An automated device for calcaneal fracture reduction and methods of use thereof

Abstract

This invention proposes an automated device and method for reducing calcaneal fractures. The device includes a traction mechanism fixedly connected to the cuneiform bone for forward traction and a calcaneal compression mechanism fixedly connected to the calcaneus for lateral compression. The calcaneal compression mechanism is connected to a bottom support structure and a levering mechanism located above the dorsum of the foot. It also includes a controller, with the controlled ends of the traction mechanism, calcaneal compression mechanism, and levering mechanism connected to the controller's output. This invention replaces manual precise reduction, accurately and quantitatively performing calcaneal stretching, compression, and levering reduction, reducing surgical time, achieving precise calcaneal reduction, reducing the number of fluoroscopy sessions, and allowing remote control during intraoperative CT scanning. This enables surgeons to perform reduction from a safe position without radiation, greatly protecting both patients and medical staff.

Description

Technical Field

[0001] This invention relates to the field of orthopedic medical device technology, and in particular to an automated device for calcaneal fracture reduction and its method of use. Background Technology

[0002] The calcaneus is the largest tarsal bone in the foot, an irregular rectangular structure composed of a thin layer of cortical bone surrounding abundant cancellous bone. Calcaneal fractures are the most common fractures of the tarsal bones of the foot, primarily characterized by severe pain in the heel, significant swelling and bruising, inability to bear weight on the heel, and tenderness upon palpation of the calcaneus. This condition is more common in adults, often caused by falls from heights or crush injuries. It is frequently accompanied by vertebral fractures, pelvic fractures, and injuries to the head, chest, or abdomen. Because the calcaneus is cancellous bone with a relatively rich blood supply, nonunion is rare. However, if the fracture line extends into the articular surface or reduction is inadequate, post-traumatic arthritis and pain when bearing weight on the calcaneus are common.

[0003] Intra-articular fractures of the calcaneus are usually treated with open reduction and internal fixation. However, this procedure carries a high risk of complications such as incision infection, skin flap necrosis, neurovascular injury, post-traumatic arthritis, and lateral hindfoot pain.

[0004] Based on a summary of nearly 500 cases of intra-articular calcaneal fracture treatment experience, the inventors systematically analyzed the relationship between postoperative complications and reduction quality of calcaneal fractures. In particular, they quantitatively assessed the relationship between postoperative calcaneal widening and lateral hindfoot pain. They found that conventional surgery can restore the anatomical morphology of the calcaneal articular surface and reshape the integrity of the articular surface. However, it cannot simultaneously and effectively restore the normal anatomical morphology of the calcaneus, such as height, width, and length. This is an important factor affecting the functional recovery of the affected foot and the high incidence of complications.

[0005] Through a series of anatomical, imaging, biomechanical, and clinical studies, the inventors first proposed the theory of internal compression for calcaneal fractures. This theory effectively restores the articular surface, length, and height of the calcaneus through percutaneous traction, lever reduction, minimally invasive placement of an anatomical bone plate, and compression fixation. Simultaneously, it applies sufficient compression to the calcaneus, restoring its normal width to a widened state. This compression is applied directly to the bone subcutaneously, hence the term "internal compression." The theory of internal compression mainly includes three points: First, closure and traction of the calcaneus to restore its length, followed by double-pin lever reduction to restore the articular surface. The angles of the calcaneus and Gissan angle are adjusted to restore the height of the calcaneus and reposition the articular surfaces.

[0006] Procedure: After admission, patients with calcaneal fractures undergo routine preoperative preparation. Surgery is performed after the swelling subsides and skin folds appear on the ankle. For unilateral fractures, the patient is placed in the lateral decubitus position on the unaffected side; for bilateral fractures, the patient is placed in the prone position after successful combined spinal-epidural anesthesia. First, a 3.5mm Kirschner wire is inserted transversely at the calcaneal tuberosity to traction the calcaneus and restore its length. Two 3.5mm Kirschner wires are then inserted from the lateral side of the Achilles tendon into the bone fragment above and behind the calcaneal tuberosity. Percutaneous manipulation is used to lift the anteroinferior rotation of the posterior articular surface, restoring the morphology of the posterior articular surface and the height of the calcaneus. With traction maintained by an assistant, the articular surface is percutaneously manipulated for reduction. This significantly reduces the side effects of traditional open reduction and improves the patient's postoperative recovery.

