Vertebral fracture repositor
By designing a vertebral fracture reduction device with a retractable telescopic plate and an eccentric wheel mechanism, the problem that existing reduction devices cannot completely cover the fracture site has been solved, enabling efficient and minimally invasive fracture reduction in UBE surgery, reducing medical costs and recovery time.
Patent Information
- Application Number
- CN202422606384.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Existing reduction devices cannot completely cover the fracture site during UBE surgery, resulting in unsatisfactory surgical outcomes and requiring larger surgical openings, which contradicts the principles of minimally invasive surgery.
A vertebral fracture reduction device was designed, comprising an end, a rod, and an adjustment section. The end has a retractable telescopic plate, which is adjusted by an eccentric wheel and a linkage mechanism to adapt to different fracture ranges.
It improves the adaptability and flexibility of surgery, ensures that the reduction device fits closely to the fracture site, reduces surgical trauma and bleeding risk, lowers medical costs, and shortens recovery time.
Smart Images
Figure CN223614915U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a vertebral fracture reduction device. Background Technology
[0002] In the case of a burst fracture of the vertebral body, the posteriorly displaced bone fragment may protrude into the spinal canal and compress the spinal cord. Surgical repositioning of the displaced bone fragment is necessary to relieve the compression on the spinal cord or nerve roots within the spinal canal. Specifically, an L-shaped repositioning device can be inserted from the side of the dural sac into the anterior side of the dural sac, with the L-shaped bottom surface of the repositioning device pressing against the protruding bone fragment. The top of the repositioning device is then struck to force the protruding bone fragment to reposition.
[0003] Unilateral biportal endoscopy (UBE) is a minimally invasive spinal endoscopic surgery performed on the same side of the spine through two channels. It is a modified technique that offers a clear and wide surgical field, minimal trauma, less bleeding, and faster recovery. In recent years, it has been widely used by scholars both domestically and internationally to treat various spinal diseases. It also allows for decompression using conventional spinal surgical instruments, providing convenience for primary healthcare institutions whose development is limited by expensive medical equipment, thus accelerating the clinical application of this technique. However, the narrow channels created in UBE surgery mean that if the fracture is large, a reduction device that meets the channel diameter may not completely cover the fracture site, leading to unsatisfactory surgical results. Using a larger reduction device would require enlarging the surgical opening, which contradicts the principles of minimally invasive surgery. Therefore, there is a need for a reduction device that can treat various fracture ranges during UBE surgery without enlarging the surgical opening. Utility Model Content
[0004] The purpose of this invention is to provide a vertebral fracture reduction device to solve the problem that existing reduction devices cannot completely cover the fracture site after reaching the fracture site, resulting in unsatisfactory surgical results.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0006] A vertebral fracture reduction device includes: an end portion, a rod portion, and an adjustment portion connected in sequence. The end portion has a plate-like structure perpendicular to the rod portion and a telescopic plate. The rod portion has a control mechanism for controlling the extension and retraction of the telescopic plate. The adjustment portion controls the movement of the control mechanism to make the telescopic plate slide back and forth within the end portion.
[0007] Furthermore, a slot is provided at the end, and the telescopic piece slides back and forth within the slot at the end.
[0008] Furthermore, the control mechanism includes an eccentric wheel and a connecting rod, with one end of the connecting rod connected to the edge of the eccentric wheel and the other end connected to the telescopic plate.
[0009] Furthermore, the rod includes an inner rod, the end of which is embedded in an adjusting part, and an eccentric wheel is sleeved on the front end of the inner rod.
[0010] Furthermore, the rod also includes an outer rod, which is sleeved outside the inner rod, and the front end of the outer rod is connected to the end slot.
[0011] Furthermore, the rear end of the inner rod is provided with rod serrations along the axial direction, and the adjustment part is provided with adjustment part serrations, with the rod serrations meshing with the adjustment part serrations.
[0012] Furthermore, a spring is fitted at the end of the outer rod, and a retaining ring is provided inside the adjusting part. The spring is located between the inner surface of the adjusting part and the retaining ring.
