Calcaneal fracture closed repositor

Abstract

The utility model relates to the technical field of fracture reduction mechanisms, and discloses a calcaneal fracture closed reduction device which comprises a first screw needle, a second screw needle, a third screw needle, a transverse support, an inclined supporting frame, a swinging force frame, a prying and poking needle and calcaneal tissue. The first screw needle, the second screw needle and two transverse supports with the surfaces in threaded sleeving connection form a frame structure, a longitudinal rod integrally arranged in the middle of each transverse support is rotationally connected with one end of a swing force frame, the other end of the swing force frame is in threaded sleeving connection with the surface of a third screw needle, and the two ends of the second screw needle are rotationally sleeved with inclined supporting frames. The downward side face of the inclined supporting frame is connected with the surface of the third screw pin in a clamped mode. The calcaneal fracture closed repositor solves the problems that in the prior art, a repositor only limits recovery of the inner side wall, the outer side wall, the inward turning angle and the outward turning angle of the calcaneus, the length and the height of the calcaneus cannot be recovered due to the collapse condition existing after soft tissue damage, and consequently post-operation sequelae are still serious.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture reduction mechanisms, in particular to a closed reduction device for calcaneal fractures. Background Art

[0002] Calcaneus fractures account for about 2% of all fractures and about 60% of tarsal fractures. They are mostly caused by instantaneous and powerful high-energy trauma. Depending on the violence suffered by the calcaneus, the types of fractures formed clinically are varied, and their classifications are also varied. Sanders classification is commonly used in clinical practice to guide treatment plans. The treatment goal of calcaneal fractures is to restore the morphology of the entire joint, especially the height, length and width of the calcaneus. It should be noted that there is a certain degree of torsion between the calcaneal tuberosity and the entire joint and the medial and lateral cortices. If this relative position is not restored, even if the anatomical reduction is performed during surgery, the calcaneus will not be completely healed. The joint is still unable to restore its movement to normal; calcaneal fractures are often treated with surgery, which mainly includes minimally invasive internal fixation and open internal fixation. Open internal fixation can be reduced under direct vision, so severe calcaneal fractures are usually treated with this treatment method to reduce fracture sequelae. However, severe calcaneal fractures are often accompanied by heavier skin and soft tissue injuries, so that complications such as skin infection and necrosis are prone to occur after surgery. According to literature reports, the incidence of skin necrosis after calcaneal fracture surgery can be as high as 43%. This is an issue that every clinician cannot ignore. Therefore, how to improve the effect of closed reduction of calcaneal fractures is the goal pursued by orthopedic physicians.

[0003] During calcaneal fracture surgery, a reducer is needed to support the calcaneal fracture. However, with the current existing technology, the reducer is limited to restoring the medial and lateral walls of the calcaneus and the inversion and eversion angles. Due to the collapse of the soft tissue after damage, it is unable to restore the length and height of the calcaneus, so that the postoperative sequelae are still relatively serious. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a closed reducer for calcaneal fractures, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions: a closed reduction device for calcaneal fracture, comprising: a first screw pin, a second screw pin, a third screw pin, a horizontal bracket, an oblique support bracket, a swing force bracket, a prying pin and calcaneal tissue;

[0006] The first screw pin, the second screw pin and the two cross brackets with threaded sleeves on their surfaces form a frame structure, the longitudinal rod integrally arranged in the middle of the cross bracket is rotatably connected to one end of the swing frame, the other end of the swing frame is threadedly sleeved on the surface of the third screw pin, both ends of the second screw pin are rotatably sleeved with an oblique support frame, and the downward side surface of the oblique support frame is clamped with the surface of the third screw pin;

[0007] The first screw needle, the second screw needle and the third screw needle are all inserted into the calcaneal tissue, the prying needle passes half of the top of the third screw needle and is inserted into the calcaneal tissue, and the prying needle is pressed on the third screw needle under the pulling of the calcaneal tissue skin tissue.

[0008] Preferably, the first screw needle includes a needle body, with the center of the needle body as the axis of symmetry, and external screw holes symmetrically arranged at both ends, the side thread of the cross bracket close to the end is sleeved on the external screw hole, and both ends of the needle body passing the external screw hole are integrally polished with smooth turning rods, and one end of the needle body is set to be sharp.

[0009] Preferably, the first screw needle, the second screw needle and the third screw needle are three needle-shaped components with the same structural structure, and the distance between the two outer screw openings on the third screw needle is smaller than the distance between the two outer screw openings on the first screw needle and the second screw needle.

[0010] Preferably, the diagonal support frame includes a support rod, a plurality of slots are evenly formed on the surface of the support rod, a transfer hole is formed on the surface of the support rod near the end, and the transfer hole is located at the bottom end of the support rod, and the inner wall of the transfer hole is rotatably connected to the surface of the second screw pin.

