A spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement

Abstract

The present invention relates to a spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement, comprising a guide fixing block distributed on the right side of the spinous process, and also comprising a posterior displacement fixing block distributed on the left side of the spinous process, wherein the guide fixing block comprises a main bearing frame, the main bearing frame is provided with a through hole, a main screw is provided in the through hole, a main cross bar is provided in the main bearing frame, the main screw passes through the main cross bar, and the main cross bar extends toward the spinous process, and the posterior displacement fixing block comprises a secondary bearing frame, the secondary bearing frame is provided with a through hole, a secondary screw is provided in the through hole, a secondary cross bar is provided in the secondary bearing frame, the secondary screw passes through the secondary cross bar, and the secondary cross bar extends toward the spinous process. Thus, the mutual cooperation of the guide fixing block and the posterior displacement fixing block can facilitate the positioning of the partial spinous process posterior displacement. During use, stable guiding and locking can be achieved, which is convenient for use and adjustment. The delivery of drug particles can be achieved, meeting conventional analgesic and anti-inflammatory needs.

Description

Technical Field

[0001] The present invention relates to an internal fixation device, in particular to an internal fixation device for spinal canal laminoplasty with partial spinous process posterior displacement. Background Art

[0002] Regarding the instruments used in existing laminoplasty, multiple screws are often used to fix one or both ends of a steel plate to the spinous process and articular process (or pedicle) bones to maintain the stability of the laminoplasty.

[0003] However, when performing manual operations under endoscopy or using a surgical robot, internal fixation with multiple screws can be very cumbersome, resulting in reduced surgical efficiency, which is more obvious in the narrow space of minimally invasive surgery.

[0004] For patients with fewer segments, using traditional plates results in the spinous process being displaced posteriorly, exposing a much wider area than the intervertebral disc, significantly increasing the extent of surgical trauma and hindering its minimization. Furthermore, this posterior displacement of the spinous process often causes some thinner patients to experience a bony protrusion when touching their lower back, causing discomfort. Consequently, conventional plates, as surgical instruments, have numerous drawbacks.

[0005] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a spinal canal shaping internal fixation device with partial spinous process posterior displacement, so as 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 spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement.

[0007] The present invention provides a spinal canal shaping internal fixation device with partial spinous process posterior displacement, which includes: a guide fixing block distributed on the right side of the spinous process, and a posterior displacement fixing block distributed on the left side of the spinous process, the guide fixing block includes a main bearing frame, the main bearing frame is provided with a through hole, a main screw is provided in the through hole, a main cross bar is provided in the main bearing frame, the main screw passes through the main cross bar, and the main cross bar extends toward the spinous process, the posterior displacement fixing block includes a secondary bearing frame, the secondary bearing frame is provided with a through hole, a secondary screw is provided in the through hole, a secondary cross bar is provided in the secondary bearing frame, the secondary screw passes through the secondary cross bar, and the secondary cross bar extends toward the spinous process.

[0008] Furthermore, the above-mentioned partial spinous process posterior displacement spinal canal shaping internal fixation device, wherein the upper and lower ends of the main bearing frame are respectively provided with a main upper hole and a main lower hole, the main cross bar is provided with a light hole, the main screws are respectively passed through the main upper hole, the light hole and the main lower hole, and the middle section of the main screw is a smooth section.

[0009] Furthermore, in the above-mentioned internal fixation device for spinal canal laminoplasty with partial spinous process posterior displacement, a main boss is provided at the lower end of the main bearing frame, and one end of the main screw is connected to the main boss.

[0010] Furthermore, in the above-mentioned device for spinal canal laminoplasty with partial spinous process posterior displacement, the upper and lower ends of the secondary support frame are respectively provided with a secondary upper hole and a secondary lower hole, the secondary cross bar is provided with a threaded hole, the secondary screws are respectively passed through the secondary upper hole, the threaded hole and the secondary lower hole, and the middle section of the secondary screw is a threaded section.

[0011] Furthermore, in the above-mentioned internal fixation device for spinal canal laminoplasty with partial spinous process posterior displacement, a secondary boss is provided at the lower end of the secondary bearing frame, and one end of the secondary screw is connected to the secondary boss.

[0012] Furthermore, in the above-mentioned partial spinous process posterior displacement spinal canal shaping internal fixation device, the bottom of the main supporting frame is a flat structure, or the bottom of the main supporting frame is an inclined structure; the bottom of the auxiliary supporting frame is a flat structure, or the bottom of the auxiliary supporting frame is an inclined structure.

[0013] Furthermore, in the above-mentioned device for spinal canal shaping with partial spinous process posterior displacement, a hollow main cavity is distributed in the main supporting frame, and drug particles are arranged in the main cavity; a hollow secondary cavity is distributed in the secondary supporting frame, and drug particles are arranged in the secondary cavity.

