CN111110338A - A posterior reduction device for atlantoaxial dislocation with movable clip arm - Google Patents
A posterior reduction device for atlantoaxial dislocation with movable clip arm Download PDFInfo
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- CN111110338A CN111110338A CN202010061585.3A CN202010061585A CN111110338A CN 111110338 A CN111110338 A CN 111110338A CN 202010061585 A CN202010061585 A CN 202010061585A CN 111110338 A CN111110338 A CN 111110338A
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- 230000009467 reduction Effects 0.000 title claims abstract description 16
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- 230000000670 limiting effect Effects 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 22
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- 238000005452 bending Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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- 238000011946 reduction process Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
- A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
- A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B2017/564—Methods for bone or joint treatment
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Abstract
本发明提出了一种带有活动夹手臂的寰枢椎脱位后路复位器，具有呈夹子状的限位架，夹子状限位架具有第一支架和第二支架，第一支架与第二支架于中部交点处交叉连接，第一支架和第二支架的尾端作为手柄端，第一支架的首端安装用于椎骨支撑的支撑臂，第二支架的首端安装用于椎骨复位的夹手臂；本发明带有活动夹手臂的寰枢椎脱位后路复位器，复位操作简单，提供了额外的复位力量，且可以准确的控制复位距离，解决了现有技术中后路复位力量不足，复位操作困难及复位效果不佳的问题；本发明还可用于除寰枢椎脱位外其它椎骨脱位的复位。
The invention provides a posterior atlantoaxial dislocation reducer with a movable clip arm, which has a clip-shaped limit frame, the clip-shaped limit frame has a first bracket and a second bracket, the first bracket and the second bracket The brackets are cross-connected at the intersection point in the middle, the tail ends of the first bracket and the second bracket are used as handle ends, the head end of the first bracket is installed with a support arm for vertebral support, and the head end of the second bracket is installed with a clip for vertebral reduction. arm; the present invention has a posterior atlantoaxial dislocation reducer with a movable clip arm, the reduction operation is simple, the additional reduction force is provided, the reduction distance can be accurately controlled, and the lack of posterior reduction force in the prior art is solved. The problem of difficult reduction operation and poor reduction effect; the invention can also be used for the reduction of other vertebral dislocations except atlantoaxial dislocation.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an atlantoaxial dislocation posterior repositor with movable clamping arms.
Background
At atlantoaxial, cervical vertebra, lumbar vertebrae etc, when needing to reset owing to dislocation or slippage, can adopt back way vertebral arch screw fixed rod reset system usually, however, above this kind carry out the centrum through the nail stick is fixed and resets, mainly rely on the pulling effect of nail stick to realize resetting, because the pulling of nail stick system is reset strength limited, often need increase the pre-curved radian of fixed stick in order to increase the strength that resets, but need the stick operation of trading repeatedly in order to realize satisfied reseing, but this method is difficult accurate control reset distance. In addition, even if the rod is bent and replaced repeatedly, the increased restoring force may not be sufficient to overcome the restoring resistance, and it is not uncommon to cause poor restoration. Thus, providing additional restoring force beyond that inherent in the rod and nail fixation system will facilitate reduction of atlantoaxial dislocation and the like.
Disclosure of Invention
The invention provides an atlantoaxial dislocation posterior repositor with movable clamping arms, which can provide additional resetting force and solve the problems of insufficient posterior resetting force, difficult resetting operation and poor resetting effect in the prior art.
The technical scheme of the invention is realized as follows: an atlantoaxial dislocation posterior restorer with a movable clamping arm is provided with a clamp-shaped limiting frame, the clamp-shaped limiting frame is provided with a first support and a second support, the first support and the second support are in cross connection at the intersection point of the middle parts, the tail ends of the first support and the second support are used as handle ends, the head end of the first support is provided with a supporting arm for supporting vertebra, and the head end of the second support is provided with a clamping arm for restoring vertebra; the clamping arm comprises a fixed pipe, a movable rod and a clamping hand part for clamping vertebrae, the fixed pipe is arranged at the head end of the first bracket, and the movable rod penetrates through the fixed pipe and is movably connected with the clamping hand part; the support arm has a support portion that acts directly on the vertebra.
