Percutaneous internal fixation and pressurization distraction system for spine

Abstract

The utility model provides a percutaneous spine internal fixation pressurization distraction system which comprises an orthopedic rod, a plurality of screws and a locking nut, the orthopedic rod penetrates through the screws and is pressed by the locking nut, the percutaneous spine internal fixation pressurization distraction system further comprises a locking screw driver and an adjusting rod, adjusting holes are formed in the positions, corresponding to the screws, of the orthopedic rod, and the adjusting rod is arranged in the adjusting holes. An adjusting rack is arranged on one side in the adjusting hole; a fastening hole in the center of the locking nut penetrates through the locking nut, and a vertically-through through hole is formed in the center of the locking screwdriver. An adjusting gear matched with the adjusting rack is arranged at the bottom of the adjusting rod, the adjusting rod penetrates through the through hole and the fastening hole, and the adjusting gear at the bottom of the adjusting rod is located in the adjusting hole and meshed with the adjusting rack. According to the utility model, the rack is arranged on the orthopedic rod, and the orthopedic rod is adjusted by using the adjusting rod with the gear, so that the position adjustment of the orthopedic rod can be accurate to millimeter, the implantation of the fusion cage is facilitated, and the falling of the fusion cage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a percutaneous spinal reinforcement, compression and expansion system. Background Art

[0002] Currently, for more severe cases of lumbar disc herniation, doctors often surgically remove the herniated disc and then fill the gap left by the original disc with a physiological filler (such as bone from other parts of the body or a physiologically compatible metal). Ultimately, the two adjacent vertebrae heal together through bone growth. However, the proper amount of filler required to fill the gap left by the original disc is complex and can be challenging for doctors to determine. Furthermore, if the filler is not tightly pressed together after insertion, bone growth and healing are difficult, impacting the patient's recovery period and potentially requiring further surgery. Utility Model Content

[0003] (1) Technical issues to be resolved

[0004] The purpose of this utility model is to provide a percutaneous spinal reinforcement and compression system with the function of accurately adjusting the orthotic rod. To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] (2) Technical solution

[0006] A percutaneous spinal internal reinforcement and compression distraction system includes a correction rod, several screws and a locking nut. The correction rod passes through several of the screws and is tightened by the locking nut. It also includes a locking screwdriver and an adjustment rod. An adjustment hole is opened at a position corresponding to the screw on the correction rod, and an adjustment rack is provided on one side of the adjustment hole; the fastening hole in the center of the locking nut passes through the locking nut, and a through hole is opened in the center of the locking screwdriver that passes through the top and bottom; an adjustment gear is provided at the bottom of the adjustment rod that is compatible with the adjustment rack, and the adjustment rod passes through the through hole and the fastening hole, and the adjustment gear at its bottom is located in the adjustment hole and meshes with the adjustment rack.

[0007] Furthermore, a U-shaped portion is provided on the top of the screw, a U-shaped groove is provided in the middle of the U-shaped portion, and the correction rod is placed in the U-shaped groove.

[0008] Furthermore, internal threads matching the external threads of the locking nut are provided on both sides of the U-shaped groove.

[0009] Furthermore, the locking screwdriver includes two parts: an upper force-bearing part and a lower force-applying part, and the shape of the force-applying part is adapted to the fastening hole of the locking nut.

[0010] Furthermore, the orthotic rod is provided with scale lines.

[0011] Furthermore, a screwing hole is provided on the top of the adjusting rod.

[0012] (3) Beneficial effects

[0013] Compared with the existing technology, the utility model has obvious advantages and beneficial effects. Specifically, a rack is provided on the orthotic rod, and the orthotic rod is adjusted by using an adjusting rod with a gear, so that the position of the orthotic rod can be adjusted accurately to a millimeter, which facilitates the implantation of the fusion device and thus prevents the fusion device from falling out. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 1. It is a schematic diagram of the external structure of the orthopedic rod;

[0018] Figure 4 It is a schematic diagram of the appearance structure of the screw and the lock nut;

[0019] Figure 5 This is a schematic diagram of the appearance and structure of the locking screwdriver and the adjusting rod;

[0020] Figure 6 It is a partial three-dimensional cross-sectional view of the utility model;

[0021] Figure 7 It is a schematic diagram of the utility model in use state.

[0022] Description of Figure Numbers:

[0023] 1. Orthopedic rod; 11. Adjustment hole; 12. Adjustment rack;

[0024] 13. Scale line; 2. Screw; 21. U-shaped part;

[0025] 22. U-shaped groove; 23. Internal thread; 3. Lock nut;

[0026] 31. External thread; 32. Fastening hole; 4. Locking screwdriver;

[0027] 41. force-bearing portion; 42. force-applying portion; 43. through hole;

[0028] 5. Adjustment rod; 51. Adjustment gear; 52. Twist hole;

[0029] 6. Vertebral body; 7. Intervertebral fusion cage. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0035] See also Figures 1 to 3As shown, a percutaneous spinal internal reinforcement and compression distraction system includes a correction rod 1, several screws 2 and a locking nut 3. The correction rod 1 passes through several of the screws 2 and is tightened by the locking nut 3. It also includes a locking screwdriver 4 and an adjusting rod 5. An adjustment hole 11 is provided at a position corresponding to the screw 2 on the correction rod 1, and an adjustment rack 12 is provided on one side of the adjustment hole 11; the fastening hole 32 in the center of the locking nut 3 passes through the locking nut 3, and a through hole 43 is provided in the center of the locking screwdriver 4 that passes through the top and bottom; an adjusting gear 51 is provided at the bottom of the adjusting rod 5 that is compatible with the adjusting rack 12, and the adjusting rod 5 passes through the through hole 43 and the fastening hole 32, and the adjusting gear 51 at its bottom is located in the adjusting hole 11 and engages with the adjusting rack 12.

