A long tubular bone shortening osteotomy guide plate reset integrated device

Abstract

The application relates to the field of shortening osteotomy, in particular to a long tubular bone shortening osteotomy guide plate reset integrated device, which comprises an arc-shaped protection plate and a connecting strip connected to one end of the arc-shaped protection plate, a sliding sheet and a positioning sheet are connected to the connecting strip through magnetic attraction structures, the magnetic attraction structures comprise a sliding block arranged at the lower end of the sliding sheet and a positioning block arranged at the lower end of the positioning sheet, the sliding sheet and the positioning sheet are connected through a pulling mechanism, a driven sheet and a fixed sheet are further connected to the pulling mechanism, and the sliding sheet and the positioning sheet are arranged in one-to-one correspondence with the driven sheet and the fixed sheet. The device can not only avoid the cutting of soft tissues around the skeleton by the saw blade of the swing saw, but also ensure that the position of the saw blade of the swing saw does not deviate during the osteotomy process, and the length of the cut skeleton can be directly observed. Meanwhile, when the two osteotomy ends are close to each other, the rotation or angular misplacement of the two ends can be prevented, thereby helping the stable butt joint of the two end osteotomy surfaces.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shortening osteotomy, in particular to a long tubular bone shortening osteotomy guide plate and reduction integrated device. BACKGROUND

[0002] Long tubular bones include femur, ulna, etc., the abnormal length of which affects normal limb function, for example, the overlength of ulna often causes abnormal impact between the distal ulna and triquetrum, leading to wrist joint injury; when the lower limbs are not equal in length, the patient's gait is abnormal for a long time, leading to serious consequences such as pelvic tilt, hip dysplasia, and scoliosis. The above diseases usually require shortening osteotomy treatment of the overlength bone; at present, surgeons generally use a swing saw to cut off the bone by hand, then pull the cut end to the correct position and fix it with an osteosynthesis plate and screws, but this process is difficult to accurately control the length of the cut bone due to the sliding of the swing saw, which can easily damage the surrounding blood vessels and muscles and other soft tissues, and also easily cause the unevenness of the cut surface and the poor coaptation of the cut end, resulting in poor surgical results. In addition, due to the smooth surface of the bone, it is difficult to firmly hold the bone with conventional surgical tools such as crab pincers and bone holding forceps, which affects the stability of the cut end and thus affects the subsequent strong internal fixation. The publication number CN114176711A discloses a distal ulna osteotomy orthopedic surgery guide plate system, which is limited in length by the size of the short and long osteotomy grooves, i.e. only a fixed length of ulna can be cut by the short and long osteotomy grooves, and the applicability is limited. To solve this problem, the publication number CN222870618U discloses a ulna osteotomy surgery guide plate system, which can adjust the required osteotomy length according to the actual situation by cooperating the osteotomy guide plate including the guide plate body and the connecting plate with the ulna plate, has a wider range of applications, and can provide space for the linear motion trajectory of the osteotomy by the reset forceps with the kidney-shaped hole structure, preventing the problem of poor accuracy of the osteotomy and surface connection caused by arc motion.

[0003] However, the above prior art cannot prevent the saw blade of the swing saw from cutting the soft tissues around the bone, and it is also not convenient to ensure the stable docking of the cut surface, so there is a need for a long tubular bone shortening osteotomy guide plate and reduction integrated device to solve the above problems. SUMMARY

[0004] The present application aims to provide a long tubular bone shortening osteotomy guide plate and reduction integrated device to solve the problem of the existing long tubular bone osteotomy surgery guide plate that cannot prevent the saw blade from cutting the tissues around the bone and is not convenient to ensure the stable docking of the cut surface.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The application discloses a long tubular bone shortening and cutting guide plate reset integrated device, which comprises an arc-shaped protection plate and a connecting strip connected to one end of the arc-shaped protection plate, a sliding sheet and a positioning sheet are connected to the connecting strip through magnetic attraction structures, the magnetic attraction structures comprise sliding blocks arranged at lower ends of the sliding sheet and positioning blocks arranged at lower ends of the positioning sheet, the sliding sheet and the positioning sheet are connected through a pulling mechanism, a driven sheet and a fixed sheet are further connected to the pulling mechanism, the sliding sheet and the positioning sheet are arranged in one-to-one correspondence with the driven sheet and the fixed sheet respectively, positioning holes are arranged on the driven sheet, the sliding sheet, the positioning sheet and the fixed sheet and penetrate through both sides of the driven sheet, the sliding sheet, the positioning sheet and the fixed sheet, arc-shaped positioning strips are fixedly connected between the driven sheet and the sliding sheet and between the positioning sheet and the fixed sheet, strip-shaped holes are arranged on the positioning strips for the saw blade to penetrate through, and a limiting mechanism for limiting the driven sheet and the sliding sheet is arranged on the pulling mechanism.