Preferably, the head end of the first bracket is bent at an angle α relative to the first bracket, correspondingly, the head end of the second bracket is bent at an angle β relative to the second bracket, preferably, the bending direction of the head end of the first bracket is the same as that of the head end of the second bracket, preferably, α or β is in the range of 45-180 degrees, and preferably, α is β.
Preferably, the clamping hand part comprises a clamping head for clamping the atlas posterior arch, an adjusting piece for adjusting the tightness of the clamping head and a connecting rod for connecting a movable rod, the clamping head is connected with the head end of the connecting rod, and the movable rod is connected with the tail end of the connecting rod; the fixed pipe is sleeved on the movable rod and the connecting rod and used for limiting the moving direction of the movable rod and the connecting rod; the adjusting piece is matched with the chuck to clamp the posterior arch of the atlas, and the movable rod drives the chuck to push forwards or pull backwards through the connecting rod to realize the posterior reduction of the vertebra.
Preferably, the chuck includes two open tong, and the root link of two tong is equipped with a plurality of sawtooth with connecting rod head end fixed connection, the front end of tong, and the height of sawtooth reduces in proper order by the front end of tong to the rear end.
Preferably, the head end of the connecting rod is provided with a fixing part, and the fixing part is used for fixing the adjusting piece at different positions of the connecting rod so as to adjust the opening degree of the two clamping hands; the fixed part is of an external thread structure, the adjusting piece comprises a rotating end and a clamping end for clamping the chuck, the rotating end is provided with an internal thread which can be screwed into the external thread structure, and the adjusting piece can move relative to the connecting rod by adjusting the rotating end; the clamping end is designed to be hollow, and when the adjusting piece moves on the connecting rod, the clamping end extrudes the clamping head so as to adjust the opening degree of the two clamping hands.
Preferably, the tail end of the connecting rod is provided with a concave cavity; the movable rod comprises a first screw rod used for screwing the fixed pipe, the head end of the first screw rod is provided with a clamping end which is matched with the concave cavity and is used for clamping into the concave cavity, and the head end of the first screw rod is movably connected with the tail end of the connecting rod through the matching of the clamping section and the concave cavity; the tail end of the first screw rod is provided with a nut used for rotating the movable rod; the nut drives the first screw to rotate, so that the movable rod moves in or out of the fixed pipe in a screwing mode, and the chuck is driven to move forwards or backwards through the connecting rod.
Preferably, a limit structure is arranged between the connecting rod and the fixed pipe to prevent the connecting rod from rotating in the fixed pipe;
the limiting structure is as follows: the connecting rod is equipped with first spacing plane, fixes intraductal cavity that accords with the connecting rod cross section that is equipped with, and the cavity is equipped with the spacing plane of second, and the first spacing plane restricts the connecting rod at fixed intraductal rotation with spacing planar laminating back of second.
Preferably, the fixed pipe is further provided with a visible area and scales for observing the moving distance of the movable rod.
Preferably, the supporting part is provided with an arc concave surface for avoiding the spinous process of the axis, so that the supporting part can avoid the interference of the spinous process of the axis and support on the articular process or the lateral mass.
Preferably, be equipped with stop device between first support handle end and the second support handle end, stop device includes second screw rod and two stop nut, second screw rod one end is passed through the connecting piece and is fixed at second support handle and serve, correspondingly, be equipped with the through-hole on the first support handle end, first stop nut is passed in proper order to the other end of second screw rod, through-hole and second stop nut, inject the position of first support handle end on the second screw rod through two stop nut, thereby play spacing effect to the distance between two handle ends.
