Quantitative reduction surgical device

Abstract

The invention belongs to the field of medical instruments, and relates to a quantitative reduction surgical device which comprises a scale rack. The fixed handle comprises a first end and a second end, and the first end is fixedly connected with the end part of the rack; one end of the fixed rod is fixedly connected with a first preset position of the fixed handle, the other end of the fixed rod is connected with a screw connected with a first vertebral body, the movable handle comprises a third end and a fourth end, the third end of the movable handle moves in the extension direction of the rack under the action of external force, and the moving distance is indicated through scales; one end of the movable rod is connected with a second preset position of the movable handle, and the other end of the movable rod is connected with a screw connected with a second vertebral body; the included angle between the movable handle and the movable rod is fixed; when the movable handle gets close to or away from the fixed handle under external force, the movable rod is driven to get close to or away from the fixed rod, and then the position between the first vertebral body and the second vertebral body is adjusted. And the safety of using the quantitative reduction surgical device is improved.

Description

Technical Field

[0001] The invention belongs to the field of medical instruments, and in particular relates to a quantitative reduction surgical device. Background Art

[0002] CVJ malformation refers to abnormal pathological changes in the bones, soft tissues and / or nervous systems of the occipital bone, atlas and axis, including atlas occipitalization, skull base indentation, skull base pressure marks, skull subsidence, atlantoaxial dislocation, flat skull base, atlantoaxial malformation, and cervical segmentation incompleteness. The malformation of the craniocervical junction has a high disability rate and can be life-threatening. The cause of the disease is compression of the cervical spinal cord and instability between the craniocervical spine, which is affected by both congenital embryonic development factors and acquired pathological physiology and biomechanical changes. In many cases, multiple malformations coexist at the same time, with various manifestations and complex anatomical variations, which brings difficulties to the diagnosis and treatment of the disease and has always been a difficult problem in the international spinal neurosurgery community. In recent years, with the development of medical imaging technology and the improvement of internal fixation devices, the treatment paradigm of CVJ malformation has been continuously updated and evolved, but there is still a lack of systematic and standardized devices and products. Summary of the invention

[0003] The present invention is proposed based on the above-mentioned requirements of the prior art, and the technical problem to be solved by the present invention is to improve the safety of using a quantitative reduction surgical device.

[0004] In order to solve the above problems, the technical solution provided by the present invention includes: a rack with a scale arranged on it; a fixed handle including a first end and a second end, the first end being fixedly connected to the end of the rack; a fixed rod, one end of which is fixedly connected to the first preset position of the fixed handle, and the other end of which is connected to the screw connected to the first vertebra; a movable handle including a third end and a fourth end, the third end of the movable handle moves along the extension direction of the rack under the action of external force, and the moving distance is indicated by the scale; the fourth end is pivotally connected to the second end, a movable rod, one end of which is connected to the second preset position of the movable handle, and the other end of which is connected to the screw connected to the second vertebra; the angle between the movable handle and the movable rod is fixed; when the movable handle approaches or moves away from the fixed handle under external force, the movable rod is driven to approach or move away from the fixed rod, thereby adjusting the position between the first vertebra and the second vertebra.

[0005] Preferably, a protrusion is provided near the fourth end of the movable handle, a through hole is provided in the protrusion, and one end of the movable rod is provided with a thread, which is at least partially inserted from the lower end of the through hole and extends to the upper end of the through hole to be connected with a nut outside the through hole.

[0006] Preferably, a limiting groove is provided in the through hole, a protrusion adapted to the limiting groove is provided on the movable rod, and a standard line is provided on the protrusion; an opening is provided on the protrusion, the opening is connected with the through hole, a scale line is provided at the opening, and the opening exposes the standard line pointing to the scale line.

[0007] Preferably, a ratchet and a ratchet retracting key are provided on the third end of the movable handle, and the ratchet is extended or retracted from the third end of the movable handle by the control of the ratchet retracting key, and the ratchet is adapted to the tooth groove of the rack, and the ratchet includes a first side surface and a second side surface, and the angle between the first side surface and the radial direction of the rack is greater than the angle between the second side surface and the radial direction of the rack, and the first side surface and the second side surface are located on the same side of the corresponding radial direction, so that when the movable handle moves only under the push of external force, the first side surface will serve as the front surface of the ratchet movement; when the ratchet is retracted, the ratchet is separated from the rack, and the movable handle is driven to rotate in a direction away from or close to the fixed handle under the action of external force.

