Cervical spine spinous process fixation device, operating device and fixation system

Abstract

The utility model discloses a kind of cervical spine spinous process fixing devices, it includes first, second fixed plate, two first through holes are arranged on the first fixed plate, two second through holes are arranged on the second fixed plate, lock rod is arranged between the first through hole and the second through hole, first, second fixed plate are equipped with positioning protrusion and sharp protrusion on it.The utility model also discloses a kind of operating device, it includes two operating rods arranged in pincer shape, the clamping end of two operating rods is connected with clamping plate, two clamping plates are equipped with positioning recess, movable clamp arm and fixed clamp arm, movable clamp arm can be close to or away from fixed clamp arm under the driving of drive structure.The utility model also discloses a kind of cervical spine spinous process fixing system including above-mentioned cervical spine spinous process fixing device and operating device.The purpose is to provide a kind of cervical spine spinous process fixing device, operating device and fixing system, it can be mutually fixed to the spinous process of three vertebral bodies adjacent to each other of cervical vertebra.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a device for fixing the spinous process of the cervical vertebrae. Background Technology

[0002] In cervical fusion surgery, it is often necessary to fix the spinous processes of three adjacent cervical vertebrae (such as the fourth to sixth vertebrae or the fifth to seventh vertebrae) together to limit and fix the distance between the spinous processes, release compressed nerves and blood vessels, and relieve the patient's pain and discomfort. However, current technology does not have a relevant fixation device that can fix the spinous processes of three adjacent cervical vertebrae together. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a cervical spinous process fixation device, operating device and fixation system, which can fix the spinous processes of three adjacent cervical vertebrae to each other.

[0004] The cervical spinous process fixation device of this utility model includes a first fixation plate and a second fixation plate arranged opposite to each other. Both the first fixation plate and the second fixation plate are strip plates. One long side of both the first fixation plate and the second fixation plate is concave inward in an arc shape, and the other long side of both the first fixation plate and the second fixation plate is convex outward in an arc shape. Two first through holes are arranged at intervals along the length direction on the first fixation plate, and two second through holes are arranged at intervals along the length direction on the second fixation plate. The two first through holes and the two second through holes are arranged in a one-to-one correspondence. A locking rod is inserted between the first through hole and the corresponding second through hole. One end of the locking rod is engaged in the first through hole, and the other end of the locking rod is connected in the second through hole by a locking pin. Both the first fixation plate and the second fixation plate have pointed protrusions on their opposite sides. The side of the first fixation plate away from the second fixation plate has a first positioning protrusion, and the side of the second fixation plate away from the first fixation plate has a second positioning protrusion.

[0005] The cervical spinous process fixation device of this utility model includes a first through hole comprising a hemispherical portion and a truncated cone portion that are interconnected. The hemispherical portion and the truncated cone portion are arranged sequentially along the direction from the first fixing plate to the second fixing plate and are coaxially arranged. The diameter of the hole in the hemispherical portion gradually increases along the direction from the second fixing plate to the first fixing plate, and the diameter of the hole in the truncated cone portion gradually increases along the direction from the first fixing plate to the second fixing plate. The locking rod comprises a head and a rod portion that are interconnected. The head is spherical and matches the hemispherical portion of the first through hole. The diameter of the hole at the connection between the hemispherical portion and the truncated cone portion is smaller than the outer diameter of the locking rod head and larger than the outer diameter of the rod portion. The rod portion of the locking rod passes through the hemispherical portion and the truncated cone portion of the first through hole in sequence and is then inserted into the second through hole. The head of the locking rod is engaged in the hemispherical portion of the first through hole.

[0006] The cervical spinous process fixation device of this utility model includes two first positioning protrusions, each of which is semi-cylindrical. The axial direction of the two first positioning protrusions is arranged along the width direction of the first fixing plate. Each of the two first positioning protrusions corresponds to one of the two first through holes, and each of the two first through holes passes through its corresponding first positioning protrusion. Similarly, there are two second positioning protrusions, each of which is semi-cylindrical. The axial direction of the two second positioning protrusions is arranged along the width direction of the second fixing plate. Each of the two second positioning protrusions corresponds to one of the two second through holes, and each of the two second through holes passes through its corresponding second positioning protrusion.

[0007] In the cervical spinous process fixation device of this utility model, the two second positioning protrusions of the second fixing plate are provided with threaded holes. The threaded holes are arranged along the axial direction of the second positioning protrusions and communicate with the second through hole that passes through the second positioning protrusions. Locking pins are threadedly connected in the threaded holes, and the locking pins in the two threaded holes abut against the locking rods in the two second through holes respectively.

[0008] The cervical spinous process fixation device of this utility model has a first clamping groove at each of the two long sides of the first fixing plate and a second clamping groove at each of the two long sides of the second fixing plate.

[0009] The operating device of this utility model includes two operating levers arranged in a clamping shape. One end of each operating lever is a clamping end, and the other end is a gripping end. Each clamping end is connected to a clamping plate, and both clamping plates are straight plates. The two clamping plates are a first clamping plate and a second clamping plate, arranged opposite to each other. The side of the first clamping plate opposite to the second clamping plate has a first positioning groove, and the side of the second clamping plate opposite to the first clamping plate has a second positioning groove. The side of the first clamping plate opposite to the second clamping plate has a first fixed clamping arm and a first movable clamping arm. A fixed clamping arm is fixedly mounted on a first clamping plate, and a first movable clamping arm is slidably mounted on the first clamping plate. The first clamping plate is provided with a first driving structure, which can drive the first movable clamping arm to slide closer to or away from the first fixed clamping arm along the first clamping plate. A second fixed clamping arm and a second movable clamping arm are provided on the side of the second clamping plate opposite to the first clamping plate. The second fixed clamping arm is fixedly mounted on the second clamping plate, and the second movable clamping arm is slidably mounted on the second clamping plate. The second clamping plate is provided with a second driving structure, which can drive the second movable clamping arm to slide closer to or away from the second fixed clamping arm along the second clamping plate.

