Spinal surgery expander

Abstract

The present invention relates to the technical field of medical equipment, and in particular to a spreader for spinal surgery. A spreader for spinal surgery comprises a supporting arm and two spreader mechanisms, the supporting arm comprises two first hinged rods, and each spreader mechanism comprises a pedestal and a rotating plate. In the initial state, the rotating plate is in a first state. The front ends of the two first hinged rods are placed between two adjacent vertebrae, and the front ends of the two first hinged rods are gradually moved away from each other. The pedestal and the rotating plate drive the two adjacent vertebrae to move away from each other. At the same time, since the rotating plate and the pedestal are rotatably connected, the rotating plate and the vertebrae are kept close and parallel, and can adapt to the inclination of the vertebrae, thereby increasing the contact area between the rotating plate and the vertebrae and preventing damage to the vertebrae. The present invention provides a spreader for spinal surgery to solve the problem that the existing spreader device is prone to damage to the vertebrae during use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a spreader for spinal surgery. Background Art

[0002] Spinal surgery is a surgical procedure used to treat spinal diseases. In spinal surgery, a spreader is a commonly used instrument used to expand the space between the intervertebral discs. It can help doctors better observe and treat spinal problems such as herniated discs and scoliosis. The use of a spreader can make the surgical area more accessible and also help reduce damage to surrounding tissues. Spinal endoscope systems, gun-shaped bone forceps, electric drills, C-arms or G-arms are also commonly used instruments in spinal surgery. The combination of these instruments can provide more comprehensive and precise surgical operations. In short, the use of spreaders in spinal surgery is to increase the width of the intervertebral disc space for surgical operations.

[0003] During spinal surgery, a spacer is first used to expand the space between the vertebrae, and then an intervertebral fusion cage is placed into the space. An intervertebral fusion cage is a medical device used in spinal surgery, mainly used to promote fusion between vertebrae. During spinal surgery, an intervertebral fusion cage is implanted between vertebrae to provide additional stability and support. It is usually made of metal, ceramic or biomaterials and has good biocompatibility and mechanical properties.

[0004] For example, the patent with announcement number CN107582112A provides an intervertebral distraction device, which can accurately observe the distraction force at any time by setting two distraction arms, a distraction locker and a force plate. However, during the distraction process, when the two distraction arms come into contact with the vertebral body, the contact area between the distraction arms and the vertebral body is small because the vertebral body is tilted by force, which leads to a large pressure on the vertebral body, which is easy to cause damage to the vertebral body. Summary of the invention

[0005] The invention provides a spinal surgery expander to solve the problem that the existing expander easily causes damage to the vertebral body during use.

[0006] The invention discloses a spinal surgery spreader that adopts the following technical solution: a spinal surgery spreader includes a support arm and two spreading mechanisms. The support arm includes two first hinged rods, the middle parts of the two first hinged rods are hinged to each other, and the two ends of each first hinged rod are respectively a front end and a rear end.

[0007] Each spreading mechanism includes a pedestal and a rotating plate. Each pedestal is detachably disposed on the front end of a first hinge rod, and the rotating plate is rotatably disposed on the pedestal. The spine includes a plurality of vertebrae, and the two rotating plates are used to be inserted between two adjacent vertebrae, and each rotating plate is against one vertebrae. The rotating plate has a first state and a second state, and the first state of the rotating plate is that each rotating plate is parallel to the axis of symmetry of the two first hinge rods, and along the direction from the front end to the rear end of the first hinge rod, the two sides of the rotating plate are the first side and the second side respectively. The second state of the rotating plate is that each rotating plate is tilted, and along the direction from the first side to the second side of the rotating plate, the two rotating plates gradually move away from each other.

[0008] Furthermore, each pedestal is provided with a first slide groove, which is arranged along the direction from the front end to the rear end of the first hinge rod where each pedestal is located. The symmetry axis of the two first hinge rods is the first direction, and each rotating plate is provided with a second slide groove, which is arranged along the first direction when the rotating plate is in the first state.

