided in the oblique screw hole.

[0013] By means of the above solution, the present invention has at least the following advantages:

[0014] 1. It can effectively improve the reliability of use, reduce the difficulty of use, and reduce the labor intensity of medical staff.

[0015] 2. The overall structure is simple and easy to manufacture.

[0016] 3. A corresponding receiving cavity can be added to realize drug delivery, further reducing the operation steps.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of the use state of the split steel plate end-fixed and embracing spinal canal shaping internal fixation device.

[0019] Figure 2 It is a schematic diagram of the combination of straight-edge steel plates and bevel-edge steel plates.

[0020] Figure 3 It is a schematic diagram of the side connection of the beveled edge steel plate.

[0021] Figure 4 It is a schematic diagram of the front distribution structure of the main containing cavity in the straight-edge steel plate.

[0022] Figure 5 It is a schematic diagram of the front distribution structure of the main containing cavity in the straight-edge steel plate.

[0023] The meanings of the reference numerals in the figures are as follows.

[0024] 1 Straight edge steel plate 2 Bevel edge steel plate

[0025] 3. Decompression groove straight edge 4. Straight edge guide rail

[0026] 5 Decompression groove bevel 6 Inclined guide rail

[0027] 7 Main limit step 8 Auxiliary limit step

[0028] 9 Main accommodating chamber 10 Main release hole

[0029] 11 Oblique screw hole 12 First screw

[0030] 13 Second screw 14 Third screw

[0031] 15 Fourth screw 16 Spinous process

[0032] 17 Straight pressure relief groove 18 Oblique pressure relief groove

[0033] 19 vertebrae DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0035] like Figures 1 to 5A split steel plate end-fixed and clamped spinal canal shaping internal fixation device is disclosed, comprising a straight-edge steel plate 1 and a beveled steel plate 2 distributed on the left and right sides of the spinous process 16. The device is unique in that: a decompression groove straight edge 3 is extended on the side of the straight-edge steel plate 1 close to the spinous process 16, and a straight-edge guide rail 4 in contact with the spinous process 16 is provided on the outside of the decompression groove straight edge 3, which can play a guiding role and allow the spinous process 16 to move backward along its straight-edge guide rail 4. At the same time, a number of positioning screws are provided on the straight-edge steel plate 1 to facilitate the effective fixation of the straight-edge steel plate 1 and the spinous process 16. The beveled steel plate 2 used in the present invention has a decompression groove bevel 5 extended on the side close to the spinous process 16. In addition, an oblique guide rail 6 in contact with the spinous process 16 is provided on the outside of the decompression groove bevel 5, and a number of positioning screws are provided on the beveled steel plate 2. During implementation, the positioning screws located on the upper portion of the straight-edge steel plate 1 are designated as first screws 12 and second screws 13, while the positioning screws located on the beveled-edge steel plate 2 are designated as third screws 14 and fourth screws 15. A straight pressure relief groove 17 and an oblique pressure relief groove 18 are provided on either side of the lower end of the spinous process 16. Furthermore, to ensure better contact and integration with the formed internal fixation device, a straight-edge guide rail 4 is provided on the spinous process 16 located on the straight pressure relief groove 17, contacting the straight edge 3 of the pressure relief groove. An oblique guide rail 6 is provided on the spinous process 16 located on the oblique pressure relief groove 18, contacting the oblique edge 5 of the pressure relief groove.

[0036] In accordance with a preferred embodiment of the present invention, a primary limiting step 7 is provided at the upper end of the straight edge 3 of the decompression groove, and a secondary limiting step 8 is provided at the upper end of the oblique edge 5 of the decompression groove. In this way, the primary limiting step 7 and the secondary limiting step 8 can be used to control the posterior displacement of the spinous process 16 and achieve effective limiting.

[0037] Furthermore, the present invention provides a main accommodating chamber 9 in the straight side 3 of the pressure reducing groove, and a plurality of main release holes 10 are distributed on the straight side guide rail 4, and the main release holes 10 are interconnected with the main accommodating chamber 9. In this way, the corresponding medicine can be placed in the main accommodating chamber 9 according to the needs of actual implementation to meet the needs of analgesia, anti-inflammation, etc. In addition, according to the needs of actual implementation, the straight side 3 of the pressure reducing groove itself can also be a hollow cavity structure, and the main release holes 10 are provided on the front and both sides. In this way, the storage capacity of the medicine can be increased and a more uniform dispersed release can be achieved. During implementation, a secondary accommodating chamber can also be provided in the oblique side 5 of the pressure reducing groove, and a plurality of secondary release holes are distributed on the oblique guide rail 6, and the secondary release holes are interconnected with the secondary accommodating chamber. In this way, synchronous drug release can be achieved, reducing discomfort at the installation site. Similarly, for some special needs, the oblique side 5 of the pressure reducing groove itself can also be a hollow cavity structure, and the secondary release holes are provided on the front and both sides.