[0008] Preferably, the movable rod has a chamber inside at one end away from the pivot position, and the chamber is adapted to the upper end of the screw; an elastic wall is provided on the side wall of the chamber, one end of the elastic wall is fixed to the movable rod, and the other end is a movable end, which has the freedom to move in a direction away from the center of the chamber, and a protrusion is provided on the side of the movable end close to the center of the chamber, and the upper end of the screw has a groove, and the protrusion cooperates with the groove to clamp the screw in the chamber.

[0009] Preferably, the upper end of the screw has a through hole, and the connecting rod passes through the through hole in the screw and is arranged at the upper end of the screw.

[0010] Preferably, the rotating shaft in the fixed handle is arranged on a side close to the first end of the fixed handle relative to the fixed rod, and when the movable handle is driven close to the fixed handle under the action of external force, the movable rod moves away from the fixed rod.

[0011] Preferably, the rotating shaft in the fixed handle is arranged at a side away from the first end of the fixed handle relative to the fixed rod, and when the movable handle is driven close to the fixed handle under the action of external force, the movable rod approaches the fixed rod.

[0012] Preferably, a gripping portion is provided at the first end of the fixed handle, and the shape of the gripping portion is adapted to the shape of a human finger.

[0013] Preferably, a first cursor indicator block and a second cursor indicator block are provided on the rack, and both the first cursor indicator block and the second cursor indicator block have elastic parts, and the elastic parts engage with the tooth grooves on the rack in a pop-up state, and the elastic parts have the freedom to approach or move away from the corresponding rack parts to cooperate with the sliding of the first cursor indicator block and the second cursor indicator block on the rack under the action of external force.

[0014] Compared with the prior art, the quantitative reduction surgical device of the present invention can limit the maximum expansion angle or the maximum pressurization angle when expanding or pressurizing the gap, thereby improving the safety of using the quantitative reduction surgical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of this specification 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 recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a structural diagram of the spreading pliers in a specific embodiment of the present invention;

[0017] Figure 2 is a structural diagram of a pressure clamp in a specific embodiment of the present invention;

[0018] Figure 3 It is a structural diagram of a part of the spreading forceps in a specific embodiment of the present invention;

[0019] Figure 4 is a structural diagram of a propping rod in a specific embodiment of the present invention;

[0020] Figure 5 is a structural diagram of an elastic member in a specific embodiment of the present invention;

[0021] Figure 6 is a structural diagram of an open handle in a specific embodiment of the present invention;

[0022] Figure 7 is a structural diagram of a reamer in a specific embodiment of the present invention;

[0023] Figure 8 is a structural diagram of a blade in a specific embodiment of the present invention;

[0024] Fig. 9 It is a structural diagram of a rectangular channel in a specific embodiment of the present invention;

[0025] Fig.10 is a structural diagram of a pressurized occipital plate in a specific embodiment of the present invention;

[0026] Fig.11 It is a structural diagram of an intervertebral fusion cage in a specific embodiment of the present invention.

[0027] Reference numerals:

[0028] 1. Spreading pliers; 1-1. Spreading handle; 1-2. Spreading pliers fixing handle; 1-3. Spreading rod; 1-4. Spreading pliers fixing rod; 1-5. Graduation line; 1-6. Standard line; 1-7. Nut; 1-8. Screw; 1-9. Elastic wall; 1-9-1. Protrusion; 1-10. Ratchet; 1-10-1. First side surface; 1-10-2. Second side surface; 1-11. Rack; 1-12. Ratchet telescopic key; 1-13. First cursor indicator block; 1-14. Second cursor indicator block; 1- 15. Elastic part; 2. Pressurizing forceps; 2-1. Pressurizing handle; 2-2. Pressurizing forceps fixing handle; 2-3. Pressurizing rod; 2-4. Pressurizing forceps fixing rod; 3. Reamer; 3-1. Blade; 3-1-1. First blade; 3-1-2. Second blade; 3-2. Reamer handle; 3-3. Reamer rod; 3-4. Protective sleeve; 3-5. Limiting boss; 3-6. Rectangular channel; 4. Pressurized occipital plate; 4-1. Pressurized occipital plate body; 4-2. Reduction nut; 5. Intervertebral fusion device; 6. Connecting rod. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection, a mechanical connection, an electrical connection or a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The terms “at the bottom”, “at the top”, and “at the top” as used throughout the text refer to relative positions of components of a device and have nothing to do with their orientation in space.

