CN111839709A - Quantifiable distraction lifting device for lumbar spondylolisthesis reduction - Google Patents

Abstract

The invention discloses a quantificationally-distracting and lifting device for lumbar spondylolisthesis reduction, which comprises a vertical upper supporting rod, wherein the left side of the top end of the vertical upper supporting rod is integrally connected with a horizontal graduated scale, the bottom of the vertical upper supporting rod is rotatably connected with a sleeve A through a universal joint coupler, sawteeth are arranged at the top of the graduated scale along the length direction of the graduated scale, a vertebral body deviation rectifying device is horizontally and slidably connected onto the graduated scale, and the vertebral body deviation rectifying device is used for distracting and lifting the diseased spondylolisthesis part and restoring the diseased spondylolisthesis. According to the structure of the invention, the traditional mode of lifting and restoring the centrum by hands is changed, the distraction lifting device is adopted, after the centrum is distracted and lifted in the operation, the slippage pathological changes between the centrums can be effectively improved, the comfort level of a patient is high, and simultaneously, the distraction and lifting amplitude of the centrum is controlled through a quantifiable operation mode, the centrum correction amount is not easy to be too small or excessive, the accuracy of restoring the pathological centrum is greatly improved, and the operability and the stability of the whole device are stronger.

Description

Quantifiable distraction lifting device for lumbar spondylolisthesis reduction

Technical Field

The invention relates to the field of orthopedic medical instruments, in particular to a quantifiable distraction lifting device for lumbar spondylolisthesis reduction.

Background

Lumbar spondylolisthesis is one of common lumbar degenerative diseases, symptoms such as lumbocrural pain and the like are caused frequently, the life quality of a patient is influenced, and patients who are not treated by conservative treatment need to be treated by an operation.

Most students think that the normal sequence of the spine can be reconstructed by carrying out anatomical reduction on the lumbar spondylolisthesis in the operation, the unbalance of the sagittal plane of the spine is improved, the stability between vertebral bodies is increased, the fusion of operation segments is facilitated, the complications such as the formation of false joints and the failure of internal fixation are avoided, the spondylolisthesis is effectively prevented from being further aggravated, and the method has definite biomechanical advantages; the reduction is also beneficial to relieving spinal stenosis secondary to lumbar spondylolisthesis, the curative effect of the operation is improved, and the operation satisfaction of the patient is increased.

However, lumbar spondylolisthesis often merges pathological intervertebral space height and loses, so the operation is performed on the sagittal plane of the spondylolisthesis, the height of the pathological intervertebral space also needs to be recovered as much as possible, otherwise, the vertebral body is easily pulled up and blocked, pathological changes between the vertebral bodies are further aggravated, great pain is brought to a patient, meanwhile, the vertebral bodies are pulled and unfolded by hands at present, the operation is mainly performed by a simple appliance, the amplitude is not easily controlled by the mode of pulling and unfolding the vertebral bodies by hands, the vertebral body correction amount is too small or excessive, the operation precision is low, the stability is low, how to unfold the vertebral bodies in the operation and pull the vertebral body operation, the intervertebral space height is successfully recovered, and then the spondylolisthesis is reset, and the operation becomes a hotspot and difficulty in clinical discussion at present.

Disclosure of Invention

The invention aims to provide a quantifiable distraction lifting device for lumbar spondylolisthesis reduction, which overcomes the defects of the prior art, solves the problems that the lumbar spondylolisthesis of a patient is often combined with pathological changes, intervertebral space height is lost, vertebral body lifting in an operation is easy to be blocked, pathological changes between vertebral bodies are further aggravated, and great pain is brought to the patient, and simultaneously solves the problems that the amplitude of the existing manual vertebral body distraction lifting is difficult to control, the vertebral body correction amount is easy to be over-small or over-large, the operation precision is low, and the stability is low.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a can quantify and strut lifting device for lumbar vertebrae slippage resets, includes vertical last pole, and its top left side integral type is connected with horizontally scale and bottom and rotates through the universal joint shaft coupling and is connected with sleeve A, the scale top is equipped with sawtooth and the scale along its length direction and goes up horizontal sliding connection and have centrum deviation correcting device, struts, carries through centrum deviation correcting device to pathological change centrum position to the pathological change centrum position resets.