[0007] However, this surgery still presents several challenges during the procedure. Traditionally, the reduction process involves inserting Kirschner wires near the cuneiform bone and at the posterior end of the calcaneus. Two people then pull on the two Kirschner wires to stretch the patient's foot. After this, fluoroscopy is used to observe the reduction. Once the target is met, a protruding instrument is placed under the foot, and both hands simultaneously press down on the dorsum and heel to manipulate and reduce the reduction, with repeated fluoroscopic adjustments. Reduction of the affected area typically requires multiple people to assist with manual reduction. This process necessitates multiple fluoroscopic examinations to observe the reduction effect and requires considerable force for reduction and correction, making the procedure time-consuming and labor-intensive. Furthermore, medical staff operate under fluoroscopic radiation during calcaneal reduction, increasing their exposure to radiation. Similarly, multiple fluoroscopic examinations undoubtedly expose the patient to radiation. Summary of the Invention

[0008] This invention proposes an automated device and its method for reducing calcaneal fractures, which solves the problems of time-consuming and laborious surgical procedures and radiation exposure to medical staff and patients caused by the large number of X-ray exposures in traditional calcaneal fracture reduction methods. It reduces the number of fluoroscopy exposures during surgery and replaces manual precise reduction actions, laying the foundation for future unmanned remote intraoperative operations.

[0009] The technical solution of this invention is implemented as follows:

[0010] An automated device for calcaneal fracture reduction includes a traction mechanism fixedly connected to the cuneiform bone for pulling the cuneiform bone forward to open the calcaneal gap, and a calcaneal compression mechanism fixedly connected to the calcaneus for laterally compressing the calcaneus. The calcaneal compression mechanism is connected to a bottom support structure located directly below the cuneiform bone and calcaneal tuberosity of the foot, and a prying mechanism located above the dorsum of the foot for pressing the traction mechanism down to achieve longitudinal reduction of the calcaneus. The device also includes a controller for controlling the automatic operation of the entire device, with the controlled ends of the traction mechanism, calcaneal compression mechanism, and prying mechanism respectively connected to the output end of the controller.

[0011] To further optimize the technical solution, the calcaneal compression mechanism includes a fixed-end anvil, a fixed slide plate laterally fixed on the fixed-end anvil, a movable-end anvil slidably mounted on the fixed slide plate, and a calcaneal Kirschner wire that penetrates the calcaneus and positions it. A buffer plate is fixedly mounted on the inner wall of the fixed-end anvil, and a compression reset protrusion is fixedly mounted on the inner wall of the movable-end anvil. A compression drive mechanism is also provided between the fixed-end anvil and the movable-end anvil to drive the movable-end anvil and the compression reset protrusion to move laterally along the fixed slide plate. The controlled end of the compression drive mechanism is connected to the output end of the controller.

[0012] To further optimize the technical solution, a first pry bar shaft is provided on the movable end anvil, allowing the movable end anvil to move laterally relative to the first pry bar shaft. A second pry bar shaft is provided on the fixed end anvil. Positioning bearings are respectively provided inside the first and second pry bar shafts, and calcaneal Kirschner wire holes are respectively opened on the two positioning bearings, through which calcaneal Kirschner wires pass.

[0013] To further optimize the technical solution, the positioning bearing is a universal ball bearing, and the outer side of the universal ball bearing is fitted with an elastic ball sleeve.

[0014] To further optimize the technical solution, the bottom support structure includes two prying reset arms that are rotatably mounted on the first pry bar shaft and the second pry bar shaft, respectively. The two prying reset arms are inclined and connected by a connecting column at the bottom of their side walls, with a prying reset roller that supports the bottom of the person's feet.