[0007] Preferably, a scale bar is engraved on the side surface of the connecting strip, and a scale mark is arranged on the sliding sheet and used for comparison with the scale bar.

[0008] Preferably, the magnetic attraction structures further comprise positioning grooves and sliding grooves arranged on the surface of the connecting strip, the positioning grooves are fixedly connected with the positioning blocks through magnetic attraction, and the sliding grooves are slidingly connected with the sliding blocks through magnetic attraction.

[0009] Preferably, the pulling mechanism comprises L-shaped support plates arranged on the positioning sheet and the fixed sheet, a transmission plate is connected to the outer side of the upper end of each support plate through a protrusion, and the upper ends of the two transmission plates are connected through an n-shaped handle type driving rod.

[0010] Preferably, the pulling mechanism further comprises support sheets connected to the lower ends of the two transmission plates, the two support sheets are respectively movably inserted into the interiors of the lower ends of the corresponding transmission plates, one end of a connecting plate is connected to each support sheet through a shaft, and the driven sheet and the sliding sheet are fixedly connected to the other end of the corresponding connecting plate.

[0011] Preferably, the transmission plate is a broken line shape, and the distance between the lower end of the transmission plate and the rotation center of the transmission plate is smaller than the distance between the upper end of the transmission plate and the rotation center of the transmission plate.

[0012] Preferably, the two ends of the handle type driving rod are in sheet structures, and the sheet structures at the two ends of the handle type driving rod are movably inserted into the inner sides of the upper ends of the corresponding transmission plates.

[0013] Preferably, a torsional spring for resetting the transmission plate is further arranged between the protrusion on the outer side of the upper end of the transmission plate and the corresponding support plate.

[0014] Preferably, the limiting mechanism comprises L-shaped limiting sheets arranged on the outer sides of each support sheet, the limiting sheets extend to the outer sides of the lower ends of the corresponding transmission plates, and the outer sides of the lower ends of the transmission plates and the inner sides of the corresponding limiting sheets are connected through limiting male teeth and limiting female teeth.

[0015] Preferably, the limiting male teeth and the limiting female teeth are equidistantly distributed on the inner side of the limiting sheet and the lower end of the transmission plate respectively, and the limiting sheet is made of elastic metal material, and the limiting male teeth and the limiting female teeth are all right-angle teeth, which are used to make the limiting sheet and the corresponding transmission plate only move in one direction.

[0016] Compared with the prior art, the long tubular bone shortening osteotomy guide plate resetting integrated device can not only avoid the saw blade of the swing saw from cutting the soft tissue around the bone, but also ensure that the position of the saw blade of the swing saw does not deviate during the osteotomy process, and the length of the cut bone can be directly observed, and the two ends of the cut bone can be prevented from rotating or being misaligned when the two ends are moved close to each other, thereby helping to stably butt the two ends of the cut bone surface:

[0017] 1. The arc-shaped protective plate penetrates the ulna or the femur from below, thereby temporarily isolating the bone from the soft tissue around the bone, and when the swing saw is used for osteotomy, the saw blade of the swing saw can only contact the arc-shaped protective plate and cannot contact the soft tissue isolated by the arc-shaped protective plate, thereby protecting the soft tissue;

[0018] 2. When the swing saw is used to cut the ulna or the femur, the saw blade of the swing saw can penetrate the strip-shaped hole on the positioning strip, thereby limiting the saw blade of the swing saw through the strip-shaped hole to avoid the saw blade from shaking and ensure that the cutting surface is flat, which is beneficial to the butt joint of the two ends in the subsequent stage, and since the positioning strip is a detachable structure, the installation of the subsequent bone plate will not be affected;

[0019] 3. The sliding piece can slide on the connecting strip through the sliding groove and the sliding block, and the length of the cut bone can be directly observed through the scale marks on the scale strip and the sliding piece, thereby avoiding the problem of difficult control of the osteotomy length in the past;

[0020] 4. The Kirschner wire penetrates the four positioning holes to fix the proximal and distal ends of the bone, which not only ensures that the bone does not shake during the osteotomy stage, but also ensures that the two cut bone surfaces are stably butt jointed in the subsequent butt joint stage, and the position of the butt jointed section does not change through the engagement of the limiting male teeth and the limiting female teeth, thereby facilitating the subsequent installation of the steel plate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view structure schematic diagram of the present application;