[0032] To facilitate understanding of the embodiments of the present application, further explanation will be given below with reference to specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation on the embodiments of the present application.

[0033] This specific embodiment provides a quantitative reduction surgical device, which includes a distraction forceps 1 and a pressure forceps 2 .

[0034] The spreading forceps 1 are as Figure 1 As shown, the spreading pliers 1 includes a spreading handle 1-1 and a spreading pliers fixed handle 1-2, and the left ends of the spreading handle 1-1 and the spreading pliers fixed handle 1-2 are hingedly connected by a rotating shaft, so that the spreading handle 1-1 can rotate relative to the spreading pliers fixed handle 1-2. Specifically, the spreading pliers fixed handle 1-2 and the rotating shaft can be fixedly connected, and the spreading handle 1-1 is hingedly connected to the rotating shaft. Further, the spreading handle 1-1 and the spreading pliers fixed handle 1-2 can be arranged in the up and down direction, and the left end of the spreading handle 1-1 is provided with a slot, and the left end of the spreading pliers fixed handle 1-2 is provided with an axial hole. After the rotating shaft is arranged in the axial hole, the slot is clamped on the rotating shaft to provide a rotational connection between the spreading handle 1-1 and the rotating shaft.

[0035] A gripping portion is provided at the right end of the fixed handle 1 - 2 of the spreading pliers, and the shape of the gripping portion is adapted to the shape of human fingers, so that it is convenient for human hands to hold it firmly.

[0036] The left end of the spreading handle 1-1 is connected to the upper end of the spreading rod 1-3, and the left end of the spreading clamp fixed handle 1-2 is fixedly connected to the upper end of the spreading clamp fixed rod 1-4. The spreading rod 1-3 and the spreading clamp fixed rod 1-4 are respectively located on both sides of the rotating shaft.

[0037] The spreading rod 1-3 moves synchronously with the spreading handle 1-1, and the spreading clamp fixing rod 1-4 moves synchronously with the spreading clamp fixing handle 1-2. When the spreading handle 1-1 and the spreading clamp fixing handle 1-2 rotate relative to each other, the spreading rod 1-3 and the spreading clamp fixing rod 1-4 are driven to move accordingly. The length of the spreading handle 1-1 is greater than the length of the spreading rod 1-3, and the length of the spreading clamp fixing handle 1-2 is greater than the length of the spreading clamp fixing rod 1-4, so that it is more labor-saving to spread the intervertebral space by the spreading rod 1-3 and the spreading clamp fixing rod 1-4.

[0038] When the rotating shaft of the fixing handle 1-2 of the spreading clamp is arranged at a side away from the holding portion relative to the fixing rod 1-4 of the spreading clamp, the spreading clamp 1 is formed; and when the rotating shaft of the fixing handle 1-2 of the spreading clamp is arranged at a side close to the holding portion relative to the fixing rod 1-4 of the spreading clamp, the pressurizing clamp 2 is formed. Figure 2The pressurizing pliers 2 comprises a pressurizing handle 2-1 and a pressurizing pliers fixed handle 2-2, the left end of the pressurizing handle 2-1 is connected to the upper end of the pressurizing rod 2-3, the left end of the pressurizing pliers fixed handle 2-2 is fixedly connected to the upper end of the pressurizing pliers fixed rod 2-4, and the structures of the pressurizing handle 2-1 and the pressurizing pliers fixed handle 2-2 are the same as those of the spreading pliers 1.

[0039] Specifically, taking the spreading pliers 1 as an example, the top end of the spreading pliers fixing rod 1-4 is fixedly connected to the left end of the spreading pliers fixing handle 1-2 through a threaded connection. The top end of the spreading rod 1-3 has an external thread, and the left end of the spreading handle 1-1 has a through hole. The top end of the spreading rod 1-3 passes through the through hole and is threadedly matched with the nut 1-7 to fix the spreading rod 1-3 to the spreading handle 1-1. Furthermore, an opening facing forward is provided on the outer surface of the protruding portion of the spreading handle 1-1, and the opening is connected to the through hole at the left end of the spreading handle 1-1. A limiting groove is provided in the through hole, and a protrusion is provided in the spreading rod 1-3. The limiting groove cooperates with the protrusion to facilitate easy assembly. The protrusion is provided with a standard line 1-6, and the outer surface of the spreading rod 1-3 is provided with a scale line 1-5. When the spreading rod 1-3 is assembled on the spreading handle 1-1, the standard line 1-6 moves relative to the scale line 1-5. Figure 3 shown.

