CN212281789U

CN212281789U - Interspinous fusion device

Info

Publication number: CN212281789U
Application number: CN202022148350.6U
Authority: CN
Inventors: 王彪; 郝定均; 赵勤鹏; 张永远; 赵赫; 张海平; 孙宏慧; 王宇航
Original assignee: Xian Honghui Hospital
Current assignee: Xian Honghui Hospital
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-05
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses an interspinous fusion device, which comprises a cover plate, an anti-drop bolt part, a fusion main plate and a bottom plate; the fusion main plate comprises two fusion side plates which are oppositely arranged, and the two fusion side plates are respectively arranged on two sides of the spinous process; the anti-falling bolt passes through the fusion side plate and is fixed with the spinous process; a fusion cavity for filling bone blocks is formed between the two fusion side plates; the cover plate covers the fusion cavity and is fixedly connected with the upper parts of the two fusion side plates; the bottom plate is arranged at the bottoms of the two fusion side plates and is connected with the two fusion side plates. The utility model provides a fuse device between spinous process, the device can realize minimal access surgery to lumbar vertebrae unstability and mild lumbar vertebrae slippage non-neurological symptom's patient, fixes spinous process fast and realizes fusing, improves operation efficiency and security.

Description

Interspinous fusion device

Technical Field

The utility model relates to the field of medical equipment, concretely relates to interspinous fusion device.

Background

With the development of minimally invasive spinal techniques, spinal surgeries are becoming more refined and minimally invasive, and thus the complications and surgical risks of patients are becoming smaller and smaller. For patients with lumbar instability and mild lumbar spondylolisthesis without neurological symptoms, currently, minimally invasive Oblique Lateral Intervertebral Fusion (OLIF) becomes a minimally invasive spinal surgery hot spot operation for treating the diseases. Compared with the traditional lumbar extreme lateral interbody fusion (XLIF) and lateral entry interbody fusion (DLIF) in minimally invasive surgery modes, the lumbar vertebra and lumbar plexus nerve protection device can better protect the lumbar muscle and lumbar plexus nerves by utilizing the natural gap between the retroperitoneal abdominal aorta and the anterior edge of the psoas major, and effectively reduce the problems of postoperative hip flexion weakness, pain, abnormal thigh sensation and the like. However, in clinical practice, there is a risk of complications of OLIF surgical procedures, such as vascular injury, ureteral injury, sympathetic nerve injury to the abdominal cavity, Cage subsidence, infection, pseudoarthrosis, prosthesis migration, and stomal hernia.

Can such patients with lumbar instability and mild spondylolisthesis be treated by minimally invasive surgery with less surgical risk? Based on the idea, the lumbar vertebra posterior interspinous fusion is proposed to treat the diseases.

SUMMERY OF THE UTILITY MODEL

In order to realize the not enough of the last apparatus of the operation of the lumbar vertebrae back way interspinous fusion, the utility model provides an interspinous fusion device, the device can realize minimal access surgery to the patient of lumbar vertebrae unstability and mild lumbar vertebrae slippage no nerve symptom, fixes the spinous process fast and realizes fusing, improves operation efficiency and security.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an interspinous fusion device comprises a cover plate, an anti-dropping bolt piece, a fusion main plate and a bottom plate;

the fusion main plate comprises two fusion side plates which are oppositely arranged, and the two fusion side plates are respectively arranged on two sides of the spinous process; the anti-falling bolt passes through the fusion side plate and is fixed with the spinous process; a fusion cavity for filling bone blocks is formed between the two fusion side plates;

the cover plate covers the fusion cavity and is fixedly connected with the upper parts of the two fusion side plates;

the bottom plate is arranged at the bottoms of the two fusion side plates and is connected with the two fusion side plates.

As a further improvement of the utility model, a groove is arranged on one side of the fusion side plate contacting with the spinous process; and a through hole for the anti-dropping bolt to pass through is formed in the fusion side plate corresponding to the groove.

As a further improvement of the utility model, it is fixed with the fusion curb plate that the apron passes through the apron screw, it is provided with and is used for with apron screwed connection's screw hole to fuse the curb plate top.

As a further improvement, the anti-dropping bolt piece is a short screw, and two fused side plates are respectively provided with an anti-dropping bolt piece for fixing the same spinous process.