[0013] This utility model has the following beneficial effects:
[0014] Improving surgical adaptability and flexibility: By incorporating a retractable flap on the L-shaped end face of the reducer, the device can be adjusted to suit the fracture extent and specific circumstances of different patients. This design allows the reducer to fit more closely to the fracture site, improving surgical precision and outcome. The retractable flap design allows surgeons to make real-time adjustments during surgery as needed without replacing the entire reducer, thus enhancing surgical flexibility and efficiency.
[0015] Optimized surgical procedure: This reduction device can easily pass through narrow surgical channels to reach the fracture site during UBE surgery. Once reached, the surgeon can easily adjust the position and extension length of the telescopic flap using the adjustment mechanism to accommodate different fracture extents. After reduction, the device can also be used as a nerve retractor, eliminating the need to remove and reinsert other instruments, thus saving surgical time and reducing surgical trauma and bleeding risks.
[0016] Enhancing surgical outcomes and safety: Because the telescopic flap fits snugly against the fracture site, this reduction device can more effectively reposition displaced bone fragments, reducing compression on the spinal cord or nerve roots within the spinal canal, thereby improving patient prognosis. Furthermore, the device's design reduces the risk of damage to surrounding tissues during surgery, improving overall surgical safety.
[0017] Reduced medical costs: This repositioning device uses conventional spinal surgery instruments for decompression, eliminating the need for expensive medical equipment and thus reducing treatment costs for patients. Simultaneously, the shortened operation time and reduced surgical trauma lead to a shorter postoperative recovery period, further reducing medical costs and the social burden. Attached Figure Description
[0018] Figure 1 This is a structural diagram of the resetter;
[0019] Figure 2 This is a cross-sectional view of the reset device;
[0020] Figure 3 This is a magnified view of the serrations at the end of the outer tube.
[0021] Figure 4 The internal structure of the regulating section;
[0022] Figure 5 This is a diagram showing the connection structure of the eccentric wheel, connecting rod, and telescopic plate at the front end of the inner rod.
[0023] Figures 1 to 5 The reference numerals in the attached drawings are respectively: end 1, telescopic plate 11, rod 2, inner rod 21, outer rod 22, eccentric wheel 23, connecting rod 24, rod serration 25, spring 26, adjusting part 3, adjusting part serration 31, and retaining ring 32. Detailed Implementation
[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] Please refer to Figure 1 This embodiment provides a vertebral fracture reduction device, particularly suitable for treating vertebral burst fractures during unilateral dual-channel spinal endoscopic surgery (UBE). This device is ingeniously designed and can effectively address various fracture extents without increasing the surgical opening, improving surgical efficiency and success rate. The following is a detailed description of the specific implementation of this embodiment.
[0026] The vertebral fracture reduction device of this embodiment mainly comprises three parts: end portion 1, rod portion 2, and adjustment portion 3. Among them, end portion 1 is the part of the reduction device that directly contacts the fracture site, and its design is crucial to the surgical outcome. End portion 1 has a plate-like structure perpendicular to rod portion 2. This design allows the reduction device to be more easily inserted into narrow surgical channels and closely conform to the fracture site.
[0027] At end 1, a slot and a telescopic plate 11 are provided. The slot is the track for the telescopic plate 11 to slide, ensuring the stability and accuracy of the telescopic plate 11 during extension and retraction. The telescopic plate 11 can slide back and forth within the slot to adjust the contact area with bone tissue. This design allows the reduction device to be flexibly adjusted according to different fracture extents, ensuring surgical outcomes.
[0028] The material of the telescopic plate 11 should have a certain degree of hardness and toughness to ensure that it can stably push the fracture site to reduction under force without damaging surrounding tissues. In practice, the telescopic plate 11 can be made of metal materials such as stainless steel and titanium alloy, or it can be made of new materials such as polymer composite materials to meet different surgical needs.
[0029] The rod 2 serves as a bridge connecting the end 1 and the adjustment part 3, and its design should ensure the stability and operability of the repositioning device during surgery. Specifically, the rod 2 comprises an inner rod 21 and an outer rod 22. The inner rod 21 is the core part of the repositioning device, and an eccentric wheel 23 is fitted at its front end. The design of the eccentric wheel 23 allows the connecting rod 24 to connect to its edge position, and the extension and retraction of the connecting rod 24 and the telescopic plate 11 are driven by rotating the eccentric wheel 23.
