CN214804983U - Intervertebral spreader with adjustable lumbar vertebra pedicle of vertebral arch screw and scale - Google Patents

Abstract

The utility model discloses a lumbar vertebrae pedicle of vertebral arch screw adjustable intervertebral spreader with scales, which comprises an adjusting rod, wherein the front end of the adjusting rod is fixedly connected with a fixed arm, the side wall of the adjusting rod is connected with a movable arm in a sliding way, the movable arm and the fixed arm are arranged in parallel, the fixed arm and one end of the movable arm far away from the adjusting rod are both connected with a sleeve through an adjusting device, the inner part of the sleeve is engaged and sleeved with a lock rod for connecting the pedicle of vertebral arch screw, and the inside of the lock rod is provided with a driving mechanism for driving the pedicle of vertebral arch nut to rotate. Providing intraoperative stability.

Description

Intervertebral spreader with adjustable lumbar vertebra pedicle of vertebral arch screw and scale

Technical Field

The utility model relates to the technical field of intervertebral operation instruments, in particular to an intervertebral spreader with scales and adjustable lumbar vertebral pedicle screws.

Background

Along with the change of life style of people, the incidence rate of lumbar degenerative diseases is obviously increased, severe lumbar intervertebral disc protrusion, spinal stenosis, lumbar spondylolisthesis, degenerative lumbar lateral curvature and other diseases are usually accompanied by one side or two sides of intervertebral space extremely narrow, in the treatment process, the narrow vertebral canal needs to be enlarged and intervertebral space intervertebral foramen needs to be expanded, so that the clamping pressure of the dural sac and nerve roots is relieved, and the diseases are cured;

traditional intervertebral struts ware is generally including the distraction arm that struts intervertebral space, the ware front end will be strutted during the operation inserts in the tail cap of adjacent pedicle of vertebral arch screw, then hold distracter upper portion hard, strut adjacent centrum in the certain limit, but it is not stable enough to be connected between ordinary distracter front end and the pedicle of vertebral arch screw, the ware that struts easily slips, and the mode that struts of current intervertebral struts ware generally adopts criss-cross mode, can take place to incline between two pedicle of vertebral arch screws after being strutted, cause the centrum of strutting to take place the dislocation, reduce the precision of strutting the centrum, on the other hand struts the ware arm and is straight, occupied lumbar vertebrae operation operating space, block and influenced the operation, therefore we have provided an intervertebral struts ware through adjustable take scale of lumbar vertebrae pedicle of vertebral arch screw.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a take intervertebral ware that struts of scale with adjustable through lumbar vertebrae pedicle of vertebral arch screw to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a take intervertebral ware of strutting of scale with adjustable through lumbar vertebrae pedicle of vertebral arch screw, includes the regulation pole, the front end fixedly connected with fixed arm of regulation pole, sliding connection has the carriage release arm on the lateral wall of regulation pole, carriage release arm and fixed arm parallel arrangement, the one end that the regulation pole was kept away from to fixed arm and carriage release arm all is connected with the sleeve through adjusting device, telescopic inside meshing cover has connect the locking lever that is used for connecting the pedicle of vertebral arch screw, telescopic lateral wall and fixedly connected with turning handle are run through to the upper end of locking lever, the inside of locking lever is equipped with and is used for driving pedicle of vertebral arch nut pivoted actuating mechanism.

Preferably, the adjusting device comprises a connecting arm, a pin shaft is rotatably connected to the front end of the connecting arm, a butt joint block is meshed and connected to the threaded end of the pin shaft, a T-shaped block is inserted into the side wall of the butt joint block and fixed to the butt joint block through a bolt, and one side of the T-shaped block is fixedly connected to the side wall of the sleeve.

Preferably, the two connecting arms are respectively connected with the fixed arm and the moving arm in a rotating manner.

Preferably, the interior of the adjusting rod is rotatably connected with a screw, one end of the screw penetrates through the side wall of the adjusting rod and is fixedly connected with a driving handle, and one end of the moving arm close to the adjusting rod is meshed and sleeved on the side wall of the screw.

Preferably, the side wall of the adjusting rod is marked with scale marks, and the side wall of the moving arm is fixedly connected with a pointer.