[0038] In view of actual implementation, in order to better realize the combination and positioning of the beveled steel plate 2, a plurality of oblique screw holes 11 are provided on the beveled steel plate 2, and the positioning screws are connected to the corresponding oblique screw holes 11. That is to say, the third screw 14 and the fourth screw 15 are combined with the spinous process 16 through the corresponding oblique screw holes 11. At the same time, a pressure groove (not shown in the figure) can be provided in the oblique screw hole 11. In this way, by tightening the fourth screw 15, the oblique screw hole 11 can play an extrusion role, causing the spinous process 16 to move backward along the straight-edge guide rail 4 of the straight-edge steel plate 1, and the auxiliary limit step 8 can effectively control the distance that the spinous process 16 moves backward.

[0039] The working principle of the present invention is as follows:

[0040] During use, first, the straight decompression groove 17 and the oblique decompression groove 18 are opened on the spinous process 16, and the straight-edge guide rail 4 and the oblique guide rail 6 are processed. The straight-edge guide rail 4 of the straight-edge steel plate 1 plays a guiding role, allowing the spinous process 16 to move backward along its straight-edge guide rail 4. In addition, the main limiting step 7 can control the backward movement distance of the spinous process 16. The oblique-edge steel plate 2 is guided by the oblique-edge guide rail. During the tightening of the fourth screw 15, the oblique screw hole 11 can play an extrusion role, allowing the spinous process 16 to move backward along the straight-edge guide rail 4 of the straight-edge steel plate 1. During this period, the secondary limiting step 8 can also control the required backward movement distance of the spinous process 16.

[0041] For ease of operation, the straight-edged plate 1 can be first secured within the straight decompression groove 17 of the vertebral lamina, followed by the beveled-edged plate 2 within the oblique decompression groove 18. Thus, the straight-edged and beveled-edged plates 1 and 2 work together to displace the spinous process 16 posteriorly and securely hold it in place. This avoids the need for alternating left and right tightening of the individual set screws. This allows for automatic expansion and shaping of the vertebral body 19 without damaging it.

[0042] It should be noted that the present invention is intended to protect a surgical instrument, and the description of its functional use in the surgical process is only to better demonstrate its structure, and does not emphasize the surgical (disease) treatment method.

[0043] It can be seen from the above textual description and the accompanying drawings that the present invention has the following advantages:

[0044] 1. It can effectively improve the reliability of use, reduce the difficulty of use, and reduce the labor intensity of medical staff.

[0045] 2. The overall structure is simple and easy to manufacture.

[0046] 3. A corresponding receiving cavity can be added to realize drug delivery, further reducing the operation steps.

[0047] In addition, the indicated orientations or positional relationships described in the present invention are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation or operate with a specific orientation structure. Therefore, it cannot be understood as a limitation on the present invention.

[0048] The terms "primary" and "secondary" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features designated as "primary" or "secondary" may explicitly or implicitly include one or more of such features. In the description of this invention, "several" means two or more, unless otherwise specifically defined.

[0049] Similarly, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0050] In the present invention, unless otherwise expressly specified or limited, terms such as "connected" and "disposed" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium; they can be internal communication between two components or an interactive relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. And it can be directly on another component or indirectly on the other component. When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0051] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A split plate end-fixed, embracing spinal canal laminoplasty internal fixation device, comprising a straight-edge plate and a beveled-edge plate distributed on the left and right sides of the spinous process, characterized in that: A decompression groove straight edge is extended on one side of the straight-edge steel plate close to the spinous process, a straight-edge guide rail in contact with the spinous process is provided on the outer side of the decompression groove straight edge, and a number of positioning screws are provided on the straight-edge steel plate; a decompression groove bevel is extended on one side of the bevel steel plate close to the spinous process, an bevel guide rail in contact with the spinous process is provided on the outer side of the bevel steel plate, and a number of positioning screws are provided on the bevel steel plate; a main limiting step is provided on the upper end of the decompression groove straight edge, and a secondary limiting step is provided on the upper end of the decompression groove bevel; a number of oblique screw holes are provided on the bevel steel plate, the positioning screws are connected to the corresponding oblique screw holes, and a pressure groove is provided in the oblique screw hole.

2. The split steel plate end-fixed embracing spinal canal laminoplasty internal fixation device according to claim 1, characterized in that: A main accommodating cavity is provided in the straight side of the decompression groove, and a plurality of main releasing holes are distributed on the straight-side guide rail. The main releasing holes are communicated with the main accommodating cavity.

3. The split steel plate end-fixed embracing spinal canal laminoplasty internal fixation device according to claim 1, characterized in that: A secondary accommodating cavity is provided in the oblique side of the decompression groove, and a plurality of secondary releasing holes are distributed on the oblique guide rail. The secondary releasing holes are communicated with the secondary accommodating cavity.

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