Guiding device for calcaneus internal fixation screw placement

Abstract

The utility model relates to the technical field of orthopedic surgery, and discloses a calcaneus internal fixation screw placement guiding device which comprises a supporting frame, a guiding sleeve and a locking piece. The supporting frame is fixed to the skin surface of a patient and corresponds to the calcaneus in position. The supporting frame comprises a middle connecting block, a left positioning block, a right positioning block and an upper positioning block. The three guide sleeves are located in straight notches A formed in the left positioning block, the right positioning block and the upper positioning block respectively, the angle of the guide sleeves is adjusted in the straight notches, the guide sleeves are locked and positioned through locking pieces after angle adjustment, the angle of the guide sleeves can be adjusted, and the diameter and the position of a guide hole are designed according to the size and the path of an internal fixation screw; an operator can adjust the position of the guide arm or the guide rod according to fracture types and screw placement requirements. Through the virtual space bone nail planning path, the guiding device ensures that the screw can be accurately placed along the preset path, and the risk of operation errors is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of orthopedic surgery technology, specifically relating to a calcaneal internal fixation screw placement guide device. Background Technology

[0002] Closed reduction and internal fixation surgery for calcaneal fractures usually involves the surgeon performing effective reduction, followed by the insertion of multiple screws from outside the skin, depending on the fracture type and fixation requirements, to achieve reliable and stable internal fixation.

[0003] The placement of screws often relies on the surgeon's experience and judgment, involving a series of operations from the needle entry point and screw insertion to the target endpoint. Due to the extremely complex structure of the calcaneus (or other irregular bones), deviations from the planned placement route are very common, especially among young orthopedic surgeons. This can result in screws protruding outside the bone or impacting within the bone, easily causing bone fractures, damage to important extra-bone soft tissue structures, and breakage of the drill or screw after intra-bone impact. Achieving satisfactory results requires a solid medical foundation, a thorough understanding of three-dimensional space, and long-term training, resulting in a long learning curve. Furthermore, repeated adjustments during surgery increase the incidence of tissue damage, radiation exposure, and postoperative infection.

[0004] To address the aforementioned issues, we propose a calcaneal internal fixation screw placement guide device. Based on the three-dimensional spatial structure of the calcaneus, a virtual spatial screw planning path is established outside the skin. Through this guide device, screws are precisely placed to achieve effective internal fixation while avoiding various risks caused by deviation from the path. It is an ideal and practical orthopedic internal fixation device. Utility Model Content

[0005] This invention addresses the technical problems in existing closed reduction and internal fixation surgery for calcaneal fractures, where precision relies heavily on the surgeon's experience, easily leading to deviations from the planned path and resulting in bone and soft tissue damage. Young surgeons face a long learning curve, and intraoperative adjustments increase the risk of tissue damage, radiation exposure, and infection. The lack of precise guiding tools further complicates the surgery, impacting internal fixation effectiveness and patient recovery.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A calcaneal internal fixation screw placement guide device includes a support frame, a guide sleeve, and a locking element; the support frame is fixed to the patient's skin surface and corresponds to the position of the calcaneus; the guide sleeve has a guide hole and can be adjusted in three-dimensional space to adapt to the three-dimensional spatial structure of the calcaneus.

[0008] The support frame includes a middle connecting block, a left positioning block and a right positioning block connected to both sides of the middle connecting block, and an upper positioning block connected to the upper side of the middle connecting block by a connecting rod;

[0009] The guide sleeve has three slots A located in the left, right and upper positioning blocks respectively. The guide sleeve is angled within the slots so that the diameter and position of the guide hole on the guide sleeve are designed according to the size and path of the internal fixation screw. With the adjustable guide sleeve, the surgeon can adjust the position of the guide arm or guide rod according to the fracture type and screw placement requirements.

[0010] The locking element is used to lock and fix the guide sleeve after angle adjustment in the straight groove A.

[0011] Before surgery, a virtual spatial path for the bone screw is established on the skin to ensure that the position of the guide hole matches the predetermined screw placement path. During the operation, the calcaneal internal fixation screw placement guide device is first fixed to the patient's skin to ensure that it corresponds to the position of the calcaneus. According to the type of calcaneal fracture and the screw placement requirements, the guide sleeve is adjusted, and the screw is placed through the guide hole to ensure that the screw is accurately inserted along the predetermined path.

[0012] Preferably, the straight groove A on the left and right positioning blocks is a horizontal straight groove, and the straight groove A on the upper positioning block is a vertical straight groove.

