CN221654530U - Calcaneus fracture reduction device - Google Patents

Abstract

The utility model provides a calcaneus fracture reduction device. The calcaneus fracture reduction device comprises a first forceps handle, a second forceps handle, a hinge bolt and a guide mechanism, wherein the second forceps handle is arranged to be intersected with the first forceps handle, the hinge bolt is used for hinging the first forceps handle and the second forceps handle, the second forceps handle is used for being inserted into the skin of a patient to clamp bones, the first forceps handle comprises a first forceps handle main body part, a first forceps handle extending part connected with the first forceps handle main body part, a fixed ring arranged on the first forceps handle main body part and far away from one end of the first forceps handle extending part, the guide mechanism comprises a first hollow bolt and a guide cylinder, the first hollow bolt is in threaded connection with the fixed ring, and the guide mechanism is used for installing a first screw guide needle. The calcaneus fracture complex position device provided by the utility model has the advantages of good clamping effect, simple structure and strong practicability because the guide function is arranged at a plurality of positions.

Description

Calcaneus fracture reduction device

Technical Field

The utility model belongs to the technical field of medical instruments, and in particular relates to a calcaneal fracture reduction device.

Background Art

Calcaneus fracture is a common fracture of the hindfoot. If the calcaneal fracture is severe, the fracture fragments are mainly divided into five large pieces, including the calcaneal tuberosity, the posterior talar articular surface bone fragment, the talar bone fragment, the anterior medial bone fragment and the anterolateral bone fragment. If the calcaneal fracture is mild, the fracture fragments are fewer. It can be understood that when the calcaneal fracture is severe, the calcaneus can be split into five large pieces at most, while when the injury is mild, the calcaneus may be split into four, three or two pieces.

At present, the treatment of calcaneal fracture mainly includes conservative treatment, open reduction plate screw internal fixation treatment, minimally invasive Kirschner wire, screw, micro plate or intramedullary nail treatment, and 3D printed guide plate percutaneous screw fixation treatment. Among them, conservative treatment usually leads to hindfoot deformity healing and traumatic arthritis; open reduction plate screw internal fixation treatment is more traumatic, and skin necrosis and infection often occur; minimally invasive screw treatment lacks good fixation and reduction guide tools, so it often leads to poor reduction and poor fixation (all 5 bone fragments cannot be effectively fixed), and the number of fluoroscopy required during the operation is very high. Due to the anatomical complexity and anatomical variation of the calcaneus, the pathological changes of calcaneal fractures are diverse, and the fixation methods are also good and bad. It can usually only be applied to simple fractures with fewer bone fragments; 3D printed guide plate percutaneous screw fixation treatment of calcaneal fractures often has problems with the accuracy of the guide plate due to the percutaneous use of the guide plate. The reasons include the sliding nature of the soft tissue itself, the swelling of the soft tissue will increase or disappear from the time of making the guide plate to the time of surgery, and the deformation of the soft tissue caused by the reduction process of the fracture during the operation.

Utility Model Content

The utility model aims to provide a calcaneal fracture reduction device which is suitable for different calcaneal fracture injury degrees, has guiding functions arranged at multiple positions, and can be used for treating two to five fracture fragments.

To achieve the above object, the utility model provides a calcaneal fracture reduction device, comprising:

A first pliers handle, the first pliers handle comprising a first pliers handle main body, a first pliers handle extension connected to the first pliers handle main body, a fixing ring disposed at one end of the first pliers handle main body away from the first pliers handle extension, and a first threaded hole and a first connecting hole provided in the first pliers handle extension;

A second clamp handle, the second clamp handle comprising a second clamp handle main body, a second clamp handle extension connected to the second clamp handle main body, and a second threaded hole and a second connecting hole provided in the second clamp handle extension, the second clamp handle main body is used to be inserted into the patient's skin, the second threaded hole is arranged opposite to the first threaded hole, and the second connecting hole is arranged opposite to the first connecting hole;

A hinge bolt, wherein the hinge bolt is inserted into the first threaded hole and the second threaded hole to hinge the first clamp handle and the second clamp handle;

The guiding mechanism comprises a first hollow bolt threadedly connected to the fixing ring, and a guide needle cylinder inserted into the first connecting hole and the second connecting hole, the first hollow bolt is used to install a first screw guide needle, and the angle between the first clamp handle main body and the second clamp handle main body is locked by the hinge bolt and the guide needle cylinder.