[0010] The operating device of this utility model includes a first strip groove on the side of the first clamping plate opposite to the second clamping plate. The first movable clamping arm is slidably disposed in the first strip groove. The first driving structure includes a first screw, which is rotatably mounted in the first strip groove. The axial direction of the first screw is the same as the length direction of the first strip groove. The first movable clamping arm is threadedly connected to the first screw. The first fixed clamping arm is fixedly disposed on the first clamping plate at one end of the first strip groove. The end of the first screw away from the first fixed clamping arm extends to the outside of the first clamping plate and is connected to the first rotating handle. The end of the first clamping plate with the first rotating handle is connected to the clamping end.

[0011] The operating device of this utility model includes a second strip-shaped groove on the side of the second clamping plate opposite to the first clamping plate. The second movable clamping arm is slidably disposed in the second strip-shaped groove. The second driving structure includes a second screw, which is rotatably mounted in the second strip-shaped groove. The axial direction of the second screw is the same as the length direction of the second strip-shaped groove. The second movable clamping arm is threadedly connected to the second screw. The second fixed clamping arm is fixedly disposed on the second clamping plate at one end of the second strip-shaped groove. The end of the second screw away from the second fixed clamping arm extends to the outside of the second clamping plate and is connected to the second rotating handle. The end of the second clamping plate with the second rotating handle is connected to the clamping end.

[0012] In the operating device of this utility model, the first positioning groove is a semi-cylindrical groove penetrating the first clamping plate. The axial direction of the first positioning groove is the same as the axial direction of the first screw and the length direction of the first strip groove. There are two first positioning grooves, which are respectively located on opposite sides of the first strip groove. The second positioning groove is a semi-cylindrical groove penetrating the second clamping plate. The axial direction of the second positioning groove is the same as the axial direction of the second screw and the length direction of the second strip groove. There are two second positioning grooves, which are respectively located on opposite sides of the second strip groove.

[0013] The cervical spinous process fixation system of this utility model includes the above-mentioned cervical spinous process fixation device and the above-mentioned operating device. The first fixing plate is clamped between the first movable clamping arm and the first fixed clamping arm of the first clamping plate. The side of the first clamping plate opposite to the second clamping plate abuts against the side of the first fixing plate away from the second fixing plate. The first positioning protrusion is located in the first positioning groove. The second fixing plate is clamped between the second movable clamping arm and the second fixed clamping arm of the second clamping plate. The side of the second clamping plate opposite to the first clamping plate abuts against the side of the second fixing plate away from the first fixing plate. The second positioning protrusion is located in the second positioning groove.

[0014] The difference between this invention and existing technology lies in its ability to fix the spinous processes of three adjacent cervical vertebrae. In use, two locking rods are inserted into the two first through holes of the first fixing plate. The first fixing plate is then placed between the first fixed arm and the first movable arm of the first clamping plate, with the side of the first fixing plate having the first positioning protrusion abutting against the side of the first clamping plate having the first positioning groove, and the first positioning protrusion positioned within the first positioning groove. At this point, one end of the locking rod is in the first through hole and will not slip out due to the obstruction of the first clamping plate. Next, the first driving structure drives the first movable arm to slide closer to the first fixed arm until the first fixing plate is clamped between the first movable arm and the first fixed arm. Then, the second fixing plate is placed between the second fixed arm and the second movable arm of the second clamping plate, with the side of the second fixing plate having the second positioning protrusion abutting against the side of the second clamping plate having the second positioning groove, and the second positioning protrusion positioned within the second positioning groove. Finally, the second driving structure drives the second movable arm... The arm slides close to the second fixed clamping arm until the second fixing plate is clamped between the second movable clamping arm and the second fixed clamping arm. Then, grasp the gripping ends of the two operating levers, placing the gripping end of one lever and its first clamping plate and first fixing plate on the left side of the spinous process of the cervical vertebra to be fixed, and placing the gripping end of the other operating lever and its second clamping plate and second fixing plate on the right side of the spinous process of the cervical vertebra to be fixed. Next, move the gripping ends of the two operating levers closer together, causing the gripping ends of the two operating levers to also move closer together. During this process, the two locking levers pass through... The gaps between the three vertebrae (there are two gaps between the three vertebrae, and the two locking rods pass through these two gaps respectively) are made so that the other ends of the two locking rods are inserted into the two second through holes of the second fixing plate respectively. The two clamping ends are made to move closer to each other until the pointed protrusion on the first fixing plate pierces the left side of the spinous process and the pointed protrusion on the second fixing plate pierces the right side of the spinous process. Then, the other ends of the two locking rods are fixedly connected to the two second through holes respectively by locking pins. In this way, the two fixing plates fix the spinous processes of the three adjacent vertebrae of the cervical spine to each other. Then, the first movable clamping arm slides away from the first fixed clamping arm via the first driving structure, releasing the first fixed plate. The second movable clamping arm slides away from the second fixed arm via the second driving structure, releasing the second fixed plate. Next, the gripping ends of the two operating levers move away from each other, and simultaneously, the clamping ends of the two operating levers also move away from each other. Thus, the two clamping ends drive the first clamping plate and the second clamping plate to move away from each other, that is, the first clamping plate separates from the first fixed plate, and the second clamping plate separates from the second fixed plate. Finally, the operating device can be withdrawn. Therefore, this utility model can fix the spinous processes of three adjacent cervical vertebrae together.

[0015] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a front view of the cervical spinous process fixation device of this utility model;

[0017] Figure 2 This is a top view of the cervical spinous process fixation device of this utility model;

[0018] Figure 3 This is a left view of the cervical spinous process fixation device of this utility model;

[0019] Figure 4 This is a right view of the cervical spinous process fixation device of this utility model;

[0020] Figure 5 This is a front view of the first fixing plate and locking rod in this utility model;

[0021] Figure 6 This is a top view of the first fixing plate and locking rod in this utility model;

[0022] Figure 7 This is a left view of the first fixing plate and the locking rod in this utility model;

[0023] Figure 8 This is a right view of the first fixing plate and the locking rod in this utility model;

[0024] Figure 9 This is a schematic diagram showing the connection between the locking rod and the first fixing plate in this utility model;

[0025] Figure 10 This is a front view of the second fixing plate in this utility model;

[0026] Figure 11 This is a top view of the second fixing plate in this utility model;

[0027] Figure 12 This is a left view of the second fixing plate in this utility model;