Further, the vertebral body deviation rectifying device comprises a spiral expanding device and a screw lifting device, the spiral expanding device comprises an inverted L-shaped support, a knob, a gear, a pin shaft M and a fixer, the inverted L-shaped support is formed by integrally connecting a vertical rod and a transverse base, the transverse base is a square box body with a left opening and a right opening, and the graduated scale penetrates through the box body from right to left;

the rear end face of the knob is integrally connected with a rotary rod, the rotary rod penetrates through the left side of the box body from front to back, the rear end of the rotary rod is locked through a screw, a gear is sleeved on the rotary rod positioned in the box body, and the gear is meshed with the sawteeth;

the fixer is vertically and rotatably connected to the two sides of the front side of the upper right part of the box body through a pin shaft M;

the screw is carried and is drawn the device and include sleeve B, connecting axle, carry and draw the stick, the montant bottom is rotated through the universal joint shaft coupling and is connected in sleeve B top, it has two vertical bar spouts to run through relatively on the lateral wall around sleeve B first, and sleeve B endotheca has the connecting axle, and it has the through-hole to run through around the connecting axle upper end, carry and draw the stick to run through in the bar spout and pass the through-hole and inject the connecting axle in sleeve B.

Further, the fixer is formed by connecting the arc, the front and back symmetrical two otic placodes integral type, round pin axle M runs through in two otic placodes, box body, inject the fixer in box body upper right portion, and the arc is connected in both sides around the upper right portion of box body through the vertical rotation of round pin axle M promptly, the right-hand member portion of arc just matches the sawtooth groove between the sawtooth.

Furthermore, a torsion spring is sleeved on the pin shaft M inside the box body, the right end part of the arc-shaped plate is clamped into the sawtooth groove under the elastic action of the torsion spring in a natural state, and when the mobile vertebral body deviation correcting device needs to be adjusted, the left end part of the arc-shaped plate is pressed downwards, so that the right end part of the arc-shaped plate is separated from the sawtooth groove.

Furthermore, the knob is vertically and rotatably connected with a handle in a shape like a Chinese character 'ao' through a pin shaft N, namely the pin shaft N sequentially penetrates through the left side of the handle, the knob and the right side of the handle from left to right.

Furthermore, the outer side wall of the notch of the strip-shaped sliding groove is provided with scale marks.

Furthermore, the outer side wall of the lower end part of the connecting shaft is provided with threads, the threads are just connected to a screw seat on the universal pedicle screw, the center of the bottom of the connecting shaft is downwards provided with a limiting bulge, and the limiting bulge is matched with a clamping groove at the top of the upper screw rod of the universal pedicle screw.

Furthermore, two groups of circular bulges which are bilaterally symmetrical are arranged on the inner side wall of the bottom of the sleeve A from top to bottom, the central connecting line of each group of circular bulges is intersected with the central line of the sleeve A, and when the sleeve A is sleeved on a universal pedicle screw driven into a vertebral body, the circular bulges are just clamped in the hole grooves which are matched with the universal pedicle screw.

Furthermore, the pathological change vertebral body part is a fourth vertebral body, a fifth vertebral body and a space between the fourth vertebral body and the fifth vertebral body, the fourth vertebral body and the fifth vertebral body are both embedded with a universal pedicle screw, and the two universal pedicle screws are positioned on the same side of the lumbar vertebral column and are in the same vertical row.