[0030] The connecting rod 24 is a key component connecting the eccentric wheel 23 and the telescopic plate 11. Its design should ensure that the telescopic plate 11 can be stably pushed to slide within the slot when the eccentric wheel 23 rotates. In practice, the connecting rod 24 can be made of high-strength stainless steel to ensure its stability and durability during use.
[0031] The outer rod 22 is sleeved over the inner rod 21, with its front end connected to the slot of the end 1, and its rear end having a ring of serrated teeth 25 along the axial direction. The serrated teeth 25 engage with the serrated teeth 31 of the adjusting part 3 to fix the position of the inner rod 21 and the telescopic piece 11. This design allows the repositioning device to remain stable during surgery and prevents it from moving or deforming due to external forces.
[0032] The adjustment unit 3 is the control part of the reduction device in this embodiment. Its design should ensure that the doctor can easily adjust the position and state of the telescopic plate 11. The adjustment unit 3 is connected to the rod 2, and the reduction operation of the fracture site is achieved by controlling the rotation of the inner rod 21 and the sliding of the telescopic plate 11.
[0033] Reference Figure 3-5 Within the adjustment section 3, there is a ring of serrated teeth 31 that meshes with the serrated teeth 25 of the rod. When the doctor needs to adjust the position of the telescopic plate 11, they simply lift the adjustment section 3 upwards to separate the two rings of serrated teeth, unlocking the inner rod 21. Then, while maintaining the lifted position, rotating the adjustment section 3 will rotate the inner rod 21. Through the action of the eccentric wheel 23 and the connecting rod 24, the telescopic plate 11 will be pushed out or retracted to adjust the contact area with the fracture site.
[0034] To ensure the stability and operability of the adjustment unit 3 during surgery, its material and design should possess sufficient strength and rigidity. In practice, the adjustment unit 3 can be made of lightweight materials such as high-strength plastics or aluminum alloys to reduce the surgeon's workload. Additionally, the surface of the adjustment unit 3 can be designed with anti-slip textures or grips to improve the surgeon's comfort and accuracy.
[0035] In addition, refer to Figure 2 The adjustment section 3 also includes a retaining ring 32 and a spring 26. The spring 26 is located between the inner surface of the adjustment section 3 and the retaining ring 32, and is used to automatically engage the two rings of serrations after the adjustment section 3 is released, thereby fixing the position of the telescopic piece 11. This design allows doctors to more easily adjust the position of the telescopic piece 11 during surgery and ensures its stability.
[0036] In practical implementation, the vertebral fracture reduction device of this embodiment can be used according to the following steps:
[0037] First, the surgeon needs to accurately locate the fracture site within the UBE surgical channel and insert the reduction device through the channel to the vicinity of the fracture site. During this process, the telescopic plate 11 should be in the retracted state to ensure that the reduction device can pass smoothly through the narrow surgical channel.
[0038] Once the reduction device reaches the fracture site, the doctor needs to adjust the position of the telescopic plate 11 according to the size of the fracture. At this time, the doctor can lift the adjustment part 3 upwards to separate the two serrations and unlock the inner rod 21. Then, while maintaining the lifted position, rotate the adjustment part 3 to push the telescopic plate 11 out through the action of the eccentric wheel 23 and the connecting rod 24, thereby expanding the contact surface between the end and the fracture site.
[0039] When adjusting the position of the telescopic plate 11, the doctor needs to carefully observe the fracture site in the surgical field and make fine adjustments as needed. Once the telescopic plate 11 is in close contact with the fracture site, the doctor can release the adjustment part 3. At this time, the spring 26 will automatically engage the two rings of serrations, thereby fixing the position of the telescopic plate 11.
[0040] Next, the surgeon can use a reduction device to reposition the fracture. By striking the top of the device or using other surgical instruments, the displaced bone fragment is repositioned to the correct location. Throughout this process, the surgeon needs to continuously monitor the surgical field and make adjustments as needed.
