CN212415879U - Quantifiable distraction lifting device for lumbar spondylolisthesis reduction - Google Patents

Abstract

The utility model discloses a can quantify and strut draw gear for lumbar vertebrae slippage resets, including vertical last pole of going up, its top left side integral type is connected with horizontally scale and bottom and rotates through universal joint coupler and is connected with sleeve A, the scale top is equipped with on sawtooth and the scale horizontal sliding connection and has centrum deviation correcting device along its length direction, struts, carries through centrum deviation correcting device to pathological change slippage centrum position resets. By the utility model discloses the structure can be known, changes the bare-handed mode of carrying the centrum that resets of tradition, adopts to strut to carry and draws the device, and the centrum struts and carries and draws the back in the art, can effectively improve the slippage pathological change between the centrum, and patient's comfort level is high, simultaneously through the operating means that can quantify, controls the centrum and struts and carry the range of drawing, is difficult for leading to centrum correction amount undersize or excessive, has greatly improved the accuracy that the pathological change centrum resets, and the maneuverability and the stability of whole device are stronger.

Description

Quantifiable distraction lifting device for lumbar spondylolisthesis reduction

Technical Field

The utility model belongs to the technical field of orthopedics medical instrument and specifically relates to a can quantify and strut pulling device for lumbar vertebrae slippage resets.

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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can quantify and strut pulling device for lumbar vertebrae slippage resets, overcome prior art's defect, it has pathological change intervertebral space height to lose to solve patient's lumbar vertebrae slippage and often close, it is obstructed easily to cause the art centrum to carry, pathological change between the centrum further aggravates, bring huge painful problem for the patient, solve simultaneously that present bare-handed carrying is pulled the range of strutting the centrum and is difficult to control, easily lead to centrum correction amount undersize or excessive, the operation precision is low, the problem of stability low.

In order to achieve the above purpose, the utility model 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 beneficial effects of the utility model are that:

one, the utility model provides a pair of a can quantify and strut lifting device for lumbar vertebrae slippage resets goes up support rod top left side integral type and is connected with the horizontally scale, and the range of the centrum is propped open to accurate control centrum deviation correcting device of being convenient for, avoids the collision between the pathological change centrum, improves the precision that resets.

Two, the utility model provides a pair of a can quantify and strut pulling device for lumbar vertebrae slippage resets, the integral type is connected with the swing arm on the knob rear end face, the swing arm runs through in box body left side and back end through the screw locking after by preceding to, it is equipped with the gear to be located the cover on the inside swing arm of box body, gear and sawtooth meshing, finely tune centrum deviation correcting device through twisting the knob, the range of the centrum is propped open in the control of being convenient for, avoid the collision between the pathological change centrum, further improve the precision that resets.

Three, the utility model provides a pair of a can quantify and strut lifting device for lumbar vertebrae slippage resets, the montant bottom is rotated through the universal joint shaft coupling and is connected in sleeve B top for sleeve B better dock mutually with the screw seat of universal pedicle of vertebral arch screw, more nimble.

Four, the utility model provides a pair of a can quantify and strut pulling device for lumbar vertebrae slippage resets is located the cover and is equipped with torque spring on the round pin axle M of box body inside, and under the natural state, during torque spring elastic action made the arc right-hand member card advance the sawtooth groove, during the use, downwards pressed arc left end portion for arc right-hand member portion breaks away from the sawtooth groove, realizes adjusting the purpose that removes centrum deviation correcting device's position in good time, satisfies and struts, carries the requirement of pulling the centrum.

Five, the utility model provides a pair of a can quantify and strut lifting device for lumbar vertebrae slippage resets is connected with "character cut in bas-relief" handle through the vertical rotation of round pin axle N on the knob, and round pin axle N runs through in handle left side, knob, handle right side from left to right in proper order promptly, can adjust the distance of estimating of pathological change centrum before the art through "character cut in bas-relief" handle by a wide margin, and is fast, efficient.

Six, the utility model provides a pair of a can quantify and strut pulling device for lumbar vertebrae slippage resets is equipped with the scale mark on the bar spout notch lateral wall, is convenient for control to carry and draws the stick to lift the range of centrum, improves the accurate nature that resets.

Seventhly, the utility model provides a pair of a can quantify and strut lifting device for lumbar vertebrae slippage resets is equipped with the screw thread on the tip lateral wall under the connecting axle, and connecting axle bottom center is equipped with spacing arch downwards, and when the tip under the connecting axle during with the screw base threaded connection on the universal pedicle of vertebral arch screw, spacing arch just imbeds in the draw-in groove at universal pedicle of vertebral arch screw top for the screw base no longer takes place to rotate, improves operating stability.

Eight, the utility model provides a pair of a can quantify and strut pulling device for lumbar vertebrae slippage resets, sleeve A bottom inside wall is equipped with bilateral symmetry's two sets of circular archs from top to bottom, the circular bellied central line of every group intersects with sleeve A central line, when sleeve A cover is on the universal pedicle of vertebral arch screw of squeezing into on the centrum, circular arch just blocks on universal pedicle of vertebral arch screw with it assorted hole inslot, sleeve A and the position of last branch are injectd promptly, be convenient for follow-up centrum deviation correcting device strut, carry and pull the centrum operation.

Nine, the utility model provides a pair of a can quantify to strut lifting device for lumbar vertebrae slippage resets all inlays on fourth centrum, the fifth centrum that an universal pedicle screw and two universal pedicle screw lie in homonymy, the same erector of lumbar vertebrae post, and the installation and subsequent centrum of this device of being convenient for strut, carry and draw the operation.

Ten, the utility model provides a pair of a can quantify and strut lifting device for lumbar vertebrae slippage resets, change the bare-handed mode that pulls the centrum that resets of tradition, adopt to strut and pull the device, accomplish strutting and pulling the operation of centrum in the art simultaneously, the centrum is because of strutting and carry and not hinder simultaneously, avoid aggravating the pathological change between the centrum, painful sense reduces substantially, patient's comfort level is high, simultaneously through the operation mode that can quantify, control centrum struts and carries the range of carrying, be difficult for leading to centrum correction amount undersize or excessive, the precision degree that pathological change slippage centrum resets has greatly been improved, and whole device maneuverability and stability are stronger, and then reduce doctor's operating time, high application and popularization value has.

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 three-dimensional structure view of the spiral distraction device of the present invention.

Fig. 4 is a structural sectional view of the 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 diagram of the pathological vertebral body part of the human body of the utility model.

Fig. 7 is a schematic structural view of the universal pedicle screw of the prior art.

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 prone.

Detailed Description

The present invention will be further clarified by the following detailed description, which is to be understood as being given by way of illustration only, and not by way of limitation, of the scope of the invention, which, after reading the present invention, is intended to fall within the scope of the appended claims, as modified by those skilled in the art in various equivalent forms.

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 utility model 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.

The utility model discloses a when centrum deviation correcting device 5 installed, because carry and draw stick 523 and connecting axle 522 for clearance fit, the installation accuracy requirement is not too high, through the test only need carry draw the hole axis of stick 523 with the lumbar vertebrae connecting wire roughly can, will carry again and draw stick 523 to pack into 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.

Images