Compared with the prior art, the invention has the beneficial effects that:

according to the quantifiable distraction lifting device for lumbar spondylolisthesis reduction, the horizontal graduated scale is integrally connected to the left side of the top end of the upper support rod, so that the amplitude of vertebral body distraction of the vertebral body deviation rectifying device can be accurately controlled, collision between diseased vertebral bodies is avoided, and the reduction accuracy is improved.

The invention provides a quantifiable distraction lifting device for lumbar spondylolisthesis reduction, wherein a rotary rod is integrally connected to the rear end face of a knob, the rotary rod penetrates through the left side of a box body from front to back, the rear end of the rotary rod is locked through a screw, a gear is sleeved on the rotary rod positioned in the box body and meshed with saw teeth, and the centrum deviation correction device is finely adjusted by twisting the knob, so that the amplitude of distraction centrums is conveniently controlled, collision between diseased centrums is avoided, and the reduction accuracy is further improved.

The bottom of the vertical rod is rotatably connected to the top of the sleeve B through the universal joint coupler, so that the sleeve B is better butted with a screw seat of a universal pedicle screw, and the device is flexible.

The invention further provides a quantificationally unfolding lifting device for lumbar spondylolisthesis restoration, wherein a torsion spring is sleeved on a pin shaft M positioned in a box body, the right end part of an arc plate is clamped into a sawtooth groove under the elastic action of the torsion spring in a natural state, and when the quantificationally unfolding lifting device is used, the left end part of the arc plate is pressed downwards, so that the right end part of the arc plate is separated from the sawtooth groove, the purpose of adjusting the position of the movable vertebral body correcting device in time is realized, and the requirements of unfolding and lifting vertebral bodies are met.

The knob is vertically and rotatably connected with a concave-shaped handle through a pin shaft N, namely the pin shaft N sequentially penetrates through the left side of the handle, the knob and the right side of the handle from left to right, the pre-estimated distance of the pathological change vertebral body before the operation can be greatly adjusted through the concave-shaped handle, and the device is high in speed and efficiency.

Sixth, the quantifiable distraction lifting device for lumbar spondylolisthesis reduction provided by the invention has the advantages that the scale marks are arranged on the outer side wall of the notch of the strip-shaped chute, so that the amplitude of lifting the vertebral body by the lifting rod can be conveniently controlled, and the reduction accuracy is improved.

The invention further provides a quantifiable distraction lifting device for lumbar spondylolisthesis reduction, wherein threads are arranged on the outer side wall of the lower end part of the connecting shaft, the center of the bottom of the connecting shaft is downwards provided with a limiting bulge, and when the lower end part of the connecting shaft is in threaded connection with a screw seat on a universal pedicle screw, the limiting bulge is just embedded into a clamping groove in the top of a screw on the universal pedicle screw, so that the screw seat does not rotate any more, and the operation stability is improved.

Eighthly, when the sleeve A is sleeved on a universal pedicle screw driven into a vertebral body, the circular bulges are just clamped in hole grooves matched with the universal pedicle screw, namely the positions of the sleeve A and an upper support rod are limited, so that the subsequent vertebral body correcting device can be conveniently unfolded and pulled to operate.

The invention provides a quantified distraction lifting device for lumbar spondylolisthesis reduction, wherein a universal pedicle screw is embedded in each of a fourth vertebral body and a fifth vertebral body, and the two universal pedicle screws are positioned on the same side of a lumbar vertebral column and are in the same vertical row, so that the device is convenient to mount and follow-up vertebral body distraction and lifting operations.

The quantifiable distraction lifting device for lumbar spondylolisthesis reduction provided by the invention changes the traditional mode of lifting the reduction vertebral body by hands, adopts the distraction lifting device, completes distraction and lifting operations of the vertebral body in the operation simultaneously, simultaneously the vertebral body is lifted and lifted without obstruction due to distraction, avoids aggravating pathological changes between the vertebral bodies, greatly reduces pain feeling, has high comfort level for patients, controls the amplitude of distraction and lifting of the vertebral body through the quantifiable operation mode, is not easy to cause over-small or excessive correction amount of the vertebral body, greatly improves the precision of spondylolisthesis reduction of pathological changes, has stronger operability and stability of the whole device, further reduces the operation time of doctors, and has extremely high application and popularization values.