[0036] It is worth mentioning that Figure 4 The screw 2 has a U-shaped portion 21 at its top, with a U-shaped groove 22 in the middle. The orthopedic rod 1 is placed within this U-shaped groove 22. The U-shaped design allows the orthopedic rod 1 to be inserted directly from above, making it easy to operate. Correspondingly, the U-shaped groove 22 has internal threads 23 on both sides that mate with the external threads 31 of the locking nut 3, allowing the locking nut 3 to tighten against the orthopedic rod 1.

[0037] It is understandable that if Figure 5 The locking screwdriver 4 includes two parts: an upper force-bearing part 41 and a lower force-applying part 42. The force-bearing part 41 is used for the operator to hold or other methods. The shape of the force-applying part 42 is adapted to the fastening hole 32 of the locking nut 3, and is used to drive the locking nut 3 to rotate, thereby tightening or loosening it.

[0038] It is worth adding that Figure 3 The orthotic rod 1 is provided with scale lines 13, which makes it easier for the surgeon to judge the scale of compression or expansion.

[0039] It should be added that, Figure 5 A screwing hole 52 is provided on the top of the adjusting rod 5 to facilitate the doctor to rotate the adjusting rod 5 through a wrench. On the one hand, the wrench is more labor-saving. On the other hand, the rotation accuracy of the adjusting rod 5 is increased by extending the wrench, thereby accurately grasping the scale of pressure or expansion.

[0040] The operating method of the utility model is:

[0041] like Figure 7As shown, each screw 2 is driven into the corresponding vertebral body 6, and then the orthopedic rod 1 is placed; then the locking screwdriver 4 is used to screw the locking nut 3 into the top of the screw 2 and initially contact the orthopedic rod 1; then one of the locking nuts 3 is completely tightened; select the screw 2 that needs to be adjusted, keep the locking screwdriver 4 in the locking nut 3, pass the adjusting rod 5 through the through hole 43 of the locking screwdriver 4, so that the adjusting gear 51 is engaged with the adjusting rack 12, and select the rotation direction and rotation angle of the adjusting rod 5 as needed; when the orthopedic rod 1 is adjusted to the right position, keep the adjusting rod 5 in the position, rotate the locking screwdriver 4, so that the orthopedic rod 1 and the screw 2 are locked, and the compression and distraction operation of the spine is completed.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A percutaneous spinal internal reinforcement and compression distraction system, comprising a correction rod (1), a plurality of screws (2) and a locking nut (3), wherein the correction rod (1) passes through the plurality of screws (2) and is tightened by the locking nut (3), characterized in that: The invention also includes a locking screwdriver (4) and an adjusting rod (5); an adjusting hole (11) is provided on the orthopedic rod (1) at a position corresponding to the screw (2); an adjusting rack (12) is provided on one side of the adjusting hole (11); a fastening hole (32) in the center of the locking nut (3) passes through the locking nut (3); a through hole (43) is provided in the center of the locking screwdriver (4) that passes through the top and bottom; an adjusting gear (51) that is adapted to the adjusting rack (12) is provided at the bottom of the adjusting rod (5); the adjusting rod (5) passes through the through hole (43) and the fastening hole (32); the adjusting gear (51) at the bottom is located in the adjusting hole (11) and meshes with the adjusting rack (12).

2. The percutaneous spinal reinforcement and compression distraction system according to claim 1, characterized in that: The top of the screw (2) is provided with a U-shaped portion (21), the middle of the U-shaped portion (21) is provided with a U-shaped groove (22), and the orthopedic rod (1) is placed in the U-shaped groove (22).

3. The percutaneous spinal reinforcement and compression distraction system according to claim 2, characterized in that: Internal threads (23) that match the external threads (31) of the locking nut (3) are provided on both sides of the U-shaped groove (22).

4. The percutaneous spinal reinforcement and compression distraction system according to claim 1, characterized in that: The locking screwdriver (4) comprises two parts: an upper force-bearing part (41) and a lower force-applying part (42); the shape of the force-applying part (42) is adapted to the fastening hole (32) of the locking nut (3).

5. The percutaneous spinal reinforcement and compression distraction system according to claim 1, characterized in that: The orthopedic rod (1) is provided with scale lines (13).

6. The percutaneous spinal reinforcement and compression distraction system according to claim 1, characterized in that: The top of the adjusting rod (5) is provided with a screwing hole (52).

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