阅读说明：本技术 椎管扩大装置 (Spinal canal enlarging device ) 是由 闫伟 于 2021-11-01 设计创作，主要内容包括：本发明提供了一种椎管扩大装置,包括：固定件,包括安装板和位于安装板两端的摆动板；多个支撑板,多个支撑板可移动地设置于安装板上,多个支撑板对应设置,多个支撑板具有相互远离的支撑位置以及相互靠近的安装位置；锁定件,连接于摆动板和支撑板之间；扩张件,设置于多个支撑板之间。本申请的技术方案有效地解决了相关技术中的传统手术方式无法有效地实现彻底减压的问题。(The present invention provides a spinal canal enlargement apparatus comprising: the fixing piece comprises a mounting plate and swing plates positioned at two ends of the mounting plate; the supporting plates are movably arranged on the mounting plate and are correspondingly arranged, and the supporting plates are provided with supporting positions far away from each other and mounting positions close to each other; a locking member connected between the swing plate and the support plate; and the expansion piece is arranged among the plurality of support plates. The technical scheme of the application effectively solves the problem that complete decompression cannot be effectively realized in the traditional operation mode in the related technology.)

1. A spinal canal enlargement device, comprising:

the fixing piece (10) comprises a mounting plate (11) and swing plates (12) positioned at two ends of the mounting plate (11);

the supporting plates (20) are movably arranged on the mounting plate (11), the supporting plates (20) are correspondingly arranged, and the supporting plates (20) have supporting positions far away from each other and mounting positions close to each other;

a locking member (30) connected between the swing plate (12) and the support plate (20);

an expansion member (40) disposed between the plurality of support plates (20).

2. The spinal canal enlargement device according to claim 1, characterized in that the swinging plate (12) is bent, the swinging plate (12) being pivotally connected with the mounting plate (11).

3. The spinal canal expansion device according to claim 1, characterized in that the mounting plate (11) comprises a first plate body (111) and a second plate body (112) which are arranged in an overlapping manner, the first plate body (111) and the second plate body (112) are arranged in a relatively sliding manner, a first groove body is arranged on the first plate body (111), a second groove body is arranged on the second plate body (112), the first groove body and the second groove body jointly form a mounting groove (13), and when the first plate body (111) and the second plate body (112) move from a position close to a position far away from the position, the length of the mounting groove (13) is gradually increased.

4. The spinal canal enlargement device according to claim 3, further comprising a chute structure (50) disposed between the first plate (111) and the second plate (112), the chute structure (50) comprising a chute (51) disposed on the second plate (112) and a slider (52) disposed on the first plate (111), the slider (52) being movably disposed within the chute (51).

5. The spinal canal enlargement device according to claim 3, characterized in that a stopper (60) is disposed on the support plate (20), and the stopper (60) is disposed on the support plate (20) and in limit-fitting engagement with the first plate (111) to prevent the support plate (20) from being detached from the mounting groove (13).

6. The spinal canal expansion device of claim 1, wherein the expansion member (40) is compressible in a configuration such that the width B of the expansion member (40) gradually increases as the expansion member (40) is compressed.

7. The spinal canal expansion device of claim 1, further comprising a withdrawal prevention member (70), said withdrawal prevention member (70) being disposed on an outer surface of said support plate (20).

8. The spinal canal enlargement device according to claim 7, characterized in that the end of the anti-back member (70) away from the support plate (20) is provided with an anti-back slope (71), the distance between the anti-back slope (71) and the support plate (20) gradually decreasing in the direction from the fixing member (10) to the end away from the fixing member (10).

9. The spinal canal enlargement device according to any one of claims 1 to 8, characterized in that a bar-shaped hole (121) is provided on the swing plate (12), a fixing hole (21) is provided on the support plate (20), and the locking member (30) comprises a screw which is inserted through the bar-shaped hole (121) and connected with the fixing hole (21).

10. The spinal canal enlargement device according to any one of claims 1 to 8, characterized in that the inner surface of the support plate (20) is a straight surface, the outer surface of the support plate (20) is an inclined surface, and the outer surfaces of two symmetrically disposed support plates (20) form an angle between 5 ° and 30 °.

11. The spinal canal expansion device according to any one of claims 1 to 8, characterized in that the width D of the support plate (20) gradually increases in a direction from near to far from the mounting plate (11), and the end of the support plate (20) far from the mounting plate (11) is provided with a protrusion (22).

