Orthopedic cannulated screw insertion aiming device

Abstract

This utility model discloses an orthopedic hollow screw insertion aiming device, including a positioning bracket and an aiming mechanism. The positioning bracket includes a base, a vertical rod, and a locking rod assembly. The bottom end of the vertical rod is fixed to the base, and the locking rod assembly is installed on the upper part. The aiming mechanism includes an aiming honeycomb head connected to the front end of a universal adapter, and the rear end of the universal adapter is connected to the locking rod assembly. The aiming honeycomb head is composed of multiple capillary tubes arranged in a matrix. During surgery, this device is placed on the operating table beside the patient's fracture site. Its height can be adjusted vertically, and the aiming honeycomb head can rotate. Under imaging, the screw is precisely inserted into the selected steel tube of the aiming honeycomb head.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary devices, and in particular to an orthopedic hollow screw insertion aiming device. Background Technology

[0002] In the treatment of femoral neck fractures, parallel cannulated screw fixation is considered a widely used and effective method. Inappropriate screw placement and arrangement can significantly impact surgical outcomes, potentially leading to nonunion and internal fixation failure. Achieving parallel and precise screw placement is often challenging, frequently requiring multiple attempts. This not only prolongs the surgical procedure but can also create multiple bone tunnels due to repeated attempts, increasing surgical trauma, postoperative nonunion, and the risk of femoral head necrosis. More importantly, repeated attempts and procedures mean prolonged radiation exposure for both patients and surgical personnel, undoubtedly increasing their likelihood of potential health risks.

[0003] The inventor designed an aiming device in clinical practice. First, an auxiliary Kirschner wire is inserted into the lateral aspect of the femur distal to the fracture site. Then, the aiming honeycomb head, composed of multiple capillaries, is adjusted to align with the fracture site. Under C-arm irradiation, the Kirschner wire is precisely inserted through the specific channel of the aiming honeycomb head, and then a hollow screw is accurately inserted. However, this device caused unnecessary invasiveness to the patient. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an orthopedic hollow screw placement aiming device. During the operation, the device is placed on the operating table next to the patient's fracture site. The height can be adjusted up and down, and the aiming honeycomb head can be rotated. Under imaging, the device positions the Kirschner wire from the selected capillary of the aiming honeycomb head and then inserts the hollow screw, ensuring precise screw placement.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An orthopedic hollow screw insertion aiming device includes a positioning bracket and an aiming mechanism. The positioning bracket includes a base, a vertical rod, and a locking rod assembly. The bottom end of the vertical rod is fixed on the base, and the upper part is equipped with the locking rod assembly. The aiming mechanism includes an aiming honeycomb head connected to the front end of a universal adapter, and the rear end of the universal adapter is connected to the locking rod assembly. The aiming honeycomb head is composed of multiple capillary matrix arrangements.

[0007] A further improvement is that the locking rod assembly includes a locking rod cylinder and a locking rod bolt. A threaded hole is formed in the wall of the locking rod cylinder, and the locking rod bolt is screwed into the threaded hole, with its front end abutting against the circumferential wall of the vertical rod inserted inside the locking rod cylinder. The height of the locking rod cylinder on the vertical rod can be adjusted, simultaneously adjusting the height of the aiming honeycomb head.

[0008] A further improvement is that the universal adapter includes a universal ball, a universal ball seat, and a ball head rod. The rear end of the universal ball seat is connected to the outer wall of the locking rod cylinder, the universal ball is movably connected to the front end of the universal ball seat, the rear end of the ball head rod is fixed to the universal ball, and the front end is connected to the aiming honeycomb head.

[0009] A further improvement is that a threaded rod is fixedly connected to the outer wall of the locking rod cylinder, and a nut is fixedly connected to the rear end of the universal ball seat. The nut connects to the threaded rod to fix the universal adapter to the locking rod assembly. A connecting cylinder is fixedly connected to the front end of the ball head rod, and the connecting cylinder has internal threads. A threaded rod is fixedly connected to the aiming honeycomb head, and the threaded rod connects to the connecting cylinder to fix the aiming honeycomb head to the universal adapter. This facilitates the assembly and disassembly of the device.

[0010] A further improvement is to fix a rod assembly to the base. The rod assembly includes a rod cylinder and a rod bolt vertically attached to the base. The rod cylinder has a threaded hole in its wall, and the rod bolt is screwed into the threaded hole, with its front end abutting against the circumferential wall of the vertical rod inserted into the rod cylinder. This facilitates the assembly and disassembly of the device.

[0011] In a further improved design, the locking bolt and fixing bolt are wing bolts, making them easier to tighten and loosen.

[0012] In a further improved design, the end face of the aiming honeycomb head is rhomboid, and one corner of the aiming honeycomb head is connected to the universal adapter.

[0013] A further improvement is that the vertical rod is made of carbon fiber. It will not develop during fluoroscopy. Beneficial effects

[0014] This device is placed on the operating table beside the patient's fracture site. The base is stable, and the locking rod assembly is height-adjustable and fixed. The universal adapter allows for adjustment of the aiming honeycomb head's position and angle. Under C-arm fluoroscopy, the aiming honeycomb head is aligned with the bone fracture location. The screw is then precisely inserted into the selected capillary tube. There is no need to insert auxiliary positioning Kirschner wires on the side of the patient's femur, avoiding secondary trauma. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a disassembly diagram of the present invention;

[0017] Figure 3 A 3D diagram for aiming at the honeycomb head;

[0018] Figure 4 This is a schematic diagram of the steel needle and locking pin assembly. Detailed Implementation