Drawings

Fig. 1 is a front view of the overall structure of the present invention.

Fig. 2 is a side longitudinal sectional view of the overall structure of the present invention.

Fig. 3 is a perspective view of the screw expanding device of the present invention.

Fig. 4 is a structural sectional view of a sleeve B of the present invention.

Fig. 5 is a structural view of the universal joint coupling of the present invention.

Fig. 6 is a structural view of a diseased vertebral body part of a human body according to the present invention.

FIG. 7 is a schematic view of a prior art universal pedicle screw of the invention.

Fig. 8 is a diagram of a clinical embodiment of the present invention, and fig. 8 is an operating table, on which a human body lies.

Detailed Description

The present invention is further illustrated by the following detailed description in conjunction with the accompanying drawings, it being understood that the following detailed description is illustrative of the invention only and is not intended to limit the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which will occur to those skilled in the art upon reading the present specification.

Example 1: a quantifiable distraction device for reduction of lumbar spondylolisthesis as shown in fig. 1 to 8, which is characterized in that: the device comprises a vertical upper support rod 1, wherein the left side of the top end of the vertical upper support rod is integrally connected with a horizontal graduated scale 2, the bottom of the vertical upper support rod is rotatably connected with a sleeve A4 through a universal joint coupler 3, sawteeth 21 are arranged at the top of the graduated scale 2 along the length direction of the graduated scale, a vertebral body deviation rectifying device 5 is horizontally connected onto the graduated scale 2 in a sliding manner, and a diseased vertebral body part 6 is supported and lifted through the vertebral body deviation rectifying device 5 and is reset; the vertebral body deviation correcting device 5 comprises a spiral expanding device 51 and a screw lifting device 52, the spiral expanding device 51 comprises an inverted L-shaped support 511, a knob 512, a gear 513, a pin M514 and a fixer 515, the inverted L-shaped support 511 is formed by integrally connecting a vertical rod 501 and a transverse base 502, the transverse base 502 is a square box body with a left opening and a right opening, and the scale 2 penetrates through the box body from right to left; a rotary rod 516 is integrally connected to the rear end face of the knob 512, the rotary rod 516 penetrates through the left side of the box body from front to back, the rear end of the rotary rod 516 is locked through a screw 508, a gear 513 is sleeved on the rotary rod 516 positioned in the box body, and the gear 513 is meshed with the saw teeth 21;

the fixer 515 is vertically and rotatably connected to the two sides of the front side of the upper right part of the box body through a pin shaft M514; the screw lifting device 52 comprises a sleeve B521, a connecting shaft 522 and a lifting rod 523, the bottom of the vertical rod 501 is rotatably connected to the top of the sleeve B521 through a universal joint coupler 3, two vertical strip-shaped sliding grooves 524 are relatively penetrated through the front and rear side walls of the upper half part of the sleeve B521, the connecting shaft 522 is sleeved in the sleeve B521, a through hole 525 is penetrated through the front and rear upper ends of the connecting shaft 522, and the lifting rod 523 penetrates through the strip-shaped sliding grooves 524 and penetrates through the through hole 525 to limit the connecting shaft 522 in the sleeve B521; fixer 515 is formed by connecting arc 503, the symmetrical two otic placodes 504 integral type of front and back, round pin axle M514 runs through in two otic placodes 504, box body, inject fixer 515 in the upper right portion of box body, and arc 503 passes through the vertical rotation of round pin axle M514 and connects both sides around the upper right portion of box body promptly, arc 503 right-hand member portion just matches the sawtooth groove between sawtooth 21.

