CN211750018U

CN211750018U - Pedicle screw nailing device

Info

Publication number: CN211750018U
Application number: CN202020221490.9U
Authority: CN
Inventors: 马雷; 高显达; 李严
Original assignee: Third Hospital of Hebei Medical University
Current assignee: Third Hospital of Hebei Medical University
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-10-27
Anticipated expiration: 2030-02-27

Abstract

The utility model provides a pedicle screw nailing device, belonging to the technical field of spinal surgery instruments, comprising an outer tube, a rotation stopping block and a working rod; the rotation stopping block is connected with the outer pipe; the working rod penetrates through the outer pipe and is provided with an external thread which is used for being in threaded connection with the tail cap; a gap for the rotation of the external thread is reserved between the rotation stopping block and the external thread of the working rod; the utility model discloses pedicle of vertebral arch screw is gone up to follow closely the device and is passed through the outer tube, the cooperation of only changeing piece and work rod, when needs are dismantled, insert the only changeing piece on the outer tube into the U-shaped arm once more, hold the outer tube with the hand, because the outer tube is fixed through the relative position of only changeing piece and tail cap, rotate the in-process of work rod, can reduce tail cap and the synchronous rotation of work rod, be convenient for with the work rod from the tail cap screw-out, thereby be convenient for this device and pedicle of vertebral arch screw separation, be convenient for carry out subsequent operation.

Description

Pedicle screw nailing device

Technical Field

The utility model belongs to the technical field of spinal surgery apparatus, more specifically say, relate to a pedicle of vertebral arch screw is followed closely device.

Background

The pedicle screw is used for being installed at the pedicle part of the vertebral column in the spinal surgery, the tail end of the pedicle screw is provided with a tail cap, internal threads are arranged in the tail cap, and the pedicle screw is provided with a hexagon socket; the pedicle screws can be divided into unidirectional screws, multidirectional screws and the like according to the installation rotation angle; the tail cap can be divided into a common nail and a long-arm nail according to the length of the U-shaped arm of the tail cap; the existing screw feeder comprises a sleeve and an inner rod, wherein one end of the inner rod is inserted into an inner hexagonal hole on a pedicle screw, and after the inner rod is rotated, the inner rod provides torque for the pedicle screw and can drive the pedicle screw to rotate; the sleeve is provided with an external thread, and the external thread of the sleeve is connected with the internal thread of the tail cap; however, in the prior art, the sleeve is in threaded connection with the tail cap, so that when the sleeve needs to be separated from the tail cap after an operation, the tail cap and the sleeve are easy to rotate synchronously, and the sleeve is inconvenient to take down.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pedicle of vertebral arch screw is followed closely device aims at solving among the prior art because the tail cap rotates in step with the sleeve pipe and inconvenient technical problem who takes off the sleeve pipe.

In order to achieve the above object, the utility model adopts the following technical scheme: the pedicle screw screwing device comprises an outer tube, a rotation stopping block and a working rod; the rotation stopping block is connected with the outer pipe and is used for being inserted into the U-shaped arm of the tail cap so as to fix the relative position of the outer pipe and the tail cap; the working rod penetrates through the outer tube and is provided with an external thread used for being in threaded connection with the tail cap, the end part provided with the external thread is used for abutting against the pedicle screw, and the other end of the working rod extends out of the outer tube; and a gap for rotating the external thread is reserved between the rotation stopping block and the external thread of the working rod.

As another embodiment of this application, be equipped with the butt post on the working rod, the butt post with the working rod is connected, the butt post is used for supporting tight pedicle of vertebral arch screw.

As another embodiment of this application, be equipped with the guide post on the butt post, the guide post is used for inserting the hexagonal hole in the interior of pedicle of vertebral arch screw, in order to right butt post axial positioning.

As another embodiment of the present application, the anti-rotation block is in contact with a groove wall of the U-shaped groove of the tail cap.

As another embodiment of the application, the number of the rotation stopping blocks is two, and the two rotation stopping blocks are symmetrically distributed about the axis of the outer pipe.

As another embodiment of the application, one end of the rotation stopping block, which is far away from the outer pipe, is provided with an arc surface.

As another embodiment of this application, the rotation stopping block with the cell wall contact department in U-shaped groove is provided with the ball, the ball with the rotation stopping block rotates to be connected, the ball is used for with the lateral wall contact in U-shaped groove.