[0028] Figure 13 This is a right view of the second fixing plate in this utility model;

[0029] Figure 14 This is a front view of the operating device in this utility model;

[0030] Figure 15 This is a front view of the first clamping plate in this utility model;

[0031] Figure 16 This is a top view of the first clamping plate in this utility model;

[0032] Figure 17This is a right view of the first clamping plate in this utility model;

[0033] Figure 18 For along Figure 17 Sectional view of line AA in the middle;

[0034] Figure 19 This is a front view of the second clamping plate in this utility model;

[0035] Figure 20 This is a top view of the second clamping plate in this utility model;

[0036] Figure 21 This is a left view of the second clamping plate in this utility model;

[0037] Figure 22 For along Figure 21 Sectional view of the middle BB line;

[0038] Figure 23 This is a front view of the cervical spinous process fixation system of this utility model;

[0039] Figure 24 For along Figure 23 The C-direction view in the middle;

[0040] Figure 25 For along Figure 23 The view in direction D;

[0041] Figure 26 This is a top-view diagram showing the cervical spinous process fixation device of this utility model in use.

[0042] In the diagram: 1. First fixing plate; 2. Second fixing plate; 3. First positioning protrusion; 4. Second positioning protrusion; 5. Pointed protrusion; 6. Locking rod; 7. First clamping groove; 8. Second clamping groove; 9. Locking pin; 10. First through hole; 11. Second through hole; 12. Hemispherical part; 13. Frustum conical part; 14. Head; 15. Rod part; 16. Threaded hole; 17. Operating rod; 18. Grip end; 19. Clamping end; 20. Pin; 21. First rotating handle; 22. First movable clamping arm; 23. First clamping plate; 24. First fixing plate 25. Clamping arm; 26. Second rotating handle; 27. Second movable clamping arm; 28. Second clamping plate; 29. ​​Second fixed clamping arm; 30. First screw; 31. First positioning groove; 32. First strip-shaped slide; 33. First bearing; 34. Second positioning groove; 35. Second strip-shaped slide; 36. Second vertebral body; 37. Fifth vertebral body; 38. Sixth vertebral body; 39. Vertebral body; 40. Spinous process of the fourth vertebral body; 41. Spinous process of the fifth vertebral body; 42. Spinous process of the sixth vertebral body; 43. Spinous process. Detailed Implementation

[0043] like Figure 1 As shown, and in combination Figure 2-13 As shown, the cervical spinous process fixation device of this utility model includes a first fixing plate 1 and a second fixing plate 2 arranged opposite to each other. Both the first fixing plate 1 and the second fixing plate 2 are strip plates. The first fixing plate 1 has two first through holes 10 arranged at intervals along its length, and the second fixing plate 2 has two second through holes 11 arranged at intervals along its length. The two first through holes 10 and the two second through holes 11 are arranged in a one-to-one correspondence. A locking rod 6 is inserted between the first through hole 10 and the corresponding second through hole 11. One end of the locking rod 6 is engaged in the first through hole 10, and the other end of the locking rod 6 is fixedly connected to the second through hole 11 by a locking nail 9. The first fixing plate 1 and the second fixing plate 2 have pointed protrusions 5 on their opposite sides. The side of the first fixing plate 1 away from the second fixing plate 2 has a first positioning protrusion 3, and the side of the second fixing plate 2 away from the first fixing plate 1 has a second positioning protrusion 4.

[0044] The first positioning protrusion 3 and the pointed protrusion 5 are respectively fixed on the two opposite sides of the first fixing plate 1, and the second positioning protrusion 4 and the pointed protrusion 5 are respectively fixed on the two opposite sides of the second fixing plate 2.

[0045] The width of the first fixing plate 1 and the second fixing plate 2 are both arranged vertically, and the length of both are arranged horizontally. Figure 3 , 4 As shown in Figures 7, 8, 12, and 13, one long side of the first fixing plate 1 and the second fixing plate 2 (the upper long side shown in the figure) is concave inward in an arc shape, and the other long side of the first fixing plate 1 and the second fixing plate 2 (the lower long side shown in the figure) is convex outward in an arc shape. That is, the first fixing plate 1 and the second fixing plate 2 are both arc-shaped strip straight plates, which can better fit the cervical spine.

[0046] like Figure 9As shown, the cervical spinous process fixation device of this utility model includes a first through hole 10 comprising a hemispherical portion 12 and a frustum-shaped portion 13 that are interconnected. The hemispherical portion 12 and the frustum-shaped portion 13 are arranged sequentially along the direction from the first fixing plate 1 to the second fixing plate 2. Specifically, the hemispherical portion 12 is arranged on the side of the first fixing plate 1 that is away from the second fixing plate 2, and the frustum-shaped portion 13 is arranged on the side of the first fixing plate 1 that faces the second fixing plate 2. The hemispherical portion 12 and the frustum-shaped portion 13 are arranged coaxially. The diameter of the hole in the hemispherical portion 12 gradually increases along the direction from the second fixing plate 2 to the first fixing plate 1. The diameter of the truncated cone portion 13 gradually increases along the direction from the first fixed plate 1 to the second fixed plate 2. The locking rod 6 includes a head 14 and a rod portion 15 connected to each other. The head 14 is spherical and matches the hemispherical portion 12 of the first through hole 10. The diameter of the hole where the hemispherical portion 12 communicates with the truncated cone portion 13 is smaller than the outer diameter of the head 14 of the locking rod 6 and larger than the outer diameter of the rod portion 15. The rod portion 15 of the locking rod 6 passes through the hemispherical portion 12 and the truncated cone portion 13 of the first through hole 10 in sequence and is inserted into the second through hole 11. The head 14 of the locking rod 6 is engaged in the hemispherical portion 12 of the first through hole 10.

[0047] Since the diameter of the hole where the hemispherical part 12 connects with the truncated cone part 13 is smaller than the outer diameter of the head 14 of the locking rod 6 and larger than the outer diameter of the rod part 15, and the diameter of the hole where the hemispherical part 12 connects with the truncated cone part 13 is the smallest diameter of the first through hole 10, the rod part 15 of the locking rod 6 can pass through the hemispherical part 12 and the truncated cone part 13 of the first through hole 10 in sequence, while the head 14 will not pass from the hemispherical part 12 into the truncated cone part 13, but will be stuck in the hemispherical part 12.