A torsion spring 505 is sleeved on a pin shaft M514 in the box body, under the natural state, the right end part of the arc-shaped plate 503 is clamped into the sawtooth groove under the elastic action of the torsion spring 505, and when the movable vertebral body deviation rectifying device 5 needs to be adjusted, the left end part of the arc-shaped plate 503 is pressed downwards, so that the right end part of the arc-shaped plate 503 is separated from the sawtooth groove.

The knob 512 is vertically and rotatably connected with a concave-shaped handle 518 through a pin shaft N517, namely the pin shaft N517 sequentially penetrates through the left side of the handle 518, the knob 512 and the right side of the handle 518 from left to right; the outer side wall of the notch of the bar-shaped chute 524 is provided with a scale mark 526; the outer side wall of the lower end of the connecting shaft 522 is provided with threads, the threads are just connected to the screw seat 506 on the universal pedicle screw, the center of the bottom of the connecting shaft 522 is downwards provided with a limiting protrusion 527, and the limiting protrusion 527 is matched with the clamping groove 71 at the top of the screw rod on the universal pedicle screw 7.

The inner side wall of the bottom of the sleeve A4 is provided with two groups of circular bulges 41 which are bilaterally symmetrical from top to bottom, the central connecting line of each group of circular bulges 41 is intersected with the central line of the sleeve A4, and when the sleeve A4 is sleeved on the universal pedicle screw 7 driven into the vertebral body, the circular bulges 41 are just clamped in the hole grooves 72 matched with the universal pedicle screw 7; the pathological vertebral body part 6 is a fourth vertebral body 61, a fifth vertebral body 62 and between the fourth vertebral body 61 and the fifth vertebral body 62, a universal pedicle screw 7 is embedded in each of the fourth vertebral body 61 and the fifth vertebral body 62, and the two universal pedicle screws 7 are positioned on the same side of the lumbar vertebral column and are in the same vertical row.

The working principle of the invention is as follows:

firstly, determining the distance of a diseased intervertebral space to be expanded and the degree of the spondylolisthesis to be pulled by measuring in an imaging (X-ray or CT) manner before an operation;

after anesthesia, disinfection and towel spreading, taking a posterior median incision of a fourth vertebral body 61 and a fifth vertebral body 62 of the lumbar vertebra, sequentially incising skin and subcutaneous tissues, incising a lumbar dorsal fascia along two sides of a spinous process, pushing sacrospinous muscles away from bottom to top, and exposing facet joints on two sides of the fourth vertebral body 61 and the fifth vertebral body 62;

thirdly, appropriate pedicle screws 7 are respectively placed in pedicles on two sides of the fourth vertebral body 61 and the fifth vertebral body 62, vertebral plates on two sides of the fourth vertebral body 61 are excised, hyperplastic articular processes and yellow ligaments are excised, longitudinal ligaments are cut after a gap between the fourth vertebral body 61 and the fifth vertebral body 62 is cut, narrow intervertebral space is detected, and intervertebral discs are gradually taken out;

estimating the distance between joints of the fourth vertebral body 61 and the fifth vertebral body 62 according to the image, pressing the fixator 515, opening the vertebral body rectification device 5 to the estimated distance by the adjusting knob 512, loosening the fixator 515, and fixing the position of the vertebral body rectification device 5;

fifthly, the connecting shaft 522 and the pedicle screw 7 are assembled by using a screwdriver, and when the lower end part of the connecting shaft 522 is in threaded connection with the screw seat 506 on the universal pedicle screw 7, the limiting protrusion 527 is just embedded into the clamping groove 71 at the top of the screw rod on the universal pedicle screw 7, so that the screw seat 506 does not rotate any more, and the operation stability is improved;

