An improved operating system for cervical vertebral advancement surgery

Abstract

The present invention relates to the field of medical devices. An improved operating system for cervical vertebral advancement surgery includes a titanium plate system and a traction mechanism, wherein the titanium plate system includes a traction plate and a baffle; a convex portion extending outward is provided in the center of one side of the traction plate adjacent to the baffle; at least one lifting hole penetrating the traction plate is provided on the convex portion, and four screw holes are provided on the convex portion at the periphery of the lifting hole; the baffle is connected to the traction plate by screws passing through the mounting holes; positioning mounting holes are provided at both ends of the baffle; the traction mechanism includes a lifting rod, a support rod, a fixed support arm and a movable support arm, the support rod is fixedly connected to the fixed support arm, a slide rail slidably connected to the movable support arm is provided on the support rod, and the slide rail is relatively fixed to the movable support arm through a locking mechanism; at least three transverse limit grooves are provided on the support rod, and the limit grooves are used to insert the lifting rod. The present invention realizes the advancement of the vertebral body.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, in particular to a cervical vertebral body advancement operation system. Background Art

[0002] Although there is a concept of overall vertebral forward movement in existing cervical vertebral surgeries, it is difficult to implement due to the limitations of the titanium plate system. Secondly, during the intraoperative lifting, it can only be determined whether the vertebra is close to the posterior wall of the titanium plate, but the controllable forward movement of the vertebra cannot be achieved. The forward movement distance is observed by relying on the intraoperative "C" arm machine or "0" fluoroscopy, which significantly reduces the efficiency of the operation. In addition, vertebral lifting failure is prone to occur during the lifting process. This may be due to the inability to lift the vertebra as a whole or uneven lifting force, resulting in a change in the relative position of the vertebra and the intervertebral fusion device. The fusion device compresses the vertebra so that the vertebra cannot move forward smoothly. This situation is most common in the intervertebral space at the head and tail ends. This situation can be improved by using a smaller intervertebral fusion device, but the intervertebral space cannot be restored to the patient's natural height before the operation. The reduced intervertebral space height can easily cause stenosis of the nerve root outlet and lead to nerve root compression. There is also the possibility of intervertebral fusion failure in the long term. When the vertebral body is freed and the nut is tightened for lifting, the lifting is difficult due to incomplete vertebral freeing or being blocked by the intervertebral fusion device, which may cause damage to the screw channel and insufficient screw holding force, leading to surgical failure. Even if the vertebral body is pulled forward using a scraper and hook in the bone groove on both sides, the stability of the screw inserted into the damaged screw channel is still poor.

[0003] In summary, there is an urgent need for an improved operating system for cervical vertebral advancement surgery that can relieve compression without destroying the original anatomical state of the spinal cord, achieve modular and precise lifting of the surgical segments, increase surgical efficiency, and avoid lifting failure. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides an improved operating system for cervical vertebral advancement surgery to solve at least one of the above technical problems.

[0005] In order to achieve the above-mentioned object, the present invention provides an improved operating system for cervical vertebral body advancement surgery, comprising a titanium plate system and a traction mechanism, characterized in that the titanium plate system comprises a traction plate for traction of the vertebral body and a baffle for limiting the traction amount of the vertebral body;

[0006] The pulling plate is provided with an outwardly extending protruding portion at the center of one side adjacent to the baffle;

[0007] The outer convex part is provided with at least one pulling hole penetrating the pulling plate, and the outer convex part is provided with four screw holes penetrating the pulling plate at the periphery of the pulling hole, and the screw holes are used to connect the vertebral body to be pulled by screws;

[0008] The screw hole is used to connect the vertebral body to be pulled through the screw;

[0009] The center of the baffle is provided with a groove embedded in the outer convex part;

[0010] The upper and lower ends of the baffle plate and the upper and lower ends of the pulling plate are provided with corresponding mounting holes, and the baffle plate and the pulling plate are connected by screws passing through the mounting holes;

[0011] The upper and lower ends of the baffle are provided with positioning and mounting holes for connecting the vertebral bodies on the upper and lower sides of the vertebral body to be pulled;

[0012] The pulling mechanism comprises a lifting rod, a support rod, a fixed support arm and a movable support arm, wherein the support rod is fixedly connected to the fixed support arm, and a slide rail slidably connected to the movable support arm is provided on the support rod, and the slide rail is relatively fixed to the movable support arm through a locking mechanism;

[0013] The support rod is provided with at least one transverse limiting groove, the limiting groove is used to insert the lifting rod, the lifting rod is provided with a screw portion, the screw portion is threadedly connected with a nut, and the nut is against the support rod. The lifting rod passes through the limiting groove and the lifting hole, and is used to connect the vertebral fusion device between the vertebrae to be pulled.