[0009] Each opening mechanism further includes a connecting rod, each connecting rod is arranged on a pedestal, and each connecting rod is arranged along the direction from the front end to the rear end of the first hinged rod where each pedestal is located, a first slider is fixedly arranged at one end of the connecting rod, and the first slider is slidably arranged in the first slide groove. A second slider is rotatably arranged at the other end of the connecting rod, and the second slider is slidably arranged in the second slide groove.

[0010] Furthermore, the first slider is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are sequentially distributed along the direction from the rear end to the front end of the first hinge rod. And along the direction from the rear end to the front end of the first hinge rod, the first inclined surface gradually moves away from the pedestal, and the second inclined surface gradually approaches the pedestal.

[0011] Furthermore, a rotating shaft is fixedly arranged on the pedestal, and the rotating shaft is arranged along a second direction, and the second direction is perpendicular to the first direction. The middle part of the rotating plate is rotatably connected to the rotating shaft, and the rotating plate rotates around the rotating shaft, so that the first sides of the two rotating plates are close to each other.

[0012] Furthermore, limit rings are fixedly provided at both ends of each rotating shaft, and the rotating plate is located between the two limit rings on each rotating shaft.

[0013] Furthermore, the second slide groove is provided with a third slide groove on two side walls perpendicular to the first direction, the third slide groove is arranged along the first direction, and the third slide groove is connected to the first slide groove. A hinge shaft is arranged at the rotation connection between the connecting rod and the second slider, the hinge shaft is arranged along the second direction, and both ends of the hinge shaft are slidably arranged in the two third slide grooves.

[0014] Furthermore, a through hole is provided at the front end of each first hinge rod, the through hole is arranged along the second direction, a groove is provided at one end of the through hole, and the groove is connected to the through hole. A limiting column is fixedly provided on each pedestal, one end of each limiting column is arranged in a through hole, and a baffle is fixedly provided at the other end of each limiting column, and the baffle is arranged in the groove.

[0015] Furthermore, a spinal surgery spreader also includes a supporting arm, which includes two second hinged rods, each of which includes a straight rod and an oblique rod. One end of the straight rod is rotatably connected to the rear end of the first hinged rod, and the other end of the straight rod is fixedly connected to the oblique rod. The connection between the straight rod and the oblique rod of one second hinged rod and the connection between the straight rod and the oblique rod of another second hinged rod are mutually hinged. Along the direction from the front end to the rear end of the first hinged rod, the two oblique rods gradually move away from each other.

[0016] Further, one of the inclined rods is fixedly provided with a ratchet bar, and the ratchet bar is arranged along the direction from one of the inclined rods to the other inclined rod. A clamping block is fixedly provided on the other inclined rod, and the clamping block and the ratchet bar abut against each other.

[0017] Furthermore, a spinal surgery spreader also includes two supporting springs, one end of each supporting spring is fixedly disposed on an inclined rod, and the other ends of the two supporting springs are in contact with each other.

[0018] The beneficial effects of the present invention are as follows: a spinal surgery spreader of the present invention is provided with a first hinge rod and a rotating plate, and in the initial state, the rotating plate is in the first state. Pick up the spinal surgery spreader, place the front ends of the two first hinge rods between two adjacent vertebrae, gradually move the front ends of the two first hinge rods away from each other, the two first hinge rods drive the two pedestals and the rotating plate away from each other, the pedestals and the rotating plate drive the two adjacent vertebrae away from each other, and at the same time, because the rotating plate and the pedestal are rotatably connected, the rotating plate and the vertebrae are kept close and parallel, and can adapt to the inclination of the vertebrae, thereby increasing the contact area between the rotating plate and the vertebrae, and preventing the vertebrae from being damaged by a large pressure due to the small contact area between the rotating plate and the vertebrae. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the structure of a spinal surgery distractor provided by an embodiment of the present invention;

[0021] Figure 2 An exploded view of a partial structure of a spinal surgery distractor provided by an embodiment of the present invention;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 A schematic diagram of a rotating plate of a spinal surgery distractor provided by an embodiment of the present invention in a first state;

[0024] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6 A schematic diagram of a rotating plate of a spinal surgery distractor provided by an embodiment of the present invention being in a second state;

[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 A schematic diagram of the partial structure of a spinal surgery distractor provided by an embodiment of the present invention.

