CN107669375B

CN107669375B - Spinal posterior device

Info

Publication number: CN107669375B
Application number: CN201711020503.5A
Authority: CN
Inventors: 王臻; 李健
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2017-10-26
Filing date: 2017-10-26
Publication date: 2023-09-12
Anticipated expiration: 2037-10-26
Also published as: CN107669375A

Abstract

The present application provides a posterior spinal device comprising: the connecting part is used for being connected with the rear road nail rod; and the protection sleeve is connected with the connecting part, and a lumen for accommodating spinal cord is formed in the protection sleeve. The spinal column posterior device is connected with the posterior nail rod through the connecting part, so that the spinal column posterior device is positioned at an osteotomy position, the spinal cord is wrapped by the protective sleeve, tissues such as vertebral arch and the like of an osteotomy are replaced, the lumen is equivalent to the vertebral canal of a vertebral body of a human body, the purpose of protecting the spinal cord is achieved, other tissues are prevented from growing into and pressing the spinal cord, and postoperative risks are reduced.

Description

Spinal posterior device

Technical Field

The application relates to the field of medical equipment, in particular to a spinal column posterior device.

Background

The spine of a human body is damaged due to the influence of patients or external force, such as infectious diseases of vertebrotumor, severe comminuted fracture, tuberculosis and the like, and spinal cord and nerve damage or collapse of vertebral segments and angulation deformity of the spine can be caused, and the vertebroplasty is often required for patients with nerve dysfunction or angulation deformity.

After vertebrotomy, surrounding tissues can resume growth, tumors and tuberculosis have the possibility of continuing to relapse, the surrounding tissues or pathological tissues can possibly grow into the positions of the original vertebral canal, the space of the tissues such as vertebral canal nerves is occupied, and symptoms such as postoperative recurrent nerve dysfunction and the like are caused, so that the need of secondary operation or revision operation is caused, and even the risk of paralysis of a patient exists.

Disclosure of Invention

The application mainly aims to provide a spinal column posterior device which is used for solving the problem of lack of protection of spinal cord after vertebrotomy in the prior art.

In order to achieve the above object, the present application provides a posterior spinal device comprising: the connecting part is used for being connected with the rear road nail rod; and the protection sleeve is connected with the connecting part, and a lumen for accommodating spinal cord is formed in the protection sleeve.

Further, the protective sleeve includes: one end of the first sleeve wall is hinged with the connecting part; and one end of the second sleeve wall is hinged with the connecting part, and the end of the first sleeve wall far away from the connecting part and the end of the second sleeve wall far away from the connecting part can be separated to open the lumen or be butted to close the lumen.

Further, when the end of the first sleeve wall away from the connecting portion is separated from the end of the second sleeve wall away from the connecting portion to the limit position, the center angle of the opening of the lumen is greater than 90 degrees.

Further, the spinal column posterior device further comprises a connecting shaft, the connecting shaft is arranged in parallel with the direction of the spinal cord, and the first sleeve wall and the second sleeve wall are connected with the connecting shaft through hinges.

Further, the posterior spinal device may further include a locking pin disposed on the connecting shaft for locking the first cannula wall and the second cannula wall.

Further, the connecting shaft is located the rear side of connecting portion, and the one end that keeps away from connecting portion of first sleeve wall and the one end that keeps away from connecting portion of second sleeve wall dock at the front side of connecting portion, have seted up the opening of stepping down on the connecting portion to step down for first sleeve wall and second sleeve wall.

Further, an end of the first sleeve wall away from the connecting portion and an end of the second sleeve wall away from the connecting portion are butted at a front side of the connecting portion; the posterior spinal device further includes: a first handle arranged at the rear side of the connecting part and connected with the first sleeve wall; and a second handle arranged at the rear side of the connecting part and connected with the second sleeve wall.

Further, the connecting portion includes: the main body is plate-shaped, and the protective sleeve is connected with the main body; the grapples are respectively arranged at the edges of the two sides of the main body and are used for being connected with the rear road nailing rod.

Further, the main part is the arc, and the rear side of the middle part orientation of main part is crooked, and the radian in the middle part of main part and the radian looks adaptation of lumen.

Further, at least a portion of the connection portion and/or at least a portion of the protective sleeve is in a bone trabecular configuration.

The spinal column posterior device is connected with the posterior nail rod through the connecting part, so that the spinal column posterior device is positioned at an osteotomy position, the spinal cord is wrapped by the protective sleeve, tissues such as vertebral arch and the like of an osteotomy are replaced, the lumen is equivalent to the vertebral canal of a vertebral body of a human body, the purpose of protecting the spinal cord is achieved, other tissues are prevented from growing into and pressing the spinal cord, and postoperative risks are reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic perspective view of an embodiment of a posterior spinal device according to the present application;

FIG. 2 shows an axial schematic view of an embodiment of a posterior spinal device according to the present application;

FIG. 3 shows a lateral schematic view of spinal tissue with the spinal posterior device of the present application; and

fig. 4 shows a schematic forward view of spinal tissue with the posterior spinal device of the present application.