[0013] Preferably, the left positioning block, the right positioning block, and the upper positioning block are provided with straight slots B that communicate with the straight slot A;

[0014] An externally threaded rod fixedly mounted on the guide sleeve passes through the straight groove B and is locked and positioned by a locking device on the outside of the straight groove B. The design of the straight groove B connecting with the straight groove A allows the guide sleeve to be precisely adjusted in three-dimensional space and is fixed by the externally threaded rod and the locking device.

[0015] Preferably, the locking mechanism includes a double-layer washer located outside the straight groove B and fitted onto the outer side of the externally threaded rod, and a locking nut threaded onto the outer side of the externally threaded rod and locking the guide sleeve within the straight groove A. The locking nut has a built-in handle. The double-layer washer provides a more uniform and stable pressure distribution, reducing pressure on soft tissue. The locking nut with its built-in handle allows the operator to lock the guide sleeve more easily and quickly.

[0016] Preferably, the straight groove B on the left and right positioning blocks is a horizontal straight groove, and the straight groove B on the upper positioning block is a vertical straight groove.

[0017] Preferably, the left and right positioning blocks are connected to the middle connecting block by connecting strips on both sides, and fixing strips are provided on the outer sides of the left and right positioning blocks respectively. This makes the support frame more robust.

[0018] Compared with the prior art, the technical effects and advantages of this utility model are:

[0019] This calcaneal internal fixation screw guide uses virtual space to plan the screw path, ensuring precise screw insertion along the predetermined path and reducing the risk of surgical errors. The guide sleeve is adjustable in three-dimensional space to adapt to different three-dimensional structures of the calcaneus, thus meeting the needs of various fracture types and screw placement. Due to the precision of screw placement, damage to surrounding healthy tissues is reduced, lowering the risk of postoperative complications. The guide device simplifies the surgical procedure, improves efficiency, and makes the surgical process more standardized and automated.

[0020] Compared to traditional methods, this device improves the accuracy of screw placement, reduces human error, and makes surgical outcomes more reliable. For young orthopedic surgeons, using the guide device can shorten the learning curve and improve surgical skills. It reduces the risk of tissue damage and complications during surgery, improving patient safety. Due to the precision of screw placement, it reduces reliance on radiation during surgery, lowering the patient's radiation risk. The use of the guide device can shorten operation time and improve surgical efficiency.

[0021] Compared to existing surgical planning and navigation equipment, this device offers a more intuitive and user-friendly interface, making surgical procedures simpler and more efficient. The establishment of virtual pathways and the adjustment of the guide sleeve more accurately reflect the patient's individual anatomy, thereby improving surgical accuracy and safety. Furthermore, the device's design allows surgeons to adapt to the surgical process more quickly, reducing the learning curve and providing patients with better treatment outcomes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is an exploded view of the present invention;

[0024] Figure 3 This is a diagram showing the state of the guide sleeve after adjustment.

[0025] In the diagram: 2. Middle connecting block; 3. Left positioning block; 4. Right positioning block; 5. Connecting rod; 6. Upper positioning block; 7. Guide sleeve; 8. Straight groove A; 9. Guide hole; 10. Straight groove B; 11. External threaded rod; 12. Double-layer gasket; 13. Locking nut; 14. Handle; 15. Connecting strip; 16. Fixing strip; 17. Internal fixing pin. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a calcaneal internal fixation nail placement guide device, including a support frame, a guide sleeve 7 and a locking member; the support frame is fixed on the patient's skin surface and corresponds to the position of the calcaneus, the guide sleeve 7 is provided with a guide hole 9, and the guide sleeve 7 can be adjusted in three-dimensional space to adapt to the three-dimensional spatial structure of the calcaneus.

[0029] The support frame includes a central connecting block 2, a left positioning block 3 and a right positioning block 4 connected to both sides of the central connecting block 2, and an upper positioning block 6 connected to the upper side of the central connecting block 2 via a connecting rod 5. The left positioning block 3 and right positioning block 4 are connected to both sides of the central connecting block 2 via connecting strips 15, and fixing strips 16 are provided on the outer sides of the left and right positioning blocks 3 and 4 respectively. This design enhances the stability of the entire device, making the support frame more robust and helping to reduce errors during surgery. The fixing strips 16 further secure the positioning blocks, preventing them from shifting during surgery.