The invention has the advantages that when the reposition is carried out, the handle end is adjusted to drive the clamping arm and the supporting part to reach the distance between the dislocated atlas and the normal axis according to the distance of the dislocated vertebra, the supporting part is arranged at the articular process or the lateral mass of the axis, the dislocated atlas is pulled by the clamping arm to be used as a supporting point, and the reposition distance can be accurately observed and controlled because the fixed tube is provided with scales; the atlantoaxial dislocation posterior repositor with the movable clamping arms can provide additional resetting force, is simple in resetting operation, can accurately control the resetting distance, and solves the problems of insufficient posterior resetting force, difficult resetting operation and poor resetting effect in the prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the atlantoaxial dislocation posterior repositor with movable clamping arms of the present invention;
FIG. 2 is a schematic view of the structure of the gripper bar of the present invention;
FIG. 3 is a schematic structural view of the movable bar of the present invention;
FIG. 4 is a schematic structural view of the fixing tube of the present invention;
FIG. 5 is a schematic view of the combination of the gripper, the movable rod and the fixed tube;
FIG. 6 is an enlarged view taken at A in FIG. 5;
fig. 7 is a schematic view showing the support arm and the clamping arm in position and displacement for repositioning the dislocated vertebrae.
1, clamping arms; 11, clamping the hand part; 111 a hand grip; 112 saw teeth; 113 a connecting rod; 114 an adjustment member; 115 clamping end; 116 a rotating end; 117 a cavity; 118 a first limiting plane; 12, moving a bar; 121, a card input end; 122 a first screw; 123 screw caps; 13 fixing the tube; 131 a second limiting plane; 132 a cavity; 133 scales; 134 a visible area; 2 a first support; 3 a second support; 4 supporting the arm; 41 a support part; 42 an arc-shaped concave surface; 5 a handle end; 6 a second screw; 7, limiting nuts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the atlantoaxial dislocation posterior repositor with a movable clamping arm is provided with a clamp-shaped limiting frame, wherein the clamp-shaped limiting frame is provided with a first bracket 2 and a second bracket 3, the first bracket 2 and the second bracket 3 are in cross connection at the intersection of the middle parts, the tail ends of the first bracket 2 and the second bracket 3 are used as handle ends 5, the head end of the first bracket 2 is provided with a supporting arm 4 for supporting vertebrae, and the head end of the second bracket 3 is provided with a clamping arm 1 for resetting the vertebrae; the clamping arm 1 comprises a fixed pipe 13, a movable rod and a clamping hand part 11 for clamping vertebrae, the fixed pipe 13 is arranged at the head end of the first bracket 2, and the movable rod penetrates through the fixed pipe 13 and is movably connected with the clamping hand part 11; the support arm 4 has a support portion 41 that acts directly on the vertebrae.
This atlantoaxial dislocation posterior replacement device with activity clamp arm, first support 2 and fixed pipe 13, second support 3 and support arm 4 structure as an organic whole, and the stress of an organic whole structure is more even, increases the stability in the use.
Furthermore, the distance between the supporting arm 4 and the arm clamping arm 1 can be adjusted through the handle end 5 according to the distance between different vertebrae, so that the distance between different vertebrae can be adapted.
Furthermore, the head end of the first bracket 2 is bent at an angle α with respect to the first bracket 2, correspondingly, the head end of the second bracket 3 is bent at an angle β with respect to the second bracket 3, preferably the bending direction of the head end of the first bracket 2 is the same as the bending direction of the head end of the second bracket 3, preferably α or β is in the range of 45-180 degrees, and preferably α is β.
Furthermore, due to the fact that the operation habits of doctors are different or the operation scenes are different, and the like, different support bending angles can meet different requirements.
As shown in fig. 2, the clamping part 11 includes a collet for clamping the posterior arch of the atlas, an adjusting member 114 for adjusting the tightness of the collet, and a connecting rod 113 for connecting a movable rod, the collet being connected to the head end of the connecting rod 113, the movable rod being connected to the tail end of the connecting rod 113; the fixed pipe 13 is sleeved on the movable rod and the connecting rod 113 and used for limiting the moving direction of the movable rod and the connecting rod 113; the adjusting piece 114 is matched with the clamping head to clamp the atlas posterior arch, and the movable rod drives the clamping head to pull back or push forward through the connecting rod 113 to realize the posterior reduction of the vertebra.