As another embodiment of the application, the outer tube is provided with a holding sleeve, the holding sleeve is connected with the outer tube, and the outer wall of the holding sleeve is of a wave-shaped structure.

As another embodiment of the application, one end of the working rod extending out of the outer tube is provided with a rotary handle.

As another embodiment of the present application, the rotating handle is detachably connected to the working rod.

The utility model provides a pedicle screw goes up nail device's beneficial effect lies in: compared with the prior art, the pedicle screw nailing device has the advantages that through the matching of the outer tube, the rotation stopping block and the working rod, when the pedicle screw nailing device is used, the outer tube is sleeved on the working rod, and the rotation stopping block on the outer tube is inserted into the U-shaped arm of the tail cap; the outer pipe is held to keep the position of the tail cap still, the working rod is rotated to enable the external thread to be in threaded fit with the tail cap, the end part of the working rod is abutted against the pedicle screw, and the relative position of the pedicle screw and the tail cap is conveniently fixed; after the working rod is tightly propped against the pedicle screw, the outer tube slides upwards to separate the rotation stopping block from the working rod, and the pedicle screw is conveniently implanted into a prepared pedicle channel by holding the outer tube and rotating the working rod; when needs are dismantled, insert the U-shaped arm with the commentaries on classics piece on the outer tube once more in, hold the outer tube with the hand, because the outer tube is fixed through the relative position of commentaries on classics piece and tail cap, rotate the in-process of working rod, can reduce tail cap and the synchronous rotation of working rod, be convenient for unscrew the working rod from the tail cap to be convenient for this device and pedicle of vertebral arch screw separation, be convenient for carry out subsequent operation.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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.

Fig. 1 is a schematic structural view of a pedicle screw nailing device provided in an embodiment of the present invention;

fig. 2 is a schematic view of a holding sleeve part of a pedicle screw attaching device provided by an embodiment of the invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of a pedicle screw;

fig. 5 is a schematic view of a portion of the pedicle screw fitting and the abutment post of the pedicle screw fitting device provided by the embodiment of the invention;

fig. 6 is a schematic view of a rotating handle portion of the pedicle screw nailing device provided by the embodiment of the invention.

In the figure: 1. an outer tube; 11. a grip sleeve; 2. a rotation stopping block; 21. a ball bearing; 22. a circular arc surface; 3. a working lever; 31. an external thread; 32. a butting post; 33. a guide post; 34. connecting blocks; 4. turning a handle; 41. connecting holes; 5. pedicle screws; 51. a tail cap; 52. and (4) inner hexagonal holes.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 6 together, the pedicle screw attaching device of the present invention will now be described. The pedicle screw nailing device comprises an outer tube 1, a rotation stopping block 2 and a working rod 3; the rotation stopping block 2 is connected with the outer tube 1 and is used for being inserted into a U-shaped arm of the tail cap 51 so as to fix the relative positions of the outer tube 1 and the tail cap 51; the working rod 3 penetrates through the outer tube 1 and is provided with an external thread 31 for being in threaded connection with the tail cap 51, the end part provided with the external thread 31 is used for tightly abutting against the pedicle screw 5, and the other end of the working rod extends out of the outer tube 1; a gap for rotating the external thread 31 is reserved between the rotation stop block 2 and the external thread 31 of the working rod 3.

Compared with the prior art, the pedicle screw nailing device provided by the utility model has the advantages that the outer tube 1 is sleeved on the working rod 3, and the rotation stopping block 2 on the outer tube 1 is inserted into the U-shaped arm of the tail cap 51 through the matching of the outer tube 1, the rotation stopping block 2 and the working rod 3; the outer tube 1 is held to keep the position of the tail cap 51 still, the working rod 3 is rotated to enable the external thread 31 to be in threaded fit with the tail cap 51, the end part of the working rod 3 is enabled to be tightly propped against the pedicle screw 5, and the relative position of the pedicle screw 5 and the tail cap 51 is conveniently fixed; after the working rod 3 is tightly abutted against the pedicle screw 5, the outer tube 1 slides upwards to separate the rotation stopping block 2 from the working rod 3, and the pedicle screw 5 is conveniently implanted into a prepared pedicle channel by holding the outer tube 1 and rotating the working rod 3; when needs are dismantled, insert the U-shaped arm with the piece 2 that splines on the outer tube 1 once more in, hold outer tube 1 with the hand, because outer tube 1 fixes through the relative position of the piece 2 that splines with tail cap 51, the in-process of rotating work rod 3 can reduce tail cap 51 and the synchronous rotation of work rod 3, is convenient for unscrew work rod 3 from tail cap 51 to be convenient for this device and pedicle of vertebral arch screw 5 separation, be convenient for carry out subsequent operation.