Wherein the above figures include the following reference numerals:

10. a main body; 11. a grapple; 12. a relief opening; 21. a first sleeve wall; 22. a second sleeve wall; 23. a first handle; 24. a second handle; 30. a connecting shaft; 100. a rear path nailing rod; 200. a lumen.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The present application provides a posterior spinal device, as shown in fig. 1 to 4, comprising: a connection part for connection with the rear spike rod 100; a protective sleeve is connected with the connecting part, and a lumen 200 for accommodating spinal cord is formed in the protective sleeve.

The spinal column posterior device is connected with the posterior nail rod 100 through the connecting part, so that the spinal column posterior device is positioned at an osteotomy position, the spinal cord is wrapped by the protective sleeve, tissues such as vertebral arch to be osteotomy are replaced, the lumen 200 corresponds to the vertebral canal of the vertebral body of a human body, the purpose of protecting the spinal cord is achieved, other tissues are prevented from growing into and pressing the spinal cord, and the postoperative risk is reduced.

Preferably, the inner wall of lumen 200 is smooth, i.e., is high profile, to provide both protection to the spinal canal and reduced adhesion to soft tissue.

Preferably, the protective sleeve includes: a first sleeve wall 21, one end of which is hinged to the connecting portion; the second sleeve wall 22 is hinged at one end to the connection, and the end of the first sleeve wall 21 remote from the connection and the end of the second sleeve wall 22 remote from the connection can be separated to open the lumen 200 or butted to close the lumen 200.

More preferably, the central angle of the opening of the lumen 200 is greater than 90 degrees when the end of the first sleeve wall 21 remote from the connection is separated from the end of the second sleeve wall 22 remote from the connection to the extreme position.

The opening of the lumen 200 is preferably centered at an angle greater than 120 degrees so that the spinal cord can be distracted when the posterior spinal device is installed so that the spinal cord can smoothly enter the lumen 200.

Preferably, the axial cross-section of the first sleeve wall 21 is in the shape of a half arc, and the axial cross-section of the second sleeve wall 22 is in the shape of a half arc symmetrical to the first sleeve wall 21.

Preferably, the posterior spinal device further includes a connecting shaft 30, the connecting shaft 30 being disposed parallel to the direction of the spinal cord, and the first sleeve wall 21 and the second sleeve wall 22 each being connected to the connecting shaft 30 by a hinge.

As in the embodiment shown in fig. 1 and 2, the first sleeve wall 21 and the second sleeve wall 22 are each provided with a shaft hole, and the connecting shaft 30 is inserted into the shaft holes to form a hinge structure, so that the first sleeve wall 21 and the second sleeve wall 22 can both rotate around the connecting shaft 30.

Preferably, the posterior spinal device further includes a locking pin disposed on the connecting shaft 30 for locking the first cannula wall 21 and the second cannula wall 22. The locking pin has a locked state and an unlocked state, and when the first sleeve wall 21 and the second sleeve wall 22 are closed to close the lumen 200, the locking pin is switched to the locked state to lock the first sleeve wall 21 and the second sleeve wall 22.

Preferably, the connecting shaft 30 is located at the rear side of the connecting portion, and the end of the first sleeve wall 21 away from the connecting portion and the end of the second sleeve wall 22 away from the connecting portion are butted at the front side of the connecting portion, and the connecting portion is provided with a yielding opening 12 to yield the first sleeve wall 21 and the second sleeve wall 22.

As shown in fig. 1, the relief opening 12 is rectangular, and the relief openings 12 of the relief first sleeve wall 21 and the second sleeve wall 22 are provided on the left side and the right side of the connecting shaft 30, respectively, and when the first sleeve wall 21 or the second sleeve wall 22 is in the open position, a portion of the first sleeve wall 21 or a portion of the second sleeve wall 22 is located at or passes through the relief opening 12.

Preferably, the end of the first sleeve wall 21 remote from the connection portion and the end of the second sleeve wall 22 remote from the connection portion are butted at the front side of the connection portion; the posterior spinal device further includes: a first handle 23 provided at the rear side of the connection portion and connected to the first socket wall 21; a second handle 24 is provided at the rear side of the connection portion and is connected to the second sleeve wall 22.

In the embodiment shown in fig. 1 and 2, the first handle 23 and the first sleeve wall 21 are located on both sides of the connecting shaft 30, respectively, the second handle 24 and the second sleeve wall 22 are located on both sides of the connecting shaft 30, respectively, and the first handle 23, the first sleeve wall 21, the second handle 24 and the second sleeve wall 22 together form a butterfly clip structure.