Preferably, actuating mechanism includes the dwang, the inside at the locking lever is connected in the dwang meshing, the upper end of dwang runs through the lateral wall and the fixedly connected with knob of locking lever, just the lower extreme of dwang is inside to have a telescopic link through a spring sliding connection, the lower extreme of telescopic link runs through the lateral wall and the fixedly connected with of dwang and is used for pegging graft at the inside driving head of pedicle of vertebral arch nut, fixedly connected with joint dish on the inner wall of locking lever, fixedly connected with joint pole on the lateral wall of telescopic link, joint pole activity joint is on the last side of joint dish.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model makes the moving arm move towards one side far away from the fixed arm on the adjusting rod by rotating the screw rod, when the screw rod stops rotating, the moving arm is fixed after moving, thus the intervertebral space is not required to be manually exerted all the time after being expanded, the intervertebral space can be kept stable and unchanged in the expanded state, and the operation intensity is reduced;

2. the utility model discloses a after the locking lever is rotated downwards, the lower extreme of locking lever is connected with the threaded engagement of pedicle of vertebral arch screw after stretching out from the inside of sleeve, then realize stabilizing pedicle of vertebral arch screw and sleeve and fixing, the easy slippage nature of the contact connection of having avoided traditional spreader and pedicle of vertebral arch screw, the effectual intervertebral space that struts, slide through driving two sleeves, because the locking lever meshing is connected on pedicle of vertebral arch screw this moment, realize strutting two pedicle of vertebral arch screws in parallel, be about to strut two lumbar vertebrae parallel with pedicle of vertebral arch screw connection, further improve the efficiency and the quality of lumbar vertebrae operation, shorten the operation time, improve operation safety and success rate, alleviate patient's misery;

3. the utility model rotates the connecting arm on the pin shaft, so that the adjusting rod, the fixed arm, the moving arm and other parts rotate to one side, thereby avoiding influencing the operation and providing a good and wide operation space for the intervertebral space operation;

4. the utility model discloses a rotate the dwang, can drive the pedicle of vertebral arch nut and rotate in the inside of pedicle of vertebral arch screw, can directly screw up or unscrew the pedicle of vertebral arch nut then, improved the convenience of operation.

Drawings

FIG. 1 is a schematic view of an application of the present invention;

FIG. 2 is a schematic view II of the present invention;

FIG. 3 is a schematic view of the present invention;

FIG. 4 is an exploded view of the present invention;

FIG. 5 is a schematic diagram IV of the application of the present invention;

fig. 6 is a schematic structural view of the sleeve, the lock rod, the connecting arm, the pin shaft and the T-shaped block of the present invention;

fig. 7 is an exploded view of the sleeve, the connecting arm, the pin shaft, the T-shaped block and the butt-joint block of the present invention;

FIG. 8 is a cross-sectional view of the sleeve and locking bar of the present invention;

FIG. 9 is a cross-sectional exploded view of the sleeve, locking rod, rotating rod, telescoping rod and driving head of the present invention;

fig. 10 is a cross-sectional view of the lock rod, the rotating rod, the telescopic rod and the driving head of the present invention;

FIG. 11 is a cross-sectional view of the lock rod, the telescopic rod and the driving head of the present invention;

fig. 12 is an enlarged view of fig. 11 at a;

fig. 13 is an exploded view of the adjusting lever, the screw, the fixing arm and the moving arm of the present invention.

In the figure: 1. adjusting rod, 2, fixed arm, 3, moving arm, 4, adjusting device, 401, connecting arm, 402, pin shaft, 403, butt joint block, 404, T-shaped block, 405, bolt, 5, sleeve, 6, locking rod, 7, screw, 8, driving mechanism, 9, pointer, 10, scale mark, 11, rotating rod, 12, first spring, 13, telescopic rod, 14, driving head, 15, clamping disk, 16, clamping rod, 17, stop dog, 18, through groove, 19, connecting rod, 20, driving handle, 21, knob, 22, rotating handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-8 and 13, the present invention provides a technical solution: the utility model provides a take intervertebral ware that scales through adjustable lumbar vertebrae pedicle of vertebral arch screw, includes regulation pole 1, the front end fixedly connected with fixed arm 2 of regulation pole 1, sliding connection has the removal arm 3 on the lateral wall of regulation pole 1, removal arm 3 and fixed arm 2 parallel arrangement, the one end that the regulation pole 1 was kept away from to fixed arm 2 and removal arm 3 all is connected with sleeve 5 through adjusting device 4, the inside meshing cover of sleeve 5 has been cup jointed and is used for connecting the locking lever 6 of pedicle of vertebral arch screw, as shown in figure 4 and 8, rotate locking lever 6 after sleeve 5 aligns with pedicle of vertebral arch screw, locking lever 6 can move down and stretch out outside sleeve 5, and the screw thread of locking lever 6 is identical with the screw thread of pedicle of vertebral arch screw, and the inside of pedicle of vertebral arch screw can be twisted into to the lower extreme of vertebral arch screw of vertebral arch, realize sleeve 5 and the firm connection of pedicle of vertebral arch screw then, the upper end of locking lever 6 runs through the lateral wall of sleeve 5 and fixedly connected with turning handle 22, the rotation of the locking rod 6 is driven by a rotating handle 22 at the upper end of the locking rod 6, when the rotating handle 22 rotates, the locking rod 6 rotates along with the rotating handle 22, and a driving mechanism 8 for driving the rotation of the pedicle screw cap is arranged inside the locking rod 6.