Further, the chuck comprises two open clamping hands 111, root connecting ends of the two clamping hands 111 are fixedly connected with the head ends of connecting rods 113, a plurality of saw teeth 112 are arranged at the front ends of the clamping hands 111, and the heights of the saw teeth 112 are sequentially reduced from the front ends to the rear ends of the clamping hands 111, so that the saw teeth 112 form a gradient shape; if the serrations 112 are at the same height, sliding teeth occur during posterior distraction, and the posterior arch of the atlas can be better gripped and clenched by a gradient serration 112 with a high anterior portion and a low posterior portion, thereby preventing slippage during the posterior distraction of the reduction process.
Furthermore, the head end of the connecting rod 113 is provided with a fixing part for fixing the adjusting piece 114 at different positions of the connecting rod 113, so as to adjust the opening degree of the two clamping hands 111; the fixing part can adopt threads to fix the adjusting part 114, or adopts a clamping type fixing method and the like;
in this embodiment, the adjusting element 114 includes a rotating end 116 and a clamping end 115 for clamping the chuck, the rotating end 116 is internally provided with a thread to be screwed into a first thread position, and the adjusting end 116 is adjusted to enable the adjusting element 114 to move relative to the connecting rod 113; the clamping end 115 is designed to be hollow, and the width of the clamping end 115 is smaller than the opening degree of the two chucks, so that when the adjusting piece 114 moves towards the head end of the connecting rod 113 on the connecting rod 113, the clamping end 115 extrudes the chucks, so that the opening degree of the two clamping hands 111 is adjusted, and the effect of clamping the spinous process or the posterior arch of the atlas is realized.
As shown in fig. 3, further, the end of the connecting rod 113 is provided with a cavity 117; the movable rod comprises a first screw 122 for screwing the fixed pipe 13, the head end of the first screw 122 is provided with a clamping end 121 which is matched with the cavity 117 and is used for clamping the cavity 117, and the head end of the first screw 122 is movably connected with the tail end of the connecting rod 113 through the matching of the clamping end 121 and the cavity 117; the end of the first screw 122 is provided with a nut 123 for rotating the movable rod; the nut 123 drives the first screw 122 to rotate, so that the movable rod 12 moves in or out of the fixed tube 13, and the connecting rod 113 drives the chuck to pull back, thereby moving the vertebra clamped by the chuck.
Furthermore, a limit structure is arranged between the connecting rod 113 and the fixed pipe 13 to prevent the connecting rod 113 from rotating in the fixed pipe 13, and the limit structure can be in a mode of limiting rotation by clamping through the appearance or in a mode of realizing directional sliding by arranging a notch and the like;
as shown in fig. 4, the limiting structure is adopted in this embodiment as an external shape to limit rotation by blocking: that is, the connecting rod 113 is provided with the first limiting plane 118 and the other surfaces are arc surfaces, the fixed pipe 13 is internally provided with a cavity 132 conforming to the shape of the connecting rod 113, the cavity 132 is provided with the second limiting plane 131 and the other surfaces are arc surfaces, and the first limiting plane 118 and the second limiting plane 131 can limit the connecting rod 113 to rotate in the fixed pipe 13 after being attached.
As shown in fig. 5 to 6, the fixed tube 13 is further provided with a visual area 134 for observing the moving distance of the movable rod, and the scale 133 can observe the moving distance of the movable rod inside the fixed tube 13, that is, the moving distance of the end of the clamping hand 111 through the visual area 134, so that the reduction distance of the vertebra can be visually observed.
Furthermore, the supporting portion 41 is provided with an arc concave surface 42 for avoiding the spinous process of the axis, the concave depth of the arc concave surface 42 is deeper than the height of the spinous process protruding out of the vertebral plate, so as to ensure that the arc concave surface 42 completely covers the spinous process, so that the supporting portion 41 can avoid the interference of the spinous process of the axis and support on the articular process or the lateral mass, wherein the shape of the supporting portion 41 can be square or circular arc, etc.;
the square support part 41 is adopted in the embodiment, the legs parallel to the left side and the right side of the square support part 41 can be placed at the articular process or the lateral mass to play a supporting role, and the articular process or the lateral mass is selected to be supported, so that the advantages that firstly, the contact area is large, the stress is more balanced, and secondly, the spinal cord is not damaged due to vertebral plate fracture caused by overlarge supporting force are avoided; the head and the tail of the supporting part 41 are opened, so that other tissues can be better avoided, and the operation space is enlarged.