[0040] The pressurizing clamp 2 is also provided with scale lines 1-5, and the outer surface of the pressurizing rod 2-3 is also provided with standard lines 1-6. The structure of the pressurizing rod 2-3 and the pressurizing clamp fixing rod 2-4 is the same as that of the spreading clamp 1.

[0041] The bottom ends of the spread rod 1-3 and the spread clamp fixing rod 1-4 have a chamber inside, and the chamber can be fastened to the upper end of the screw 1-8. The upper end of the screw 1-8 has a through hole, and the screw 1-8 is set on the vertebral body through a device such as a nail inserter. The spread clamp fixing rod 1-4 is fastened to the screw 1-8 on the first vertebral body, and the spread rod 1-3 is fastened to the screw 1-8 on the second vertebral body.

[0042] Furthermore, the bottom ends of the spreading rod 1-3 and the spreading clamp fixing rod 1-4 are provided with an elastic wall 1-9, the inner wall of the free end of the elastic wall 1-9 has a protrusion 1-9-1, and the upper end of the screw 1-8 has a groove. The protrusion 1-9-1 cooperates with the groove to connect the spreading rod 1-3 and the spreading clamp fixing rod 1-4 with the screw 1-8, so that the spreading rod 1-3 and the spreading clamp fixing rod 1-4 can be conveniently connected with the screw 1-8 without using other tools, such as Figure 4 shown.

[0043] Due to the difference in the physiological curvature of the cervical spine, the spread rod 1-3 needs to be adjusted to a position that matches the physiological curvature of the cervical spine in order to be connected to the screw 1-8 on the second vertebral body. At this time, the nut 1-7 needs to be rotated to raise or lower the position of the spread rod 1-3. Specifically, when the nut 1-7 is rotated, the spread rod 1-3 slides in the opening on the outer surface of the spread handle 1-1, and the standard line 1-6 moves up and down relative to the scale line 1-5, thereby expressing the distance by which the spread rod 1-3 is raised or lowered.

[0044] After raising or lowering the distraction clamp fixing rod 1-4 to a position adapted to the physiological curvature of the cervical spine, hold the distraction handle 1-1 and the distraction clamp fixing handle 1-2 close to each other, drive the distraction rod 1-3 and the distraction clamp fixing rod 1-4 away from each other, and then distract the first vertebra and the second vertebra.

[0045] In addition, the upper end of the screw 1 - 8 has a through hole, and the connecting rod 6 passes through the through hole in the screw and is arranged at the upper end of the screw.

[0046] The structures of the pressurizing rod 2 - 3 and the pressurizing rod fixing rod 2 - 4 of the pressurizing forceps 2 and the way of connecting with the vertebral body are the same as those of the distraction forceps 1 .

[0047] The right end of the opening handle 1-1 is provided with a ratchet 1-10. Figure 6 A rack 1-11 is arranged at the right end of the fixed handle 1-2 of the spreading pliers, a scale is arranged on the rack 1-11, and the rack 1-11 extends from the right end of the fixed handle 1-2 of the spreading pliers to the right end of the spreading handle 1-1. The ratchet 1-10 can be extended or retracted from the right end of the opening handle 1-1 through the ratchet telescopic key 1-12. When the ratchet 1-10 is extended from the right end of the opening handle 1-1, the ratchet 1-10 is engaged with the rack 1-11. At this time, the opening handle 1-1 can only rotate in the direction close to the opening pliers fixed handle 1-2. Specifically, the ratchet 1-10 includes a first side surface 1-10-1 and a second side surface 1-10-2. The angle between the first side surface 1-10-1 and the radial direction of the rack is greater than the angle between the second side surface 1-10-2 and the radial direction of the rack. The first side surface and the second side surface are located on the same side of the radial direction of the rack, so that when the opening handle 1-1 moves under the push of an external force, the first side surface 1-10-1 will serve as the front surface of the ratchet movement. When the ratchet 1-10 is retracted from the right end of the opening handle 1-1, the ratchet 1-10 is separated from the rack 1-11. At this time, the opening handle 1-1 can be rotated in a direction close to the opening pliers fixed handle 1-2, or in a direction away from the opening pliers fixed handle 1-2.