[0011] Preferably, the inner wall of the slot near the bottom end is inclined to slide outward.

[0012] Preferably, the cross bracket comprises a support rod and an extension rod, and inner screw holes are formed on the surfaces of both ends of the support rod and the extension rod away from each other, and a limit slide is integrally provided at one end of the support rod close to the extension rod, and the limit slide is hexagonal prism-shaped as a whole, and an extension sleeve is slidably provided on the surface of the limit slide, and the shape of the inner wall of the extension sleeve is adapted to the shape of the surface of the limit slide, and the extension sleeve is connected to the extension rod, and an outward-expanded positioning ring is integrally formed at the outer edge of the end of the extension sleeve away from the extension rod, and an adjusting cap is rotatably sleeved on the positioning ring, and the inner wall of the adjusting cap is threaded, and the adjusting cap is threadedly sleeved on the surface of the support rod, and the surface of the adjusting cap is set to be hexagonal prism-shaped, and a short shaft piece is integrally provided on the surface of the support rod close to the middle, and the passages on the inner walls of the inner screw holes on the support rod and the extension rod are in the same direction, and the swing frame is rotatably sleeved on the short shaft piece.

[0013] Preferably, the swing force frame includes a swing rod, and the surfaces of the swing rod close to both ends are respectively provided with a swing screw hole and a swing hole, the inner wall of the swing screw hole is threadedly sleeved on the second screw pin, and the inner wall of the swing hole is rotatably sleeved on the cross bracket.

[0014] Preferably, the first screw needle, the second screw needle, the third screw needle and the prying needle are all Kirschner wires.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The closed reducer for calcaneal fracture supports the closed part of the calcaneus by using a frame composed of a first screw pin, a second screw pin and a cross bracket, and then an oblique support frame, a swing frame and a third screw pin are arranged to support the skin and soft tissue to avoid skin collapse after the recovery of the calcaneal fracture. In addition, the third screw pin is compressed by a prying pin, so that the reducer as a whole can automatically pull the reducer support according to the contraction of the patient's calcaneal skin, thereby avoiding skin collapse affecting the recovery of the calcaneus, thereby achieving the effect of restoring the length and height of the calcaneus, and further reducing the sequelae of the operation.

[0017] 2. The closed reducer for calcaneal fracture uses the elasticity of the skin itself to form a resistance force to push the diagonal support frame to tilt, and then forms a triangular structure by arranging a cross support, a diagonal support frame and a swing frame. Then, the prying needle is used to lift the skin soft tissue and place it on the triangular structure, so that the reducer has sufficient supporting force to assist the recovery of the calcaneal fracture and reduce the pressure caused by the skin soft tissue on the calcaneal fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the lateral support structure of the calcaneal tissue of the utility model;

[0020] Figure 3 This is a schematic diagram of the first screw pin structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the diagonal brace of the utility model;

[0022] Figure 5 This is a schematic diagram of the disassembled structure of the transverse bracket of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the swing frame of the utility model.

[0024] In the figure: 1. first screw needle; 11. needle body; 12. outer screw mouth; 13. rotating rod; 2. second screw needle; 3. third screw needle; 4. horizontal bracket; 41. support rod; 42. extension rod; 43. inner screw hole; 44. short shaft; 45. extension sleeve; 46. limit slider; 47. adjustment cap; 5. diagonal support frame; 51. support rod; 52. slot; 53. adapter hole; 6. swing force frame; 61. swing rod; 62. swing screw hole; 63. swing rotating hole; 7. prying needle; 8. calcaneal tissue. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6 , a closed reducer for calcaneal fracture, comprising: a first screw pin 1, a second screw pin 2, a third screw pin 3, a transverse support 4, an oblique support frame 5, a swing force frame 6, a prying pin 7 and calcaneal tissue 8;

[0027] The first screw pin 1 and the second screw pin 2 are connected to the two transverse brackets 4 with threads on their surfaces to form a frame structure. The longitudinal rod integrally arranged in the middle of the transverse bracket 4 is rotatably connected to one end of the swing frame 6. The other end of the swing frame 6 is threadedly connected to the surface of the third screw pin 3. Both ends of the second screw pin 2 are rotatably connected to the diagonal bracket 5. The downward side of the diagonal bracket 5 is clamped with the surface of the third screw pin 3.

[0028] The first screw needle 1, the second screw needle 2 and the third screw needle 3 are all inserted into the calcaneal tissue 8, the prying needle 7 passes over half of the top of the third screw needle 3 and is inserted into the calcaneal tissue 8, and the prying needle 7 is pressed on the third screw needle 3 under the pulling of the skin tissue of the calcaneal tissue 8.

