Vertebral body reduction auxiliary tool for lumbar spondylolisthesis ULIF surgery
By designing a vertebral body reduction auxiliary tool for lumbar spondylosis ULIF surgical procedure that is adapted to percutaneous screws, the problem of easy percutaneous screws in the prior art is solved, high stability and safety during the operation are achieved, and operation risks are reduced.
Patent Information
- Application Number
- CN202421630669.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-10
AI Technical Summary
In existing slip-off vertebral reduction techniques, the mismatch between the percutaneous screw and the tool forceps leads to an increased risk of screw loss, increasing the risk and uncertainty of the surgery.
A vertebral reduction auxiliary tool for ULIF surgery for lumbar spondylosis is designed, including a connecting rod and a clamp arm that is hinged with each other. The size of the clamp arm is adapted to the slot of the percutaneous screw. Through the precise snapping of the clamp arm and the close cooperation of the bolt and nut, the firm clamping of the percutaneous screw is ensured.
Through the use of this tool, the risk of percutaneous screw slipping during the surgery is significantly reduced, the stability and safety of the surgery are improved, and the operational risk is reduced.
Smart Images
Figure CN223026127U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic surgical auxiliary instruments, in particular to a vertebral body reduction auxiliary tool for the ULIF operation of lumbar spondylolisthesis. Background Art
[0002] In the ULIF operation of the lumbar spine, the importance of reducing the spondylolisthetic vertebral body is self-evident. The spondylolisthetic vertebral body refers to the loss of stability between the lumbar vertebrae, resulting in the forward or backward displacement of one or more vertebral bodies relative to their adjacent vertebral bodies. This displacement not only causes abnormal lumbar spine structure, but may also compress the nerve roots or spinal cord, resulting in serious symptoms such as pain, numbness, and weakness. Therefore, in the ULIF operation, through precise operation, reducing the spondylolisthetic vertebral body to its normal position is a key step in restoring lumbar spine stability and relieving nerve compression. This can not only effectively relieve the pain symptoms of patients, but also improve the lumbar spine function and the quality of life of patients. At the same time, reducing the spondylolisthetic vertebral body also helps to improve the success rate of the fusion operation and reduce the occurrence of postoperative complications. Therefore, in the ULIF operation of the lumbar spine, reducing the spondylolisthetic vertebral body is a crucial link.
[0003] The existing spondylolisthetic vertebral body reduction techniques mainly rely on special percutaneous screws. By fixing the percutaneous screws on the spondylolisthetic vertebral body and then using a tool clamp to lift the percutaneous screws, the effective reduction of the spondylolisthetic vertebral body can be achieved.
[0004] However, since the percutaneous screws are special, the existing tool clamps do not fully fit the card slots of the percutaneous screws. During the lifting process, this mismatch may increase the risk of screw detachment, which undoubtedly increases the risk and uncertainty of the operation. Summary of the Invention
[0005] Aiming at the problem that the existing tool clamps do not match the percutaneous screws and are prone to the slippage of the percutaneous screws, the utility model provides a vertebral body reduction auxiliary tool for the ULIF operation of lumbar spondylolisthesis, which matches the percutaneous screws and is not prone to the slippage of the percutaneous screws.
[0006] To solve the above problems, the technical solution adopted by the present utility model is a vertebral body reduction assisting tool for lumbar spondylolisthesis ULIF surgery, which includes a first connecting rod and a second connecting rod that are hinged to each other. A first clamping arm is fixed to the lower end of the first connecting rod, and second clamping arms are fixed to the lower ends of the second connecting rod. The sizes of the first clamping arm and the second clamping arms are adapted to the card slots of the percutaneous screws to be clamped. The first connecting rod and the second connecting rod are connected in a hinged manner, so as to accurately control the first clamping arm and the second clamping arms to move closer to the inside. When the first clamping arm and the second clamping arms gradually approach, they can accurately be inserted into the card slots of the percutaneous screws to be clamped. Since the sizes of the first clamping arm and the second clamping arms are adapted to the card slots, they can be firmly inserted into the card slots, ensuring that the percutaneous screws to be clamped are not easily slipped during the operation, thereby improving the stability and safety of the surgery.