Technical Field

The invention relates to the technical field of vertebral canal expansion, in particular to a vertebral canal expansion device.

Background

The cervical spondylotic myelopathy is a serious type of degenerative cervical spondylosis, and is characterized in that nerve symptoms such as paresthesia or paralysis of limbs are caused due to compression of cervical marrow or nerve roots, and the disease develops progressively, and surgical intervention is required after diagnosis to relieve the compression of the spinal cord or nerve roots, prevent further deterioration of nerve functions and improve the life quality of patients.

The cervical vertebra canal enlargement is a traditional operation method for reducing the pressure of the posterior path of cervical spondylosis, and the operation needs to cut off vertebral plates through the posterior path, so as to enlarge the area of the vertebral canal and achieve the purpose of reducing the pressure. However, this procedure has the following disadvantages: after the vertebral plate is cut off, the back of the spinal cord is not protected, so that the risk of spinal cord injury is increased; the cervical vertebra posterior column stability is lost, and the cervical kyphosis is easy to cause; the local scar of the operation shrinks and occupies the space of the vertebral canal, and the thorough decompression can not be realized.

Disclosure of Invention

The invention mainly aims to provide a vertebral canal enlarging device to solve the problem that complete decompression cannot be effectively realized in the traditional operation mode in the related art.

In order to achieve the above object, the present invention provides a vertebral canal enlargement device comprising: the fixing piece comprises a mounting plate and swing plates positioned at two ends of the mounting plate; the supporting plates are movably arranged on the mounting plate and are correspondingly arranged, and the supporting plates are provided with supporting positions far away from each other and mounting positions close to each other; a locking member connected between the swing plate and the support plate; and the expansion piece is arranged among the plurality of support plates.

Further, the swing plate is bent and is pivotally connected with the mounting plate.

Further, the mounting panel includes first plate body and the second plate body that the superpose set up, and first plate body and second plate body set up with relatively sliding, are provided with first cell body on the first plate body, are provided with the second cell body on the second plate body, and first cell body and second cell body form the mounting groove jointly, and first plate body and second plate body are by being close to the position to keeping away from the position when removing, and the length of mounting groove increases gradually.

Furthermore, the spinal canal enlarging device further comprises a slide way structure arranged between the first plate body and the second plate body, the slide way structure comprises a sliding groove arranged on the second plate body and a sliding block arranged on the first plate body, and the sliding block is movably arranged in the sliding groove.

Furthermore, a limiting part is arranged on the supporting plate, and the limiting part is arranged on the supporting plate and is in limiting fit with the first plate body so as to prevent the supporting plate from being separated from the mounting groove.

Further, the expansion element may be compressible to provide a gradual increase in width B of the expansion element as the expansion element is compressed.

Further, the spinal canal expanding device further comprises a withdrawal prevention piece, and the withdrawal prevention piece is arranged on the outer surface of the supporting plate.

Furthermore, one end, far away from the supporting plate, of the anti-withdrawal piece is provided with an anti-withdrawal inclined plane, and the distance between the anti-withdrawal inclined plane and the supporting plate is gradually reduced in the direction from the fixing piece to the direction far away from the fixing piece.

Furthermore, the swinging plate is provided with a strip-shaped hole, the supporting plate is provided with a fixing hole, the locking piece comprises a screw, and the screw penetrates through the strip-shaped hole and is connected with the fixing hole.

Furthermore, the inner surface of the supporting plate is a straight surface, the outer surface of the supporting plate is an inclined surface, and the included angle formed by the outer surfaces of the two symmetrically arranged supporting plates is between 5 degrees and 30 degrees.

Further, in the direction of being close to the mounting panel to keeping away from the mounting panel, the width D of backup pad increases gradually, and the one end that the mounting panel was kept away from to the backup pad is provided with the bulge.