[0014] The present invention realizes the forward movement of the vertebral body through the combination of the titanium plate and the pulling mechanism.

[0015] When in use, the traction plate is fixed to the vertebra to be pulled by means of screws passing through the screw holes; the baffle is fixed to the vertebrae on both sides of the vertebra to be pulled by means of screws passing through the positioning and mounting holes. The fixed support arm and the movable support of the traction mechanism are fixed to the vertebrae on both sides of the vertebra to be pulled. The lifting rod of the traction mechanism passes through the lifting hole, and after the lifting rod is connected to the vertebral fusion device between the vertebrae to be pulled, the lifting rod moves toward the baffle. After the outer protrusion of the traction plate is embedded in the groove of the baffle, the baffle is connected to the traction plate by screws, thereby achieving fixation after the vertebral body moves forward.

[0016] Further preferably, the fixed support arm and the movable support arm both include a connecting portion and a movable portion rotatably connected by bolts;

[0017] The connecting portion is connected to the supporting rod.

[0018] It is convenient to adjust the length direction of the lifting rod, the fixed support arm and the movable support arm, and it is convenient to connect the lifting rod with the vertebral fusion device.

[0019] Further preferably, the lifting rod is provided with scale lines.

[0020] Convenient for quick viewing of the pulling position.

[0021] Further preferably, the slide rail is a rack structure;

[0022] The locking mechanism comprises meshing teeth, a guide sleeve and a locking arm, wherein the guide sleeve is connected to the movable support arm;

[0023] The meshing teeth are meshed with the rack structure, the meshing teeth are rotatably connected with the guide sleeve, the guide sleeve is rotatably connected with the locking arm via a rotating shaft, and a torsion spring is sleeved on the rotating shaft, and the torsion spring arms of the torsion spring are respectively against the locking arm and the guide sleeve;

[0024] The locking arm is provided with a locking tooth which abuts against the rack structure.

[0025] Further preferably, the traction plate includes a bone-adhering portion and the outer convex portion arranged along the thickness direction, the width of the bone-adhering portion matches the width of the outer convex portion, and the upper and lower ends of the bone-adhering portion both exceed the outer convex portion.

[0026] Further preferably, notches are provided at the upper and lower ends of the baffle;

[0027] The baffle is located on both sides of the notch and is provided with positioning and mounting holes.

[0028] It is convenient to implement the pulling mechanism passing through the notch for fixation.

[0029] Further preferably, the pulling plate and the baffle are both plates made of titanium metal material.

[0030] Further preferably, the groove matches the pulling plate.

[0031] Further preferably, the mounting holes on the baffle are through holes, and the mounting holes on the bone-adhering portion are threaded holes.

[0032] Convenient for fixing with screws.

[0033] Further preferably, there are at least three limiting grooves, and at least three limiting grooves are arranged along the length direction of the support rod, and adjacent limiting grooves are connected to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a pulling plate according to a specific embodiment 1 of the present invention;

[0035] Figure 2 A schematic diagram of the structure of a pulling plate according to a specific embodiment 1 of the present invention;

[0036] Figure 3 This is a structural schematic diagram of a baffle in specific embodiment 1 of the present invention;

[0037] Figure 4 It is an exploded view of the traction plate, the baffle plate and the vertebral body of the specific embodiment 1 of the present invention;

[0038] Figure 5 A structural schematic diagram of a pulling mechanism according to a specific embodiment 1 of the present invention;

[0039] Figure 6 This is a top view of the support plate of specific embodiment 1 of the present invention.

[0040] Among them: 1 is a pulling plate, 2 is a baffle, 11 is an outer protrusion, 12 is a bone-contacting part, 111 is a screw hole, 112 is a lifting hole, 113 is a first mounting hole, 21 is a notch, 22 is a groove, 23 is a second mounting hole, 8 is a pulling mechanism, 81 is a fixed support arm, 82 is a lifting rod, 83 is a movable support arm, 85 is a locking mechanism, and 86 is a limiting groove. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] See also Figures 1 to 6 , Specific embodiment 1: An improved operating system for cervical vertebral advancement surgery, including a titanium plate system and a traction mechanism 8.

[0043] The titanium plate system includes a traction plate 1 for pulling the vertebral body and a baffle 2 for limiting the amount of vertebral body pulling. The traction plate 1 includes a bone-adhering portion 12 and an outer convex portion 11 arranged along the thickness direction. The width of the bone-adhering portion 12 matches the width of the outer convex portion 11, and the upper and lower ends of the bone-adhering portion 12 exceed the outer convex portion 11. The traction plate 1 is provided with an outer convex portion 11 extending outward in the center of one side adjacent to the baffle 2; the outer convex portion 11 is provided with at least two pulling holes 112 penetrating the bone-adhering portion 12 and the outer convex portion 11, and the traction plate 1 is provided with at least three screw holes 111 penetrating the bone-adhering portion 12 and the outer convex portion 11 on the periphery of the pulling hole 112, and the screw holes 111 are used to connect the vertebral body to be pulled by screws. Preferably, there are 4 screw holes, and there are two threaded holes above the pulling hole. There are two screw holes below the pulling hole. The screw holes above and below the pulling hole fix different vertebrae.