[0028] In the figure: 100, supporting arm; 110, supporting spring piece; 120, ratchet bar; 121, block; 130, second hinge rod; 131, straight rod; 132, oblique rod; 200, supporting arm; 210, first hinge rod; 230, through hole; 231, groove; 310, limiting column; 320, baffle; 330, pedestal; 341, first slide groove; 350, rotating shaft; 360, rotating plate; 361, second slide groove; 370, first slider; 380, second slider; 390, limiting ring; 400, connecting rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Reference Figures 1 to 8 As shown, a spinal surgery spreader provided by an embodiment of the present invention includes a support arm 200 and two spreading mechanisms. The support arm 200 includes two first hinged rods 210, the middle parts of the two first hinged rods 210 are hinged to each other, and the two ends of each first hinged rod 210 are respectively a front end and a rear end.

[0031] Each spreading mechanism includes a pedestal 330 and a rotating plate 360. Each pedestal 330 is detachably disposed on the front end of a first hinge rod 210, and the rotating plate 360 ​​is rotatably disposed on the pedestal 330. The spine includes a plurality of vertebrae, and two rotating plates 360 are used to be inserted between two adjacent vertebrae, and each rotating plate 360 ​​is against one vertebrae. The rotating plate 360 ​​has a first state and a second state. The first state of the rotating plate 360 ​​is that each rotating plate 360 ​​is parallel to the axis of symmetry of the two first hinge rods 210, and along the direction from the front end to the rear end of the first hinge rod 210, the two sides of the rotating plate 360 ​​are the first side and the second side respectively. The second state of the rotating plate 360 ​​is that each rotating plate 360 ​​is tilted, and along the direction from the first side to the second side of the rotating plate 360, the two rotating plates 360 gradually move away from each other.

[0032] In the initial state, the rotating plate 360 ​​is in the first state. Pick up the spinal surgery spreader, place the front ends of the two first hinged rods 210 between two adjacent vertebrae, and gradually move the front ends of the two first hinged rods 210 away from each other. The two first hinged rods 210 drive the two pedestals 330 and the rotating plate 360 ​​away from each other, and the pedestals 330 and the rotating plate 360 ​​drive the two adjacent vertebrae away from each other. At the same time, since the rotating plate 360 ​​and the pedestal 330 are rotatably connected, the rotating plate 360 ​​and the vertebrae are kept close and parallel, which can adapt to the inclination of the vertebrae, thereby increasing the contact area between the rotating plate 360 ​​and the vertebrae, and preventing the vertebrae from being damaged by a large pressure due to the small contact area between the rotating plate 360 ​​and the vertebrae.

[0033] In this embodiment, each pedestal 330 is provided with a first slide groove 341, and the first slide groove 341 is arranged along the direction from the front end to the rear end of the first hinge rod 210 where each pedestal 330 is located. The symmetry axis of the two first hinge rods 210 is the first direction, and each rotating plate 360 ​​is provided with a second slide groove 361, and when the rotating plate 360 ​​is in the first state, the second slide groove 361 is arranged along the first direction.

[0034] Each opening mechanism further includes a connecting rod 400, each connecting rod 400 is disposed on a pedestal 330, and each connecting rod 400 is disposed along the direction from the front end to the rear end of the first hinge rod 210 where each pedestal 330 is located, and a first slider 370 is fixedly disposed at one end of the connecting rod 400, and the first slider 370 is slidably disposed in the first slide groove 341. A second slider 380 is rotatably disposed at the other end of the connecting rod 400, and the second slider 380 is slidably disposed in the second slide groove 361.

[0035] The first slider 370 is arranged so that when the intervertebral fusion device is located between the pedestals 330, the first slider 370 can abut against the intervertebral fusion device, and the intervertebral fusion device further pushes the two pedestals 330 away from each other, further increasing the space between the two vertebral bodies, thereby facilitating the intervertebral fusion device to enter between the two vertebral bodies and preventing the intervertebral fusion device from rubbing against the vertebral bodies.