[0048] Due to the presence of the hemispherical portion 12 and the frustum-shaped portion 13, the locking rod 6 can be axially adjusted relative to the hemispherical portion 12 and the frustum-shaped portion 13, such as... Figure 9 As shown, when the rod portion 15 of the locking rod 6 is offset axially relative to the hemispherical portion 12 and the frustum portion 13 (at this time, the head 14 of the locking rod 6 slides within the hemispherical portion 12), the locking rod 6 is offset to the maximum angle when the rod portion 15 abuts against the side wall of the frustum portion 13, and this maximum angle is set to 7.5 degrees.

[0049] like Figure 1-7As shown in Figures 10-11 and 13, the cervical spinous process fixation device of this utility model includes two first positioning protrusions 3, both of which are semi-cylindrical. The axial direction of the two first positioning protrusions 3 is arranged along the width direction of the first fixing plate 1. The two first positioning protrusions 3 are respectively arranged in a one-to-one correspondence with two first through holes 10, and the two first through holes 10 respectively penetrate their respective first positioning protrusions 3. There are also two second positioning protrusions 4, both of which are semi-cylindrical. The axial direction of the two second positioning protrusions 4 is arranged along the width direction of the second fixing plate 2. The two second positioning protrusions 4 are respectively arranged in a one-to-one correspondence with two second through holes 11, and the two second through holes 11 respectively penetrate their respective second positioning protrusions 4.

[0050] The first positioning protrusion 3 and the first fixing plate 1 are integrally formed, and the second positioning protrusion 4 and the second fixing plate 2 are also integrally formed. As described above, the width direction of the first fixing plate 1 and the second fixing plate 2 are both arranged vertically, while the axial direction of the first positioning protrusion 3 is arranged along the width direction of the first fixing plate 1, that is, the axial direction of the first positioning protrusion 3 is arranged vertically, and the axial direction of the second positioning protrusion 4 is arranged along the width direction of the second fixing plate 2, that is, the axial direction of the second positioning protrusion 4 is arranged vertically.

[0051] like Figure 2 , 4 As shown in Figure 11, in the cervical spinous process fixation device of this utility model, each of the two second positioning protrusions 4 of the second fixing plate 2 is provided with a threaded hole 16. The threaded hole 16 is arranged along the axial direction of the second positioning protrusion 4 and communicates with the second through hole 11 passing through the second positioning protrusion 4. A locking pin 9 is threadedly connected to the threaded hole 16. The locking pin 9 in the two threaded holes 16 respectively abuts against the rod portion 15 of the locking rod 6 in the two second through holes 11, that is, the locking pin 9 locks one end of the rod portion 15 of the locking rod 6 in the second through hole 11. In this embodiment, the threaded hole 16 is only provided at one end of the second positioning protrusion 4 (that is, the upper end in the figure), that is, the threaded hole 16 is provided at the long side end of the second fixing plate 2 that is concave inward (that is, the upper long side end of the second fixing plate 2 in the figure).

[0052] like Figure 3 , 4 As shown in Figures 7, 8, 12, and 13, the cervical spinous process fixation device of this utility model has a first clamping groove 7 on both long sides of the first fixing plate 1 (the upper long side and the lower long side shown in the figure); and a second clamping groove 8 on both long sides of the second fixing plate 2 (the upper long side and the lower long side shown in the figure).

[0053] like Figure 14 As shown, and in combination Figure 15-22As shown, the operating device of this utility model includes two operating levers 17 arranged in a clamp shape, that is, the two operating levers 17 are hinged to each other, and the hinge part of the two operating levers 17 is located between the two ends of the two operating levers 17 (that is, the hinge part is located between the two ends of one operating lever 17 and also between the two ends of the other operating lever 17). The two operating levers 17 are arranged in an X shape and are hinged to each other by a pin 20. Each of the two operating levers 17 has a clamping end 19 at one end and a gripping end 18 at the other end. A clamping plate is connected to each clamping end 19. Both clamping plates are straight plates, and are respectively a first clamping plate 23 and a second clamping plate 27. The first clamping plate 23 and the second clamping plate 27 are arranged opposite to each other. A first positioning groove 30 is provided on the side of the first clamping plate 23 opposite to the second clamping plate 27, and a second positioning groove 33 is provided on the side of the second clamping plate 27 opposite to the first clamping plate 23. A first fixed clamping arm 24 and a first movable clamping arm 22 are provided on the side of the first clamping plate 23 opposite to the second clamping plate 27. The first fixed clamping arm 24 is fixedly mounted on the first clamping plate. On the first clamping plate 23, the first movable clamping arm 22 is slidably disposed on the first clamping plate 23. The first clamping plate 23 is provided with a first driving structure, which can drive the first movable clamping arm 22 to slide along the first clamping plate 23 towards or away from the first fixed clamping arm 24. The second clamping plate 27 is provided with a second fixed clamping arm 28 and a second movable clamping arm 26 on the side opposite to the first clamping plate 23. The second fixed clamping arm 28 is fixedly disposed on the second clamping plate 27, and the second movable clamping arm 26 is slidably disposed on the second clamping plate 27. The second clamping plate 27 is provided with a second driving structure, which can drive the second movable clamping arm 26 to slide along the second clamping plate 27 towards or away from the second fixed clamping arm 28.

[0054] The operating device in this utility model, such as Figure 17 , 18 As shown, the first clamping plate 23 has a first strip groove 31 on its side opposite to the second clamping plate 27. The first movable clamping arm 22 is slidably disposed within the first strip groove 31. The first driving structure includes a first screw 29, which is rotatably mounted within the first strip groove 31. The axial direction of the first screw 29 is the same as the length direction of the first strip groove 31, and both are arranged vertically. The first movable clamping arm 22 is threadedly connected to the first screw 29. The first fixed clamping arm 24 is fixedly disposed on the first clamping plate 23 at one end of the first strip groove 31 (the lower end shown in the figure), and is located below the first movable clamping arm 22. The end of the first screw 29 away from the first fixed clamping arm 24 (the upper end shown in the figure) extends to the outside of the first clamping plate 23 and is fixedly connected to the first rotating handle 21. Figure 14 , 23 As shown in Figures 24 and 25, the first clamping plate 23 has a first rotating handle 21 at one end (the upper end shown in the figure) which is fixedly connected to the clamping end 19.

