CN215129877U

CN215129877U - Adjustable growth valve and posterior spinal internal fixation system

Info

Publication number: CN215129877U
Application number: CN202120242714.9U
Authority: CN
Inventors: 仉建国; 赵军; 甄超; 董骧
Original assignee: Beijing Natong Medical Research Institute Co ltd; Tianjin Zhengtian Medical Instrument Co Ltd
Current assignee: Beijing Natong Medical Research Institute Co ltd; Tianjin Zhengtian Medical Instrument Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-12-14
Anticipated expiration: 2031-01-28

Abstract

The utility model discloses an adjustable growth valve and backbone way of escape internal fixation system belongs to orthopedic implant technical field, adjustable growth valve includes pipy valve body, the valve body has the first end that is used for the first connecting rod of plug-in connection, be equipped with logical groove on the first end, it is used for the extrusion to lead to the inslot the lockplate of first connecting rod, the first end is in the top of lockplate articulates there is rotatory back extrusion the cam of lockplate. The utility model discloses an adjustable growth valve and backbone way of escape internal fixation system, the first end of valve body are equipped with the lockplate that is used for extrudeing first connecting rod and the cam of rotatory back extrusion lockplate, extrude the lockplate through driving cam like this, and the lockplate will extrude and fix first connecting rod. Because lockplate and first connective bar area of contact between the two is big, the event the utility model discloses a connective bar locking is inseparabler, the difficult not hard up purpose.

Description

Adjustable growth valve and posterior spinal internal fixation system

Technical Field

The utility model relates to an orthopedic implant technical field especially indicates an adjustable growth valve and backbone way of escape internal fixation system.

Background

Spinal surgery aims to correct spinal deformities, relieve pain, stabilize the spine and protect nerves. The posterior spinal internal fixation is one of the main treatment means, and the safety and the effectiveness of the posterior spinal internal fixation system product used in the operation directly influence the treatment effect of diseases.

The thoracolumbar posterior fixation system is mainly suitable for degenerative diseases of thoracolumbar (intervertebral disc diseases, facet joint degeneration), instability (anterior shift, posterior shift, lateral shift and the like), slippage, trauma (fracture, dislocation, old fracture pseudoarthroplasty and the like), spinal stenosis, deformity (scoliosis, kyphosis, lordosis), tumors, infection (tuberculosis, suppurative spondylitis, cloth diseases and the like), thoracolumbar revision surgery and the like.

At present, an adjustable growth valve system is mostly adopted for a posterior spinal orthopedic system of children, and the length between two titanium rods connected with the growth valve can be adjusted according to the growth of children to meet the growth and development requirements of children. The traditional growth valve mostly adopts a mode of fixing a side nut of the valve body, is not tightly locked and is easy to loosen.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an adjustable growth valve and backbone way of escape internal fixation system, realize that the locking is inseparabler, the difficult not hard up purpose.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

on the one hand, provide an adjustable growth valve, including pipy valve body, the valve body has the first end that is used for the first connecting rod of plug-in connection, be equipped with logical groove on the first end, it is used for the extrusion to lead to the inslot be equipped with the lockplate of first connecting rod, the first end is in the top of lockplate articulates there is rotatory back extrusion the cam of lockplate.

Further, the first end portion is provided with a pair of extension arms at two sides of the through groove, and the cam is hinged to the extension arms.

Furthermore, the two sides of the locking plate are provided with connecting pins, and the extension arm is provided with pin holes matched with the connecting pins.

Further, first tip encircles and is equipped with first boss, lead to groove and extension arm all to be located first boss.

Furthermore, a second boss is arranged in the middle of the cam, and an instrument operation hole is formed in the second boss.

Further, the instrument operation hole is a threaded hole.

Furthermore, the lower surface of the locking plate is convex, and a longitudinal groove matched with the lower surface of the locking plate is formed in the first connecting rod;

and/or a third boss matched with the cam is arranged in the middle of the upper surface of the locking plate.

Furthermore, the valve body is provided with an observation window extending along the longitudinal direction, and the observation window is provided with scales.

Furthermore, two ends of the valve body are in a symmetrical structure form.

In another aspect, a posterior spinal fixation system is provided, comprising a pedicle screw and an adjustable growth valve as described above.