[0015] To further optimize the technical solution, the traction mechanism includes an arc-shaped traction bow, a traction bow connecting rod connected to the middle of the traction bow, a Kirschner wire passing through the traction bow and penetrating the front end of the human foot wedge bone, and a traction motor for driving the traction bow and the front end Kirschner wire to move back and forth to pull the wedge bone forward. The controlled end of the traction motor is connected to the output end of the controller.

[0016] The technical solution is further optimized. The prying mechanism includes two prying rods respectively connected to the first prying rod shaft and the second prying rod shaft. One end of the two prying rods is connected to a motor fixing rod for positioning the fixed end of the traction motor. The other end of the two prying rods is respectively provided with a prying rod driving mechanism for driving the prying rod, the traction bow and the front Kirschner wire to rotate to achieve longitudinal reduction of the calcaneus. The controlled end of the prying rod driving mechanism is connected to the output end of the controller.

[0017] To further optimize the technical solution, the pry bar drive mechanism includes a pry reset arm protrusion inclinedly disposed above the pry reset arm, a first lead screw inclinedly disposed and threadedly fitted to the rear section of the pry bar, and a first motor connected to the bottom end of the first lead screw. The upper end of the first lead screw is rotatably connected to the pry reset arm protrusion, and the controlled end of the first motor is connected to the output end of the controller.

[0018] A method of using an automated device for calcaneal fracture reduction includes the following steps:

[0019] S1. Position the calcaneal compression mechanism to the calcaneus and the traction mechanism to the cuneiform or metatarsal bones. Use the traction mechanism to pull the cuneiform or metatarsal bones to open the calcaneal gap.

[0020] S2, the calcaneal compression mechanism performs lateral compression and plasticity on the calcaneus;

[0021] S3. The prying mechanism drives the traction mechanism to press down, prying the front of the foot. Under the combined action of traction force, lateral clamping force and prying force, the calcaneus is repositioned in the longitudinal direction.

[0022] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0023] This invention replaces manual precise reduction actions, enabling precise quantitative stretching, compression, and prying reduction of the calcaneus. This increases the accuracy of blind reduction, reduces surgical time, achieves precise calcaneus reduction, reduces the number of fluoroscopy sessions, and allows for remote control during intraoperative CT scanning. This allows doctors to perform the reduction from a safe position without radiation, greatly protecting both patients and medical staff.

[0024] The compression reduction plate of this invention has a raised design. The curvature of the raised plate is designed according to the curvature of the conventional calcaneal depression area. Its purpose is to conform to the bone surface during the compression process, increase the reduction accuracy, and at the same time, uniformly compress the curved surface pressure to reduce the compression of blood vessels and nerves during the reduction process.

[0025] The signal output terminal of the CT scanning device for CT scanning of the human foot is connected to the input terminal of the controller. The CT scanning device can feed back CT scanning information to the controller, thereby enabling medical staff to understand the reduction status of calcaneal fractures in the human foot. This facilitates the setting of parameters in the controller to remotely control the traction mechanism, calcaneal compression mechanism, and prying mechanism respectively. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of an automated device for calcaneal fracture reduction according to the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of an automated device for calcaneal fracture reduction according to the present invention. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the structure of an automated device for calcaneal fracture reduction according to the present invention. Figure 3 ;

[0030] Figure 4 This is a schematic diagram of the structure of an automated device for calcaneal fracture reduction according to the present invention. Figure 4 .

[0031] The components are: 1. Fixed end anvil, 2. Buffer plate, 3. Compression reset protrusion, 4. Fixed slide plate, 5. Ball screw, 6. Helical bone Kirschner wire, 7. Prying reset arm, 8. Prying reset roller, 9. Front end Kirschner wire, 11. Motor fixing rod, 12. Universal ball bearing, 13. First prying rod shaft, 14. Traction bow, 15. Traction motor, 16. Prying rod, 17. Movable end anvil, 18. Traction bow connecting rod, 19. Prying reset arm protrusion, 20. First lead screw, 21. First motor, 22. Second motor. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art should understand that the embodiments described below are only for illustrating the present invention and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] An automated device for calcaneal fracture reduction, combined with Figures 1 to 4 As shown, it includes a traction mechanism, a calcaneal compression mechanism, a bottom support structure, a prying mechanism, and a controller.