[0007] Preferably, the angle between the inner side surface and the top surface of the first clamping arm is a right angle, and the angle between the inner side surface and the top surface of the second clamping arm is also a right angle. The inner top parts of the first clamping arm and the second clamping arms are both designed with right-angle angles, enabling them to be tightly and stably clamped in the card slots of the percutaneous screws to be clamped, ensuring that they will not slip during the surgery, thereby improving the accuracy and safety of the surgery.
[0008] Preferably, the angles between the inner side surface and the bottom surface, between the outer side surface and the bottom surface, and between the outer side surface and the top surface of the first clamping arm are all rounded corners, and the angles between the inner side surface and the bottom surface, between the outer side surface and the bottom surface, and between the outer side surface and the top surface of the second clamping arm are also all rounded corners. Rounded corners are provided at the inner bottom parts, outer top parts, and outer bottom parts of the first clamping arm and the second clamping arms, which can effectively prevent the first clamping arm and the second clamping arms from accidentally injuring the human body during use, thereby ensuring the safety of the surgical process and the comfort of the patient.
[0009] Preferably, rounded corners are provided at the connection between the first clamping arm and the first connecting rod, and rounded corners are also provided at the connection between the second clamping arm and the second connecting rod. Rounded corners are provided at the connections between the first clamping arm and the first connecting rod, and between the second clamping arm and the second connecting rod, which not only improves the overall aesthetics of the instrument, but more importantly, can further prevent accidental injury to the human body during use, providing higher safety protection for the surgical operation.
[0010] Preferably, handles are provided at the upper ends of the first connecting rod and the second connecting rod. Handles are provided at the upper ends of the first connecting rod and the second connecting rod, improving the convenience of the doctor's operation.
[0011] Preferably, a fastening mechanism is provided at one end of the first connecting rod close to the handle. The fastening mechanism can relatively fix the first connecting rod and the second connecting rod.
[0012] Preferably, the fastening mechanism includes a slide plate 1 and a slide plate 2, wherein the slide plate 1 is fixed on the inner side of the connecting rod 1, a slide plate 1 is provided on the slide plate 2, a slide plate 2 is provided on the slide plate 2, a bolt is installed in the slide plate 2, the screw rod of the bolt passes through the slide plate 1 and the slide plate 2, and the screw rod of the bolt can slide in the slide plate 1 and the slide plate 2, and a nut is installed on the bolt, and the nut can fix the slide plate 1 and the slide plate 2 together. During the clamping process, the slide plate 1 and the slide plate 2 will slide relative to each other, and the screw rod of the bolt will slide smoothly in the slide plate 1 and the slide plate 2. Once the percutaneous screw is clamped, by rotating the nut, the nut and the bolt are closely matched, and the slide plate 1 and the slide plate 2 are firmly clamped and fixed, so that the connecting plate 1 and the connecting plate 2 are relatively fixed, thereby effectively avoiding the percutaneous screw from falling off due to hand slip or other unexpected situations during the lifting process, thereby ensuring the safety and success rate of the surgical operation.
[0013] Preferably, both the first and second slide grooves are arc-shaped, the center of the arc coincides with the hinge of the first and second connecting rods, and the radius of the first and second slide grooves is the same. Both the first and second slide grooves are arc-shaped, the center of the arc coincides with the hinge of the first and second connecting rods, and the radius of the two are consistent. This ensures that during the clamping process, the screw of the bolt can always smoothly pass through the first and second slide grooves, thereby achieving a stable and reliable clamping function, effectively avoiding the deviation or jamming of the screw during the sliding process, and improving the accuracy and safety of the operation.
[0014] It can be seen from the above technical solutions that the advantages of the utility model are: connecting rod one and connecting rod two are connected in a mutually hinged manner, so that clamp arm one and clamp arm two can be accurately moved inward. When the two gradually approach, clamp arm one and clamp arm two can be embedded in the slot of the percutaneous screw to be clamped, and their adaptability ensures a stable clamping effect. In addition, the close cooperation between the bolt and the nut not only enhances the stability of the clamping, but also enables connecting rod one and connecting rod two to be firmly locked, effectively preventing accidental opening. In summary, this tool not only achieves a stable support for the percutaneous screw, but also ensures high stability and safety during the operation through the locking mechanism of the bolt and nut, greatly reducing the operational risk. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 The structure of the specific implementation method of the utility model is shown in FIG. Figure 1 .