[0014] By means of the above solution, the present invention has at least the following advantages:

[0015] 1. The mutual cooperation of the guide fixation block and the posterior displacement fixation block can facilitate the positioning of the posterior displacement of part of the spinous process.

[0016] 2. During use, stable guidance and locking can be achieved, making it easy to use and adjust.

[0017] 3. It can deliver drug particles to meet conventional analgesic and anti-inflammatory needs.

[0018] 4. The overall structure is simple, easy to manufacture and use.

[0019] 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

[0020] Figure 1 This is a schematic diagram of the use of the spinous process posterior displacement spinal canal laminoplasty internal fixation device in this section.

[0021] Figure 2 It is a schematic diagram of the side structure of the guide fixed block.

[0022] Figure 3 It is a side structural diagram of the rearward-moving fixed block.

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

[0024] 1 Spinous process 2 Guide block

[0025] 3 Backward fixed block 4 Main screw

[0026] 5 Main crossbar 6 Secondary screws

[0027] 7 Secondary crossbar 8 Main upper hole

[0028] 9 Main lower hole 10 Light hole

[0029] 11 Main boss 12 Secondary upper hole

[0030] 13 Auxiliary lower hole 14 Threaded hole

[0031] 15 auxiliary boss 16 main cavity

[0032] 17 Auxiliary chamber 18 Main pressure relief groove

[0033] 19 auxiliary decompression groove 20 bone groove

[0034] 21 contact hole 22 posteriorly movable spinous process DETAILED DESCRIPTION

[0035] 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.

[0036] like Figures 1 to 3A spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement is unique in that it includes a guide fixation block 2 located on the right side of the spinous process 1 and a posterior displacement fixation block 3 located on the left side of the spinous process 1. Specifically, the guide fixation block 2 includes a main support frame having a through hole in the main support frame, in which a main screw 4 is disposed. Furthermore, a main crossbar 5 is disposed within the main support frame, through which the main screw 4 passes, extending toward the spinous process 1. Thus, the main screw 4 guides the displacement of the main crossbar 5, which can be screwed into the spinous process 1 to secure the guide fixation block 2. During implementation, the posterior displacement fixation block 3 employed in the present invention includes a secondary support frame having a through hole in the secondary support frame, in which a secondary screw 6 is disposed. To ensure the fixed position of the spinous process 1, a secondary crossbar 7 is disposed within the secondary support frame, through which the secondary screw 6 passes, extending toward the spinous process 1. Thus, guidance adjustment can be achieved by adjusting the secondary screw 6.

[0037] In combination with a preferred embodiment of the present invention, the upper and lower ends of the main bearing frame are respectively provided with a main upper hole 8 and a main lower hole 9, a light hole 10 is provided on the main cross bar 5, and the main screw 4 is respectively passed through the main upper hole 8, the light hole 10, and the main lower hole 9. The section of the main screw 4 located in the middle is a smooth section. In this way, the existence of the smooth section can cooperate with the light hole 10 of the main cross bar 5, so that the main cross bar 5 has a free movement stroke. In this way, the guide adjustment of the rearward moving fixing block 3 is coordinated. At the same time, a main boss 11 is provided at the lower end of the main bearing frame, and one end of the main screw 4 is connected to the main boss 11. During implementation, the main boss 11 is located in the corresponding bone groove 20 repaired on the surface of the vertebra. The front section of the main screw 4 is threaded and can be screwed into the bone.

[0038] Looking further, the upper and lower ends of the secondary bearing frame are respectively provided with a secondary upper hole 12 and a secondary lower hole 13. A threaded hole 14 is provided on the secondary cross bar 7, and the secondary screw 6 passes through the secondary upper hole 12, the threaded hole 14, and the secondary lower hole 13 respectively. At the same time, the middle section of the secondary screw 6 is a threaded section. Thus, the forward or backward movement of the secondary cross bar 7 can be effectively controlled by the secondary screw 6, and precise positioning can be achieved to ensure a stable combination with the spinous process 1. In addition, a secondary boss 15 is provided at the lower end of the secondary bearing frame, and one end of the secondary screw 6 is connected to the secondary boss 15. The front section of the secondary screw 6 is threaded and can be screwed into the bone. During use, the secondary boss 15 is located in the corresponding bone groove 20 repaired on the surface of the vertebra.

[0039] In practical implementation, the bottom of the main support frame can be a flat surface or an inclined surface. Correspondingly, the bottom of the auxiliary support frame can be a flat surface or an inclined surface. This allows for a snug fit based on the contour of the bone groove 20 on the vertebral surface.

[0040] Furthermore, the present invention comprises a hollow main cavity 16 within the main support frame, containing drug particles. Similarly, a hollow secondary cavity 17 is disposed within the secondary support frame, also containing drug particles. This allows for drug release during use, providing analgesia, anti-inflammation, and the ability to induce natural resorption of herniated discs.