By applying the technical scheme of the invention, the fixing piece comprises the mounting plate and the swinging plate, and the swinging plate can be arranged in a swinging manner. The plurality of support plates are movably arranged on the mounting plate, the plurality of support plates are correspondingly arranged, the plurality of support plates are provided with support positions far away from each other and mounting positions close to each other, and the locking piece is connected in front of the swinging plate and the support plates. The expansion elements are disposed between the plurality of support plates. Through the arrangement, the supporting plate is adjusted to the installation position, then the supporting plate is inserted into the incision of the cervical vertebra, the swinging plate swings to enable the swinging plate to contain the spinous process at the front end of the cervical vertebra, and the locking piece is sequentially connected with the swinging plate, the spinous process and the supporting plate, so that the fixing of the spinal canal expanding device is effectively realized. Later with the expansion piece fill in to corresponding between the backup pad that sets up, and then make the backup pad support the cervical vertebra, realized the expansion of canalis spinalis promptly, and then realized the effect of decompression. Therefore, the technical scheme of the application effectively solves the problem that the traditional operation mode in the related technology can not effectively realize thorough decompression.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a cross-sectional schematic view of an embodiment of a spinal canal expansion device according to the present invention;

fig. 2 shows a perspective view of the spinal canal enlargement apparatus of fig. 1;

FIG. 3 illustrates a perspective view of a mounting plate of the spinal canal enlargement apparatus of FIG. 2;

FIG. 4 shows a front schematic view of the spinal canal enlargement device of FIG. 1;

FIG. 5 shows a side cross-sectional view of the spinal canal enlargement device of FIG. 1

Fig. 6 shows a cross-sectional view of the spinal canal enlargement device of fig. 1 mounted to a bony structure.

Wherein the figures include the following reference numerals:

10. a fixing member; 11. mounting a plate; 111. a first plate body; 112. a second plate body; 12. a swing plate; 121. a strip-shaped hole; 13. mounting grooves; 20. a support plate; 21. a fixing hole; 22. a projection; 30. a locking member; 40. an expansion member; 50. a slideway structure; 51. a chute; 52. a slider; 60. a limiting member; 70. a withdrawal prevention member; 71. the anti-retreat inclined plane.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Because the conventional operation mode used in the related technology easily causes the loss of protection behind the spinal cord after the vertebral plate is cut off, the risk of spinal cord injury is increased; the cervical vertebra posterior column stability is lost, and the cervical kyphosis is easy to cause; the local scar of the operation shrinks and occupies the space of the vertebral canal, and the thorough decompression can not be realized. Aiming at the defects of the cervical vertebra canal enlargement operation, the technical scheme of the embodiment can effectively avoid the occurrence of postoperative complications and make up the defects of the prior art. The operation longitudinally cuts the spinous process, and separates the cut spinous process left and right, thereby achieving the purpose of expanding the volume of the vertebral canal. Implanting a vertebral canal expanding device to fix the spinous process and prevent the spinous process from closing again after opening the door.

In order to solve the above-mentioned technical problem, as shown in fig. 1, 2 and 4, in the present embodiment, the spinal canal enlargement apparatus includes: a fixing member 10, a plurality of support plates 20, a locking member 30, and an expansion member 40. The fixing member 10 includes a mounting plate 11 and swing plates 12 at both ends of the mounting plate 11. The plurality of support plates 20 are movably disposed on the mounting plate 11, the plurality of support plates 20 are correspondingly disposed, and the plurality of support plates 20 have support positions distant from each other and mounting positions close to each other. The locking member 30 is connected between the swing plate 12 and the support plate 20. The expansion member 40 is disposed between the plurality of support plates 20.

With the technical solution of the present embodiment, the fixing member 10 includes a mounting plate 11 and a swing plate 12, and the swing plate 12 is swingably disposed. The plurality of support plates 20 are movably disposed on the mounting plate 11, the plurality of support plates 20 are disposed correspondingly, the plurality of support plates 20 have support positions distant from each other and mounting positions close to each other, and the locking member 30 is attached in front of the swing plate 12 and the support plates 20. The expansion member 40 is disposed between the plurality of support plates 20. Through the above arrangement, the support plate 20 is adjusted to the mounting position, the support plate 20 is inserted into the incision of the cervical vertebrae, the swing plate 12 is swung to make the swing plate 12 include the spinous process at the front end of the cervical vertebrae, and the locking member 30 is sequentially connected to the swing plate 12, the spinous process and the support plate 20, thereby effectively realizing the fixation of the spinal canal enlargement device. Then the expansion piece 40 is plugged between the correspondingly arranged support plates 20, so that the support plates 20 support the cervical vertebra, namely, the expansion of the vertebral canal is realized, and the effect of pressure reduction is realized. Therefore, the technical scheme of the embodiment effectively solves the problem that the traditional operation mode in the related art cannot effectively realize thorough decompression.