[0030] The guide sleeve 7 has three straight slots A8 located on the left positioning block 3, right positioning block 4 and upper positioning block 6 respectively. The guide sleeve 7 is angled within the straight slots so that the diameter and position of the guide hole 9 on the guide sleeve 7 are designed according to the size and path of the internal fixation screw 17. Through the adjustable guide sleeve 7, the surgeon can adjust the position of the guide arm or guide rod according to the fracture type and screw placement requirements.

[0031] The locking component is used to lock and fix the guide sleeve 7, after angle adjustment, inside the straight groove A8.

[0032] The straight grooves A8 on the left positioning block 3 and right positioning block 4 are transverse straight grooves, while the straight groove A8 on the upper positioning block 6 is a longitudinal straight groove. This design allows the guide sleeve 7 to be adjusted on different planes. The transverse straight grooves allow the left and right positioning blocks 4 to be adjusted horizontally, while the longitudinal straight grooves allow the upper positioning block 6 to be adjusted vertically. This better adapts to the three-dimensional structure of the calcaneus, ensuring that the screw can be inserted at the optimal angle and position.

[0033] The left positioning block 3, right positioning block 4, and upper positioning block 6 are each provided with a straight groove B10 that communicates with the straight groove A8. An externally threaded rod 11 fixedly mounted on the guide sleeve 7 passes through the straight groove B10 and is locked in place by a locking device on the outside of the straight groove B10. The straight grooves B10 on the left and right positioning blocks 3 and 4 are transverse, while the straight groove B10 on the upper positioning block 6 is longitudinal. The design of the straight groove B10 communicating with the straight groove A8 allows the guide sleeve 7 to be precisely adjusted in three-dimensional space and fixed by the externally threaded rod 11 and the locking device. This ensures the stability of the guide sleeve 7 during surgery, prevents movement during screw placement, and improves the accuracy of screw placement.

[0034] The locking mechanism includes a double-layer washer 12 located outside B10 and fitted onto the outer side of the externally threaded rod 11, and a locking nut 13 threaded onto the outer side of the externally threaded rod 11 and locking the guide sleeve 7 within the straight groove A8. The locking nut 13 has a built-in handle 14. The double-layer washer 12 provides a more uniform and stable pressure distribution, reducing pressure on soft tissues. The locking nut 13 with its built-in handle 14 allows the surgeon to lock the guide sleeve 7 more easily and quickly, saving surgical time and reducing the risk of infection.

[0035] Before surgery, a virtual space for planning bone screws is established on the skin to ensure that the position of the guide hole 9 matches the predetermined screw placement path. During the surgery, the calcaneal internal fixation screw placement guide device is first fixed to the patient's skin to ensure that it corresponds to the position of the calcaneus. Depending on the type of calcaneal fracture and the screw placement requirements, the guide sleeve 7 is adjusted, and the screw is placed through the guide hole 9, ensuring that the screw is accurately inserted along the predetermined path. In modern medical technology, high-tech equipment used for surgical planning and navigation typically includes medical imaging equipment, 3D modeling and visualization software, surgical navigation systems, etc. When using these devices and technologies for surgical planning, doctors usually place markers on the skin surface and then use specific tracking devices (such as infrared cameras or magnetic trackers) to monitor the position of these markers, thereby establishing a precise bone screw planning path in virtual space.

[0036] The support frame is a basic structure used to support and position other components. It is temporary, and its primary purpose is to provide guidance and stability during fixation. Once the internal fixation screws 17 are successfully placed and the desired internal fixation effect is achieved, this frame is typically removed. Removal is to avoid prolonged pressure on soft tissues and reduce the risk of postoperative complications such as infection or skin compression injuries.

[0037] The guide sleeve 7 is adjustable in three-dimensional space to adapt to the three-dimensional spatial structure of the calcaneus. The guide sleeve 7 has guide holes 9, which are the paths for screw placement. The left positioning block 3, right positioning block 4, and upper positioning block 6 are connected by an intermediate connecting block 2 and a connecting rod 5. These positioning blocks provide the function of fixing and adjusting the angle of the guide sleeve 7. A straight groove A8 is located on the positioning block, and the guide sleeve 7 is located within the straight groove A8 for angle adjustment. Thus, the diameter and position of the guide hole 9 on the guide sleeve 7 can be designed according to the size and path of the internal fixation screw 17. A locking element is used to lock the adjusted guide sleeve 7 firmly within the straight groove A8, ensuring that it does not move during surgery.