[0017] Figure 2 is Figure 1 The partial enlarged view at position A in
[0018] Figure 3 is Figure 1 The partial enlarged view at position B in
[0019] Figure 4 is the structural schematic diagram of the percutaneous screw in the specific implementation manner of the present utility model.
[0020] Figure 5 is the structural schematic of the specific implementation manner of the present utility model Figure 2 .
[0021] Figure 6 is Figure 5 The partial enlarged view at position C in
[0022] Description of Main Reference Numerals
[0023] In the figure: 1. First connecting rod, 11. First clamping arm, 12. First sliding plate, 13. First sliding groove, 2. Second connecting rod, 21. Second clamping arm, 22. Second sliding plate, 23. Second sliding groove, 3. Handle, 4. Bolt, 5. Right angle, 6. Percutaneous screw, 61. Card slot, 7. Rounded corner. Specific Implementation Manner
[0024] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present utility model. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.
[0025] A vertebral body reduction assist tool for the ULIF surgical procedure for lumbar spondylolisthesis, as Figure 1 shown, includes a first connecting rod 1 and a second connecting rod 2, and the first connecting rod 1 and the second connecting rod 2 are connected by a hinge shaft. One end of the hinge shaft is located at the middle position of the first connecting rod 1, and the other end is located at the middle position of the second connecting rod 2. A first clamping arm 11 is fixed to the lower end of the first connecting rod 1, and the first clamping arm 11 and the first connecting rod 1 are integrally processed. Second clamping arms 21 are fixed to the lower ends of the second connecting rod 2, and the second clamping arms 21 and the second connecting rod 2 are also integrally processed. In addition, the sizes of the first clamping arm 11 and the second clamping arm 21 are adapted to the card slot 61 of the percutaneous screw 6 to be clamped.
[0026] As Figure 3As shown, in this specific embodiment, the first clamping arm 11 and the second clamping arm 21 are specifically structured as follows: A fillet 7 is provided at the connection between the first clamping arm 11 and the first connecting rod 1, as Figure 5 , 6 shown. A fillet 7 is also provided at the connection between the second clamping arm 21 and the second connecting rod 2. The cross-sections of both the first clamping arm 11 and the second clamping arm 21 are fillet rectangles. The angle between the inner side surface and the top surface of the first clamping arm 11 is a right angle 5. The angles between the inner side surface and the bottom surface, between the outer side surface and the bottom surface, and between the outer side surface and the top surface of the first clamping arm 11 are all fillets 7. The angle between the inner side surface and the top surface of the second clamping arm 21 is a right angle 5. The angles between the inner side surface and the bottom surface, between the outer side surface and the bottom surface, and between the outer side surface and the top surface of the second clamping arm 21 are all fillets 7. The fillets 7 can prevent the first clamping arm 11 and the second clamping arm 21 from causing damage to the human body during the process of entering the human body.
[0027] As Figure 2 shown, handles 3 are provided at the upper ends of both the first connecting rod 1 and the second connecting rod 2. In this embodiment, the first connecting rod 1 and the handle 3 are integrally processed, and the second connecting rod 2 and the handle 3 are also integrally processed. A fastening mechanism is provided at one end of the first connecting rod 1 close to the handle 3. The fastening mechanism includes a first sliding plate 12 and a second sliding plate 22. The first sliding plate 12 is fixed to the inner side of the first connecting rod 1 and is integrally processed with the first connecting rod 1. The second sliding plate 22 is fixed to the inner side of the second connecting rod 2 and is also integrally processed with the second connecting plate. A first sliding groove 13 is provided on the first sliding plate 12, and a second sliding groove 23 is provided on the second sliding plate 22. Both the first sliding groove 13 and the second sliding groove 23 are arc-shaped. The center of the arc coincides with the center of the hinge shaft, and the radii of the first sliding groove 13 and the second sliding groove 23 are the same. A bolt 4 is installed in the second sliding groove 23. The screw of the bolt 4 passes through the first sliding groove 13 and the second sliding groove 23, and the screw of the bolt 4 can slide in the first sliding groove 13 and the second sliding groove 23. A nut is installed on the bolt 4. The nut is installed on the screw of the bolt 4. The first sliding plate 12 and the second sliding plate 22 are between the bolt 4 and the nut. The nut cooperates with the bolt 4 to fix the first sliding plate 12 and the second sliding plate 22 together.