[0048] In actual operation, when the ratchet 1-10 is extended from the right end of the distraction handle 1-1, if the distraction handle 1-1 is excessively rotated in a direction close to the distraction forceps fixed handle 1-2, an accident of excessive distraction of the intervertebral space and damage to the cervical spine may occur. In order to prevent the problem of excessive distraction during surgery, a first cursor indicator block 1-13 is preferably provided on the rack 1-11. The first cursor indicator block 1-13 can limit the maximum distraction angle of the distraction forceps, thereby preventing possible intraoperative accidents caused by excessive rotation of the distraction handle 1-1 and improving the safety of the distraction forceps.

[0049] Furthermore, the first cursor indicating block 1-13 can slide on the rack 1-11 and can be stuck in the tooth groove of the rack 1-11. Specifically, an elastic member 1-15 is provided in the first cursor indicating block, such as Figure 5 As shown, the elastic member has the freedom to move closer to or farther away from the corresponding rack portion.

[0050] When the ratchet 1-10 is retracted from the right end of the opening handle 1-1, if the opening handle 1-1 is excessively rotated in a direction away from the opening pliers fixed handle 1-2, the opening rod 1-3 may collide with the opening pliers fixed rod 1-4. In order to prevent damage to the device, preferably, a second cursor indicator block 1-14 is provided at the upper end of the rack 1-11, and the second cursor indicator block 1-14 can prevent the opening handle 1-1 from excessively rotating and possibly causing device collision. Furthermore, the second cursor indicator block 1-14 can slide on the rack 1-11 through the elastic member 1-15, and when the elastic member pops out, the first cursor indicator block can be clamped on the tooth groove of the rack 1-11.

[0051] Furthermore, the first cursor indicator block 1-13 and the second cursor indicator block 1-14 are provided with pointers, and the pointers point to the scales on the rack 1-11, so as to facilitate reading of the scales.

[0052] The right end of the pressurizing handle 2-1 of the pressurizing forceps 2 is also provided with a ratchet 1-10, and the right end of the pressurizing forceps fixed handle 2-2 is also provided with a rack 1-11. When the ratchet 1-10 is in the state of being retracted and extended from the right end of the pressurizing handle 2-1, if the pressurizing handle 2-1 is excessively rotated in the direction close to the pressurizing forceps fixed handle 2-2, an accident of excessively pressurizing the intervertebral space and damaging the cervical spine may occur. In order to prevent the problem of excessive pressurization during surgery, a first cursor indicator block 1-13 is preferably provided at the lower end of the rack 1-11. The first cursor indicator block 1-13 can limit the maximum pressurization angle of the pressurizing forceps, thereby preventing possible intraoperative accidents caused by excessive rotation of the spreading handle 1-1.

[0053] When the ratchet 1-10 is retracted from the right end of the pressurizing handle 2-1, if the pressurizing handle 2-1 is excessively rotated in a direction away from the pressurizing clamp fixed handle 2-2, the pressurizing rod 2-3 and the pressurizing clamp fixed rod 2-4 may be separated by a large distance, and the contact area between the pressurizing clamp 2 and the soft tissue may be too large. In order to prevent the instrument from damaging the soft tissue, preferably, a second cursor indicator block 1-14 is provided at the upper end of the rack 1-11, and the second cursor indicator block 1-14 can prevent the pressurizing handle 2-1 from excessively rotating and possibly damaging the soft tissue.

[0054] After the quantitative reduction surgical device has completed the work of expanding the vertebral body, there may be a need to ream the intervertebral end plate and other tissues. In this specific embodiment, a reamer 3 is provided, and the structure of the reamer is as follows: Figure 7 As shown, a blade 3-1 is arranged at the left end of the reamer 3, and a reamer handle 3-2 is arranged at the right end. The blade 3-1 and the reamer handle 3-2 are connected via a reamer rod 3-3. The blade 3-1 and the reamer handle 3-2 move synchronously. When the reamer handle 3-2 is rotated, the blade 3-1 rotates accordingly.