[0029] Among them; the first screw needle 1 includes a needle body 11, the needle body 11 takes the center as the symmetry axis, and has external screw holes 12 symmetrically arranged at both ends. The side thread of the cross bracket 4 near the end is sleeved on the external screw hole 12, and both ends of the needle body 11 passing through the external screw hole 12 are integrally polished with a smooth turning rod 13. One end of the needle body 11 is set to be sharp, and the external screw hole 12 is set to enable the cross bracket 4 and the first screw needle 1 to be installed, which is convenient for subsequent direct disassembly.

[0030] Among them; the first screw needle 1, the second screw needle 2 and the third screw needle 3 are three needle-shaped components with the same structural structure. The distance between the two external screw holes 12 on the third screw needle 3 is smaller than the distance between the two external screw holes 12 on the first screw needle 1 and the second screw needle 2. After the first screw needle 1, the second screw needle 2 and the third screw needle 3 are respectively taken out by rotation, the reducer as a whole will be in a disassembled state, which is convenient for the structures thereon to be pulled out of the body respectively.

[0031] Among them; the diagonal support frame 5 includes a support rod 51, a plurality of slots 52 are evenly opened on the surface of the support rod 51, a transfer hole 53 is opened on the surface of the support rod 51 near the end, and the transfer hole 53 is located at the bottom end of the support rod 51, and the inner wall of the transfer hole 53 is rotatably connected with the surface of the second screw needle 2, and the elasticity of the skin itself is used to form a resistance force to push the diagonal support frame 5 to tilt, so that the diagonal support frame 5 can be pressed on the third screw needle 3, thereby forming a supporting force.

[0032] Among them, the inner wall of the card slot 52 near the bottom end is inclined to slide outward, and after giving the diagonal support frame 5 an upward pulling force, the card connection position of the third screw pin 3 and the diagonal support frame 5 can be replaced as the soft tissue recovers.

[0033] Among them, the cross bracket 4 includes a support rod 41 and an extension rod 42. The surfaces of the two ends of the support rod 41 and the extension rod 42 that are away from each other are provided with internal screw holes 43. The end of the support rod 41 close to the extension rod 42 is integrally provided with a limit slider 46. The limit slider 46 is a hexagonal prism as a whole. The surface of the limit slider 46 is slidably provided with an extension sleeve 45. The shape of the inner wall of the extension sleeve 45 is adapted to the shape of the surface of the limit slider 46. The extension sleeve 45 is connected to the extension rod 42. The outer edge of the end of the extension sleeve 45 away from the extension rod 42 is integrally formed with an outward-expanded positioning ring, and an adjusting sleeve is rotatably sleeved on the positioning ring. The inner walls of the section cap 47 and the adjusting cap 47 are provided with threads, and the adjusting cap 47 is threadedly sleeved with the surface of the support rod 41. The surface of the adjusting cap 47 is arranged in a hexagonal prism shape. The surface of the support rod 41 near the middle is integrally provided with a short shaft member 44, and the direction of the passages on the inner walls of the inner screw holes 42 on the support rod 41 and the extension rod 42 are consistent. The swing frame 6 is rotatably sleeved on the short shaft member 44. While the cross bracket 4 is used to fix the calcaneal fracture, the support rod 41 and the extension rod 42 can adjust their extended lengths according to the position of the calcaneal length reduction, thereby better supporting the calcaneus.

[0034] Among them, the swing frame 6 includes a swing rod 61, and the surfaces of the swing rod 61 near both ends are respectively provided with a swing screw hole 62 and a swing hole 63. The inner wall of the swing screw hole 62 is threadedly sleeved on the second screw needle 2, and the inner wall of the swing hole 63 is rotatably sleeved on the cross bracket 4. The swing of the swing frame 6 is adjusted according to the recovery of the calcaneal fracture to gradually relax the raised skin soft tissue to avoid the formation of bulges after recovery.

[0035] Among them, the first screw pin 1, the second screw pin 2, the third screw pin 3 and the prying pin 7 are all Kirschner wires. Kirschner wires, as a commonly used internal fixation material for fractures, have sufficient supporting capacity and are easy to remove after recovery.