[0036] Therefore, when the inclination of the vertebral body is greater, the deflection degree of the rotating plate 360 ​​is greater, and the inclination degree of the rotating plate 360 ​​is greater. When the rotating plate 360 ​​rotates, the rotating plate 360 ​​will push the connecting rod 400 to move toward the rear end of the first hinge rod 210. The connecting rod 400 drives the first slider 370 to slide in the first slide groove 341, and then drives the first slider 370 to move synchronously toward the rear end of the first hinge rod 210, so as to facilitate the contact between the intervertebral fusion device and the first slider 370, and the connecting rod 400 supports the rotating plate 360 ​​and the pedestal 330.

[0037] In this embodiment, the first slider 370 is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are sequentially distributed along the direction from the rear end to the front end of the first hinge rod 210. And along the direction from the rear end to the front end of the first hinge rod 210, the first inclined surface gradually moves away from the pedestal 330, and the second inclined surface gradually moves closer to the pedestal 330. The provision of the first inclined surface and the second inclined surface facilitates the intervertebral fusion cage to pass between the two pedestals 330.

[0038] In this embodiment, a rotating shaft 350 is fixedly disposed on the pedestal 330, and the rotating shaft 350 is disposed along a second direction, and the second direction is perpendicular to the first direction. The middle portion of the rotating plate 360 ​​is rotatably connected to the rotating shaft 350, and the rotating plate 360 ​​rotates around the rotating shaft 350, thereby making the first sides of the two rotating plates 360 approach each other.

[0039] In this embodiment, a limiting ring 390 is fixedly disposed at both ends of each rotating shaft 350, and the rotating plate 360 ​​is located between the two limiting rings 390 on each rotating shaft 350. The limiting ring 390 is used to prevent the rotating shaft 350 and the rotating plate 360 ​​from being separated.

[0040] In this embodiment, a third slide groove is respectively provided on two side walls of the second slide groove 361 perpendicular to the first direction, the third slide groove is arranged along the first direction, and the third slide groove is connected to the first slide groove 341. A hinge shaft is provided at the rotation connection between the connecting rod 400 and the second slider 380, the hinge shaft is arranged along the second direction, and both ends of the hinge shaft are slidably arranged in the two third slide grooves.

[0041] In this embodiment, a through hole 230 is formed at the front end of each first hinge rod 210, and the through hole 230 is arranged along the second direction. A groove 231 is formed at one end of the through hole 230, and the groove 231 is connected to the through hole 230. A limiting column 310 is fixedly provided on each pedestal 330, and one end of each limiting column 310 is arranged in a through hole 230. A baffle 320 is fixedly provided at the other end of each limiting column 310, and the baffle 320 is arranged in the groove 231 to prevent the limiting column 310 from rotating relative to the through hole 230. The pedestal 330 is detachably provided on the first hinge rod 210.

[0042] In this embodiment, a spinal surgery spreader further includes a supporting arm 100, which includes two second hinged rods 130, each of which includes a straight rod 131 and an oblique rod 132. One end of the straight rod 131 is rotatably connected to the rear end of the first hinged rod 210, and the other end of the straight rod 131 is fixedly connected to the oblique rod 132. The connection between the straight rod 131 and the oblique rod 132 of one second hinged rod 130 and the connection between the straight rod 131 and the oblique rod 132 of another second hinged rod 130 are hinged to each other. Along the direction from the front end to the rear end of the first hinged rod 210, the two oblique rods 132 gradually move away from each other.

[0043] The two oblique rods 132 are squeezed so as to approach each other, thereby driving the two straight rods 131 and one end connected to the first hinged rod 210 to move away from each other, so that the rear ends of the two first hinged rods 210 move away from each other. Since the two first hinged rods 210 are hinged to each other, the front ends of the two first hinged rods 210 move away from each other.