[0055] Furthermore, a protective sleeve 3-4 is provided on the reamer rod 3-3 to wrap the sharp blade 3-1 to prevent accidental injury of the blade.

[0056] When a person holds the reamer handle 3-2 to drive the reamer rod 3-3 to move in the axial direction, the blade 3-1 is driven to be exposed from the protective sleeve 3-4. Specifically, the blade 3-1 includes a first blade 3-1-1 and a second blade 3-1-2, and the first blade 3-1-1 and the second blade 3-1-2 are staggered in the left-right direction, such as Figure 8As shown. In this specific embodiment, the first blade 3-1-1 protrudes to the right, and the second blade 3-1-2 protrudes to the left. The cutting edges of the first blade 3-1-1 and the second blade 3-1-2 are arranged opposite to each other, and the other parts of the first blade 3-1-1 and the second blade 3-1-2 that are separated from each other, that is, the back of the blade, are formed into an arc shape. Therefore, when the reamer handle 3-2 is rotated clockwise, the first blade 3-1-1 and the second blade 3-1-2 are rotated clockwise accordingly, and the cutting edges of the first blade 3-1-1 and the second blade are able to ream the intervertebral end plates, etc. If the reamer handle 3-2 is rotated counterclockwise, the backs of the first blade 3-1-1 and the second blade 3-1-2 open the intervertebral space, and the reamer 3 plays the role of opening the intervertebral space.

[0057] Furthermore, grooves are provided on the relative edges of the first blade 3-1-1 and the second blade 3-1-2. When the blade 3-1 is rotated in the clockwise direction, the grooves can provide space for accommodating tissues such as the end plates reamed by the first blade 3-1-2 and the second blade 3-1-2, thereby preventing the resected tissues from being scattered at other locations between the vertebrae.

[0058] In this specific embodiment, the cutting angles of the first blade 3-1-1 and the second blade 3-1-2 can be designed to be smaller in size, which can effectively control the angle and amount of reaming of the first blade and the second blade into the end plate, and prevent the first blade and the second blade from overcutting the end plate.

[0059] The contact area between the sleeve and the tissue is reduced. The front end of the protective sleeve 3-4 is preferably provided with a sleeve viewing window, so that medical staff can observe the action of the reamer from the sleeve viewing window. Furthermore, a rectangular channel 3-6 is provided inside the protective sleeve 3-4, such as Fig. 9 As shown, the rectangular channel 3-6 is engaged with the first blade 3-1-1 and the second blade 3-1-2. When the first blade 3-1-1 and the second blade 3-1-2 are engaged with the rectangular channel 3-6, the first blade and the second blade cannot rotate in the protective sleeve, thereby preventing the first blade and the second blade from rotating by mistake before the reamer 3 enters the intervertebral space and damaging the external soft tissue. After the reamer rod 3-3 extends out of the protective sleeve 3-4 by a predetermined distance in the axial direction, the reamer rod 3-3 can rotate in the protective sleeve 3-4, thereby driving the first blade 3-1-1 and the second blade 3-1-2 to rotate to ream tissue or open the intervertebral space.

[0060] In addition, a limiting boss 3-5 is provided on the reamer rod 3-3 to prevent the blade 3-1 from overpenetrating in the axial direction and damaging the intervertebral tissue.

[0061] This specific embodiment also provides a pressurized occipital plate 4, the pressurized occipital plate 4 is as follows Fig.10 As shown, the pressurized occipital plate 4 includes a main body 4-1 and a resetting nut 4-2.

[0062] The main body 4-1 of the pressurized occipital bone board is generally in the form of a thin sheet, so as to better fit the shape of the occipital bone. The main body of the pressurized occipital bone board is provided with an opening, and the opening cooperates with the resetting nut 4-2 to fix the pressurized occipital bone board on the occipital bone. The pressure applied to the occipital bone can be controlled by adjusting the tightening degree of the resetting nut 4-2 to achieve the best treatment effect.

[0063] This specific embodiment also provides an intervertebral fusion cage 5, the intervertebral fusion cage 5 is as follows Fig.11 As shown, the intervertebral fusion cage has a sagittal or coronal angle design, which optimizes the position and stability of the intervertebral fusion cage and improves the success rate of fusion. Furthermore, the intervertebral fusion cage has multiple specifications to meet the needs of different patients.