As a further improvement of the utility model, the anti-dropping bolt piece is a long screw, and the two fusion side plates penetrate through the fixed spinous process through the anti-dropping bolt piece;

the anti-drop bolt piece comprises a bolt rod, a first nut and a second nut; the bolt rod is a screw rod with a tip end, a first thread section, a bolt head, a second thread section, a smooth section and a third thread section are sequentially arranged on the screw rod, and the first thread section is in threaded connection with a first nut; the third thread section is arranged on the tip end and is in threaded connection with the second nut; the second thread section and the third thread section are respectively used for being in threaded connection with the two fused side plates.

As a further improvement of the present invention, the length of the smooth section is smaller than the distance between the two fused side plates.

As a further improvement, the fusion is provided with the counter bore on the curb plate and prevents changeing the nut, prevents changeing the nut setting in the counter bore, prevent changeing the nut setting and be in counter bore one side can restrict when preventing changeing the nut after rotating first nut is rotatory.

As a further improvement of the utility model, the apron with fuse the mainboard and be dull and stereotyped or have porous structure board.

As a further improvement of the utility model, the width of the bottom plate is less than the distance between the two anti-dropping bolt pieces;

the bottom plate and the bottom of one fusion side plate are integrally formed, and the bottom of the other fusion side plate is provided with a slot for inserting the bottom plate;

or the bottom plate is provided with two side bottoms which are respectively and integrally formed with the bottoms of the two fusion side plates.

As a further improvement, apron, anticreep bolt spare, fusion mainboard and bottom plate all adopt 3D to print the shaping.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the interspinous fusion device of the utility model mainly comprises a cover plate, an anti-dropping bolt piece and a fusion main plate, wherein two fusion side plates are respectively arranged at the outer sides of two spinous processes, and the anti-dropping bolt piece passes through the spinous processes to fix the two fusion side plates; a fusion cavity for filling bone blocks is formed between the two fusion main plates for bone fusion. The device simple structure, the operation is fixed convenient, can realize fast that the operation is fixed to solve patient's minimal access surgery through the amalgamation of lumbar vertebrae way of escape interspinous process, improve the operation security.

Drawings

Fig. 1 is a perspective view of an interspinous fusion device of the present invention;

fig. 2 is a top view of an interspinous process fusion device of the present invention;

FIG. 3 is a top view of FIG. 1 with the cover plate removed;

FIG. 4 is a schematic view of the drop-off preventing bolt member;

fig. 5 is a perspective view of an interspinous process fusion device of the present invention;

fig. 6 is a perspective view three of an interspinous fusion device of the utility model;

fig. 7 is a perspective view of another embodiment of the present invention;

fig. 8 is a perspective view of another embodiment of the present invention;

fig. 9 is a perspective view of another embodiment of the present invention;

wherein, 1 is a cover plate; 2 is an anti-drop bolt piece; 3 is a fusion main board; 4 is a bottom plate; 11 is a cover plate screw; 20 is a bolt; 21 is a first thread segment; 22 is a bolt head; 23 is a second thread segment; 24 is a smooth section; 25 is a third thread segment; 26 is a first nut; 27 is a second nut; 30 is a fusion side plate; 31 is a screw hole; 32 is a groove; 33 is a counter bore; 34 is an anti-rotation nut; 41 are slots.

Detailed Description

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

In order to make the objects, technical solutions and advantages of the present invention clearer, the following description of the embodiments of the present invention with reference to the accompanying drawings and examples is provided for explaining the present invention without limitation.

In order to realize the lumbar vertebra posterior interspinous fusion to treat the diseases, the application provides the interspinous fusion device corresponding to the novel operation. As shown in fig. 1 to 3, the interspinous fusion device of the present invention includes a cover plate 1, an anti-dropping bolt 2, a fusion main plate 3 and a bottom plate 4;

the fusion main plate 3 comprises two fusion side plates 30 which are oppositely arranged, and the two fusion side plates 30 are respectively arranged at two sides of the spinous process; the anti-falling bolt 2 penetrates through the fusion side plate 30 and is fixed with the spinous process; a fusion cavity for filling bone blocks is formed between the two fusion side plates 30;

the cover plate 1 covers the fusion cavity and is fixedly connected with the upper parts of the two fusion side plates 30;

the bottom plate 4 is arranged at the bottom of the two fusion side plates 30 and is connected with the two fusion side plates 30.

In the specific operation, the patient is exposed to the spinous process of the corresponding segment of the diseased vertebra, the supraspinous and interspinous ligaments are removed, and the surface of the bone is ground by using a high-speed abrasive drill. The interspinous fusion device described herein is then installed. Fixing two fusion side plates 30 at two sides of the corresponding spinous processes, and fixing the two fusion side plates 30 by penetrating the spinous processes through anti-falling bolt pieces 2; filling bone blocks or artificial bones in the fusion cavity, and covering the cover plate 1 to seal to complete the operation.