[0044] In this embodiment, a ratchet bar 120 is fixedly disposed on one of the inclined rods 132, and the ratchet bar 120 is disposed in a direction from one of the inclined rods 132 to the other inclined rod 132. A clamping block 121 is fixedly disposed on the other inclined rod 132, and the clamping block 121 and the ratchet bar 120 abut against each other. When the spinal surgery expander expands the vertebral body to a preset width, the clamping block 121 and the ratchet bar 120 abut against each other, thereby causing the angle formed by the front ends of the two first hinged rods 210 to no longer change.

[0045] In this embodiment, a spinal surgery distractor further includes two supporting springs 110 , one end of each supporting spring 110 is fixedly disposed on an inclined rod 132 , and the other ends of the two supporting springs 110 are in contact with each other.

[0046] Working process: In the initial state, the rotating plate 360 ​​is in the first state. Pick up the spinal surgery spreader, place the front ends of the two first hinged rods 210 between two adjacent vertebrae, squeeze the two oblique rods 132, so that the two oblique rods 132 are close to each other, which drives the two straight rods 131 and the ends connected to the first hinged rods 210 to move away from each other, so the rear ends of the two first hinged rods 210 move away from each other. Since the two first hinged rods 210 are hinged to each other, the front ends of the two first hinged rods 210 move away from each other.

[0047] The two first hinge rods 210 drive the two pedestals 330 and the rotating plate 360 ​​to move away from each other, and the pedestals 330 and the rotating plate 360 ​​drive the two adjacent vertebrae to move away from each other. At the same time, since the rotating plate 360 ​​and the pedestal 330 are rotatably connected, the rotating plate 360 ​​and the vertebrae are kept close and parallel, which can adapt to the inclination of the vertebrae, thereby increasing the contact area between the rotating plate 360 ​​and the vertebrae, preventing the vertebrae from being damaged due to the large pressure on the vertebrae caused by the small contact area between the rotating plate 360 ​​and the vertebrae.

[0048] When the spinal surgery expander expands the vertebral body to a preset width, the block 121 and the ratchet bar 120 abut against each other, so that the angle formed by the front ends of the two first hinge rods 210 no longer changes.

[0049] Afterwards, the intervertebral fusion cage is placed between the two seats 330 , and is pushed between two adjacent vertebral bodies. Finally, bone material is placed in the intervertebral fusion cage to complete the work.

[0050] Due to the diversity of the human spine, when using a spinal expander for expansion, the degree of inclination of the vertebrae is different. When the inclination of two adjacent vertebrae is small, it is easy to insert the intervertebral fusion cage. When the inclination of two adjacent vertebrae is large, the space between the two vertebrae is smaller as it approaches the depth. When the intervertebral fusion cage is pushed between the two vertebrae, it is easy to rub against the vertebrae, which may cause scratches on the vertebrae.

[0051] The first slider 370 is arranged so that when the intervertebral fusion device is located between the pedestals 330, the first slider 370 can abut against the intervertebral fusion device, and the intervertebral fusion device further pushes the two pedestals 330 away from each other, further increasing the space between the two vertebral bodies, thereby facilitating the intervertebral fusion device to enter between the two vertebral bodies and preventing the intervertebral fusion device from rubbing against the vertebral bodies.