[0055] The first screw 29 is rotatably mounted in the first strip groove 31 via the first bearing 32. When the first screw 29 is rotated via the first rotating handle 21, the first movable clamping arm 22 is slidably disposed in the first strip groove 31 and is limited by the first strip groove 31. Therefore, the first movable clamping arm 22 will not rotate with the first screw 29. Since the first movable clamping arm 22 is threadedly connected to the first screw 29, the first movable clamping arm 22 will only slide along the first strip groove 31. Since the first fixed clamping arm 24 is fixedly disposed on the first clamping plate 23 at the lower end of the first strip groove 31, the first movable clamping arm 22 can slide downward toward the first fixed clamping arm 24 or upward away from the first fixed clamping arm 24 along the first strip groove 31. This enables the first driving structure to drive the first movable clamping arm 22 to slide along the first clamping plate 23 toward or away from the first fixed clamping arm 24.

[0056] The operating device in this utility model, such as Figure 21 , 22 As shown, the second clamping plate 27 has a second strip-shaped groove 34 on its side opposite to the first clamping plate 23. The second movable clamping arm 26 is slidably disposed within the second strip-shaped groove 34. The second driving structure includes a second screw, which is rotatably mounted within the second strip-shaped groove 34. The axial direction of the second screw is the same as the length direction of the second strip-shaped groove 34, and both are arranged vertically. The second movable clamping arm 26 is threadedly connected to the second screw. The second fixed clamping arm 28 is fixedly disposed on the second clamping plate 27 at one end of the second strip-shaped groove 34 (the lower end shown in the figure). The second fixed clamping arm 28 is located below the second movable clamping arm 26. The end of the second screw away from the second fixed clamping arm 28 (the upper end shown in the figure) extends to the outside of the second clamping plate 27 and is fixedly connected to the second rotating handle 25. Figure 14 , 23 As shown in Figure 25, the second clamping plate 27 has a second rotating handle 25 at one end (the upper end shown in the figure) which is fixedly connected to the clamping end 19.

[0057] The second screw is rotatably mounted in the second strip groove 34 via the second bearing 35. When the second screw is rotated via the second rotary handle 25, the second movable clamping arm 26 is slidably disposed within the second strip groove 34 and is limited by the second strip groove 34. Therefore, the second movable clamping arm 26 will not rotate with the second screw. Since the second movable clamping arm 26 is threadedly connected to the second screw, it will only slide along the second strip groove 34. Because the second fixed clamping arm 28 is fixedly disposed on the second clamping plate 27 at the lower end of the second strip groove 34, the second movable clamping arm 26 can slide downward toward the second fixed clamping arm 28 or upward away from the second fixed clamping arm 28 along the second strip groove 34. This enables the second drive structure to drive the second movable clamping arm 26 to slide along the second clamping plate 27 toward or away from the second fixed clamping arm 28.

[0058] The operating device in this utility model, such as Figure 16 , 17 As shown, the first positioning groove 30 is a semi-cylindrical groove penetrating the first clamping plate 23, which matches the shape of the first positioning protrusion 3 of the first fixing plate 1 (the first positioning protrusion 3 is semi-cylindrical). The axial direction of the first positioning groove 30 is the same as the axial direction of the first screw 29 and the length direction of the first strip groove 31, and all three are arranged vertically. The first positioning groove 30 penetrates the first clamping plate 23 vertically. There are two first positioning grooves 30, which are respectively located on opposite sides of the first strip groove 31. Figure 20 , 21 As shown, the second positioning groove 33 is a semi-cylindrical groove penetrating the second clamping plate 27, which matches the shape of the second positioning protrusion 4 of the second fixing plate 2 (the second positioning protrusion 4 is semi-cylindrical). The axial direction of the second positioning groove 33 is the same as the axial direction of the second screw and the length direction of the second strip groove 34, and all three are arranged vertically. The second positioning groove 33 penetrates the second clamping plate 27 vertically. There are two second positioning grooves 33, which are respectively located on opposite sides of the second strip groove 34.

[0059] Since the first positioning groove 30 and the first positioning protrusion 3 are both arranged vertically and their shapes match, the first positioning protrusion 3 can be placed in the first positioning groove 30. Similarly, since the second positioning groove 33 and the second positioning protrusion 4 are both arranged vertically and their shapes match, the second positioning protrusion 4 can be placed in the second positioning groove 33.

[0060] like Figure 23 As shown, and in combination Figure 24 , 25As shown, the cervical spinous process fixation system of this utility model includes the above-mentioned cervical spinous process fixation device and the above-mentioned operating device. The first fixing plate 1 is clamped between the first movable clamping arm 22 and the first fixed clamping arm 24 of the first clamping plate 23. The side of the first clamping plate 23 opposite to the second clamping plate 27 abuts against the side of the first fixing plate 1 away from the second fixing plate 2. That is, the side of the first clamping plate 23 with the first positioning groove 30, the first strip groove 31, the first movable clamping arm 22 and the first fixed clamping arm 24 abuts against the side of the first fixing plate 1 with the first positioning protrusion 3. The first positioning protrusion 3 is located in the first positioning groove 30. The second fixing plate 2 is clamped between the second movable clamping arm 26 and the second fixed clamping arm 28 of the second clamping plate 27. The side of the second clamping plate 27 opposite to the first clamping plate 23 abuts against the side of the second fixing plate 2 away from the first fixing plate 1. That is, the side of the second clamping plate 27 with the second positioning groove 33, the second strip groove 34, the second movable clamping arm 26 and the second fixed clamping arm 28 abuts against the side of the second fixing plate 2 with the second positioning protrusion 4. The second positioning protrusion 4 is located in the second positioning groove 33.