[0034] The controller is used to control the overall automatic operation of the device. The controlled ends of the traction mechanism, calcaneal compression mechanism, and levering mechanism are respectively connected to the output end of the controller. The controller can be a PLC controller or other types of controller. The controller is equipped with a display screen for medical staff to view the displayed information. The signal output end of the CT scanning device that performs CT scans on the foot is connected to the input end of the controller. The CT scanning device can feed back CT scan information to the controller, allowing medical staff to understand the reduction status of the calcaneal fracture in the foot. This facilitates the setting of parameters within the controller to remotely control the traction mechanism, calcaneal compression mechanism, and levering mechanism.

[0035] The calcaneal compression mechanism is fixedly connected to the calcaneus and applies lateral compression to it, enabling sufficient pressure to restore the widened calcaneus to its normal width and achieve repositioning in the calcaneal width direction. The calcaneal compression mechanism includes a fixed-end anvil plate 1, a fixed slide plate 4, a movable-end anvil plate 17, a calcaneal Kirschner wire 6, a buffer plate, a compression repositioning convex plate 3, and a compression drive mechanism.

[0036] The fixed slide plate 4 is horizontally fixedly mounted on the fixed end anvil 1. The movable end anvil 17 is slidably mounted on the fixed slide plate 4 and can slide horizontally along the fixed slide plate 4.

[0037] A buffer plate 2 is fixedly installed on the inner side wall of the fixed end cutting board 1. The buffer plate 2 in this invention is made of rigid memory cushioning cotton and matches the shape of the back of a human foot.

[0038] A compression reduction protrusion 3 is fixedly installed on the inner wall of the movable end anvil 17. The compression reduction protrusion 3 matches the shape of the back of the human foot. The compression reduction plate of this invention has a protruding design. The curvature of the protrusion is designed according to the curvature of the conventional calcaneal depression area. Its purpose is to conform to the bone surface during the compression process, increase the reduction accuracy, and at the same time uniformly compress the curved surface pressure to reduce the compression of blood vessels and nerves during the reduction process.

[0039] A compression drive mechanism is also provided between the fixed-end anvil 1 and the movable-end anvil 17 for driving the movable-end anvil 17 and the compression reset protrusion 3 to move laterally along the fixed slide plate 4. The controlled end of the compression drive mechanism is connected to the output end of the controller. The compression drive mechanism includes a ball screw 5 and a second motor 22. One end of the ball screw 5 moves through the buffer plate 2 and is rotatably connected to the fixed-end anvil 1, while the other end of the ball screw 5 is threadedly fitted to the movable-end anvil 17. The second motor 22 is connected to one end of the ball screw 5, and its controlled end is connected to the output end of the controller. The second motor 22 is a stepper motor. When the second motor 22 operates, it drives the ball screw 5 to rotate, thereby driving the movable-end anvil 17 and the compression reset protrusion 3 to move laterally along the fixed slide plate 4, achieving the purpose of lateral compression of the calcaneus.

[0040] The movable end anvil 17 is provided with a first pry bar pivot 13. The movable end anvil 17 can move laterally relative to the first pry bar pivot 13. That is, when the movable end anvil 17 moves laterally along the fixed slide plate 4, it will also move laterally along the first pry bar pivot 13, thereby ensuring that the movable end anvil 17 can move normally.

[0041] The fixed end anvil plate 1 is provided with a second pry bar shaft. The first pry bar shaft 13 and the second pry bar shaft are respectively provided with positioning bearings. The two positioning bearings are respectively provided with calcaneal Kirschner wire holes. The calcaneal Kirschner wire 6 passes through the two calcaneal Kirschner wire holes, penetrates the calcaneus and positions the calcaneus.