[0052] Therefore, when the inclination of the vertebral body is greater, the deflection degree of the rotating plate 360 ​​is greater, and the inclination degree of the rotating plate 360 ​​is greater. When the rotating plate 360 ​​rotates, the rotating plate 360 ​​will push the connecting rod 400 to move toward the rear end of the first hinge rod 210. The connecting rod 400 drives the first slider 370 to slide in the first slide groove 341, and then drives the first slider 370 to move synchronously toward the rear end of the first hinge rod 210, so as to facilitate the contact between the intervertebral fusion device and the first slider 370, and the connecting rod 400 supports the rotating plate 360 ​​and the pedestal 330.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spinal surgery expander, characterized in that: It includes a supporting arm and two spreading mechanisms; the supporting arm includes two first hinged rods, the middle parts of the two first hinged rods are hinged to each other, and the two ends of each first hinged rod are respectively a front end and a rear end; Each spreading mechanism includes a pedestal and a rotating plate; each pedestal is detachably arranged on the front end of a first hinge rod, and the rotating plate is rotatably arranged on the pedestal; the spine includes a plurality of vertebrae, and the two rotating plates are used to be inserted between two adjacent vertebrae, and each rotating plate is against one vertebrae; the rotating plate has a first state and a second state, and the first state of the rotating plate is that each rotating plate is parallel to the axis of symmetry of the two first hinge rods, and along the direction from the front end to the rear end of the first hinge rod, the two sides of the rotating plate are the first side and the second side in sequence; the second state of the rotating plate is that each rotating plate is tilted, and along the direction from the first side to the second side of the rotating plate, the two rotating plates gradually move away from each other; A first slide groove is provided on each pedestal, and the first slide groove is arranged along the direction from the front end to the rear end of the first hinged rod where each pedestal is located; the symmetry axis of the two first hinged rods is the first direction, and a second slide groove is provided on each rotating plate, and when the rotating plate is in the first state, the second slide groove is arranged along the first direction; Each spreading mechanism also includes a connecting rod, each connecting rod is arranged on a pedestal, and each connecting rod is arranged along the direction from the front end to the rear end of the first hinged rod where each pedestal is located. A first slider is fixedly arranged at one end of the connecting rod, and the first slider is slidably arranged in the first sliding groove; a second slider is rotatably arranged at the other end of the connecting rod, and the second slider is slidably arranged in the second sliding groove.

2. A spinal surgery distractor according to claim 1, characterized in that: The first slider is provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are distributed in sequence along the direction from the rear end to the front end of the first hinge rod; and along the direction from the rear end to the front end of the first hinge rod, the first inclined surface gradually moves away from the base, and the second inclined surface gradually approaches the base.

3. A spinal surgery distractor according to claim 1, characterized in that: A rotating shaft is fixedly arranged on the pedestal, and the rotating shaft is arranged along a second direction, and the second direction is perpendicular to the first direction; the middle part of the rotating plate is rotatably connected to the rotating shaft, and the rotating plate rotates around the rotating shaft, so that the first sides of the two rotating plates are close to each other.

4. A spinal surgery distractor according to claim 3, characterized in that: Limiting rings are fixedly arranged at both ends of each rotating shaft, and the rotating plate is located between the two limiting rings on each rotating shaft.

5. The spinal surgery distractor according to claim 3, characterized in that: A third slide groove is respectively provided on the two side walls of the second slide groove perpendicular to the first direction, the third slide groove is arranged along the first direction, and the third slide groove is connected to the first slide groove; a hinge shaft is provided at the rotation connection between the connecting rod and the second slider, the hinge shaft is arranged along the second direction, and both ends of the hinge shaft are respectively slidably arranged in the two third slide grooves.

6. The spinal surgery distractor according to claim 1, characterized in that: A through hole is provided at the front end of each first hinged rod, the through hole is arranged along the second direction, a groove is provided at one end of the through hole, and the groove and the through hole are connected; a limiting column is fixedly provided on each pedestal, one end of each limiting column is arranged in a through hole, and a baffle is fixedly provided at the other end of each limiting column, and the baffle is arranged in the groove.

7. The spinal surgery distractor according to claim 1, characterized in that: It also includes a supporting arm, which includes two second hinged rods, each of which includes a straight rod and an oblique rod; one end of the straight rod is rotatably connected to the rear end of the first hinged rod, and the other end of the straight rod is fixedly connected to the oblique rod; the connection between the straight rod and the oblique rod of one second hinged rod and the connection between the straight rod and the oblique rod of another second hinged rod are hinged to each other; along the direction from the front end to the rear end of the first hinged rod, the two oblique rods gradually move away from each other.

8. A spinal surgery distractor according to claim 7, characterized in that: A ratchet bar is fixedly arranged on one of the inclined rods, and the ratchet bar is arranged along the direction from one of the inclined rods to the other inclined rod; a clamping block is fixedly arranged on the other inclined rod, and the clamping block and the ratchet bar abut against each other.

9. The spinal surgery distractor according to claim 7, characterized in that: It also includes two supporting spring sheets, one end of each supporting spring sheet is fixedly arranged on an inclined rod, and the other ends of the two supporting spring sheets are in contact with each other.

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