[0038] With a pre-set virtual path and an adjustable guide sleeve 7, screws can be precisely inserted along the predetermined path, reducing surgical errors. Thanks to the guide device, surgeons can quickly locate and insert screws without complex anatomy and measurements. Precise screw placement reduces damage to surrounding healthy tissue, thus lowering the risk of complications. Because the guide sleeve 7 is adjustable, it can accommodate different fracture types and screw placement requirements. This device provides a simplified surgical approach, making the surgical process more standardized and automated. In summary, this calcaneal internal fixation screw placement guide device aims to improve the accuracy and efficiency of orthopedic surgery while reducing patient risks and complications.

[0039] This calcaneal internal fixation screw placement guide device is based on a surgical planning and navigation system in modern medical technology. The surgeon first uses medical imaging equipment to acquire three-dimensional image data of the patient's calcaneus, and then uses 3D modeling and visualization software to perform precise fracture analysis and screw placement path planning. Subsequently, markers are placed on the patient's skin surface. These markers are monitored in real time by tracking devices in the surgical navigation system (such as infrared cameras or magnetic trackers), thereby establishing a planned screw path in virtual space corresponding to the actual anatomical structure. During surgery, the surgeon precisely inserts the screw using the adjustable guide sleeve 7, following these virtual paths.

[0040] This device, through a pre-set virtual path and an adjustable guide sleeve 7, ensures that the screw can be precisely inserted along the predetermined path, greatly reducing the risk of errors during surgery. Because the guide sleeve 7 can be finely adjusted in three-dimensional space, combined with the precise data provided by the surgical navigation system, surgeons can quickly locate and insert the screw without performing complex dissections and measurements. This precise screw placement method significantly reduces damage to surrounding healthy tissue, thereby lowering the risk of postoperative complications.

[0041] The use of this calcaneal internal fixation screw guide device has greatly improved the efficiency and standardization of surgery. This device simplifies the surgical procedure, reduces uncertainties, and makes the process more automated and standardized. By reducing damage to soft tissues and avoiding unnecessary anatomical manipulations, surgical time is shortened, and the patient's recovery period is correspondingly reduced. Furthermore, this device reduces the risk of radiation exposure and postoperative infection, providing patients with a safer and more efficient surgical experience.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 calcaneus internal fixation nail guiding device, characterized in that, The utility model relates to a kind of calcaneus internal fixation nail guiding devices, including: Support frame is fixed on the skin surface of patient and corresponds with the position of calcaneus, and support frame includes middle connecting block (2), left positioning block (3) and right positioning block (4) connected on both sides of middle connecting block (2) and upper positioning block (6) connected on the side above middle connecting block (2) by connecting rod (5); Guide sleeve (7) is provided with three and is located in straight slot A (8) opened on left positioning block (3), right positioning block (4) and upper positioning block (6) respectively, and guide sleeve (7) is angle-adjusted in straight slot, so that the diameter and position of guide hole (9) on guide sleeve (7) are designed according to the size and path of internal fixation nail (17), to adapt to the three-dimensional space structure of calcaneus; Locking part is used to lock and fix guide sleeve (7) after angle adjustment in straight slot A (8).

2. The guide device for inserting an internal fixation nail into a calcaneus according to claim 1, wherein: Straight slot A (8) on left positioning block (3) and right positioning block (4) is horizontal straight slot, and straight slot A (8) on upper positioning block (6) is vertical straight slot.

3. The guide device for inserting an internal fixation nail into a calcaneus according to claim 1, wherein: Straight slot B (10) is opened on left positioning block (3), right positioning block (4) and upper positioning block (6) and communicated with straight slot A (8); External thread rod (11) fixedly arranged on guide sleeve (7) is arranged through straight slot B (10) and locked and positioned by locking part outside straight slot B (10).

4. The guide device for inserting an internal fixation nail into a calcaneus according to claim 3, wherein: Locking part includes double-layer gasket (12) located outside straight slot B (10) and sleeved on the outer side of external thread rod (11) and locking nut (13) threadedly coupled on the outer side of external thread rod (11) and locked and positioned guide sleeve (7) in straight slot A (8), and locking nut (13) is provided with handle (14) on it.

5. The guide device for inserting an internal fixation nail into a calcaneus according to claim 3, wherein: Straight slot B (10) on left positioning block (3) and right positioning block (4) is horizontal straight slot, and straight slot B (10) on upper positioning block (6) is vertical straight slot.

6. The calcaneus internal fixation nail guiding device according to claim 1, wherein: Middle connecting block (2) is connected with left positioning block (3) and right positioning block (4) by connecting strip (15) on both sides respectively, and left positioning block (3) and right positioning block (4) are respectively provided with fixed strip (16) outside.

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