[0042] When inserting the calcaneal Kirschner wire 6, the insertion position may deviate or change due to differences in patient posture and the location of the calcaneal fracture line; that is, the calcaneal Kirschner wire 6 will not always be inserted vertically laterally. To address this, the present invention uses a universal ball bearing 12 as the positioning bearing, and the calcaneal Kirschner wire hole is located on the universal ball bearing 12. Furthermore, the present invention includes an elastic ball sleeve on the outside of the universal ball bearing (i.e., the ball shaft). The ball sleeve is made of polytetrafluoroethylene (PTFE). With the cooperation of the ball shaft, the ball sleeve can make slight vertical adjustments (approximately 2mm) to the inserted calcaneal Kirschner wire, perpendicular to the calcaneal bone, maintaining good perpendicularity of the calcaneal Kirschner wire and facilitating its exit from the universal ball bearing on the other side.

[0043] The universal ball bearing 12 can rotate inside the pry bar shaft, with a small rotation angle to avoid the problem of the universal bearing on the other side being unable to pass through due to an excessive rotation angle. The exposed part of the universal ball bearing 12 is spherical. When the inserted calcaneal Kirschner wire is not perpendicular to the calcaneus, it is necessary to make a slight adjustment to the calcaneal Kirschner wire. By slightly rotating the universal ball bearing 12, the position of the calcaneal Kirschner wire hole will change, thereby slightly changing the insertion angle. The universal ball bearing can also be finely adjusted up and down to compress the outer ball sleeve, so as to ensure that the inserted calcaneal Kirschner wire is perpendicular to the calcaneus.

[0044] In addition, it should be noted that when using this method for needle insertion, it is only necessary to insert the needle through one of the two universal ball bearings, and the inserted Kirschner wire still passes through the calcaneus.

[0045] The calcaneal compression mechanism is connected to a bottom support structure, which is located directly below the cuneiform bone and calcaneal tuberosity of the foot.

[0046] The bottom support structure includes two prying reset arms 7 that are rotatably mounted on the first pry bar shaft 13 and the second pry bar shaft, respectively. The two prying reset arms 7 are inclined and connected by a connecting column at the bottom of their side walls. A prying reset roller 8 is provided to support the bottom of the person's feet.

[0047] The traction mechanism is fixedly connected to the cuneiform or metatarsal bone and is used to pull the cuneiform or metatarsal bone forward to open the calcaneal gap. The traction mechanism includes a traction bow 14, a traction bow connecting rod 18, a Kirschner wire 9 at the front end, and a traction motor 15.

[0048] The traction bow 14 is arc-shaped and has Kirschner wire holes. The traction bow connecting rod 18 is connected to the middle of the traction bow 14.

[0049] The Kirschner wire 9 at the front end is inserted into the traction bow 14 and passes through the cuneiform or metatarsal bone of the foot.

[0050] The controlled end of the traction motor 15 is connected to the output end of the controller. The traction motor 15 is used to drive the traction bow 14 and the front Kirschner wire 9 to move back and forth, so as to pull the cuneiform or metatarsal bone forward, thereby opening the calcaneal gap to facilitate the subsequent reduction of the calcaneus.

[0051] The traction motor 15 in this invention is a linear motor, which can convert the rotational motion of the motor into linear motion. In this way, the traction motor 15 can drive the traction bow 14 and the front Kirschner wire 9 to pull the cuneiform or metatarsal bone forward.

[0052] The lever mechanism is located above the instep of the human foot and is used to push down the traction bow 14 and the front Kirschner wire 9 in the traction mechanism to achieve longitudinal reduction of the calcaneus.