In a specific embodiment, the guide needle cylinder includes a connecting cylinder body inserted into the first connecting hole and the second connecting hole, and a guide cylinder body connected to the connecting cylinder body and perpendicular to each other, the guide cylinder body includes a cylindrical cylinder body, and a guide hole formed through two bottom surfaces of the cylinder body, and the guide hole is used to install the fifth screw guide needle.

In a specific embodiment, the second pliers handle also includes a slide groove portion arranged at one end of the second pliers handle main body near the second pliers handle extension portion, and the slide groove portion includes a base extending from the second pliers handle main body in a direction away from the first pliers handle, and a protrusion extending from the middle part of the base in a direction away from the base.

In a specific embodiment, the guide mechanism also includes a first connecting component that can be detachably mounted on the slide groove portion, and a second hollow bolt connected to the first connecting component, the first connecting component includes a first sliding portion having a first slot, a first connecting portion extending vertically from one end of the first sliding portion, a second connecting portion extending vertically from the first connecting portion, a mounting portion connected to the second connecting portion, and a first mounting hole formed through the mounting portion, the shape of the first slot matches the shape of the protrusion, the length of the mounting portion is less than half the length of the first clamp handle main body, the second hollow bolt is threadedly connected to the first mounting hole, and the second hollow bolt is used to install a second screw guide pin.

In a specific embodiment, the first connecting component also includes a first screw and a first fixing hole formed through the second connecting portion, the first sliding portion is clamped on the protrusion and can slide along the protrusion, and the first screw passes through the first fixing hole to abut the base to fix the first connecting component.

In a specific embodiment, the guide mechanism also includes a second connecting component detachably mounted on the slide groove portion, and a third hollow bolt connected to the second connecting component, the second connecting component includes a second sliding portion having a second slot, a third connecting portion vertically bent and extending from an end of the second sliding portion away from the calcaneus, a fourth connecting portion vertically bent and extending from the third connecting portion, a mounting block fixedly connected to the fourth connecting portion, and a second mounting hole opened at an end of the mounting block away from the second sliding portion, the shape of the second slot matches the shape of the protrusion, the length of the mounting block is greater than the length of the second clamp handle main body, the third hollow bolt is threadedly connected to the second mounting hole, and the third hollow bolt is used to install a third screw guide pin.

In a specific embodiment, the mounting block includes a first mounting block connected to the fourth connecting portion, and a second mounting block disposed at the end of the first mounting block and inclined toward the second clamp handle, and the second mounting hole is opened in the second mounting block.

In a specific embodiment, the second connecting component also includes a second screw and a second fixing hole formed through the fourth connecting portion, the second sliding portion is clamped on the protrusion and can slide along the protrusion, and the second screw passes through the second fixing hole to abut the base to fix the second connecting component.

In a specific embodiment, the first hollow bolt includes a first part inserted into the fixing ring and threadedly connected to the fixing ring, and a second part connected to the first part, the diameter of the second part is larger than the diameter of the first part, and the first hollow bolt also includes a groove formed by the surface of the second part away from the first part being recessed inward, a through hole formed by longitudinally penetrating a part of the groove bottom and the middle part of the second part, and a plurality of positioning holes arranged around the groove.

In a specific embodiment, the guide mechanism also includes a connecting rod with a guide pin hole, the connecting rod includes a connecting end with a plurality of positioning columns, a guide plate with the guide pin hole, and a rod body with two ends respectively connected to the connecting end and the guide plate, the plurality of positioning columns are inserted into the plurality of positioning holes, and the guide pin hole is used to install a fourth screw guide pin.

The beneficial effects of the utility model include at least:

1. The calcaneal fracture reduction device provided by the utility model comprises a first clamp handle, a second clamp handle arranged crosswise with the first clamp handle, a hinge bolt and a guide needle cylinder for fixing the angle between the first clamp handle and the second clamp handle, and a first hollow bolt, wherein the second clamp handle is used to be inserted into the patient's skin to clamp the bone, wherein the first clamp handle comprises a first clamp handle main body, a first clamp handle extension connected to the first clamp handle main body, and a fixing ring arranged at one end of the first clamp handle main body away from the first clamp handle extension, the first hollow bolt is threadedly connected to the fixing ring and is used to install the first screw guide needle; in this way, by tightening the first hollow bolt, pressure can be applied from the direction of screw guide needle implantation to bring the separated fracture fragments closer, and then the first screw guide needle is implanted through the first hollow bolt to guide the two separated fracture fragments. On the one hand, there is no need to provide an additional pressure device, and on the other hand, the device has the advantages of simple structure and good reduction effect.