[0041] The working principle of the present invention is as follows:

[0042] A main decompression groove 18 is opened on the vertebrae located on both sides of the spinous process 1. Its length does not need to be the same as the overall backward displacement time of the spinous process 1, but can be slightly longer than the range of the lesion, that is, the protruding intervertebral disc. A bone groove 20 with a certain width in the horizontal direction (i.e., consistent with the long axis of the spinal canal) is opened in the spinous process 1, and its length is basically consistent with the main decompression groove 18. Afterwards, a contact hole 21 is drilled on the spinous process 1, and a main shallow groove is opened on the bone. The part of the main cross bar 5 extending out of the guide fixing block 2 is inserted into the contact hole 21. At the same time, the main boss 11 below the frame structure of the guide fixing block 2 is placed in the main shallow groove opened on the bone, and the main screw 4 is screwed into the bone through the main upper hole 8, the light hole 10 and the main lower hole 9, so that the guide fixing block 2 is locked and fixed to one side of the spinous process 1.

[0043] Subsequently, the bone between the bone groove 20 and the main decompression groove 18 is cut away from the protruding intervertebral disc to form a spinous process portion 22 that can be moved backward (this portion is the portion that participates in the compression of nerves by spinal canal stenosis).

[0044] Next, a secondary decompression groove 19 is opened, and a secondary shallow groove is also opened on the bone. The portion of the secondary crossbar 7 that extends out of the posterior displacement fixing block 3 is inserted into the contact hole 21. At the same time, the secondary boss 15 below the frame structure of the posterior displacement fixing block 3 is seated in the secondary shallow groove opened on the bone. Afterwards, the secondary screw 6 is screwed into the bone through the secondary upper hole 12, the threaded hole 14, and the secondary lower hole 13, thereby locking and fixing the posterior displacement fixing block 3 to the other side of the spinous process 1. During the implementation, the rotation of the front thread of the secondary screw 6 can cause the secondary crossbar 7 to drive the posteriorly movable spinous process portion 22 and the main crossbar 5 to move posteriorly. In this way, the posterior displacement of part of the spinous process 1 is achieved for laminoplasty.

[0045] It should be noted that the present invention is intended to protect a surgical instrument, and the description of its function is only to better demonstrate its structure, and does not emphasize the surgical treatment method.

[0046] It can be seen from the above textual description and the accompanying drawings that the present invention has the following advantages:

[0047] 1. The mutual cooperation of the guide fixation block and the posterior displacement fixation block can facilitate the positioning of the posterior displacement of part of the spinous process.

[0048] 2. During use, stable guidance and locking can be achieved, making it easy to use and adjust.

[0049] 3. It can deliver drug particles to meet conventional analgesic and anti-inflammatory needs.

[0050] 4. The overall structure is simple, easy to manufacture and use.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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 spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement, characterized by: It includes a guide fixing block distributed on the right side of the spinous process, and also includes a posterior moving fixing block distributed on the left side of the spinous process, the guide fixing block includes a main bearing frame, the main bearing frame is provided with a through hole, a main screw is provided in the through hole, a main cross bar is provided in the main bearing frame, the main screw passes through the main cross bar, and the main cross bar extends toward the spinous process, the posterior moving fixing block includes a secondary bearing frame, the secondary bearing frame is provided with a through hole, a secondary screw is provided in the through hole, a secondary cross bar is provided in the secondary bearing frame, the secondary screw passes through the secondary cross bar, and the secondary cross bar extends toward the spinous process; The upper and lower ends of the main bearing frame are respectively provided with a main upper hole and a main lower hole, and the main cross bar is provided with a light hole. The main screws are respectively passed through the main upper hole, the light hole and the main lower hole. The middle section of the main screw is a smooth section. The upper and lower ends of the secondary supporting frame are respectively provided with a secondary upper hole and a secondary lower hole, and the secondary cross bar is provided with a threaded hole. The secondary screws are respectively passed through the secondary upper hole, the threaded hole and the secondary lower hole, and the middle section of the secondary screw is a threaded section.

2. The spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement according to claim 1, characterized in that: A main boss is provided at the lower end of the main bearing frame, and one end of the main screw is connected to the main boss.

3. The spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement according to claim 1, characterized in that: A secondary boss is provided at the lower end of the secondary bearing frame, and one end of the secondary screw is connected to the secondary boss.

4. The spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement according to claim 1, characterized in that: The bottom of the main carrying frame is a plane structure, or the bottom of the main carrying frame is an inclined structure; the bottom of the auxiliary carrying frame is a plane structure, or the bottom of the auxiliary carrying frame is an inclined structure.

5. The spinal canal laminoplasty internal fixation device for partial spinous process posterior displacement according to claim 1, characterized in that: A hollow main cavity is distributed in the main bearing frame, and medicine particles are arranged in the main cavity; a hollow sub-cavity is distributed in the sub-bearing frame, and medicine particles are arranged in the sub-cavity.

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