[0064] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A quantitative reduction surgical device, characterized in that: include: a rack having scales thereon; A fixed handle, comprising a first end and a second end, wherein the first end is fixedly connected to the end of the rack; A fixing rod, one end of which is fixedly connected to the first preset position of the fixing handle, and the other end of which is connected to the screw connected to the first vertebral body. The movable handle comprises a third end and a fourth end. The third end of the movable handle moves along the extension direction of the rack under the action of an external force, and the moving distance is indicated by a scale. The fourth end is pivotally connected to the second end. A movable rod, one end of which is connected to the second preset position of the movable handle, and the other end of which is connected to the screw connected to the second vertebral body; the angle between the movable handle and the movable rod is fixed; When the movable handle moves closer to or farther from the fixed handle under external force, the movable rod is driven closer to or farther from the fixed rod, thereby adjusting the position between the first vertebral body and the second vertebral body.

2. The quantitative reduction surgical device according to claim 1, characterized in that: The movable handle is provided with a protrusion near the fourth end, and a through hole is provided in the protrusion. One end of the movable rod is provided with a thread, which is at least partially inserted from the lower end of the through hole and extends to the upper end of the through hole to be connected with a nut outside the through hole.

3. The quantitative reduction surgical device according to claim 2, characterized in that: A limiting groove is arranged in the through hole, a protrusion matching the limiting groove is arranged on the movable rod, and a standard line is arranged on the protrusion; The protrusion is provided with an opening, the opening is connected with the through hole, a scale line is provided at the opening, and the opening exposes the standard line to point to the scale line.

4. The quantitative reduction surgical device according to claim 1, characterized in that: A ratchet and a ratchet telescopic key are provided on the third end of the movable handle, and the ratchet is extended or retracted from the third end of the movable handle by the control of the ratchet telescopic key. The ratchet is adapted to the tooth groove of the rack, the ratchet comprises a first side surface and a second side surface, the angle between the first side surface and the radial direction of the rack is greater than the angle between the second side surface and the radial direction of the rack, the first side surface and the second side surface are located on the same side of the corresponding radial direction, so that when the movable handle moves only under the push of an external force, the first side surface will serve as the front surface of the ratchet movement; When the ratchet is retracted, the ratchet is separated from the rack, and the movable handle is driven to rotate in a direction away from or close to the fixed handle under the action of an external force.

5. The quantitative reduction surgical device according to claim 1, characterized in that: The movable rod has a chamber at one end away from the pivot position, and the chamber is adapted to the upper end of the screw; There is an elastic wall on the side wall of the chamber, one end of the elastic wall is fixed to the movable rod, and the other end is a movable end with the freedom to move in a direction away from the center of the chamber. A protrusion is provided on the side of the movable end close to the center of the chamber, and the upper end of the screw has a groove, and the protrusion cooperates with the groove to clamp the screw in the chamber.

6. The quantitative reduction surgical device according to claim 5, characterized in that: The upper end of the screw is provided with a through hole, and the connecting rod passes through the through hole in the screw and is arranged on the upper end of the screw.

7. The quantitative reduction surgical device according to claim 1, characterized in that: The rotating shaft in the fixed handle is arranged at a side close to the first end of the fixed handle relative to the fixed rod. When the movable handle is driven close to the fixed handle under the action of external force, the movable rod moves away from the fixed rod.

8. The quantitative reduction surgical device according to claim 1, characterized in that: The rotating shaft in the fixed handle is arranged at a side away from the first end of the fixed handle relative to the fixed rod. When the movable handle is driven close to the fixed handle under the action of external force, the movable rod is close to the fixed rod.

9. The quantitative reduction surgical device according to claim 1, characterized in that: The first end of the fixed handle is provided with a gripping portion, and the shape of the gripping portion is adapted to the shape of a human finger.

10. The quantitative reduction surgical device according to claim 1, characterized in that: A first cursor indicator block and a second cursor indicator block are arranged on the rack, and both the first cursor indicator block and the second cursor indicator block have elastic parts. The elastic parts are engaged with the tooth grooves on the rack in a pop-up state, and the elastic parts have the freedom to approach or move away from the corresponding rack parts to cooperate with the sliding of the first cursor indicator block and the second cursor indicator block on the rack under the action of external force.

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