As shown in fig. 1-2, after the sleeve 5 is fixed to the pedicle screw through the locking rod 6, in order to enable the adjusting rod 1, the fixed arm 2 and the movable arm 3 to be arbitrarily turned to two sides for performing the surgical operation (sometimes having a more expanded view, and a doctor may occupy different surgical positions according to the situation in the operation), specifically, the adjusting device 4 includes a connecting arm 401, a pin 402 is rotatably connected to a front end of the connecting arm 401, a butt-joint block 403 is engaged and connected to a threaded end of the pin 402, as shown in fig. 7, one end of the pin 402 is a threaded end, the other end is a butterfly handle, the threaded end of the pin 402 penetrates through an end of the connecting arm 401, and the butt-joint block is fixed to the threaded end, the pin 402 is fixedly mounted on the connecting arm 401, at this time, the connecting arm 401 can rotate on the pin 402, a T-shaped block 404 is inserted on a side wall of the butt-joint block 403, the T-shaped block 404 is fixed on the butt-joint block 403 by a bolt 405, one side of the T-shaped block 404 is fixedly connected to the side wall of the sleeve 5, as shown in fig. 6, after the T-shaped block 404 is inserted into the butt-joint block 403, the T-shaped block is fixed by the bolt 405, and then the sleeve 5 and the connecting arm 401 can be quickly connected.

As shown in fig. 5, in order to change the angles of the adjusting rod 1, the fixed arm 2 and the moving arm 3 to cope with the installation and placement of different body positions and the conditions of different patients in the operation, specifically, the two connecting arms 401 are respectively rotatably connected with the fixed arm 2 and the moving arm 3, after the sleeve 5 is fixed to the pedicle screw through the locking rod 6, the adjusting rod 1, the fixed arm 2 and the moving arm 3 are angularly adjusted around the connecting arms 401, the adjusting rod 1 can be precisely placed, and the adjusting rod 1 and the fixed arm 2 may be opened with mounting holes (not shown in the figure) for connecting with fixing devices such as external brackets, thereby performing the positioning operation.

In order to drive the moving arm 3 to slide on the adjusting rod 1, specifically, a screw 7 is rotatably connected inside the adjusting rod 1, one end of the screw 7 penetrates through the side wall of the adjusting rod 1 and is fixedly connected with a driving handle 20, one end of the moving arm 3 close to the adjusting rod 1 is engaged and sleeved on the side wall of the screw 7, as shown in fig. 3, the driving handle 20 at the end of the screw 7 is rotated, so that the screw 7 can be driven to rotate, and after the screw 7 is rotated, the moving arm 3 slides on the adjusting rod 1 along with the rotation of the screw 7.

In order to make the size of the expanded intervertebral space more accurate, specifically, scale marks 10 are carved on the side wall of the adjusting rod 1, and a pointer 9 is fixedly connected to the side wall of the moving arm 3, as shown in fig. 3, when the moving arm 3 slides on the adjusting rod 1, the pointer 9 slides along with the moving arm 3, and the scale of the pointer 9 pointing to the scale marks 10 at this time represents the size of the expanded intervertebral space, so that the size of the expanded intervertebral space is more accurate.

Example two:

referring to fig. 9-12, on the basis of the first embodiment, in order to realize that the locking rod 6 can drive the pedicle screw cap to rotate on the pedicle screw in the state that the sleeve 5 is connected with the pedicle screw, so as to lock the pedicle screw on the connecting rod 19, the driving mechanism 8 includes a rotating rod 11, the rotating rod 11 is engaged and connected inside the locking rod 6, the upper end of the rotating rod 11 penetrates through the side wall of the locking rod 6 and is fixedly connected with a knob 21, and the inside of the lower end of the rotating rod 11 is slidably connected with a telescopic rod 13 through a first spring 12, as shown in fig. 9, the upper end of the telescopic rod 13 is fixedly connected with a square block, the added square block can prevent the telescopic rod 13 and the rotating rod 11 from rotating, so that the telescopic rod 13 can drive the rotating rod 11 to rotate, and the first spring 12 plays a role of downward springing to the rotating rod 11 in a compressed state, the lower end of the telescopic rod 13 penetrates through the side wall of the rotating rod 11 and is fixedly connected with a driving head 14 inserted in the pedicle screw cap, as shown in fig. 11, the shape of the driving head 14 is matched with the size of the driving hole on the upper side of the pedicle screw cap, and the edge part of the lower end of the driving head 14 is chamfered, so that the pedicle screw cap can be conveniently driven by clamping after dislocation, the inner wall of the lock rod 6 is fixedly connected with a clamping disc 15, the side wall of the telescopic rod 13 is fixedly connected with a clamping rod 16, the clamping rod 16 is movably clamped on the upper side surface of the clamping disk 15, as shown in fig. 10, the upper side surface of the clamping disk 15 plays a clamping role on the clamping rod 16, when the pedicle screw cap does not need to be contacted with the connecting rod 19, the clamping rod 16 is clamped above the clamping disc 15, so that the driving head 14 at the bottom of the telescopic rod 13 cannot be contacted with the pedicle screw cap, and the rotation is avoided;

in addition, a through groove 18 is formed in the clamping disc 15, when the clamping rod 16 rotates along with the telescopic rod 13 and then aligns with the through groove 18 (see fig. 11 and 12), the clamping rod 16 can slide downwards along the through groove 18, a stop block 17 is fixedly connected inside the lock rod 6, the telescopic rod 13 is sleeved in the middle of the stop block 17, the function of limiting the position of the telescopic rod 13 is achieved, and the lower end (a driving head 14) of the telescopic rod 13 is prevented from deflecting; in addition, the size of the clamping rod 16 can be designed to be close to the cavity inside the locking rod 6, so that the function of preventing skew can be achieved.

As shown in fig. 10, when the pedicle screw cap is not required to be driven to rotate, the clamping rod 16 is clamped on the upper side surface of the clamping disk 15, the driving head 14 is retracted in the locking rod 6 (the telescopic rod 13 is retracted in the rotating rod 11, so that the first spring 12 is in a compressed state), when the pedicle screw cap needs to be driven to rotate, the rotating rod 11 is rotated, so that the rotating rod 11 drives the telescopic rod 13 to rotate together, after the clamping rod 16 rotates on the clamping disk 15, the clamping rod 16 is aligned with the through groove 18, the telescopic rod 13 slides downwards through the elasticity of the first spring 12, so that the driving head 14 is propped against the upper side surface of the pedicle nut by the elasticity of the first spring 12, the purpose of the form is that the driving head 14 and the driving hole of the pedicle nut can not be directly matched each time, and the driving head rotates after being extruded by the elasticity of the first spring 12, so that the matching clamping is convenient; the dwang 11 is rotated once more, after making the drive head 14 coincide with the drive hole of pedicle of vertebral arch nut, the inside in drive hole is inserted to drive head 14, then continue to rotate the dwang 11 after, can realize driving pedicle of vertebral arch nut at pedicle of vertebral arch screw internal rotation to can lock pedicle of vertebral arch screw on the connective bar 19, under this state, keep dwang 11 and sleeve 5 static, then rotate locking lever 6, can make locking lever 6 roll out from pedicle of vertebral arch screw's inside, realize breaking away from of sleeve 5 and pedicle of vertebral arch screw.

And this configuration, after removal, allows the driver head 14 to be manually squeezed and the knob 21 to be rotated to allow the snap rod 16 to pass through the slot 18 and then over the snap disk 15 for subsequent use.

The working principle is as follows: when the vertebral pedicle screw fixing device is used, firstly, a vertebral pedicle screw is fixed on a lumbar vertebra, a connecting rod 19 for connecting the vertebral pedicle screw is placed at a threaded end of the vertebral pedicle screw, then the vertebral pedicle screw is screwed in the vertebral pedicle screw, the vertebral pedicle screw does not compress the connecting rod 19 at the moment, the connecting rod 19 can move in the vertebral pedicle screw, then the lower ends of two sleeves 5 are respectively aligned with the threaded end openings of two adjacent vertebral pedicle screws, the locking rod 6 is rotated downwards, the lower end of the locking rod 6 extends out of the sleeves 5 and then is meshed into the vertebral pedicle screws, then the fixed connection of the vertebral pedicle screws and the sleeves 5 is realized (as shown in figures 1-2), the screw rod 7 is rotated in the state, the screw rod 7 drives the movable arm 3 to move on the adjusting rod 1, so that the distance between the two sleeves 5 is changed, and the vertebral pedicle screws prop open intervertebral space after moving along with the two sleeves 5, after the screw 7 stops rotating, the two sleeves 5 support the two pedicle screws to fix the intervertebral space in a distraction state, the rotating rod 11 is rotated downwards at the moment to drive the pedicle screw cap to rotate, and then the pedicle screw cap is pressed on the side wall of the connecting rod 19 after rotating, at the moment, the two pedicle screws are fixed in the distraction state through the connecting rod 19, and after the locking rod 6 is rotated upwards at the moment, the lower end of the locking rod 6 is withdrawn from the threaded end of the pedicle screw and retracted into the sleeves 5, so that the sleeves 5 are separated from the pedicle screws, and the intervertebral space distraction operation is completed;