[0041] After repositioning, the repositioning device in this embodiment can also be used as a nerve retractor, eliminating the need to remove the instrument and reinsert the nerve retractor. This not only saves surgical time but also reduces the risk of trauma and bleeding during the procedure. In practice, the surgeon can adjust the position and angle of the repositioning device according to the surgical needs to better expose the surgical field and protect surrounding tissues.
[0042] Furthermore, the vertebral fracture reduction device of this embodiment also has the following advantages:
[0043] Wide applicability: By adjusting the position and state of the telescopic plate 11, this embodiment can address various fracture extents and treatment needs. This allows surgeons to more easily select the appropriate reduction device model and specifications during surgery, thereby improving surgical efficiency and success rate.
[0044] Easy to operate: The resetter in this embodiment is designed to be simple and straightforward, and easy and quick to operate. The doctor only needs to rotate the adjustment part 3 to adjust the position and state of the telescopic plate 11, without requiring complicated operating steps or skills. This allows the doctor to focus more on the surgical procedure itself, improving surgical quality and safety.
[0045] Minimal trauma and rapid recovery: Because this embodiment uses minimally invasive techniques, the surgical trauma is small, bleeding is minimal, and recovery is rapid. This means less pain and a faster recovery time for patients. It also reduces surgical risks and the incidence of complications.
[0046] Significant economic benefits: The repositioning device in this embodiment uses conventional spinal surgery instruments for decompression, eliminating the need for expensive medical equipment. This enables primary healthcare institutions to perform minimally invasive spinal endoscopic surgeries such as UBE, thereby reducing treatment costs for patients and the social healthcare burden.
[0047] In summary, the vertebral fracture reduction device of this embodiment has broad application prospects and market value. Through reasonable structural design and functional configuration, this reduction device can effectively treat vertebral burst fractures during UBE surgery, improving surgical efficiency and success rate, and reducing treatment costs for patients and the social medical burden. At the same time, this reduction device also has advantages such as simple operation, minimal trauma, and rapid recovery, bringing better treatment results and rehabilitation experience to patients.
[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A vertebral fracture reduction device, characterized in that, include: The end (1), rod (2) and adjustment part (3) are connected in sequence. The end (1) has a plate-like structure perpendicular to the rod (2). The end (1) is provided with a telescopic piece (11). The rod (2) is provided with a control mechanism to control the telescopic piece (11) to extend and retract. The adjustment part (3) controls the movement of the control mechanism to make the telescopic piece (11) slide back and forth in the end (1).
2. The vertebral fracture reduction device according to claim 1, characterized in that, The end (1) is provided with a slot, and the telescopic piece (11) slides back and forth in the slot of the end (1).
3. The vertebral fracture reduction device according to claim 2, characterized in that, The control mechanism includes an eccentric wheel (23) and a connecting rod (24). One end of the connecting rod (24) is connected to the edge of the eccentric wheel (23), and the other end of the connecting rod (24) is connected to the telescopic plate (11).
4. The vertebral fracture reduction device according to claim 3, characterized in that, The rod (2) includes an inner rod (21), the end of which is embedded in the adjusting part (3), and the front end of the inner rod (21) is fitted with the eccentric wheel (23).
5. The vertebral fracture reduction device according to claim 4, characterized in that, The rod (2) also includes an outer rod (22), which is sleeved on the outside of the inner rod (21), and the front end of the outer rod (22) is connected to the slot of the end (1).
6. The vertebral fracture reduction device according to claim 5, characterized in that, The rear end of the inner rod (21) is provided with rod serrations (25) along the axial direction, and the adjustment part (3) is provided with adjustment part serrations (31), and the rod serrations (25) and the adjustment part serrations (31) mesh with each other.
7. The vertebral fracture reduction device according to claim 6, characterized in that, A spring (26) is sleeved at the end of the outer rod (22), and a retaining ring (32) is provided inside the adjustment part (3). The spring (26) is disposed between the inner surface of the adjustment part (3) and the retaining ring (32).