sixthly, adjusting the universal joint coupler 3 according to the actual position of the joint of the fourth vertebral body 61 to enable the end of the sleeve B521 connected with the universal joint coupler 3 to be accurately aligned with the joint of the fourth vertebral body 61, enabling the sleeve B521 to be sleeved on the connecting shaft 522, and then rotating the sleeve B521 to enable the two ends of the through hole 525 to be respectively aligned with the strip-shaped sliding grooves 524 and enabling the axis of the inner hole of the through hole 525 to be approximately parallel to the lumbar vertebra connecting line;

seventhly, adjusting the universal joint coupler 3 according to the actual position of the joint of the fifth vertebral body 62 to enable the end of the sleeve A4 connected with the universal joint coupler to be accurately aligned with the joint of the fifth vertebral body 62, and assembling the circular protrusion 41 inside the sleeve A4 with the hole groove 71 to enable the circular protrusion 41 to be just clamped into the hole groove 71;

eighthly, the pulling rod 523 is installed in the through hole 525 of the connecting shaft 522, then the fixator 515 of the screw adjusting device is opened, the knob 512 is adjusted according to the preset expansion distance, the intervertebral space between the fourth vertebral body 61 and the fifth vertebral body 62 is expanded, and then the fixator 515 is closed;

and ninthly, pulling up the pulling rod 523 to pull the fourth vertebral body 61 to a preset position to realize the reduction of the fourth vertebral body 61, and verifying the effects of distraction and pulling through perspective until the effect is satisfied.

Installing a connecting rod on the other side and screwing a pedicle screw nut, implanting a proper amount of autogenous bone and a fusion device with a proper size into the intervertebral space between the fourth vertebral body 61 and the fifth vertebral body 62, after removing the device, installing the connecting rod on the same side and screwing the pedicle screw nut, and observing the position to be satisfied through perspective again.

And (4) performing subsequent operation as usual, placing and draining the incision and suturing layer by layer to finally realize the restoration of the intervertebral space height and the restoration of the slipped vertebral body.

When the vertebral body deviation rectifying device 5 is installed, the lifting rod 523 is in clearance fit with the connecting shaft 522, the installation precision requirement is not too high, the test shows that the axis of the inner hole of the lifting rod 523 is only approximately parallel to the lumbar vertebra connecting line, and then the lifting rod 523 is installed in the through hole 525.

Wherein, the universal joint coupler 3 adopts a single-joint-universal joint coupler with the model of CPW-5.

Example 2: the upper end of the universal joint coupler 3 connected with the sleeve B521 is fixed, so that the universal joint coupler cannot rotate, only the sleeve B521 at the lower end is left to vertically rotate front and back, the degree of freedom is reduced, the assembly of the sleeve A4 and the universal pedicle screw 7 is prevented from being interfered, the specification of the sleeve A4 is the same as that of the sleeve B521, and the whole system is more harmonious.

Claims (9)

1. The utility model provides a can quantify and strut pulling apparatus for lumbar spondylolisthesis resets which characterized in that: including vertical last branch (1), its top left side integral type is connected with horizontally scale (2) and the bottom rotates through universal joint shaft coupling (3) and is connected with sleeve A (4), horizontal sliding connection has centrum deviation correcting device (5) on scale (2) top is equipped with sawtooth (21) and scale (2) along its length direction, struts, carries through centrum deviation correcting device (5) to pathological change centrum position (6), and resets pathological change centrum position (6).

2. The quantifiable distraction device of claim 1 for reduction of lumbar spondylolisthesis, wherein: the vertebral body deviation correcting device (5) comprises a spiral expanding device (51) and a screw lifting device (52), the spiral expanding device (51) comprises an inverted L-shaped support (511), a knob (512), a gear (513), a pin shaft M (514) and a fixer (515), the inverted L-shaped support (511) is formed by integrally connecting a vertical rod (501) and a transverse base (502), the transverse base (502) is a square box body with a left opening and a right opening, and the graduated scale (2) penetrates through the box body from right to left;