[0028] The specific use process of this utility model is as follows: First, loosen the nut appropriately to allow relative movement between the first connecting plate and the second connecting plate. Subsequently, accurately insert the first clamping arm 11 and the second clamping arm 21 into the human body to find and locate the exact position of the percutaneous screw 6. Once found, operate the handle 3 to control the first clamping arm 11 and the second clamping arm 21 to gradually approach and firmly engage into the card slot 61 of the percutaneous screw 6. As Figure 4As shown, after confirming that the clamping is correct, immediately tighten the nut to ensure stable connection. At this time, the percutaneous screw 6 can be easily lifted by the handle 3. When the lifting is no longer needed, loosen the nut again, and manipulate the first clamping arm 11 and the second clamping arm 21 to withdraw from the card slot 61 through the handle 3, and finally safely remove the first clamping arm 11 and the second clamping arm 21 from the human body.
[0029] It can be seen from the above embodiments that the beneficial effects of the present utility model are as follows: The first connecting rod and the second connecting rod are connected in a hinged manner, enabling the first clamping arm and the second clamping arm to accurately approach each other inwardly. When the two gradually approach, the first clamping arm and the second clamping arm can be inserted into the card slot of the percutaneous screw to be clamped, and their adaptability ensures a stable clamping effect. In addition, the close cooperation between the bolt and the nut not only enhances the firmness of the clamping, but also enables the first connecting rod and the second connecting rod to be firmly locked, effectively preventing accidental opening. To sum up, this tool not only realizes the stable clamping of the percutaneous screw, but also ensures high stability and safety during the operation through the locking mechanism of the bolt and the nut, greatly reducing the operation risk.
[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis, characterized in that: The invention comprises a connecting rod 1 (1) and a connecting rod 2 (2) which are hinged to each other. A clamp arm 1 (11) is fixed to the lower end of the connecting rod 1 (1), and a clamp arm 2 (21) is fixed to the lower end of the connecting rod 2 (2). The sizes of the clamp arm 1 (11) and the clamp arm 2 (21) are adapted to the clamping groove (61) of the percutaneous screw (6) to be clamped.
2. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 1, characterized in that: The angle between the inner side surface and the top surface of the first clamp arm (11) is a right angle (5), and the angle between the inner side surface and the top surface of the second clamp arm (21) is also a right angle (5).
3. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 1, characterized in that: The angles between the inner side surface and the bottom surface, the angles between the outer side surface and the bottom surface, and the angles between the outer side surface and the top surface of the first clamp arm (11) are all rounded corners (7), and the angles between the inner side surface and the bottom surface, the angles between the outer side surface and the bottom surface, and the angles between the outer side surface and the top surface of the second clamp arm (21) are also all rounded corners (7).
4. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 1, characterized in that: A rounded corner (7) is provided at the connection between the first clamp arm (11) and the first connecting rod (1), and a rounded corner (7) is also provided at the connection between the second clamp arm (21) and the second connecting rod (2).
5. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 1, characterized in that: The upper ends of the connecting rod 1 (1) and the connecting rod 2 (2) are both provided with handles (3).
6. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 5, characterized in that: A fastening mechanism is provided at one end of the connecting rod 1 (1) close to the handle (3).
7. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 6, characterized in that: The fastening mechanism comprises a slide plate 1 (12) and a slide plate 2 (22), wherein the slide plate 1 (12) is fixed on the inner side of the connecting rod 1 (1), and a slide groove 1 (13) is arranged on the slide plate 1 (12), and the slide plate 2 (22) is fixed on the inner side of the connecting rod 2 (2), and a slide groove 2 (23) is arranged on the slide plate 2 (22), and a bolt (4) is installed in the slide groove 2 (23), and the screw rod of the bolt (4) passes through the slide groove 1 (13) and the slide groove 2 (23), and the screw rod of the bolt (4) can slide in the slide groove 1 (13) and the slide groove 2 (23), and a nut is installed on the bolt (4), and the nut can fix the slide plate 1 (12) and the slide plate 2 (22) together.
8. The vertebral body reduction auxiliary tool for ULIF procedure of lumbar spondylolisthesis according to claim 7, characterized in that: The first slide groove (13) and the second slide groove (23) are both arc-shaped, the center of the arc coincides with the hinge of the first connecting rod (1) and the second connecting rod (2), and the radius of the first slide groove (13) and the second slide groove (23) are the same.