[0061] The first movable clamping arm 22 of the first clamping plate 23 is clamped in the first clamping groove 7 of the upper long side end (i.e., the long side end that is concave inward) of the first fixed plate 1, and the first fixed clamping arm 24 of the first clamping plate 23 is clamped in the first clamping groove 7 of the lower long side end (i.e., the long side end that is convex outward) of the first fixed plate 1. The second movable clamping arm 26 of the second clamping plate 27 is clamped in the second clamping groove 8 of the upper long side end (i.e., the long side end that is concave inward) of the second fixed plate 2, and the second fixed clamping arm 28 of the second clamping plate 27 is clamped in the second clamping groove 8 of the lower long side end (i.e., the long side end that is convex outward) of the second fixed plate 2.

[0062] Through the mutual cooperation of the first positioning protrusion 3 and the first positioning groove 30, and the mutual cooperation of the second positioning protrusion 4 and the second positioning groove 33, the first fixing plate 1 and the second fixing plate 2 can be arranged opposite to each other, and the two first through holes 10 on the first fixing plate 1 and the two second through holes 11 on the second fixing plate 2 can be arranged one-to-one. Since each first through hole 10 is provided with a locking rod 6, the two locking rods 6 can be arranged one-to-one with the two second through holes 11. Through the clamping of the first fixing plate 1 by the first movable clamping arm 22 and the first fixed clamping arm 24, and the clamping of the second fixing plate 2 by the second movable clamping arm 26 and the second fixed clamping arm 28, the first fixing plate 1 and the second fixing plate 2 can be kept in a state of relative arrangement.

[0063] The difference between this invention and the prior art lies in its ability to fix the spinous processes 43 of three adjacent cervical vertebrae 39. In use, two locking rods 6 are respectively inserted into the two first through holes 10 of the first fixing plate 1. Then, the first fixing plate 1 is placed between the first fixing arm 24 and the first movable arm 22 of the first clamping plate 23, with the side of the first fixing plate 1 having the first positioning protrusion 3 abutting against the side of the first clamping plate 23 having the first positioning groove 30. Simultaneously, the two first positioning protrusions 3 are respectively located within the two first positioning grooves 30. At this time, one end of the locking rod 6 is located... The first movable clamping arm 22 is driven to slide closer to the first fixed clamping arm 24 by the first driving structure. Specifically, the first screw 29 is rotated by the first rotating handle 21, so that the first movable clamping arm 22 slides downward closer to the first fixed clamping arm 24 until the first fixed plate 1 is clamped between the first movable clamping arm 22 and the first fixed clamping arm 24. At this time, the first movable clamping arm 22 is clamped in the first clamping groove 7 at the upper long side end of the first fixed plate 1, and the first fixed clamping arm 24 is clamped in the first clamping groove 7 at the lower long side end of the first fixed plate 1. Next, the second fixing plate 2 is placed between the second fixed clamping arm 28 and the second movable clamping arm 26 of the second clamping plate 27, and the side of the second fixing plate 2 with the second positioning protrusion 4 abuts against the side of the second clamping plate 27 with the second positioning groove 33. At the same time, the two second positioning protrusions 4 are respectively located in the two second positioning grooves 33. Then, the second movable clamping arm 26 is driven to slide closer to the second fixed clamping arm 28 by the second driving structure. Specifically, the second screw is rotated by the second rotating handle 25, so that the second movable clamping arm 26 slides downward closer to the second fixed clamping arm 28 until the second fixing plate 2 is clamped between the second movable clamping arm 26 and the second fixed clamping arm 28. At this time, the second movable clamping arm 26 is clamped in the second clamping groove 8 at the upper long side end of the second fixing plate 2, and the second fixed clamping arm 28 is clamped in the second clamping groove 8 at the lower long side end of the second fixing plate 2.

[0064] Next, for patients requiring surgery, they need to lie face down on the operating table, exposing the posterior cervical spine, i.e., the spinous processes 43 of the cervical spine facing upwards. Then, they need to grasp the gripping ends 18 of the two operating levers 17, as... Figure 23 As shown, with the gripping end 18 at the top and the clamping end 19 at the bottom, the end of the clamping plate with the rotating handle (which is fixedly connected to the clamping end 19) is arranged upwards. At this time, the end of the clamping plate with the rotating handle is the upper end, and the end without the rotating handle is the lower end. The movable clamping arm is located above the fixed clamping arm. Then, the upper long side of the fixed plate clamped by the movable clamping arm and the fixed clamping arm is arranged upwards, and the lower long side is arranged downwards (i.e., towards the cervical spine).

[0065] Next, place the clamping end 19 of one operating lever 17, along with its first clamping plate 23 and first fixing plate 1, on the left side of the spinous process 43 of the cervical vertebra to be fixed. Place the clamping end 19 of the other operating lever 17, along with its second clamping plate 27 and second fixing plate 2, on the right side of the spinous process 43 of the cervical vertebra to be fixed. Then, move the gripping ends 18 of the two operating levers 17 closer together, causing the clamping ends 19 of the two operating levers 17 to also move closer together. During this process, allow the two locking levers 6 to pass through the gaps between the three vertebral bodies 39 (there are two gaps between the three vertebral bodies 39, and the two locking levers 6 pass through these two gaps respectively), and adjust the locking levers 6 relative to each other. The offset angle of the first through hole 10 (the axial direction of the hemispherical part 12 and the frustum-shaped part 13) is adjusted so that the other ends of the two locking rods 6 are respectively inserted into the two second through holes 11 of the second fixing plate 2. The two clamping ends 19 continue to move closer to each other until the pointed protrusion 5 on the first fixing plate 1 penetrates the left side of the spinous process 43 and the pointed protrusion 5 on the second fixing plate 2 penetrates the right side of the spinous process 43. The pointed protrusion 5 enhances the fixation's firmness. Then, the other ends of the two locking rods 6 are fixedly connected to the two second through holes 11 by the locking pins 9. In this way, the two fixing plates 1 and 2 fix the spinous processes 43 of the three adjacent cervical vertebrae 39 to each other. Figure 26 As shown, at this time, the arc-shaped structure of the first fixing plate 1 and the second fixing plate 2 (that is, the upper long side of the fixing plate is concave inward and the lower long side is convex outward) can match the natural orientation of the spinous process 43 of the three vertebral bodies 39. Then, the first movable clamping arm 22 is slid away from the first fixed clamping arm 24 through the first driving structure to release the first fixed plate 1. Specifically, the first screw 29 is rotated by the first rotating handle 21 to make the first movable clamping arm 22 slide upward away from the first fixed clamping arm 24 to release the first fixed plate 1. The second movable clamping arm 26 is slid away from the second fixed arm through the second driving structure to release the second fixed plate 2. Specifically, the second screw is rotated by the second rotating handle 25 to make the second movable clamping arm 26 slide upward away from the second fixed clamping arm 28 to release the second fixed plate 2. Then, the gripping ends 18 of the two operating levers 17 move away from each other. At the same time, the clamping ends 19 of the two operating levers 17 also move away from each other. Thus, the two clamping ends 19 drive the first clamping plate 23 and the second clamping plate 27 to also move away from each other. That is, the first clamping plate 23 separates from the first fixed plate 1, and the second clamping plate 27 separates from the second fixed plate 2. Finally, the operating device can be withdrawn. Therefore, this utility model can fix the spinous processes 43 of three adjacent cervical vertebrae 39 to each other, such as... Figure 26As shown, in this embodiment, the spinous process 40 of the fourth cervical vertebra 36, ​​the spinous process 41 of the fifth cervical vertebra 37, and the spinous process 42 of the sixth cervical vertebra 38 are fixed. The first fixing plate 1 is fixed to the left side of the spinous process 43 of the aforementioned vertebra 39, and the second fixing plate 2 is fixed to the right side of the spinous process 43 of the aforementioned vertebra 39. Furthermore, one locking rod 6 passes through the gap between the fourth cervical vertebra 36 and the fifth cervical vertebra 37, and another locking rod 6 passes through the gap between the fifth cervical vertebra 37 and the sixth cervical vertebra 38.