As a specific embodiment of the pedicle screw nailing device provided by the present invention, please refer to fig. 1 to 6, a butting column 32 is disposed on the working rod 3, the butting column 32 is fixedly connected with the working rod 3, and the butting column 32 is used for butting against the pedicle screw 5; the rotation stopping block 2 is arranged at the end part of the outer tube 1 and fixedly connected with the outer tube 1, one end of the working rod 3 with threads is abutted against the pedicle screw 5, the part of the working rod 3 with threads is damaged, the working rod 3 is abutted against the pedicle screw 5 through the abutting column 32, on one hand, the position between the pedicle screw 5 and the tail cap 51 can be fixed, and on the other hand, the damage to the outer threads 31 can be reduced; in the process of connecting the working rod 3 and the tail cap 51 through threads, the abutting column 32 on the working rod 3 continuously moves towards the pedicle screw 5 and finally abuts against the pedicle screw 5 tightly to fix the relative position of the pedicle screw 5 and the tail cap 51, so that when the pedicle screw 5 is implanted into a prepared pedicle channel, the working rod 3 is rotated to drive the pedicle screw 5 to rotate.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a guiding post 33 is disposed on the abutting post 32, the guiding post 33 is used for being inserted into the hexagon socket 52 of the pedicle screw 5 to axially position the abutting post 32; the guide column 33 is used for being inserted into the hexagon socket 52 of the pedicle screw 5, and the diameter of the guide column 33 is smaller than the minimum diameter of the hexagon socket 52, so that the guide column 33 can be inserted into and extracted from the hexagon socket 52 and can rotate in the hexagon socket 52; the abutment post 32 is connected to the pedicle screw 5 by a guide post 33, which facilitates better abutment of the abutment post 32 against the pedicle screw 5.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, the rotation stopping block 2 contacts with the groove wall of the U-shaped groove of the tail cap 51, and after the rotation stopping block 2 is inserted into the U-shaped groove of the tail cap 51, the side wall of the rotation stopping block 2 is attached to the groove wall of the U-shaped groove; when dismantling, because outer tube 1 pegs graft with tail cap 51 through the anti-rotation piece 2 to be convenient for control tail cap 51 through holding outer tube 1, at the in-process of rotating work rod 3, can reduce tail cap 51 and the synchronous rotation of work rod 3, thereby be convenient for work rod 3 and the separation of tail cap 51.