[0053] The prying mechanism includes two pry bars 16 respectively connected to the first pry bar shaft 13 and the second pry bar shaft. One end of each pry bar 16 is connected to a motor fixing rod 11 for positioning the fixed end of the traction motor 15. The end of each pry bar 16 has a connecting ball head, and the motor fixing rod 11 is positioned within the connecting ball head. The other ends of each pry bar 16 are respectively equipped with a pry bar drive mechanism. The pry bar drive mechanism drives the pry bar 16, the traction bow 14, and the front Kirschner wire 9 to rotate to achieve longitudinal reduction of the calcaneus. The controlled end of the pry bar drive mechanism is connected to the output end of the controller.

[0054] The pry bar drive mechanism includes a pry reset arm protrusion 19, a first lead screw 20, and a first motor 21. The pry reset arm protrusion 19 is inclinedly disposed above the pry reset arm 7, and the pry reset arm protrusion 19 is configured as a block structure. The pry bar 16 is divided into a front section and a rear section by a first pry bar shaft 13 or a second pry bar shaft. The first lead screw 20 is inclinedly disposed and threadedly fitted to the rear section of the pry bar 16. The upper end of the first lead screw 20 is rotatably connected to the pry reset arm protrusion 19. The first motor 21 is connected to the bottom end of the first lead screw 20, and the controlled end of the first motor 21 is connected to the output end of the controller. The first motor 21 is a stepper motor. When the first motor 21 operates, it drives the first lead screw 20 to rotate, thereby driving the rear section of the pry bar 16 to move upward and the front section of the pry bar 16 to move downward, driving the traction bow 14 and the front Kirschner wire 9 to move downward, thereby realizing the prying of the front end of the person's foot.

[0055] Before performing a reduction procedure on a calcaneal fracture, a CT scanner scans the patient's foot to determine the location of the calcaneal fracture line and the required reduction status. Medical staff then input the patient information into a controller, which coordinates the operation of various mechanisms within the device to achieve efficient reduction of the calcaneal fracture, thereby reducing the number of CT scans required for the patient.

[0056] The reduction method for calcaneal fractures in this invention mainly consists of three parts: stretching, compression, and prying reduction. The specific process of reducing calcaneal fractures in this invention is as follows.

[0057] S1. Insert two Kirschner wires respectively. According to the distribution of the calcaneal fracture line, insert the calcaneal Kirschner wire 6 into the calcaneus at the posterior end of the calcaneal fracture line. Pass the tip Kirschner wire 9 through the traction bow 14 and insert it into the position of the cuneiform or metatarsal bone.

[0058] The controller controls the operation of the traction motor 15. Since the traction motor 15 is a linear motor, the traction motor 15 drives the traction bow 14 and the front Kirschner wire 9 to pull the cuneiform or metatarsal bone in front of the toe, thereby opening the calcaneal gap through the soft tissue.

[0059] S2. The controller controls the operation of the second motor 22, which drives the ball screw 5 to rotate, thereby driving the movable end anvil 17 and the compression reset convex plate 3 to move laterally along the fixed slide plate 4. Under the combined action of the compression reset convex plate 3 and the buffer plate 2, the calcaneus is subjected to lateral compression and plasticity.

[0060] S3. The controller controls the operation of the first motor 21, which drives the first lead screw 20 to rotate, causing the rear section of the pry bar 16 to move upward and the front section of the pry bar 16 to move downward, thus driving the traction bow 14 and the front Kirschner wire 9 to move downward, thereby prying the front end of the foot. Under the combined action of the supporting force and the prying force of the foot, the foot bends into an "arch shape". The calcaneus is reduced in the longitudinal direction under the combined action of traction force, lateral clamping force and prying force.

[0061] The CT scanner scans the foot and sends the scan information to the controller. Medical staff then use the information displayed on the controller to determine if the traction, calcaneal compression, and levering mechanisms need further intervention. If fine-tuning is required, the reset parameters can be input into the controller, which then coordinates the traction, calcaneal compression, and levering mechanisms to perform the fine-tuning of the calcaneal fracture.