[0044] A groove 22 is provided in the center of the baffle plate 2 to be embedded in the outer protrusion 11; corresponding mounting holes are provided at the upper and lower ends of the baffle plate 2 and the upper and lower ends of the bone-attaching portion 12 (the mounting hole of the baffle plate 2 is the second mounting hole 23, and the mounting hole on the bone-attaching portion 12 is the first mounting hole 113), and the baffle plate 2 and the bone-attaching portion 12 are connected by screws passing through the mounting holes. Positioning mounting holes for connecting the vertebral bodies on the upper and lower sides of the vertebral body to be pulled are provided at the upper and lower ends of the baffle plate 2. A mounting hole is provided between the positioning mounting holes at the upper and lower ends. And the mounting holes are located on the side adjacent to the groove.

[0045] The pulling mechanism 8 includes a lifting rod 82, a support rod, a fixed support arm 81 and a movable support arm 83. The support rod is fixedly connected to the fixed support arm 81. The support rod is provided with a slide rail slidably connected to the movable support arm 83. The slide rail is relatively fixed to the movable support arm 83 through a locking mechanism 85. The support rod is provided with at least one limiting groove 85, and the limiting groove 85 is used to insert the lifting rod 82. The lifting rod 82 is provided with a screw portion, which is threadedly connected to a nut, and the nut is against the support rod. The present invention realizes the forward movement of the vertebral body through the combination of a titanium plate and a pulling mechanism 8. The inner diameter of the limiting groove is larger than the outer diameter of the lifting rod and smaller than the outer diameter of the nut. It is convenient for the lifting rod to have space for direction adjustment. The lifting rod is detachably connected to the thread of the vertebral fusion device away from the nut. Or, other detachable connection methods.

[0046] The fixed support arm 81 and the movable support arm both include a connecting portion and a movable portion that are rotatably connected by bolts; the connecting portion is connected to the support rod, so as to facilitate the adjustment of the length direction of the lifting rod 82, the fixed support arm 81, and the movable support arm 83, so as to facilitate the connection between the lifting rod 82 and the vertebral fusion device.

[0047] The lifting rod 82 is provided with scale lines to facilitate quick checking of the pulling position.

[0048] The slide rail is a rack structure; the locking mechanism 85 includes meshing teeth, a guide sleeve and a locking arm, the guide sleeve is connected to the movable support arm; the meshing teeth mesh with the rack structure, the meshing teeth are rotatably connected to the guide sleeve, the guide sleeve is rotatably connected to the locking arm through a rotating shaft, and a torsion spring is sleeved on the rotating shaft, and the torsion spring arms of the torsion spring are respectively against the locking arm and the guide sleeve; the locking arm is provided with a locking tooth that is against the rack structure. The rack structure is arranged on at least one side of the limit groove.

[0049] The baffle plate 2 has notches 21 at both ends, and positioning holes are respectively provided on both sides of the notch 21, so that the pulling mechanism 8 can be fixed through the notch 21. The pulling plate 1 has two upper and lower lifting holes 112, and four circumferentially arranged screw holes 111 are provided around the lifting holes 112.

[0050] The pulling plate 1 and the baffle plate 2 are both made of titanium metal. The number of pulling holes = the number of segments to be pulled - 1. The number of segments to be pulled is 2-6.

[0051] The groove 22 matches the outer protrusion 11 .

[0052] The mounting hole on the baffle 2 is a through hole, and the mounting hole on the outer protrusion 11 is a threaded hole, which is convenient for passing a screw for fixing.

[0053] Alternatively, the installation holes on the guide positioning plate and the traction plate are through holes. The screws need to be self-tapping screws. The lower ends of the installation holes of the bone-adjacent part of the traction plate and the lower ends of the installation holes of the guide positioning plate are provided with spring sheets. They are used to clamp the self-tapping screws so that they cannot move backward. The spring sheet is a metal sheet. The metal sheet is clamped into the threaded structure of the self-tapping screw to achieve locking.