The patient can relieve the symptoms of lower back pain caused by axial instability after the patient is fixedly fused because the intervertebral instability disappears. The operation has the advantages of smaller wound, simple approach, no important visceral organs around the operation area and small operation risk.

In order to make the spinous process contact with the fusion side plate 30 well, a groove is provided on the side of the fusion side plate 30 contacting with the spinous process. The spinous process after grinding the surface of the bone is disposed in the groove to prevent sliding. The fusion side plate 30 corresponding to the groove is provided with a through hole for the anti-dropping bolt 2 to pass through, and the anti-dropping bolt 2 passes through the through hole.

As a preferred embodiment, the fusion side plate 30 can adopt a 3D printing and forming technology to measure three-dimensional data of the spinous process of the patient in advance, and perform 3D forming of an accurate position, for example, the structure and shape of the groove 32 can realize formation and size consistent with the surface of the spinous process of the patient, so that the subsequent operation is more convenient and easier to fix.

Preferably, the cover plate 1 is fixed to the fusion side plate 30 by a cover plate screw 11, and a screw hole 31 is formed at the top of the fusion side plate 30. The cover plate is quickly fixed through the cover plate screw 11 after being covered.

Wherein, the anti-drop bolt piece 2 is a short bolt or a long bolt,

when short screws are adopted, two sides of the two fusion side plates 30 are respectively provided with an anti-falling bolt piece 2 for fixing the same spinous process. Four screws are required for two spinous processes.

When long screws are adopted, the two fusion side plates 30 penetrate through the fixed spinous processes through the anti-falling bolt pieces 2; as shown in fig. 4 and 5, the anti-drop bolt 2 includes a bolt rod 20, a first nut 26 and a second nut 27; the bolt rod 20 is a screw rod with a tip end, a first thread section 21, a bolt head 22, a second thread section 23, a smooth section 24 and a third thread section 25 are sequentially arranged on the screw rod, and the first thread section 21 is in threaded connection with a first nut 26; a third thread segment 25 is provided on the tip, the third thread segment 25 being in threaded connection with a second nut 27.

Specifically, a first thread section 21, a bolt head 22, a second thread section 23, a smooth section 24 and a third thread section 25 are sequentially arranged on the screw, and the third thread section 25 is used for drilling and fixing another fused main plate. The smooth section 24 is arranged in the spinous process, the second thread section 23 is fixed with the fused main plate through threads, and the bolt head 22 clamps the inner wall of the counter bore of the fused main plate; the first thread segments 21 effect a secondary fixation to the first nut. The second thread segments 23 and the third thread segments 25 are respectively used for being in threaded connection with two fused side plates 30.

The length of the smooth section 24 is less than the distance between the two fused side plates 30. The third thread section 25 is arranged on the tip end and can play a role of penetrating through the spinous process, and the thread is not needed after the third thread section passes through the spinous process, so that the smooth section 24 is adopted, the screw rod can pass through the smooth section quickly, and the operation efficiency is improved.

As shown in fig. 1 and 6, a counterbore 33 and an anti-rotation nut 34 are provided on the fusion side plate 30, the anti-rotation nut 34 is disposed in the counterbore 33, and the anti-rotation nut 34 is disposed on one side of the counterbore 33 for limiting the rotation of the first nut 26. When the first nut (26) is rotated by 180 degrees, the first nut can be limited from rotating and loosening.

Example 1

As shown in fig. 1 to fig. 6, the embodiment provides a specific solution that the fusion main board and the cover board are flat boards.

Example 2

As shown in fig. 6 to 9, in this embodiment, the fused main plate and the cover plate are plates with porous structure.

In addition, the width of the bottom plate 4 is required to be smaller than the distance between the two anti-drop bolt pieces 2;

example 3

As shown in fig. 1 to 6, the present embodiment provides a specific solution that the bottom plate 4 is integrally formed with the bottom of one fused side plate 30, and the bottom of the other fused side plate 30 is provided with an insertion slot 41 for inserting the bottom plate 4; the slot 41 is also provided with a locking nut for locking the base plate 4.

Example 4

As shown in fig. 9, the embodiment provides a specific solution that the bottom plate 4 has two side bottoms, and the two side bottoms are respectively integrally formed with the bottoms of the two fused side plates 30.