the rear end face of the knob (512) is integrally connected with a rotating rod (516), the rotating rod (516) penetrates through the left side of the box body from front to back, the rear end of the rotating rod (516) is locked through a screw (508), a gear (513) is sleeved on the rotating rod (516) positioned in the box body, and the gear (513) is meshed with the saw teeth (21);

the fixer (515) is vertically and rotatably connected to the two sides of the front side of the upper right part of the box body through a pin shaft M (514);

screw is carried and is drawn device (52) including sleeve B (521), connecting axle (522), is carried and draws stick (523), montant (501) bottom is passed through universal joint shaft coupling (3) and is rotated and connect in sleeve B (521) top, it has two vertical bar spouts (524) to run through relatively on the lateral wall around sleeve B (521) first, and sleeve B (521) endotheca has connecting axle (522), and it has through-hole (525) to run through around connecting axle (522) upper end, it runs through in bar spout (524) and passes through-hole (525) and injects connecting axle (522) in sleeve B (521) to carry and draw stick (523).

3. The quantifiable distraction device of claim 2 for reduction of lumbar spondylolisthesis, wherein: fixer (515) are connected by two otic placodes (504) integral types of arc (503), front and back symmetry and form, round pin axle M (514) runs through in two otic placodes (504), box body, inject fixer (515) in the upper right portion of box body, and both sides around the arc (503) are connected in the upper right portion of box body through the vertical rotation of round pin axle M (514) promptly, arc (503) right-hand member portion just matches the sawtooth groove between sawtooth (21).

4. A quantifiable distraction device for reduction of lumbar spondylolisthesis according to claim 2 or 3, further comprising: a torsion spring (505) is sleeved on a pin shaft M (514) in the box body, under a natural state, the right end portion of the arc-shaped plate (503) is clamped into the sawtooth groove under the elastic action of the torsion spring (505), and when the mobile vertebral body deviation rectifying device (5) needs to be adjusted, the left end portion of the arc-shaped plate (503) is pressed downwards, so that the right end portion of the arc-shaped plate (503) is separated from the sawtooth groove.

5. The quantifiable distraction device of claim 2 for reduction of lumbar spondylolisthesis, wherein: the knob (512) is vertically and rotatably connected with a concave handle (518) through a pin shaft N (517), namely the pin shaft N (517) sequentially penetrates through the left side of the handle (518), the knob (512) and the right side of the handle (518) from left to right.

6. The quantifiable distraction device of claim 2 for reduction of lumbar spondylolisthesis, wherein: and the outer side wall of the notch of the strip-shaped sliding groove (524) is provided with scale marks (526).

7. The quantifiable distraction device of claim 2 for reduction of lumbar spondylolisthesis, wherein: the outer side wall of the lower end of the connecting shaft (522) is provided with threads, the threads are just connected to a screw seat (506) on the universal pedicle screw, the center of the bottom of the connecting shaft (522) is downwards provided with a limiting bulge (527), and the limiting bulge (527) is matched with a clamping groove (71) at the top of a screw rod on the universal pedicle screw (7).

8. The quantifiable distraction device of claim 2 for reduction of lumbar spondylolisthesis, wherein: two sets of circular bulges (41) of bilateral symmetry are arranged on the inner side wall of the bottom of the sleeve A (4) from top to bottom, the central connecting line of each set of circular bulges (41) is intersected with the central line of the sleeve A (4), and when the sleeve A (4) is sleeved on a universal pedicle screw (7) driven into a vertebral body, the circular bulges (41) are just clamped in hole grooves (72) matched with the universal pedicle screw (7).

9. The quantifiable distraction device of claim 1 for reduction of lumbar spondylolisthesis, wherein: the pathological change vertebral body part (6) is a fourth vertebral body (61), a fifth vertebral body (62) and between the fourth vertebral body and the fifth vertebral body, the fourth vertebral body (61) and the fifth vertebral body (62) are both embedded with a universal pedicle screw (7), and the two universal pedicle screws (7) are positioned on the same side and the same vertical line of the lumbar vertebral column.

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