2. The first connecting component and the second connecting component of the calcaneal fracture reduction device provided by the utility model are detachably connected to the first clamp handle and are both installed on the slide groove part. When in use, if the second screw guide needle is to be implanted, the first connecting component is installed, and if the second screw guide needle is to be implanted, the second connecting component is installed. After the installation is completed, both are directly removed without affecting the implantation of other screw guide needles, but at the same time, the two screw guide needles are guided so that the screw guide needles are implanted to the target position, thereby ensuring a better implantation effect.

3. The connecting rod of the calcaneal fracture reduction device provided by the utility model can be detachably installed on the first hollow bolt, and is installed only when the fourth screw guide needle is to be implanted. After the installation is completed, it can be directly removed without affecting the implantation of other screw guide needles. The fourth screw guide needle is guided to enable the fourth screw guide needle to be implanted to the target position, thereby ensuring a better implantation effect.

4. The calcaneal fracture reduction device provided by the utility model provides five screw guide pin implantation directions, and the screw guide pin can be implanted from different angles. Based on the guiding function provided by the calcaneal fracture reduction position, the five fracture fragments, namely the calcaneal tuberosity, the posterior calcaneal articular surface bone block, the talar process bone block, the anterior medial bone block and the anterolateral bone block, can be reduced, and has the advantages of wide application range and strong practicality.

In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of the calcaneal fracture reduction device provided by the present invention in one direction;

FIG2 is a schematic diagram of the three-dimensional structure of the calcaneal fracture reduction device provided by the present invention from another direction;

FIG3 is a schematic diagram of the three-dimensional structure of the first hollow bolt of the calcaneal fracture reduction device shown in FIG1 in one direction;

FIG4 is a schematic diagram of the three-dimensional structure of the first hollow bolt of the calcaneal fracture reduction device shown in FIG1 in another direction;

FIG5 is a schematic diagram of the three-dimensional structure of the first connecting component in one direction of the reset device provided by the utility model;

FIG. 6 is a schematic diagram of the three-dimensional structure of the second connecting assembly in one direction of the reset device provided by the present invention.

DETAILED DESCRIPTION

The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention can be defined and covered by various different implementations according to the claims.

The utility model provides a calcaneal fracture reduction device, which provides five screw guide pin implantation directions and can be applied to severe fracture situations. Specifically, when the calcaneal fracture includes at least two key fracture fragments, namely, the calcaneal tuberosity, the posterior calcaneal articular surface bone fragment, the talar process bone fragment, the anterior medial bone fragment and the anterolateral bone fragment, the calcaneal fracture reduction device provided by the utility model can be used for reduction.

It should be noted that the description of the front, back, medial and lateral positions of the fracture fragment is consistent with the human body's description of the foot. The heel corresponds to the back, the toes correspond to the front, the side where the big toe is located is the medial side, and the side where the little toe is located is the lateral side.

For ease of understanding, the screw guide pins implanted from five different directions are named the first screw guide pin, the second screw guide pin, the third screw guide pin, the fourth screw guide pin, and the fifth screw guide pin, wherein the first screw guide pin points from the anterolateral bone block to the anteromedial bone block, i.e., it is used to reposition the separated anterolateral bone block and the anteromedial bone block; the second screw guide pin points from the posterior talar articular surface bone block to the talar bone block, i.e., it is used to reposition the separated posterior talar articular surface bone block and the talar bone block; the third screw guide pin points from the posterior talar articular surface bone block to the talar bone block; The guide needle points from the posterolateral side of the calcaneal tuberosity to the talar bone block, that is, it is used to reposition the separated calcaneal tuberosity and the talar bone block; the fourth screw guide needle points from the posteromedial side of the calcaneal tuberosity to the anterolateral bone block corresponding to the bone entry point of the first screw guide needle, that is, it is used to reposition the separated calcaneal tuberosity and the anterolateral bone block; the fifth screw guide needle points from the proximal end of the calcaneal tuberosity beside the Achilles tendon to the anterolateral bone block or the bottom surface of the anteromedial bone block, and bypasses the long and short peroneus tendons, that is, it is used to reposition the separated calcaneal tuberosity and the anteromedial bone block.