[0019] like Figures 1 to 3As shown, this utility model includes a positioning bracket and an aiming mechanism. The positioning bracket includes a thickened circular plate base 1, a vertical rod 2, a locking rod assembly 3, and a fixing rod assembly 6. The fixing rod assembly includes a fixing rod bolt 62 and a fixing rod cylinder 61 vertically welded to the base. The fixing rod cylinder 61 has a threaded hole on its wall, and the fixing rod bolt 62 is screwed into the threaded hole. Its front end abuts against the circumferential wall of the vertical rod 2, which is inserted into the fixing rod cylinder, for fixation. The locking rod assembly 3 includes a locking rod cylinder 31, a locking rod bolt 32, and a threaded rod 33. The locking rod cylinder 31 is fitted onto the upper part of the vertical rod 2 and can move up and down to select a position. The locking rod cylinder 31 has a threaded hole on its wall, and the locking rod bolt 32 is screwed into the threaded hole. Its front end abuts against the circumferential wall of the vertical rod 2, which is inserted into the locking rod cylinder, so that the locking rod cylinder 31 is fixed. The threaded rod 33 is welded to the outer wall of the locking rod cylinder 31.

[0020] The aiming mechanism includes an aiming honeycomb head 5 connected to a universal adapter 4. The aiming honeycomb head 5 is composed of multiple capillary stainless steel tubes arranged in a matrix. The rear end of the universal adapter 4 is connected to a locking rod assembly 3. Specifically, the universal adapter 4 includes a universal ball 41, a universal ball seat 42, a ball head rod 43, a connecting cylinder 44, and a nut 45. The nut 5 is welded to the rear end of the universal ball seat. The nut 45 is connected to a threaded rod 33 to fix the universal adapter 4 to the outer wall of the locking rod cylinder 31. The universal ball 41 is movably connected to the front end of the universal ball seat 42. The rear end of the ball head rod 43 is fixed to the universal ball 41, and the front end is welded to the connecting cylinder 44. The connecting cylinder 44 has internal threads. A threaded rod 51 is fixed to the aiming honeycomb head 5. The threaded rod 51 is connected to the connecting cylinder 44 to fix the aiming honeycomb head 5 to the universal adapter 4. The aiming honeycomb head 5 can change its angle by rotating the universal ball 41.

[0021] The locking bolt 32 and the fixing bolt 62 are wing bolts.

[0022] The end face of the aiming honeycomb head 5 is diamond-shaped, and one corner of the aiming honeycomb head 5 is connected to the universal adapter 4.

[0023] This device can also be adapted for other surgeries by replacing the aiming honeycomb head 5 with a locking pin assembly 7 for securing the steel pin 8 for clinical use, such as... Figure 4 As shown, this technique is suitable for pelvic partial channel screw placement surgery.

[0024] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An orthopedic cannulated screw insertion aiming device, characterized in that: The device includes a positioning bracket and an aiming mechanism. The positioning bracket includes a base (1), a vertical rod (2), and a locking rod assembly (3). The bottom end of the vertical rod (2) is fixed on the base (1), and the upper part is equipped with the locking rod assembly (3). The aiming mechanism includes an aiming honeycomb head (5) connected to the front end of a universal adapter (4), and the rear end of the universal adapter (4) is connected to the locking rod assembly (3). The aiming honeycomb head (5) is composed of multiple capillary matrix arrangements.

2. The orthopedic cannulated screw insertion aiming device according to claim 1, characterized in that: The locking rod assembly (3) includes a locking rod cylinder (31) and a locking rod bolt (32). The locking rod cylinder (31) has a threaded hole on its wall, and the locking rod bolt (32) is screwed into the threaded hole, with its front end abutting against the circumferential wall of the vertical rod (2) inserted into the locking rod cylinder.

3. The orthopedic cannulated screw insertion aiming device according to claim 2, characterized in that: The universal adapter (4) includes a universal ball (41), a universal ball seat (42), and a ball head rod (43). The rear end of the universal ball seat is connected to the outer wall of the locking cylinder (31). The universal ball (41) is movably connected to the front end of the universal ball seat (42). The rear end of the ball head rod (43) is fixed to the universal ball (41), and the front end is connected to the aiming honeycomb head (5).

4. The orthopedic cannulated screw insertion aiming device according to claim 3, characterized in that: A threaded rod (33) is fixed to the outer wall of the locking rod cylinder (31), and a nut (45) is fixed to the rear end of the universal ball seat (42). The nut (45) is connected to the threaded rod (33) to fix the universal adapter (4) on the locking rod assembly (3). A connecting cylinder (44) is fixed to the front end of the ball head rod (43). The connecting cylinder (44) is threaded. A threaded rod (51) is fixed to the aiming honeycomb head (5). The threaded rod (51) is connected to the connecting cylinder (44) to fix the aiming honeycomb head (5) on the universal adapter (4).

5. The orthopedic cannulated screw insertion aiming device according to claim 1, wherein: The base (1) is fixedly connected to the rod assembly (6). The rod assembly (6) includes a rod cylinder (61) and a rod bolt (62) that are vertically connected to the base. The rod cylinder (61) has a threaded hole on its wall. The rod bolt (62) is screwed into the threaded hole and its front end abuts against the circumferential wall of the vertical rod (2) that is inserted into the rod cylinder.

6. The orthopedic cannulated screw insertion aiming device according to claim 1, characterized in that: The end face of the aiming honeycomb head (5) is rhomboid, and one corner of the aiming honeycomb head (5) is connected to the universal adapter (4).

7. The orthopedic cannulated screw aiming device according to claim 1, wherein: The vertical rod (2) is a carbon fiber rod.

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