As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 6, there are two rotation stopping blocks 2, and the two rotation stopping blocks 2 are symmetrically distributed about the axis of the outer tube 1; two sides of the U-shaped groove are communicated with the outer wall of the tail cap 51, and the two rotation stopping blocks 2 are respectively inserted into the U-shaped groove from two sides of the U-shaped groove; because two standstill piece 2 all with outer tube 1 fixed connection, outer tube 1 is connected with tail cap 51 through two standstill piece 2, at the in-process that rotates down working rod 3 from tail cap 51, outer tube 1 can provide the moment of torsion to tail cap 51 well, reduces tail cap 51 and the synchronous rotation of working rod 3, under the prerequisite of not rotating pedicle of vertebral arch screw 5, is convenient for spin down working rod 3 from tail cap 51 to be convenient for this device and tail cap 51 separation.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a ball 21 is disposed at a contact position of the rotation stopping block 2 and the wall of the U-shaped groove, the ball 21 is rotatably connected to the rotation stopping block 2, and the ball 21 is used for contacting the wall of the U-shaped groove; one end of the rotation stopping block 2 far away from the outer pipe 1 is provided with an arc surface 22; a groove for the rotation of the ball 21 is formed in the rotation stopping block 2, and the ball 21 is placed in the groove; the groove is communicated with the side wall of the rotation stopping block 2 to form an opening, the ball 21 is partially positioned outside the opening, and the diameter of the opening is smaller than that of the ball 21; in the process that the rotation stopping block 2 is inserted into the tail cap 51, the ball 21 is contacted with the side wall of the U-shaped arm; the rotation preventing block 2 is in contact with the U-shaped arm through the ball 21, thereby facilitating the insertion of the rotation preventing block 2 into the tail cap 51 and the extraction of the rotation preventing block 2 from the tail cap 51.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, a holding sleeve 11 is disposed on an outer tube 1, the holding sleeve 11 is connected to the outer tube 1, and an outer wall of the holding sleeve 11 is a wave-shaped structure; the holding sleeve 11 is fixedly connected with the outer tube 1, the holding rod is of a wave-shaped structure, and is convenient to hold by hands, so that when the device is disassembled, the tail cap 51 and the working rod 3 are convenient to rotate synchronously, and the device is convenient to separate from the pedicle screw 5.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, one end of the working rod 3 extending out of the outer tube 1 is provided with a rotating handle 4, the working rod 3 can be driven to rotate by rotating the rotating handle 4, so as to facilitate the working rod 3 to be screwed into the tail cap 51 and to facilitate the working rod 3 to be screwed down from the tail cap 51.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 6, the rotary handle 4 is detachably connected to the working rod 3, one end of the working rod 3 away from the external thread 31 is fixedly connected to a connecting block 34 having a rectangular cross section, the rotary handle 4 is provided with a connecting hole 41 for plugging the connecting block 34, and the cross section of the connecting hole 41 is rectangular; the handle is inserted into the connecting block 34 on the working rod 3 through the connecting hole 41, so that the connection between the rotating handle 4 and the working rod 3 is convenient to strengthen, the working rod 3 can be driven to rotate by rotating the rotating handle 4, and the pedicle screw 5 is convenient to implant into a prepared pedicle channel.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Pedicle of vertebral arch screw is followed closely device on, its characterized in that includes:

an outer tube (1);

the rotation stopping block (2) is connected with the outer pipe (1) and is used for being inserted into a U-shaped arm of the tail cap (51) to fix the relative position of the outer pipe (1) and the tail cap (51); and

the working rod (3) penetrates through the outer tube (1) and is provided with an external thread (31) which is in threaded connection with the tail cap (51), the end part provided with the external thread (31) is used for abutting against the pedicle screw (5), and the other end of the working rod extends out of the outer tube (1);

and a gap for rotating the external thread (31) is reserved between the rotation stopping block (2) and the external thread (31) of the working rod (3).

2. The pedicle screw nailing device according to claim 1, wherein the working rod (3) is provided with an abutment post (32), the abutment post (32) is connected with the working rod (3), and the abutment post (32) is used for abutting against the pedicle screw (5).

3. The pedicle screw nailing device according to claim 2, wherein the abutment post (32) is provided with a guiding post (33), the guiding post (33) being adapted to be inserted into a hexagonal socket (52) of a pedicle screw (5) for axially positioning the abutment post (32).

4. The pedicle screw nailing device according to claim 1, wherein the anti-rotation block (2) is in contact with the wall of the U-shaped groove of the tail cap (51).

5. The pedicle screw nailing device according to claim 1, wherein the number of the rotation preventing blocks (2) is two, and the two rotation preventing blocks (2) are symmetrically distributed about the axis of the outer tube (1).

6. The pedicle screw nailing device according to claim 5, wherein an end of the rotation stop block (2) away from the outer tube (1) is provided with a circular arc surface (22).

7. The pedicle screw nailing device according to claim 4, wherein a ball (21) is arranged at the contact part of the rotation stopping block (2) and the wall of the U-shaped groove, the ball (21) is rotatably connected with the rotation stopping block (2), and the ball (21) is used for contacting with the side wall of the U-shaped groove.

8. The pedicle screw nailing device according to claim 1, wherein a holding sleeve (11) is arranged on the outer tube (1), the holding sleeve (11) is connected with the outer tube (1), and the outer wall of the holding sleeve (11) is of a wave-shaped structure.

9. The pedicle screw nailing device according to claim 8, wherein a rotary handle (4) is provided at an end of the working rod (3) extending out of the outer tube (1).

10. The pedicle screw nailing device according to claim 9, wherein the rotary handle (4) is detachably connected to the working rod (3).