Please refer to Figures 1 to 6. The calcaneal fracture reduction device includes a first clamp handle 10, a second clamp handle 20, a hinge bolt 30, and a guide mechanism. The first clamp handle 10 is used to install the guide mechanism. The second clamp handle 20 is used to be inserted into the patient's skin to clamp the bone and assist in fixing the position of the first clamp handle 10 to ensure that the guide mechanism connected to the first clamp handle 10 is installed at the target position. The hinge bolt 30 is used to hinge the first clamp handle 10 and the second clamp handle 20. The guide mechanism is used to guide multiple screw guide pins to be implanted.

The first pliers handle 10 includes a first pliers handle main body 11, a first pliers handle extension 12 connected to the first pliers handle main body 11, a slide groove 13 arranged at one end of the first pliers handle main body 11 close to the first pliers handle extension 12, a fixing ring 14 arranged at one end of the first pliers handle main body 11 away from the first pliers handle extension 12, and a first threaded hole and a first connecting hole opened in the first pliers handle extension 12.

In this embodiment, the first pliers handle main body 11 is an arc-shaped curved structure, which includes a first section gradually inclined away from the second pliers handle main body and a second section gradually inclined inward, the first section is connected to the first pliers handle extension, and the length of the second section is less than half of the length of the first section.

In this embodiment, the first handle extension portion 12 includes a first extension plate extending horizontally from one end of the first handle body 11 away from the fixing ring 14 in a direction away from the fixing ring 14 and a second extension plate extending outwardly by bending the first extension plate.

In this embodiment, the first threaded hole is formed in the first extension plate and penetrates the first extension plate along the thickness direction of the first extension plate. The first connection hole is formed in the second extension plate and penetrates the second extension plate along the thickness direction of the second extension plate.

The slide slot 13 includes a base 131 extending from the first clamp handle body 11 toward a direction away from the second clamp handle 20 , and a protrusion 132 extending from a middle portion of the base 131 toward a direction away from the base 131 .

In this embodiment, the slide groove portion 13 is used to cooperate with a guide mechanism.

In this embodiment, the fixing ring 14 is used to cooperate with the guide mechanism.

In this embodiment, the fixing ring 14 is used to locate the implantation direction of the first screw guide needle. The fixing ring 14 is a circular ring structure, and the direction of the central axis of the fixing ring 14 is the same as the implantation direction of the first screw guide needle.

In this embodiment, the inner wall of the fixing ring 14 is provided with threads.

The second clamp handle 20 includes a second clamp handle main body 21, a second clamp handle extension 22 connected to the second clamp handle main body 21, and a second threaded hole and a second connecting hole opened in the second clamp handle extension 22. The second clamp handle main body 21 is used to be inserted into the patient's skin, the second threaded hole is arranged opposite to the first threaded hole, and the second connecting hole is arranged opposite to the first connecting hole.

In this embodiment, the second clamp handle body 21 is inserted percutaneously, and one end of the second clamp handle body 21 away from the second clamp handle extension portion is in contact with the bone surface below the talar process, so that the clamping effect can be ensured.

In this embodiment, the second pliers handle main body 21 is an arc-shaped curved structure, including a third section gradually inclined away from the first pliers handle main body 11 and a fourth section gradually inclined inward.

In this embodiment, the width of the second handle body 21 gradually decreases from the second handle extension 22 to the second handle body 21, and the end of the fourth section away from the third section is pointed, so that it is convenient to insert into the patient's skin.

The hinge bolt 30 is inserted into the first threaded hole and the second threaded hole to hinge the first clamp handle 10 and the second clamp handle 20 .

The guide mechanism includes a first hollow bolt 41 threadedly connected to the fixing ring 14, a guide needle tube 42 inserted into the first connecting hole and the second connecting hole, a first connecting component 43, a second hollow bolt threadedly connected to the first connecting component 43, a second connecting component 45, a third hollow bolt threadedly connected to the second connecting component 45, a connecting rod 47, and a fourth hollow bolt threadedly connected to the second connecting component 45.

The first hollow bolt 41 is used to install a first screw guide pin. The first hollow bolt 41 is threadedly connected to the fixing ring 14. Tightening the first hollow bolt 41 toward the calcaneus can pressurize the anterolateral bone block 105 and the anteromedial bone block 104 to reset the two.