[0066] As described above, the movable clamping arm is located above the fixed clamping arm, meaning the fixed clamping arm is positioned closer to the cervical spine than the movable clamping arm. To prevent the lower ends of the first clamping plate 23 and the second clamping plate 27 from contacting the cervical spine and creating resistance that would hinder the fixing of the two fixing plates 1 and 2 to the spinous process 43 or the separation of the two clamping plates 23 and 27 from the two fixing plates 1 and 2, the first fixed clamping arm 24 and the second fixed clamping arm 28 are respectively fixed at the lower ends of the first clamping plate 23 and the second clamping plate 27, and both extend downwards by a certain distance. Thus, the first fixed clamping arm 24 is lower than the lower end of the first clamping plate 23, and the second fixed clamping arm 28 is lower than the lower end of the second clamping plate 27. Figure 17 , 21 As shown. Figure 24 , 25As shown, since the first fixed clamping arm 24 and the second fixed clamping arm 28 are respectively lower than the lower ends of the first clamping plate 23 and the second clamping plate 27, after the first fixed plate 1 is clamped between the first movable clamping arm 22 and the first fixed clamping arm 24, the lower long side end of the first fixed plate 1 is also lower than the lower end of the first clamping plate 23. Similarly, after the second fixed plate 2 is clamped between the second movable clamping arm 26 and the second fixed clamping arm 28, the lower long side end of the second fixed plate 2 is also lower than the lower end of the second clamping plate 27. In this way, when the two fixed plates 1 and 2 are fixed on the spinous process 43, the lower long side ends of the first fixed plate 1 and the second fixed plate 2 will contact the cervical spine, while the lower ends of the first clamping plate 23 and the second clamping plate 27 will not contact the cervical spine. Therefore, the lower ends of the two clamping plates 23 and 27 will not cause resistance due to contact with the cervical spine, thus preventing the two fixed plates 1 and 2 from being fixed on the spinous process 43 or from being separated from the two fixed plates 1 and 2 respectively. Since the first fixing arm 24 is located in the first clamping groove 7 at the lower long side end of the first fixing plate 1, and the second fixing arm 28 is located in the second clamping groove 8 at the lower long side end of the second fixing plate 2, when the first fixing plate 1 and the second fixing plate 2 are fixed on the spinous process 43, or when the first clamping plate 23 and the second clamping plate 27 are separated from the first fixing plate 1 and the second fixing plate 2 respectively, the lower long side ends of the first fixing plate 1 and the second fixing plate 2 will contact the cervical spine, while the first fixing arm 24 and the second fixing arm 28 will not contact the cervical spine and generate resistance that would prevent the two fixing plates 1 and 2 from being fixed on the spinous process 43 or the two clamping plates 23 and 27 from being separated from the two fixing plates 1 and 2 respectively. For the first clamping plate 23, its lower end and the first fixing arm 24 located at the lower end are the parts closest to the cervical spine. If the lower end and the first fixing arm 24 located thereon do not contact the cervical spine, then other parts of the first clamping plate 23 will certainly not contact the cervical spine either. Similarly, for the second clamping plate 27, its lower end and the second fixing arm 28 located at the lower end are the parts closest to the cervical spine. If the lower end and the second fixing arm 28 located thereon do not contact the cervical spine, then other parts of the second clamping plate 27 will certainly not contact the cervical spine either. In summary, when the two clamping plates 23 and 27 are used to fix the two fixing plates 1 and 2 onto the spinous process 43 for fixation, or when the two clamping plates 23 and 27 are separated from the two fixing plates 1 and 2 after fixing the spinous process 43, the two clamping plates 23 and 27 can avoid contact with the cervical spine and thus avoid creating resistance that would hinder the relevant surgical procedures.

[0067] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0068] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0069] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A cervical spinous process fixation device, characterized in that: The device includes a first fixing plate and a second fixing plate arranged opposite to each other. Both the first fixing plate and the second fixing plate are strip-shaped plates. One long side of both the first fixing plate and the second fixing plate is concave inward in an arc shape, and the other long side of both the first fixing plate and the second fixing plate is convex in an arc shape outward. The first fixing plate has two first through holes spaced apart along its length, and the second fixing plate has two second through holes spaced apart along its length. The two first through holes and the two second through holes are arranged in a one-to-one correspondence. A locking rod is inserted between the first through hole and the corresponding second through hole. One end of the locking rod is engaged in the first through hole, and the other end of the locking rod is connected in the second through hole by a locking pin. Both the first fixing plate and the second fixing plate have pointed protrusions on their opposite sides. The side of the first fixing plate away from the second fixing plate has a first positioning protrusion, and the side of the second fixing plate away from the first fixing plate has a second positioning protrusion.