Furthermore, a limiting device is arranged between the handle end 5 of the first bracket 2 and the handle end 5 of the second bracket 3, and the limiting device can be a clamping limiting device or a screw nut limiting device;
the limiting method of the screw nut adopted by the limiting device in the embodiment comprises a second screw 6 and two limiting nuts 7, one end of the second screw 6 is fixed on the handle end 5 of the second support 3 through a connecting piece, correspondingly, a through hole is formed in the handle end 5 of the first support 2, the other end of the second screw 6 sequentially penetrates through the first limiting nut 7, the through hole and the second limiting nut 7, the position of the handle end 5 of the first support 2 on the second screw 6 is limited through the two limiting nuts 7, and therefore the limiting effect is achieved on the distance between the two handle ends 5.
As shown in fig. 7, in particular use: observing the positional relationship between the dislocated vertebra and the vertebra serving as a support, adjusting the handle end 5 to enable the distance between the clamping arm 1 and the support arm 4 to be in accordance with the distance between the dislocated vertebra and the support vertebra, and screwing two limiting nuts to two sides of the first support 2 after the distance between the clamping arm 1 and the support arm 4 is adjusted to be used for fixing the first support 2 and preventing the first support 2 from sliding to cause dislocation of the support arm 4; then the handle end 5 is held by hand to deeply insert the supporting arm 4 into the vertebra, the arc concave surface 42 is corresponding to the spinous process of the axis vertebra, and the supporting legs at two sides are arranged at the articular process or the lateral mass; then the movable rod is rotated to push the clamping hands 11, the clamping hands 111 are pushed to the posterior arch or spinous process of the dislocated atlas, the opening degree between the two clamping hands 111 is reduced by adjusting the rotating end 116, so that the two clamping hands 111 bite the posterior arch or spinous process of the vertebra, then the nut 123 of the movable rod is rotated, the movable rod 12 moves in or out of the fixed tube 13 in a screwing-in or screwing-out manner, the connecting rod 113 drives the clamping head to move forwards or backwards, the vertebra clamped by the clamping head is moved, the effect of resetting is achieved, and meanwhile, the resetting distance can be accurately controlled through the visible area 134; after the reduction is completed, the rotating end 116 is adjusted to increase the opening degree between the two clamping hands, so that the atlantoaxial dislocation posterior reduction device with the movable clamping arms can be taken out by holding the handle end.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides an atlantoaxial dislocation back way restorer with activity clamp arm which characterized in that: the vertebra restoration device is provided with a clamp-shaped limiting frame, wherein the clamp-shaped limiting frame is provided with a first support and a second support, the first support and the second support are in cross connection at the intersection point of the middle parts, the tail ends of the first support and the second support are used as handle ends, the head end of the first support is provided with a supporting arm for supporting vertebra, and the head end of the second support is provided with a clamping arm for restoring the vertebra; the clamping arm comprises a fixed pipe, a movable rod and a clamping hand part for clamping vertebrae, the fixed pipe is arranged at the head end of the first support, and the movable rod penetrates through the fixed pipe and is movably connected with the clamping hand part; the support arm has a support portion that acts directly on the vertebra.
2. The atlantoaxial dislocation posterior repositor with the movable clamping arm as claimed in claim 1, wherein the head end of the first bracket is bent at a certain angle α relative to the first bracket, correspondingly, the head end of the second bracket is bent at a certain angle β relative to the second bracket, the bending direction of the head end of the first bracket is the same as that of the head end of the second bracket, preferably the value of α or β ranges from 45 degrees to 180 degrees, and the value of α is β.
3. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 1, wherein: the clamping hand part comprises a clamping head for clamping the atlas posterior arch, an adjusting piece for adjusting the tightness of the clamping head and a connecting rod for connecting the movable rod, the clamping head is connected with the head end of the connecting rod, and the movable rod is connected with the tail end of the connecting rod; the fixed pipe is sleeved on the movable rod and the connecting rod and used for limiting the moving direction of the movable rod and the connecting rod; the adjusting piece is matched with the chuck to clamp the posterior arch of the atlas, and the movable rod drives the chuck to move forwards or backwards through the connecting rod to realize the posterior reduction of the vertebra.
4. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 3, wherein: the chuck includes two open tong, the root link of two tong with connecting rod head end fixed connection, the front end of tong is equipped with a plurality of sawtooth, the height of sawtooth is reduced in proper order by the front end to the rear end of tong.
5. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 3, wherein: the head end of the connecting rod is provided with a fixing part which is used for fixing the adjusting piece at different positions of the connecting rod so as to adjust the opening degree of the two clamping hands;
the fixed part is of an external thread structure, the adjusting piece comprises a rotating end and a clamping end used for being clamped into the chuck, the rotating end is provided with an internal thread which can be screwed into the external thread structure, and the adjusting piece can move relative to the connecting rod by adjusting the rotating end; the clamping end is hollow, and when the adjusting piece moves on the connecting rod, the clamping end extrudes the chuck so as to adjust the opening degree of the two clamping hands.
6. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 3, wherein: the tail end of the connecting rod is provided with a concave cavity; the movable rod comprises a first screw rod used for screwing the fixed pipe, the head end of the first screw rod is provided with a clamping end which is matched with the concave cavity and is used for clamping into the concave cavity, and the head end of the first screw rod is movably connected with the tail end of the connecting rod through the matching of the clamping section and the concave cavity; the tail end of the first screw rod is provided with a nut used for rotating the movable rod; the nut drives the first screw to rotate, so that the movable rod moves in or out of the fixed pipe in a screwing mode, and the connecting rod drives the chuck to move forwards or backwards.
7. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 3, wherein: a limiting structure is arranged between the connecting rod and the fixed pipe to prevent the connecting rod from rotating in the fixed pipe;
the limiting structure is as follows: the connecting rod is provided with a first limiting plane, a cavity which is consistent with the cross section of the connecting rod is arranged in the fixing pipe, the cavity is provided with a second limiting plane, and the connecting rod is limited to rotate in the fixing pipe after the first limiting plane and the second limiting plane are attached.
8. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 1, wherein: the fixed pipe is also provided with a visible area and scales for observing the moving distance of the movable rod.
9. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 1, wherein: the supporting part is provided with an arc concave surface for avoiding the spinous process of the epistropheus, so that the supporting part can avoid the interference of the spinous process of the epistropheus and support the articular process or the lateral mass.
10. The atlantoaxial dislocation posterior repositor with movable clamping arms as claimed in claim 1, wherein: be equipped with stop device between first support handle end and the second support handle end, stop device includes second screw rod and two stop nut, second screw rod one end is passed through the connecting piece and is fixed at second support handle and serve, correspondingly ground, and first support handle serves and is equipped with the through-hole, first stop nut, through-hole and second stop nut are passed in proper order to the other end of second screw rod, prescribe a limit to the position of first support handle end on the second screw rod through two stop nut to distance between two handle ends plays spacing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061585.3A CN111110338A (en) | 2020-01-16 | 2020-01-16 | A posterior reduction device for atlantoaxial dislocation with movable clip arm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010061585.3A CN111110338A (en) | 2020-01-16 | 2020-01-16 | A posterior reduction device for atlantoaxial dislocation with movable clip arm |
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| CN111110338A true CN111110338A (en) | 2020-05-08 |
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| CN202010061585.3A Pending CN111110338A (en) | 2020-01-16 | 2020-01-16 | A posterior reduction device for atlantoaxial dislocation with movable clip arm |
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| CN211911768U (en) * | 2020-01-16 | 2020-11-13 | 中国人民解放军南部战区总医院 | Atlantoaxial dislocation posterior repositor with movable clamping arms |
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