In this embodiment, the first hollow bolt 41 includes a first portion 411 inserted into the fixing ring 14 and threadedly connected to the fixing ring 14, and a second portion 412 connected to the first portion 411, the diameter of the second portion 412 is larger than the diameter of the first portion 411, and the first hollow bolt 41 also includes a groove 413 formed by a surface of the second portion 412 away from the first portion 411, a through hole 414 formed by longitudinally penetrating a portion of the bottom of the groove 413 and the middle portion of the second portion 412, and a plurality of positioning holes 415 arranged around the groove 413.

It can be understood that the outer wall of the first part 411 is provided with threads, and the first part 411 is inserted into the fixing ring 14 and is threadedly connected with the fixing ring 14 .

In this embodiment, both the first portion 411 and the second portion 412 are cylindrical structures, and the length of the first portion 411 is greater than the length of the second portion 412 .

In this embodiment, the cross section of the groove 413 is a regular hexagon, and the diameter of the groove 413 gradually decreases from the second portion 412 to the first portion 411 .

The first screw guide pin passes through the through hole 414 .

The plurality of positioning holes 415 are used to connect with the connecting rod of the guide mechanism.

In this embodiment, the positioning holes 415 are circular holes, and the number of the positioning holes 415 is three, and the three positioning holes 415 are evenly spaced.

Preferably, the structures of the second hollow bolt, the third hollow bolt and the fourth hollow bolt are the same as the structure of the first hollow bolt 41. It should be noted that the same structure means that they are all composed of a cylindrical first part and a second part, a groove and a through hole, but the diameters of the first part and the second part, and the diameter of the through hole may be the same or different.

In this embodiment, when the second hollow bolt, the third hollow bolt and the fourth hollow bolt are exactly the same as the first hollow bolt 41, it can be understood that they are prepared using the same mold, and can also be understood as being directly replaceable with each other. For the convenience of description, the four hollow bolts with exactly the same structure are named target hollow bolts. Since the screw guide pins to be implanted do not need to be implanted at the same time, the calcaneal fracture reduction device can also include only one target hollow bolt. In this way, when the screw guide pin is implanted, the target hollow bolt can be reused.

That is, in the utility model, the calcaneal fracture reduction device includes a first hollow bolt, a second hollow bolt, a third hollow bolt and a fourth hollow bolt, which have exactly the same structure and can be used interchangeably when any two of them have exactly the same size. It can be understood that when the first hollow bolt and the second hollow bolt/the third hollow bolt/the fourth hollow bolt have exactly the same size, the second hollow bolt/the third hollow bolt/the fourth hollow bolt refers to the first hollow bolt.

In other embodiments, the structures of the second hollow bolt, the third hollow bolt and the fourth hollow bolt may also be different from the structure of the first hollow bolt 41. The second hollow bolt, the third hollow bolt 4 and the fourth hollow bolt only need to have threads on the outer wall and a through hole in the middle to have the functions of pressurizing and installing screw guide pins.

In this embodiment, the guide needle tube 42 has two functions. The first function is to fix the angle between the first clamp handle body 11 and the second clamp handle body 21 together with the hinge bolt 30, that is, after the hinge bolt 30 is inserted into the first bolt hole and the second bolt hole and locked, the guide needle tube 42 is inserted into the first connecting hole and the second connecting hole, and the distance/angle between the first clamp handle body and the second clamp handle body cannot be changed; the second function is to guide the guide needle for the fifth screw.

Preferably, the needle guide cylinder 42 comprises a connecting cylinder 421 inserted into the first connecting hole and the second connecting hole, and a guide cylinder 422 connected to the connecting cylinder 421 , and the central axis of the guide cylinder 422 is perpendicular to the central axis of the connecting cylinder 421 .

In this embodiment, the connecting cylinder 421 is a cylindrical structure.

In this embodiment, the guide cylinder 422 includes a cylindrical cylinder body and a guide hole formed through two bottom surfaces of the cylinder body, and the guide hole is used to install the fifth screw guide needle.

In this embodiment, the central axis of the cylinder body, the central axis of the guide hole and the central axis of the guide cylinder 422 coincide with each other, that is, the cylinder body, the guide hole and the guide cylinder are coaxially arranged.

The fifth screw guide needle passes through the guide hole, and the implantation direction of the fifth screw guide needle is the same as the direction of the central axis of the guide cylinder 422.