2. The cervical spinous process fixation device according to claim 1, characterized in that: The first through hole includes a hemispherical portion and a frustum-shaped portion that are interconnected. The hemispherical portion and the frustum-shaped portion are arranged sequentially along the direction from the first fixed plate to the second fixed plate. The hemispherical portion and the frustum-shaped portion are arranged coaxially. The diameter of the hemispherical portion gradually increases along the direction from the second fixed plate to the first fixed plate, and the diameter of the frustum-shaped portion gradually increases along the direction from the first fixed plate to the second fixed plate. The locking rod includes a head and a rod portion that are interconnected. The head is spherical and matches the hemispherical portion of the first through hole. The diameter of the hole where the hemispherical portion and the frustum-shaped portion connect is smaller than the outer diameter of the locking rod head and larger than the outer diameter of the rod portion. The rod portion of the locking rod passes through the hemispherical portion and the frustum-shaped portion of the first through hole in sequence and is inserted into the second through hole. The head of the locking rod is engaged in the hemispherical portion of the first through hole.

3. The cervical spinous process fixation device according to claim 2, characterized in that: There are two first positioning protrusions, both of which are semi-cylindrical. The axial direction of both first positioning protrusions is arranged along the width direction of the first fixing plate. Each of the two first positioning protrusions corresponds to one of the two first through holes, and each of the two first through holes passes through its corresponding first positioning protrusion. There are also two second positioning protrusions, both of which are semi-cylindrical. The axial direction of both second positioning protrusions is arranged along the width direction of the second fixing plate. Each of the two second positioning protrusions corresponds to one of the two second through holes, and each of the two second through holes passes through its corresponding second positioning protrusion.

4. The cervical spinous process fixation device according to claim 3, characterized in that: The second fixing plate has threaded holes at both of its second positioning protrusions. The threaded holes are arranged along the axial direction of the second positioning protrusions and communicate with the second through holes that pass through the second positioning protrusions. Locking pins are threaded into the threaded holes, and the locking pins in the two threaded holes abut against the locking rods in the two second through holes.

5. The cervical spinous process fixation device according to claim 4, characterized in that: The first fixing plate has a first clamping groove at each of its two long sides, and the second fixing plate has a second clamping groove at each of its two long sides.

6. An operating device, characterized in that: The device includes two operating levers arranged in a clamping shape. One end of each lever is a clamping end, and the other end is a gripping end. Each clamping end is connected to a clamping plate, which is a straight plate. The two clamping plates are designated as a first clamping plate and a second clamping plate, respectively. The first and second clamping plates are arranged opposite to each other. The side of the first clamping plate opposite to the second clamping plate has a first positioning groove, and the side of the second clamping plate opposite to the first clamping plate has a second positioning groove. The side of the first clamping plate opposite to the second clamping plate has a first fixed clamping arm and a first movable clamping arm. The first fixed clamping arm is... A first fixed clamping arm is slidably disposed on a first clamping plate. A first driving structure is provided on the first clamping plate, which can drive the first movable clamping arm to slide along the first clamping plate towards or away from the first fixed clamping arm. A second fixed clamping arm and a second movable clamping arm are provided on the side of the second clamping plate opposite to the first clamping plate. The second fixed clamping arm is fixedly disposed on the second clamping plate, and the second movable clamping arm is slidably disposed on the second clamping plate. A second driving structure is provided on the second clamping plate, which can drive the second movable clamping arm to slide along the second clamping plate towards or away from the second fixed clamping arm.

7. The operating device according to claim 6, characterized in that: The first clamping plate has a first strip groove on its side opposite to the second clamping plate. The first movable clamping arm is slidably disposed in the first strip groove. The first driving structure includes a first screw, which is rotatably mounted in the first strip groove. The axial direction of the first screw is the same as the length direction of the first strip groove. The first movable clamping arm is threadedly connected to the first screw. The first fixed clamping arm is fixedly disposed on the first clamping plate at one end of the first strip groove. The end of the first screw away from the first fixed clamping arm extends to the outside of the first clamping plate and is connected to the first rotating handle. The end of the first clamping plate with the first rotating handle is connected to the clamping end.

8. The operating device according to claim 7, characterized in that: The second clamping plate has a second strip-shaped groove on its side opposite to the first clamping plate. The second movable clamping arm is slidably disposed in the second strip-shaped groove. The second driving structure includes a second screw, which is rotatably mounted in the second strip-shaped groove. The axial direction of the second screw is the same as the length direction of the second strip-shaped groove. The second movable clamping arm is threadedly connected to the second screw. The second fixed clamping arm is fixedly disposed on the second clamping plate at one end of the second strip-shaped groove. The end of the second screw away from the second fixed clamping arm extends to the outside of the second clamping plate and is connected to the second rotating handle. The end of the second clamping plate with the second rotating handle is connected to the clamping end.

9. The operating device according to claim 8, characterized in that: The first positioning groove is a semi-cylindrical groove that penetrates the first clamping plate. The axial direction of the first positioning groove is the same as the axial direction of the first screw and the length direction of the first strip groove. There are two first positioning grooves, which are respectively located on opposite sides of the first strip groove. The second positioning groove is a semi-cylindrical groove that penetrates the second clamping plate. The axial direction of the second positioning groove is the same as the axial direction of the second screw and the length direction of the second strip groove. There are two second positioning grooves, which are respectively located on opposite sides of the second strip groove.

10. A cervical spinous process fixation system, characterized in that: The device includes the cervical spinous process fixation device according to any one of claims 1-5 and the operating device according to any one of claims 6-9. The first fixing plate is clamped between the first movable clamping arm and the first fixed clamping arm of the first clamping plate. The side of the first clamping plate opposite to the second clamping plate abuts against the side of the first fixing plate away from the second fixing plate. The first positioning protrusion is located in the first positioning groove. The second fixing plate is clamped between the second movable clamping arm and the second fixed clamping arm of the second clamping plate. The side of the second clamping plate opposite to the first clamping plate abuts against the side of the second fixing plate away from the first fixing plate. The second positioning protrusion is located in the second positioning groove.

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