In order to make the operation more meticulous and individuation, apron 1, anticreep bolt spare 2, fusion mainboard 3 and bottom plate 4 all can adopt 3D to print the shaping according to patient's individuation image data, also can print the bone grafting piece of corresponding size, make it become an organic whole and more be favorable to the postoperative to fuse.

In addition, the operation mode and the related novel interspinous fusion device can also be used as a supplementary fusion mode of the conventional lumbar interbody fusion operation, so that the fusion of the anterior column and the posterior column of the vertebral body is realized, the fusion of the lumbar vertebra by 360 degrees is completed, the curative effect of the lumbar interbody fusion operation is more exact, and the fusion rate is higher.

The above-described embodiments are merely illustrative of implementations of the invention that enable those skilled in the art to make or use the invention, and the description is not intended to be limiting. Therefore, the present invention should not be limited to the embodiments shown herein, and all the additions and equivalents made according to the technical features of the present invention are intended to fall within the scope of the present application.

Claims

1. An interspinous fusion device is characterized by comprising a cover plate (1), an anti-dropping bolt piece (2), a fusion main plate (3) and a bottom plate (4);

the fusion main plate (3) comprises two fusion side plates (30) which are oppositely arranged, and the two fusion side plates (30) are respectively arranged on two sides of the spinous process; the anti-falling bolt piece (2) penetrates through the fusion side plate (30) and is fixed with the spinous process; a fusion cavity for filling bone blocks is formed between the two fusion side plates (30);

the cover plate (1) covers the fusion cavity and is fixedly connected with the upper parts of the two fusion side plates (30);

the bottom plate (4) is arranged at the bottom of the two fusion side plates (30) and is connected with the two fusion side plates (30).

2. An interspinous process fusion device according to claim 1, wherein the fusion side plate (30) is provided with a recess (32) on the side in contact with the spinous process; and a through hole for the anti-falling bolt piece (2) to pass through is formed in the fusion side plate (30) corresponding to the groove.

3. An interspinous fusion device according to claim 1, characterized in that the cover plate (1) is fixed with a fusion side plate (30) by a cover plate screw (11), and the top of the fusion side plate (30) is provided with a screw hole (31) for connecting with the cover plate screw (11).

4. An interspinous process fusion device according to claim 1, characterized in that the anti-dropping bolt member (2) is a short screw, and two anti-dropping bolt members (2) are respectively provided on both sides of the two fusion side plates (30) to fix the same spinous process.

5. An interspinous process fusion device according to claim 1, characterized in that the anti-drop bolt member (2) is a long screw, and the two fusion side plates (30) are fixed to the spinous processes by one anti-drop bolt member (2) penetrating therethrough;

the anti-drop bolt piece (2) comprises a bolt rod (20), a first nut (26) and a second nut (27); the bolt rod (20) is a screw rod with a tip end, a first thread section (21), a bolt head (22), a second thread section (23), a smooth section (24) and a third thread section (25) are sequentially arranged on the screw rod, and the first thread section (21) is in threaded connection with a first nut (26); the third thread section (25) is arranged on the tip, and the third thread section (25) is in threaded connection with the second nut (27); the second thread section (23) and the third thread section (25) are respectively used for being in threaded connection with the two fused side plates (30).

6. An interspinous process fusion device according to claim 5, characterized in that the length of the smooth section (24) is less than the distance between the two fusion side plates (30).

7. An interspinous process fusion device according to claim 5, characterized in that the fusion side plate (30) is provided with a counter bore (33) and an anti-rotation nut (34), the anti-rotation nut (34) being disposed in the counter bore (33), the anti-rotation nut (34) being disposed on one side of the counter bore (33) and being capable of restricting the rotation of the first nut (26) when the anti-rotation nut (34) is rotated.

8. An interspinous process fusion device according to claim 1, characterized in that the cover plate (1) and the fusion main plate (3) are flat plates or plates with a porous structure.

9. An interspinous process fusion device according to claim 1, characterized in that the width of the base plate (4) is less than the distance between the two anti-drop bolt pieces (2);

the bottom plate (4) and the bottom of one fusion side plate (30) are integrally formed, and the bottom of the other fusion side plate (30) is provided with a slot (41) for inserting the bottom plate (4);

or the bottom plate (4) is provided with two side bottoms which are respectively and integrally formed with the bottoms of the two fusion side plates (30).

10. An interspinous process fusion device according to claim 1, characterized in that the cover plate (1), the anti-dropping bolt member (2), the fusion main plate (3) and the base plate (4) are formed by 3D printing.