In this embodiment, the first connecting component 43 is detachably connected to the first clamp handle 10, and the second hollow bolt for installing the second screw guide needle is installed on the first connecting component 43. In this way, the first clamp handle 10 serves as a basic bracket, and the second hollow bolt is installed by setting up the first connecting component 43. After the second screw guide needle is implanted, the first connecting component 43 can be directly disassembled, which has the advantage of convenient operation.

The first connecting component 43 includes a first sliding portion 431 having a first slot, a first connecting portion 432 extending vertically from an end of the first sliding portion 431 away from the calcaneus, a second connecting portion 433 extending vertically from the first connecting portion 432, a mounting portion 434 connected to the second connecting portion 433, a first mounting hole 435 formed through the mounting portion 434, a first fixing hole 436 formed through the second connecting portion 433, and a first screw inserted into the first fixing hole 436, the shape of the first slot matches the shape of the protrusion 132, and the length of the mounting portion 434 is less than half the length of the first clamp handle body.

In this embodiment, the first sliding portion 431 is a U-shaped structure, which can be clamped on the protrusion 132 and can slide along the protrusion 132 to change its position. When the position of the first sliding portion 431 is determined, it is fixed by a first screw.

In this embodiment, the first connection portion 432 abuts against an upper surface of the base 131 of the slide groove portion 13 that faces the protrusion 132 .

In this embodiment, the second connecting portion 433 abuts against the side of the base of the slide groove portion 13 away from the calcaneus, the first fixing hole 436 penetrates the second connecting portion 433 along the thickness direction, and the first screw passes through the first fixing hole 436 and abuts against the base to fix the position of the first connecting component 43 and the first clamp handle 10.

In this embodiment, the mounting portion 434 is a block-shaped structure, including a mounting portion lower surface facing the calcaneus and a mounting portion upper surface arranged opposite to the mounting portion lower surface, and the first mounting hole 435 is formed through the mounting portion upper surface and the mounting portion lower surface.

The second hollow bolt is installed in the first mounting hole 435 and is threadedly connected to the first mounting hole 435. The second hollow bolt is used to install a second screw guide pin. The implantation direction of the second screw guide pin is the same as the direction of the central axis of the second hollow bolt.

In this embodiment, the second connecting component 45 is detachably connected to the first clamp handle 10, and the third hollow bolt for installing the third screw guide pin is installed on the second connecting component 45. In this way, the first clamp handle 10 serves as a basic bracket, and the second connecting component 45 is set up to install the third hollow bolt. After the third screw guide pin is implanted, the second connecting component 45 can be directly disassembled, which has the advantage of convenient operation.

The second connecting component 45 includes a second sliding portion 451 having a second slot, a third connecting portion 452 extending vertically from an end of the second sliding portion 451 away from the calcaneus, a fourth connecting portion 453 extending vertically from the third connecting portion 452, a mounting block 454 fixedly connected to the fourth connecting portion 453, a second mounting hole 455 opened at an end of the mounting block 454 away from the second sliding portion 451, a second fixing hole 456 formed through the fourth connecting portion 453, a second screw inserted into the second fixing hole 456, and a third mounting hole 457 opened at an end of the mounting block 454 close to the second sliding portion 451, the shape of the second slot matches the shape of the protrusion 132, and the length of the mounting block 454 is greater than the length of the first clamp handle body 11.

In this embodiment, the second sliding portion 451 is a U-shaped structure, which can be clamped on the protrusion 132 and can slide along the protrusion 132 to change its position. When the position of the second sliding portion 451 is determined, it is fixed by a second screw.

In this embodiment, the third connection portion 452 abuts against an upper surface of the base 131 of the slide groove portion 13 facing the protrusion 132 .

In this embodiment, the fourth connecting portion 453 abuts against the side of the base of the slide groove portion 13 away from the calcaneus, the second fixing hole 456 is arranged through the fourth connecting portion 453 along the thickness direction, and the second screw passes through the second fixing hole 456 and abuts against the base to fix the position of the second connecting component 45 and the first clamp handle 10.

Preferably, the mounting block 454 includes a first mounting block connected to the fourth connecting portion 45 , and a second mounting block disposed at the end of the first mounting block and inclined toward the second clamp handle.

In this embodiment, the central axis direction of the second mounting block is the same as the implantation direction of the third screw guide pin.

The second mounting hole 455 is formed in the second mounting block and penetrates the second mounting block along a thickness direction thereof.