It should be noted that the corresponding arrangement of the plurality of support plates 20 defines an even number of support plates 20. The close proximity means that the corresponding two support plates 20 are gradually attached, and the distant means that the distance between the corresponding two support plates 20 is gradually increased.

In order to facilitate the arrangement of the enclosure of the spinous processes, as shown in fig. 1 to 4, in the present embodiment, the oscillating plate 12 is bent, and the oscillating plate 12 is pivotally connected to the mounting plate 11. The above-described pivotal connection is simple in manner, and the swing of the swing plate 12 can be effectively achieved. Specifically, in the present embodiment, a concave portion is provided at an end portion of the swing plate 12, a convex portion is provided at an end portion of the mounting plate 11, the concave portion and the convex portion are in a plug-in fit, through holes are provided in the concave portion and the convex portion, and a lock pin is inserted into the through holes, thereby realizing the swing of the swing plate 12.

Of course, in embodiments not shown in the figures, hinge structures may also be provided between the swing plate and the mounting plate.

In consideration of the width of the support and the fixation of the overall structure, as shown in fig. 1 to 4, in the present embodiment, the mounting plate 11 includes a first plate 111 and a second plate 112 which are stacked, the first plate 111 and the second plate 112 are slidably disposed relative to each other, a first groove is disposed on the first plate 111, a second groove is disposed on the second plate 112, the first groove and the second groove together form the mounting groove 13, and the length of the mounting groove 13 gradually increases when the first plate 111 and the second plate 112 move from the close position to the far position. The length of the mounting groove 13 can be increased as the first and second plate bodies 111 and 112 are moved, so that the supporting distance of the support plate 20 is greater, thereby making the expansion effect better. Meanwhile, since the first plate body 111 and the second plate body 112 are movable, the first plate body 111, the second plate body 112 and the swing plate 12 can completely wrap the spinous processes, so that the fixation of the whole structure is more stable. Of course, the movement between the first board 111 and the second board 112 needs to be provided with an anti-falling device, so that the first board 111 and the second board 112 can be prevented from being separated, and the whole structure can be more stable.

In order to facilitate the movement of the first plate and the second plate, as shown in fig. 2 and 3, in this embodiment, the spinal canal enlargement apparatus further includes a slide structure 50 disposed between the first plate 111 and the second plate 112, the slide structure 50 includes a slide groove 51 disposed on the second plate 112 and a slide block 52 disposed on the first plate 111, and the slide block 52 is movably disposed in the slide groove 51. The slider 52 and the slide groove 51 are simple in structure and convenient to set. The sliding block 52 is disposed in the sliding groove 51, so that the first plate 111 and the second plate 112 can slide relatively, and meanwhile, in order to prevent the first plate 111 and the second plate 112 from being separated, a stop block is further disposed, the stop block is connected to an end portion of the sliding block 52, and the sliding groove 51 is located between the stop block and the mounting plate 11, so that the first plate 111 and the second plate 112 can be effectively prevented from being separated.

In order to prevent the support plate from being detached. As shown in fig. 2 and 3, in the present embodiment, the supporting plate 20 is provided with a limiting member 60, and the limiting member 60 is disposed on the supporting plate 20 and is in limiting fit with the first plate 111 to prevent the supporting plate 20 from being separated from the mounting slot 13. The structure of the limiting member 60 is simple, and the supporting plate 20 can be effectively prevented from being separated from the mounting groove 13, specifically, in this embodiment, the limiting member 60 is a limiting block, the limiting block is horizontally disposed on the mounting groove 13, and the length of the limiting block is greater than the width of the mounting groove 13.

In this embodiment, as shown in fig. 1, the expansion member 40 is compressible, and the width B of the expansion member 40 gradually increases as the expansion member 40 is compressed. The above arrangement enables the support width of the support plate 20 to be effectively adjusted, thereby achieving adjustment of the enlarged size of the spinal canal. If the patient desires to further enlarge the spinal canal for a period of time after surgery, the expansion member 40 can be adjusted through a minimally invasive incision on the posterior side of the spinous process. The distance between the supporting plates 20 is increased, so that the distance between the spinous processes on two sides after cutting is increased, and the aim of further expanding the vertebral canal is fulfilled.