in addition, in order to prevent the connecting rod 19 from interfering with the surgical operation (for example, to remove the diseased intervertebral disc after the intervertebral space is expanded), the connecting rod 19 may be inserted into the threaded end of the pedicle screw after the operation is finished, that is: fixing the pedicle screw on the lumbar vertebra, screwing the pedicle screw cap in the pedicle screw, leaving a space for inserting a connecting rod 19 below the pedicle screw cap, fixedly connecting the pedicle screw with a sleeve 5 (as shown in figure 1-2), expanding the intervertebral space in this state, supporting the two pedicle screws by the two sleeves 5 to fix the intervertebral space in the expanded state, performing an operation such as excision of the pathological intervertebral disc after expanding the intervertebral space, inserting the connecting rod 19 in the threaded end of the pedicle screw (below the pedicle screw cap) after expanding, rotating the rotating rod 11 downwards to enable the rotating rod 11 to drive the pedicle screw cap to rotate and then press on the side wall of the connecting rod 19, fixing the two pedicle screws in the expanded state through the connecting rod 19, and separating the sleeve 5 from the pedicle screw, and finishing the intervertebral space opening operation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a take intervertebral struts ware of scale with adjustable through lumbar vertebrae pedicle of vertebral arch screw which characterized in that: including adjusting pole (1), the front end fixedly connected with fixed arm (2) of adjusting pole (1), sliding connection has removal arm (3) on the lateral wall of adjusting pole (1), removal arm (3) and fixed arm (2) parallel arrangement, the one end that regulation pole (1) were kept away from in fixed arm (2) and removal arm (3) all is connected with sleeve (5) through adjusting device (4), locking lever (6) that are used for connecting the pedicle of vertebral arch screw have been cup jointed in the inside meshing of sleeve (5), lateral wall and fixedly connected with turning handle (22) of sleeve (5) are run through to the upper end of locking lever (6), the inside of locking lever (6) is equipped with and is used for driving pedicle of vertebral arch nut pivoted actuating mechanism (8).

2. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: adjusting device (4) include connecting arm (401), the front end of connecting arm (401) is rotated and is connected with round pin axle (402), the screw thread end meshing of round pin axle (402) is connected with butt joint piece (403), it has T type piece (404) to peg graft on the lateral wall of butt joint piece (403), T type piece (404) are fixed on butt joint piece (403) through bolt (405), one side fixed connection of T type piece (404) is on the lateral wall of sleeve (5).

3. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 2, wherein: the two connecting arms (401) are respectively connected with the fixed arm (2) and the moving arm (3) in a rotating mode.

4. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: the inside of adjusting pole (1) rotates and is connected with screw rod (7), the one end of screw rod (7) runs through the lateral wall of adjusting pole (1) and fixedly connected with drive handle (20), moving arm (3) are close to the meshing of the one end of adjusting pole (1) and are cup jointed on the lateral wall of screw rod (7).

5. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1 or 3, wherein: the side wall of the adjusting rod (1) is marked with scale marks (10), and the side wall of the moving arm (3) is fixedly connected with a pointer (9).

6. The lumbar pedicle screw adjustable graduated intervertebral distractor of claim 1, wherein: actuating mechanism (8) are including dwang (11), the inside at locking lever (6) is connected in dwang (11) meshing, the upper end of dwang (11) runs through the lateral wall and fixedly connected with knob (21) of locking lever (6), just there is telescopic link (13) inside through first spring (12) sliding connection of the lower extreme of dwang (11), the lateral wall and the fixedly connected with that the lower extreme of telescopic link (13) runs through dwang (11) are used for pegging graft at inside drive head (14) of pedicle of vertebral arch nut, fixedly connected with joint dish (15) on the inner wall of locking lever (6), fixedly connected with joint pole (16) on the lateral wall of telescopic link (13), joint pole (16) activity joint is on the last side of joint dish (15).

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