The third hollow bolt is installed in the second mounting hole 455 and is threadedly connected to the second mounting hole 455. The third hollow bolt is used to install a third screw guide pin. The implantation direction of the third screw guide pin is the same as the direction of the central axis of the third hollow bolt.

In this embodiment, the third mounting hole 457 is formed at an end of the first mounting block away from the second mounting block.

In this embodiment, the third mounting hole 457 is used to install the fourth hollow bolt. The screw guide needle to be implanted can be passed through the fourth hollow bolt and guided by the fourth hollow bolt. The central axis of the fourth hollow bolt is perpendicular to the skin surface.

It should be noted that the first connecting component 43 and the second connecting component 45 are both installed in the slide groove portion 13, and the two will not be installed at the same time. When the second screw guide needle is to be implanted, the first connecting component 43 is installed in the slide groove portion 13, and after the implantation is completed, the first connecting component 43 is removed; when the third screw guide needle is to be implanted, the second connecting component 45 is installed in the slide groove portion 13, and after the implantation is completed, the second connecting component 45 is removed.

In the present invention, the first connecting component 43 and the second connecting component 45 are both detachably mounted on the slide groove portion 13, so that the calcaneal fracture reduction device can implant screw guide pins at multiple angles and has a simple structure.

In the present invention, the connecting rod 47 is detachably mounted on the first hollow bolt 41 , and the connecting rod 47 is used to guide the fourth screw guide pin.

The connecting rod 47 includes a connecting end 471 having a plurality of positioning columns, a guide plate 472 spaced apart from the connecting end 471, a guide pin hole 473 formed through the guide plate 472, and a rod body 474 whose two ends are respectively connected to the connecting end 471 and the guide plate 472, and the positioning columns are inserted into the positioning holes of the first hollow bolts.

In this embodiment, the connecting end 471 includes a connecting body connected to the rod body 474 and a plurality of positioning columns extending from the connecting body. The plurality of positioning columns are inserted into the positioning holes, so that the connecting rod 47 forms a detachable connection with the first hollow bolt, and at the same time, the position of other parts connected to the connecting end 471 is fixed.

In this embodiment, the number of the positioning posts is three, which is the same as the number of the positioning holes.

In this embodiment, the shape of the guide plate 472 is not limited, and can be a rectangular plate with a certain thickness, a circular plate with a certain thickness, or an irregular shape, as long as it can open the guide pin hole 473.

In this embodiment, the guide pin hole 473 penetrates the guide plate 472 along the thickness direction of the guide plate 472, the guide pin hole 473 is a circular hole, and the central axis of the guide pin hole 473 is located on the same straight line as the implantation direction of the fourth screw guide pin.

In this embodiment, the rod body 474 is used to connect the connecting column 471 and the guide plate 472. The shape of the rod body 474 is not limited and can be L-shaped, W-shaped, or a straight rod body.

In this embodiment, the rod body 474 is L-shaped, and the rod body arranged horizontally and the rod body arranged vertically are connected by an arc-shaped transition.

When the fourth screw guide needle is to be implanted, the positioning column of the connecting rod 47 is inserted into the positioning hole of the first hollow bolt 41, so that the connecting rod 47 forms a connection relationship with the first clamp handle 10 and the position is fixed, and the fourth screw guide needle passes through the guide needle hole 473 to fix the implantation direction.

In the present invention, five screw guide pin implantation directions are provided, and the first connecting component 43, the second connecting component 45 and the connecting rod 47 are all detachably connected to the first clamp handle 10. In this way, when the screw guide pin is implanted, the structure of the calcaneal fracture reduction device is relatively simple, without the influence of redundant components, and the operation is relatively convenient.

The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions and substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims (10)