In consideration of stability after the spinal canal expansion device, the spinal canal expansion device further includes a withdrawal prevention member 70, and the withdrawal prevention member 70 is provided on the outer surface of the support plate 20. The anti-back member 70 is provided to make the position of the support plate 20 more stable and prevent the support plate 20 from falling off from the cervical vertebrae.

In order to further enhance the releasing effect, as shown in fig. 1, 4, 5 and 6, in the embodiment, one end of the anti-releasing member 70 away from the supporting plate 20 is provided with an anti-releasing inclined surface 71, and the distance between the anti-releasing inclined surface 71 and the supporting plate 20 is gradually reduced in the direction from the fixing member 10 to the direction away from the fixing member 10. The anti-receding slope 71 has a simple structure and is convenient to set, and the distance between the anti-receding slope 71 and the support plate 20 is gradually reduced in the direction from the approach of the fixing member 10 to the distance from the fixing member 10, so that the anti-receding slope 71 can prevent the support plate 20 from being removed and can facilitate the insertion of the support plate 20 into the cervical vertebrae.

As shown in fig. 1, in the present embodiment, the swing plate 12 is provided with a bar-shaped hole 121, the support plate 20 is provided with a fixing hole 21, and the locking member 30 includes a screw passing through the bar-shaped hole 121 and connected to the fixing hole 21. The strip-shaped hole 121 is provided to enable a screw to be fixed, so that the situation that the screw is inclined to cause incapability of fixing is avoided.

In embodiments not shown in the figures, the locking element may also be a hydraulic element, a magnetic element or an elastic element, etc.

In order to further reduce the difficulty of implanting the fixing plate, as shown in fig. 1, 2, 4 and 6, in the present embodiment, the inner surface of the supporting plate 20 is a straight surface, the outer surface of the supporting plate 20 is an inclined surface, and the outer surfaces of the two symmetrically arranged supporting plates 20 form an included angle of 5 ° to 30 °. The angle is close to the included angle of the spread spinous process, so that the fitting between the support plate 20 and the spinous process cutting surface can be ensured to the maximum extent. This makes the support of the support plate 20 to the cervical vertebrae more stable. Specifically, the angle formed between the outer surfaces of the two support plates 20 symmetrically disposed in the present embodiment is 15 °.

In order to make the position of the fixing plate more stable, as shown in fig. 5, in the present embodiment, the width D of the support plate 20 is gradually increased in a direction from the mounting plate 11 to the mounting plate 11, and one end of the support plate 20 away from the mounting plate 11 is provided with a projection 22. The arrangement effectively increases the contact area between the support plate 20 and the spinous process cutting surface, so that the expansion effect is better and more stable. And the sagittal plane of the supporting plate 20 is approximately trapezoidal, which is similar to the shape of the spinous process section, so that the contact area can be maximally increased.

As shown in fig. 5, in the present embodiment, the support plate 20 includes a solid structure and a porous structure. Porous structure and entity structure print integrated into one piece through 3D. Porous structure sets up at the entity structurally, and porous structure is located the surface of backup pad 20, and the border department of the surface of backup pad 20 is the entity structure, and such setting makes backup pad 20 can realize biological fixed with the cervical vertebra to because the border department of backup pad 20 is the entity structure, can improve the structural strength of backup pad 20 effectively, prevent backup pad 20 deformation damage.

The technical scheme of this embodiment has kept the physiological structure and the mechanical structure of vertebral plate, does not influence its mechanics conduction when having guaranteed the vertebral plate integrality, has carried out abundant expansion to the canalis spinalis volume simultaneously. Meanwhile, the supporting plate in the technical scheme of the embodiment provides sufficient contact area, the trapezoid design of the sagittal plane is similar to the profile of the vertebral plate, the larger contact area effectively improves the stability of the implanted prosthesis, increases the binding force of the bone tissue and the prosthesis, and improves the fusion rate of the prosthesis. The porous structure can realize bone ingrowth and fusion can be realized without bone grafting. The cross section direction of the self-fixing and shaping vertebral plate fusion device designed by the invention is in a conical design, and the cone angle A is 5-30 degrees. The insertion of the prosthesis is convenient in the implantation process, and the cutting surface is attached to the side surface of the lifting plate after the spinous process is unfolded.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.