[0054] Working principle: When in use, the traction plate is fixed to the vertebra to be pulled (the first vertebra to be pulled C4, the second vertebra to be pulled C5 and the third vertebra to be pulled C6) by screws passing through the screw holes; the baffle is fixed to the vertebrae on both sides of the vertebra to be pulled (the first fixed vertebra C3 and the second fixed vertebra C7) by screws passing through the positioning and mounting holes. The bottom of the fixed support arm and the movable support arm are connected to the vertebral screws installed on the vertebrae on both sides of the vertebra to be pulled (the vertebral screws are installed on the vertebrae on both sides of the vertebra to be pulled through the notch, and need to be removed after the final forward movement is completed). The lifting rod 82 of the traction mechanism 8 passes through the lifting hole. After the lifting rod 82 is connected to the vertebral fusion device between the vertebrae to be pulled, the lifting rod drives the vertebra to be pulled to move toward the baffle. After the outer protrusion of the traction plate is embedded in the groove of the baffle, the baffle is connected to the traction plate by screws, thereby realizing the fixation of the vertebra after the forward movement. And the screws are fixed on the vertebra after the forward movement. Improve the fixation strength.

[0055] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An improved operating system for cervical vertebral advancement surgery, comprising a titanium plate system and a traction mechanism, characterized in that: The titanium plate system includes a traction plate for traction of the vertebral body and a baffle plate for limiting the traction amount of the vertebral body; The pulling plate is provided with an outwardly extending protruding portion at the center of one side adjacent to the baffle; The outer convex part is provided with at least one pulling hole penetrating the pulling plate, and the outer convex part is provided with four screw holes penetrating the pulling plate at the periphery of the pulling hole, and the screw holes are used to connect the vertebral body to be pulled by screws; The center of the baffle is provided with a groove embedded in the outer convex part; The upper and lower ends of the baffle plate and the upper and lower ends of the pulling plate are provided with corresponding mounting holes, and the baffle plate and the pulling plate are connected by screws passing through the mounting holes; The upper and lower ends of the baffle are provided with positioning and mounting holes for connecting the vertebral bodies on the upper and lower sides of the vertebral body to be pulled; The pulling mechanism comprises a lifting rod, a support rod, a fixed support arm and a movable support arm, wherein the support rod is fixedly connected to the fixed support arm, and a slide rail slidably connected to the movable support arm is provided on the support rod, and the slide rail is relatively fixed to the movable support arm through a locking mechanism; At least one limiting groove is formed on the support rod, and the limiting groove is used to insert the lifting rod. The lifting rod is provided with a screw portion, and the screw portion is threadedly connected with a nut, and the nut abuts against the support rod. The lifting rod passes through the limiting groove and the lifting hole; When in use, the pulling plate is fixed to the vertebra to be pulled by screws passing through the screw holes; the baffle is fixed to the vertebrae on both sides of the vertebra to be pulled by screws passing through the positioning and mounting holes; The bottoms of the fixed support arm and the movable support arm are connected to vertebral body screws installed on the vertebral bodies on both sides of the vertebral body to be pulled; The pulling rod of the pulling mechanism passes through the pulling hole, and after the pulling rod is connected to the vertebral fusion device between the vertebrae to be pulled, the pulling rod drives the vertebrae to be pulled to move toward the baffle; After the outer protrusion of the pulling plate is embedded in the groove of the baffle plate, the baffle plate is connected to the pulling plate by screws, thereby achieving fixation of the vertebral body after forward movement, and the screws are fixed on the vertebral body after forward movement.

2. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The fixed support arm and the movable support arm both include a connecting portion and a movable portion rotatably connected by bolts; The connecting portion is connected to the supporting rod.

3. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The lifting rod is provided with scale lines.

4. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The slide rail is a rack structure; The locking mechanism comprises meshing teeth, a guide sleeve and a locking arm, wherein the guide sleeve is connected to the movable support arm; The meshing teeth mesh with the rack structure, the meshing teeth are rotatably connected to the guide sleeve, the guide sleeve is rotatably connected to the locking arm via a rotating shaft, and a torsion spring is sleeved on the rotating shaft, and the torsion spring arms of the torsion spring are respectively against the locking arm and the guide sleeve; The locking arm is provided with a locking tooth which abuts against the rack structure.

5. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The pulling plate comprises a bone-adhering portion and the outer protruding portion arranged along the thickness direction. The width of the bone-adhering portion matches the width of the outer protruding portion, and both upper and lower ends of the bone-adhering portion extend beyond the outer protruding portion.

6. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The baffle is provided with gaps at the upper and lower ends; The baffle is provided with positioning and mounting holes on both sides of the notch.

7. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The pulling plate and the baffle are both plates made of titanium metal material.

8. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The groove matches the convex portion.

9. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: The mounting holes on the baffle plate are through holes, and the mounting holes on the pulling plate are threaded holes.

10. The improved operating system for cervical vertebral advancement surgery according to claim 1, characterized in that: There are at least three limit grooves, which are arranged along the length direction of the support rod, and adjacent limit grooves are connected to each other.

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