The utility model discloses following beneficial effect has:

the utility model discloses an adjustable growth valve and backbone way of escape internal fixation system, the first end of valve body are equipped with the lockplate that is used for extrudeing first connecting rod and the cam of rotatory back extrusion lockplate, extrude the lockplate through driving cam like this, and the lockplate will extrude and fix first connecting rod. Because lockplate and first connective bar area of contact between the two is big, the event the utility model discloses a connective bar locking is inseparabler, the difficult not hard up purpose.

Drawings

FIG. 1 is a schematic view of the overall structure of the adjustable growth valve of the present invention;

FIG. 2 is an exploded schematic view of the adjustable growth valve of FIG. 1;

FIG. 3 is a cross-sectional view of the end of the valve body of FIG. 1;

FIG. 4 is a schematic structural view of the valve body of FIG. 1, wherein (a) is a front sectional view and (b) is a top view;

FIG. 5 is a schematic structural view of the locking plate of FIG. 1, wherein (a) is a front view, (b) is a side view, and (c) is a top view;

fig. 6 is a schematic structural view of the cam of fig. 1, wherein (a) is a front view and (b) is a sectional view taken along a-a direction.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In one aspect, the utility model provides an adjustable growth valve, as shown in fig. 1-6, including pipy valve body 1, valve body 1 has the first end 11 that is used for the first connecting rod 2 of plug-in connection, is equipped with logical groove 12 on the first end 11, leads to the inslot and is equipped with the lockplate 13 that is used for extrudeing first connecting rod 11, and first end 11 is articulated (can specifically adopt round pin axle 19 to connect) in lockplate 13's top has rotatory back extrusion lockplate 13's cam 14. The through-groove 12 may be a rectangle extending along the length direction of the valve body 1, and the locking plate 13 may be a long strip.

Initially, the cam 14 is mounted in advance on the first end 11 of the valve body 1, and in use, the locking plate 13 is mounted in the through groove 12 from the inner side of the valve body 1, and then after the first connecting rod 2 is inserted into the first end 11 of the valve body 1 and adjusted to a proper distance, the rotating cam 14 presses the locking plate 13, so that the locking plate 13 presses and locks the first connecting rod 2.

The utility model discloses an adjustable growth valve, the first end of valve body are equipped with the lockplate that is used for extrudeing first connective bar and the cam of rotatory back extrusion lockplate, extrude the lockplate through the drive cam like this, and the lockplate will extrude and fix first connective bar. Because lockplate and first connective bar area of contact between the two is big, the event the utility model discloses a connective bar locking is inseparabler, the difficult not hard up purpose.

To facilitate mounting of the cam 14, the first end portion 11 may be provided with a pair of extension arms 15 on either side of the through slot 12, the cam 14 being hinged to the extension arms 15. In order to stably move the locking plate 13 up and down, the locking plate 13 may be provided with connecting pins 131 at both sides thereof, and the extension arm 15 may be provided with pin holes 16 to be engaged with the connecting pins 131 (i.e., the pin holes 16 penetrate the inner side wall of the first end portion 11 of the valve body 1 and extend into the extension arm 15). And, first tip 11 can encircle and be equipped with first boss 17 to improve the atress intensity of valve body 1 first tip 11, lead to groove 12 and extension arm 15 this moment and all can be located first boss 17.

The middle of the cam 14 may be provided with a second boss 141, and the second boss 141 is provided with an instrument operation hole 142, so that the cam 14 can be driven in a labor-saving manner. Further, the instrument manipulation hole 142 may be a threaded hole, and the distal end of the instrument is threadedly coupled to the instrument manipulation hole 142 to improve the coupling strength therebetween.

In order to improve the effect of the locking plate 13 cooperating with the first connecting rod 2, various ways that can be easily conceived by those skilled in the art can be adopted, for example, the first connecting rod 2 is a round rod, and the lower surface of the locking plate 13 is a concave round surface cooperating with the first connecting rod 2. However, in order to improve the fixing strength, the utility model discloses preferably adopt following structure: the lower surface of the locking plate 13 is convex, and the first connecting rod 2 is provided with a longitudinal groove 21 matched with the lower surface of the locking plate 13, so that the contact area between the locking plate and the first connecting rod can be greatly increased, and the fixing strength is improved.