[0036] Working principle: during calcaneal fracture surgery, the fracture site is first fixed with the cross bracket 4, and then the first screw pin 1, the second screw pin 2, the third screw pin 3, the diagonal support frame 5 and the swing frame 6 are inserted in sequence, and assembled in the body to form a bracket-like structure, and then the diagonal support frame 5 and the swing frame 6 are pulled, and the diagonal support frame 5 and the swing frame 6 are formed into a triangular structure through the third screw pin 3 and the cross bracket 4, and then the prying needle 7 is inserted to lift part of the soft tissue and then place it on the third screw pin 3. Finally, as the fracture gradually heals, the support height of the diagonal support frame 5 and the swing frame 6 is slowly adjusted; after the fracture heals, the first screw pin 1, the second screw pin 2 and the third screw pin 3 are rotated and pulled out respectively, so that the reducer can be quickly disassembled, which is convenient for the subsequent removal of other structures from the body in sequence.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed reducer for calcaneal fracture, characterized in that: include: A first screw needle (1), a second screw needle (2), a third screw needle (3), a horizontal support (4), an oblique support frame (5), a swing force frame (6), a prying needle (7), and calcaneal tissue (8); The first screw pin (1), the second screw pin (2) and the two transverse brackets (4) threadedly sleeved on their surfaces form a frame structure, a longitudinal rod integrally arranged in the middle of the transverse bracket (4) is rotatably connected to one end of a swing frame (6), the other end of the swing frame (6) is threadedly sleeved on the surface of the third screw pin (3), both ends of the second screw pin (2) are rotatably sleeved with an inclined support frame (5), and the downward side surface of the inclined support frame (5) is clamped with the surface of the third screw pin (3); The first screw needle (1), the second screw needle (2) and the third screw needle (3) are all inserted into the calcaneal tissue (8), the prying needle (7) passes over half of the top of the third screw needle (3) and is inserted into the calcaneal tissue (8), and the prying needle (7) is pressed on the third screw needle (3) under the pulling of the skin tissue of the calcaneal tissue (8).

2. A closed reducer for calcaneal fracture according to claim 1, characterized in that: The first screw needle (1) comprises a needle body (11), the center of the needle body (11) being a symmetry axis, and two ends of the needle body (11) being symmetrically provided with external screw holes (12), the side surface of the cross bracket (4) near the end being threadedly sleeved on the external screw hole (12), both ends of the needle body (11) passing over the external screw hole (12) are integrally polished with smooth rotating rods (13), and one end of the needle body (11) is arranged to be sharp.

3. A closed reducer for calcaneal fracture according to claim 2, characterized in that: The first screw needle (1), the second screw needle (2) and the third screw needle (3) are three needle-shaped components of the same structural structure, and the distance between the two external screw openings (12) on the third screw needle (3) is smaller than the distance between the two external screw openings (12) on the first screw needle (1) and the second screw needle (2).

4. A closed reducer for calcaneal fracture according to claim 1, characterized in that: The diagonal support frame (5) comprises a support rod (51), a surface of the support rod (51) is evenly provided with a plurality of slots (52), a surface of the support rod (51) close to an end thereof is provided with a transfer hole (53), and the transfer hole (53) is located at the bottom end of the support rod (51), and an inner wall of the transfer hole (53) is rotatably sleeved with a surface of the second screw pin (2).

5. A closed reducer for calcaneal fracture according to claim 4, characterized in that: The inner wall of the slot (52) near the bottom end is in an inclined shape that slides outwards.

6. The closed reducer for calcaneal fracture according to claim 1, characterized in that: The cross bracket (4) comprises a support rod (41) and an extension rod (42), and inner screw holes (43) are provided on the surfaces of both ends of the support rod (41) and the extension rod (42) which are away from each other. A limit slider (46) is integrally provided at one end of the support rod (41) close to the extension rod (42), and the limit slider (46) is in the shape of a hexagonal prism as a whole. An extension sleeve (45) is slidably provided on the surface of the limit slider (46), and the shape of the inner wall of the extension sleeve (45) is adapted to the shape of the surface of the limit slider (46). The extension sleeve (45) is connected to the extension rod (42), and the extension sleeve (46) is connected to the extension rod (42). 5) An outwardly expanded positioning ring is integrally formed at the outer edge of one end away from the extension rod (42), an adjusting cap (47) is rotatably sleeved on the positioning ring, the inner wall of the adjusting cap (47) is provided with a thread, and the adjusting cap (47) is threadedly sleeved with the surface of the support rod (41), the surface of the adjusting cap (47) is arranged in a hexagonal prism shape, a short shaft member (44) is integrally provided on the surface of the support rod (41) near the middle, and the passageways of the inner walls of the internal screw holes (43) on the support rod (41) and the extension rod (42) are in the same direction, and the swing force frame (6) is rotatably sleeved on the short shaft member (44).

7. The closed reducer for calcaneal fracture according to claim 1, characterized in that: The swing force frame (6) comprises a swing rod (61), and the surfaces of the swing rod (61) close to both ends are respectively provided with a swing screw hole (62) and a swing hole (63), the inner wall of the swing screw hole (62) is threadedly sleeved on the second screw pin (2), and the inner wall of the swing hole (63) is rotatably sleeved on the cross bracket (4).

8. The closed reducer for calcaneal fracture according to claim 1, characterized in that: The first screw needle (1), the second screw needle (2), the third screw needle (3) and the prying needle (7) are all Kirschner wires.

Images