1. A calcaneal fracture reduction device, comprising: A first pliers handle, the first pliers handle comprising a first pliers handle main body, a first pliers handle extension connected to the first pliers handle main body, a fixing ring disposed at one end of the first pliers handle main body away from the first pliers handle extension, and a first threaded hole and a first connecting hole provided in the first pliers handle extension; A second clamp handle, the second clamp handle comprising a second clamp handle main body, a second clamp handle extension connected to the second clamp handle main body, and a second threaded hole and a second connecting hole provided in the second clamp handle extension, the second clamp handle main body is used to be inserted into the patient's skin, the second threaded hole is arranged opposite to the first threaded hole, and the second connecting hole is arranged opposite to the first connecting hole; A hinge bolt, wherein the hinge bolt is inserted into the first threaded hole and the second threaded hole to hinge the first clamp handle and the second clamp handle; The guiding mechanism comprises a first hollow bolt threadedly connected to the fixing ring, and a guide needle cylinder inserted into the first connecting hole and the second connecting hole, the first hollow bolt is used to install a first screw guide needle, and the angle between the first clamp handle main body and the second clamp handle main body is locked by the hinge bolt and the guide needle cylinder. 2. The calcaneal fracture reduction device according to claim 1 is characterized in that the guide needle tube includes a connecting cylinder body inserted into the first connecting hole and the second connecting hole, and a guide cylinder body connected to the connecting cylinder body and perpendicular to each other, the guide cylinder body includes a cylindrical cylinder body body, and a guide hole formed through two bottom surfaces of the cylinder body, and the guide hole is used to install the fifth screw guide needle. 3. The calcaneal fracture reduction device according to claim 1 or 2 is characterized in that the second handle also includes a slide groove portion arranged at one end of the second handle main body near the second handle extension portion, and the slide groove portion includes a base extending from the second handle main body in a direction away from the first handle, and a protrusion extending from the middle part of the base in a direction away from the base. 4. The calcaneal fracture reduction device according to claim 3 is characterized in that the guiding mechanism also includes a first connecting component detachably mounted on the sliding groove portion, and a second hollow bolt connected to the first connecting component, the first connecting component includes a first sliding portion with a first slot, a first connecting portion extending vertically from one end of the first sliding portion, a second connecting portion extending vertically from the first connecting portion, a mounting portion connected to the second connecting portion, and a first mounting hole formed through the mounting portion, the shape of the first slot matches the shape of the protrusion, the length of the mounting portion is less than half the length of the first clamp handle main body, the second hollow bolt is threadedly connected to the first mounting hole, and the second hollow bolt is used to install a second screw guide pin. 5. The calcaneal fracture reduction device according to claim 4 is characterized in that the first connecting component also includes a first screw and a first fixing hole formed through the second connecting portion, the first sliding portion is clamped on the protrusion and can slide along the protrusion, and the first screw passes through the first fixing hole to abut the base to fix the first connecting component. 6. The calcaneal fracture reduction device according to claim 3 is characterized in that the guiding mechanism also includes a second connecting component detachably mounted on the sliding groove portion, and a third hollow bolt connected to the second connecting component, the second connecting component includes a second sliding portion with a second slot, a third connecting portion extending vertically bent from an end of the second sliding portion away from the calcaneal bone, a fourth connecting portion extending vertically bent from the third connecting portion, a mounting block fixedly connected to the fourth connecting portion, and a second mounting hole opened at an end of the mounting block away from the second sliding portion, the shape of the second slot matches the shape of the protrusion, the length of the mounting block is greater than the length of the first clamp handle main body, the third hollow bolt is threadedly connected to the second mounting hole, and the third hollow bolt is used to install a third screw guide pin. 7. The calcaneal fracture reduction device according to claim 6 is characterized in that the mounting block includes a first mounting block connected to the fourth connecting portion, and a second mounting block arranged at the end of the first mounting block and inclined toward the second clamp handle, and the second mounting hole is opened in the second mounting block. 8. The calcaneal fracture reduction device according to claim 6 is characterized in that the second connecting component also includes a second screw and a second fixing hole formed through the fourth connecting part, the second sliding part is clamped on the protrusion and can slide along the protrusion, and the second screw passes through the second fixing hole to abut the base to fix the second connecting component. 9. The calcaneal fracture reduction device according to claim 1 is characterized in that the first hollow bolt includes a first part inserted into the fixing ring and threadedly connected to the fixing ring, and a second part connected to the first part, and the diameter of the second part is larger than the diameter of the first part; the first hollow bolt also includes a groove formed by the surface of the second part away from the first part, a through hole formed by longitudinally penetrating a part of the groove bottom and the middle part of the second part, and a plurality of positioning holes arranged around the groove. 10. The calcaneal fracture reduction device according to claim 9 is characterized in that the guide mechanism also includes a connecting rod with a guide pin hole, the connecting rod includes a connecting end with a plurality of positioning columns, a guide plate with the guide pin hole, and a rod body with two ends respectively connected to the connecting end and the guide plate, a plurality of the positioning columns are inserted into a plurality of the positioning holes, and the guide pin hole is used to install a fourth screw guide pin.