More preferably, the second handle 24 has a larger size than the first handle 23, and the second handle 24 is further provided with a relief hole for letting out the first handle 23, thereby increasing the opening angle of the first and second sleeve walls 21 and 22.

Preferably, the connection portion includes: a main body 10 having a plate shape, and a protection sleeve coupled to the main body 10; a plurality of grapples 11 are provided at both side edges of the main body 10, respectively, for connection with the rear spike rod 100.

In the embodiment shown in fig. 1 and 2, 4 grapples 11 are symmetrically provided on the main body 10, and the grapples 11 are connected to the side end surfaces of the main body 10 and extend in a direction away from the spinal cord.

More preferably, the body 10 is curved, and the middle of the body 10 is curved toward the rear side, and the curvature of the middle of the body 10 is adapted to the curvature of the lumen 200.

As shown in fig. 2, the axial section of the main body 10 is arcuate, and this natural curvature causes the main body 10 to have an arc adapted to the vertebral body of the human body, which is of anatomical engineering design.

Preferably, at least a portion of the connection and/or at least a portion of the protective sleeve is in the form of a bone trabecular structure.

More preferably, the back of the body 10 is of trabecular bone structure, thereby enabling the body 10 to act as a bone bed for bone grafting, facilitating bone ingrowth to create a stable long-term fixation effect.

The trabecular bone structure is a microporous structure which facilitates bone cell ingrowth, and is a multi-directional microporous structure in which pores have diameters of 500 μm to 1000 μm, preferably 800 μm, which are interconnected. The pore is favorable for bone cell to creep in, so that the joint surface of the bone trabecular structure of the postoperative vertebral body prosthesis and the physiological bone structure are subjected to bone fusion to achieve long-term stability.

The vertebral prosthesis is made of medical metal, wherein the medical metal comprises but is not limited to titanium, titanium alloy, cobalt alloy, stainless steel, tantalum metal, magnesium alloy and the like, the metal material is regulated in international standard of ISO-5830 series, and the biocompatibility of the vertebral prosthesis is proved by practice of orthopedic implantation application for many years at home and abroad.

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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A posterior spinal device, comprising:

a connection part for connection with a rear spike rod (100);

a protective sleeve connected with the connecting part, wherein a lumen (200) for accommodating spinal cord is formed in the protective sleeve;

the protective sleeve includes:

a first sleeve wall (21) hinged at one end to the connection;

a second sleeve wall (22) hinged at one end to the connection, an end of the first sleeve wall (21) remote from the connection being separable from an end of the second sleeve wall (22) remote from the connection to open the lumen (200) or to dock to close the lumen (200);

the posterior spinal device further comprises a connecting shaft (30), the connecting shaft (30) is arranged in parallel with the direction of the spinal cord, and the first sleeve wall (21) and the second sleeve wall (22) are connected with the connecting shaft (30) through hinges;

wherein, the connecting portion includes:

and a body (10) having a plate shape, wherein the protective sleeve is connected to the body (10).

2. The posterior spinal device of claim 1, wherein the opening of the lumen (200) is centered at an angle greater than 90 degrees when the end of the first cannula wall (21) distal from the connection is separated from the end of the second cannula wall (22) distal from the connection to a limit position.

3. The posterior spinal device of claim 1, further comprising a locking pin disposed on the connecting shaft (30) for locking the first cannula wall (21) and the second cannula wall (22).

4. The posterior spinal device according to claim 1, wherein the connecting shaft (30) is located at a rear side of the connecting portion, an end of the first sleeve wall (21) remote from the connecting portion and an end of the second sleeve wall (22) remote from the connecting portion are butted at a front side of the connecting portion, and a yielding opening (12) is formed in the connecting portion to yield the first sleeve wall (21) and the second sleeve wall (22).

5. The posterior spinal device of claim 1, wherein an end of the first cannula wall (21) remote from the connection portion and an end of the second cannula wall (22) remote from the connection portion are butted on a front side of the connection portion; the posterior spinal device further includes:

a first handle (23) provided at the rear side of the connecting portion and connected to the first sleeve wall (21);

and a second handle (24) which is provided on the rear side of the connection portion and is connected to the second sleeve wall (22).

6. The posterior spinal device of claim 1, wherein the connection portion further comprises:

the plurality of grapples (11) are respectively arranged at the edges of the two sides of the main body (10) and are used for being connected with the rear road nailing rod (100).

7. The posterior spinal device of claim 6, wherein the body (10) is curved with a central portion of the body (10) curved toward a posterior side, the central portion of the body (10) having a curvature that matches the curvature of the lumen (200).

8. A posterior spinal device according to any one of claims 1-7, wherein at least a portion of the connection portion and/or at least a portion of the protective sleeve is in a trabecular bone configuration.