The middle of the upper surface of the locking plate 13 may be provided with a third boss 132 cooperating with the cam 14, and the cam 14 can be more conveniently used to actuate the locking plate 13 by providing the third boss 132. In order to conveniently observe the specific position of the first connecting rod 2 in the valve body 1, an observation window 18 extending along the longitudinal direction can be arranged on the valve body 1, and in order to conveniently and accurately adjust the extending distance of the first connecting rod 2, scales can be arranged on the observation window 18.

According to the different structural style of the valve body other end, the utility model discloses can have following embodiment.

Example one

As shown in fig. 1-2, in the present embodiment, two ends of the valve body 1 are in a symmetrical structure form, that is: the valve body 1 is provided with a second end part 11 ' for connecting the second connecting rod 2 ' in a plugging way, a through groove 12 ' is arranged on the second end part 11 ', a locking plate 13 ' for extruding the second connecting rod 2 ' is arranged in the through groove 12 ', and a cam 14 ' for extruding the locking plate 13 ' after rotating is hinged on the second end part 11 ' above the locking plate 13 '.

In this embodiment, the both ends of valve body are equipped with the lockplate that is used for extrudeing two connective bars respectively and rotate the cam of back extrusion lockplate, can increase the distance that stretches out of connective bar, like this through drive cam extrusion lockplate, two connective bars will be extruded and fixed to the lockplate. Because lockplate and first connective bar area of contact between the two is big, the event the utility model discloses a connective bar locking is inseparabler, the difficult not hard up purpose.

Example two

In this embodiment, the other end of the valve body may adopt a fixed connection mode in which the connecting rod is not adjustable, and specifically, various connection modes that can be easily thought of by those skilled in the art may be adopted, such as a welding mode, a threaded connection mode and a screw plug fixing mode (that is, the other end of the valve body is provided with a mounting hole, the mounting hole is provided with an internal thread, the second connecting rod is threaded in the mounting hole, and the valve body is further provided with a screw plug for fixing the second connecting rod from the side), and the like.

The embodiment realizes the purposes of tighter locking and difficult loosening of the connecting rod on one side of the valve body.

On the other hand, the utility model provides a way internal fixation system behind backbone, including pedicle of vertebral arch screw and foretell adjustable growth valve, because the structure of adjustable growth valve is the same with last, no longer gives unnecessary details here.

The utility model discloses a way internal fixation system behind backbone, the first end of valve body are equipped with the lockplate that is used for extrudeing first connective bar and the cam of rotatory back extrusion lockplate, extrude the lockplate through the drive cam like this, and the lockplate will extrude and fix first connective bar. Because lockplate and first connective bar area of contact between the two is big, the event the utility model discloses a connective bar locking is inseparabler, the difficult not hard up purpose. The utility model is suitable for an orthopedics child orthopedic nail stick internal fixation system.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an adjustable growth valve, includes pipy valve body, the valve body has the first end that is used for the first connecting rod of plug-in connection, its characterized in that, be equipped with logical groove on the first end, it is used for the extrusion to lead to the inslot the lockplate of first connecting rod, the first end is in the top of lockplate articulates there is rotatory back extrusion the cam of lockplate.

2. The adjustable growth valve of claim 1, wherein the first end is provided with a pair of extension arms on either side of the channel, the cam being hinged on the extension arms.

3. The adjustable growth valve of claim 2, wherein the locking plate is provided with connecting pins on both sides thereof, and the extension arm is provided with pin holes for engaging with the connecting pins.

4. The adjustable growth valve of claim 2, wherein the first end is circumferentially provided with a first boss, the channel and the extension arm both being located on the first boss.

5. The adjustable growth valve of claim 1 wherein a second boss is provided in the middle of the cam, said second boss having an instrument access hole.

6. The adjustable growth valve of claim 5, wherein the instrument operation hole is a threaded hole.

7. The adjustable growth valve of claim 1, wherein the lower surface of the locking plate is convexly rounded, and the first connector bar is provided with a longitudinal groove that mates with the lower surface of the locking plate;

8. An adjustable growth valve according to claim 1, wherein the valve body is provided with a viewing window extending in the longitudinal direction, the viewing window being provided with a scale.

9. An adjustable growth valve according to any one of claims 1 to 8, wherein both ends of the valve body are of symmetrical construction.

10. A posterior spinal fixation system comprising a pedicle screw and an adjustable growth valve as claimed in any one of claims 1 to 9.