[0062] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An automated device for calcaneal fracture reduction, characterized in that, The device includes a traction mechanism fixedly connected to the cuneiform bone to pull the cuneiform bone forward and open the calcaneal gap, and a calcaneal compression mechanism fixedly connected to the calcaneus and laterally compressing the calcaneus. The calcaneal compression mechanism is connected to a bottom support structure located directly below the cuneiform bone and calcaneal tuberosity of the foot, and a prying mechanism located above the dorsum of the foot to drive the traction mechanism downward to achieve longitudinal repositioning of the calcaneus. It also includes a controller for controlling the automatic operation of the entire device. The controlled ends of the traction mechanism, calcaneal compression mechanism and prying mechanism are respectively connected to the output end of the controller. The calcaneal compression mechanism includes a fixed end anvil (1), a fixed slide plate (4) laterally fixed on the fixed end anvil (1), and a sliding assembly on the fixed slide plate (4). The movable anvil (17) and the calcaneal Kirschner wire (6) that penetrates the calcaneus and positions it are provided. A buffer plate is fixedly installed on the inner wall of the fixed anvil (1), and a compression and repositioning protrusion (3) is fixedly installed on the inner wall of the movable anvil (17). A compression driving mechanism for driving the movable anvil (17) and the compression and repositioning protrusion (3) to move laterally along the fixed slide plate (4) is also provided between the fixed anvil (1) and the movable anvil (17). A first pry bar shaft (13) is provided on the movable anvil (17), and the movable anvil (17) can move laterally relative to the first pry bar shaft (13). A second pry bar shaft is provided on the fixed anvil (1). The bottom support structure includes respectively Two prying reset arms (7) are rotatably mounted on the first pry bar shaft (13) and the second pry bar shaft. The two prying reset arms (7) are inclined and connected by a connecting column between their bottom ends to a prying reset roller (8) that supports the bottom of the foot. The traction mechanism includes an arc-shaped traction bow (14), a traction bow connecting rod (18) connected to the middle of the traction bow (14), a Kirschner wire (9) passing through the traction bow (14) and penetrating the wedge bone of the foot, and a traction motor (15) for driving the traction bow (14) and the Kirschner wire (9) to move back and forth to pull the wedge bone forward. The prying mechanism includes two prying rod shafts (13 and 2) respectively connected to the first pry bar shaft (13) and the second pry bar shaft. Two pry bars (16) are provided on the upper part. One end of the two pry bars (16) is connected to a motor fixing rod (11) for positioning the fixed end of the traction motor (15). The other end of the two pry bars (16) is respectively provided with a pry bar drive mechanism for driving the pry bar (16), traction bow (14) and front Kirschner wire (9) to rotate to realize longitudinal reduction of the calcaneus. The pry bar drive mechanism includes a pry bar reduction arm protrusion (19) inclined above the pry bar reduction arm (7), a first screw (20) inclined and threaded with the rear section of the pry bar (16), and a first motor (21) connected to the bottom end of the first screw (20). The upper end of the first screw (20) is rotatably connected to the pry bar reduction arm protrusion (19).

2. The automated device for calcaneal fracture reduction according to claim 1, characterized in that, The controlled end of the extrusion drive mechanism is connected to the output end of the controller.

3. The automated device for calcaneal fracture reduction according to claim 2, characterized in that, The first pry bar shaft (13) and the second pry bar shaft are respectively provided with positioning bearings. The two positioning bearings are respectively provided with Kirschner wire holes for the calcaneus. The Kirschner wire (6) for the calcaneus passes through the two Kirschner wire holes.

4. An automated device for calcaneal fracture reduction according to claim 3, characterized in that, The positioning bearing is a universal ball bearing (12).

5. An automated device for calcaneal fracture reduction according to claim 4, characterized in that, The controlled end of the traction motor (15) is connected to the output end of the controller.

6. An automated device for calcaneal fracture reduction according to claim 5, characterized in that, The controlled end of the lever drive mechanism is connected to the output end of the controller.

7. An automated device for calcaneal fracture reduction according to claim 6, characterized in that, The controlled end of the first motor (21) is connected to the output end of the controller.

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