[0022] Figure 2 It is a connecting strip and positioning sheet separation structure schematic diagram of the present application;

[0023] Figure 3 It is an A point enlarged structure schematic diagram of the present application; Figure 2

[0024] Figure 4 It is a bottom view structure schematic diagram of the present application;​

[0025] Figure 5 is a schematic view of a partial cross-section structure of the present application;

[0026] Figure 6 is a schematic view of a partial cross-section structure of the present application; Figure 5

[0027] Figure 7 is a schematic view of a partial cross-section structure of the present application;

[0028] Figure 8 is a schematic view of a partial cross-section structure of the present application; Figure 7

[0029] In the figure: 1, arc-shaped protective plate; 2, connecting strip; 3, support plate; 4, transmission plate; 5, torsion spring; 6, grip type actuating lever; 7, support sheet; 8, scale strip; 9, driven sheet; 10, sliding sheet; 11, limiting sheet; 12, positioning strip; 13, fixed sheet; 14, positioning sheet; 15, positioning block; 16, sliding block; 17, positioning groove; 18, sliding groove; 19, connecting plate; 20, positioning hole; 21, limiting male tooth; 22, limiting female tooth. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-8 The present application provides the following technical solutions:

[0032] ​​Embodiment one: in order to solve the problem that the previous ulna osteotomy guide plate cannot prevent saw blade from cutting muscle tissue and cannot guarantee that the saw blade cuts a flat plane, the following technical scheme is provided, specifically, a long tubular bone shortening osteotomy guide plate reset integrated device, comprising an arc-shaped protective plate 1 and a connecting strip 2 connected to one end of the arc-shaped protective plate 1, a sliding piece 10 and a positioning piece 14 are connected on the connecting strip 2 through a magnetic attraction structure, the sliding piece 10 and the positioning piece 14 are connected through a pulling mechanism, and a driven piece 9 and a fixed piece 13 are further connected on the pulling mechanism, the sliding piece 10 and the positioning piece 14 are respectively and correspondingly arranged with the driven piece 9 and the fixed piece 13, and the driven piece 9, the sliding piece 10, the positioning piece 14 and the fixed piece 13 are all provided with positioning holes 20 penetrating through both sides thereof, and the driven piece 9 and the sliding piece 10 and the positioning piece 14 and the fixed piece 13 are all clamped and fixedly connected with an arc-shaped positioning strip 12, and the positioning strip 12 is provided with a strip-shaped hole for the saw blade to penetrate, the side surface of the connecting strip 2 is engraved with a scale strip 8, and the sliding piece 10 is provided with a scale mark for comparison with the scale strip 8.

[0033] The magnetic attraction structure comprises a sliding block 16 arranged at the lower end of the sliding piece 10 and a positioning block 15 arranged at the lower end of the positioning piece 14, and the magnetic attraction structure further comprises a positioning groove 17 and a sliding groove 18 arranged on the surface of the connecting strip 2, and the positioning groove 17 is magnetically attracted and clamped and fixedly connected with the positioning block 15, and the sliding groove 18 is magnetically attracted and clamped and slidingly connected with the sliding block 16.

[0034] According to Figures 1-3 , the arc-shaped protective plate 1 penetrates the lower part of the ulna, temporarily separates the ulna and the muscle tissue of the operation site, and then magnetically attracts and clamps and fixes the positioning block 15 in the positioning groove 17;

[0035] During the process, the sliding block 16 is slidingly clamped and connected in the sliding groove 18;

[0036] By sliding the sliding block 16 in the sliding groove 18 and comparing the scale mark on the sliding piece 10 with the scale strip 8 on the side surface of the connecting strip 2, the distance moved by the sliding piece 10 can be directly observed;

[0037] The pulling mechanism comprises L-shaped support plates 3 arranged on the positioning sheet 14 and the fixing sheet 13, and the outer side of the upper end of each support plate 3 is connected with a transmission plate 4 through a convex bearing, the upper ends of the two transmission plates 4 are connected through an n-shaped grip type driving rod 6, the pulling mechanism further comprises support sheets 7 connected at the lower ends of the two transmission plates 4, the two support sheets 7 are respectively movably inserted into the inner side of the lower end of the corresponding transmission plate 4, and one end of each support sheet 7 is connected with a connecting plate 19 through a shaft, the driven sheet 9 and the sliding sheet 10 are respectively fixedly connected to the other end of the corresponding connecting plate 19, the transmission plate 4 is in a broken line shape, and the distance between the lower end of the transmission plate 4 and the rotation center thereof is less than the distance between the upper end of the transmission plate 4 and the rotation center thereof, the two ends of the grip type driving rod 6 are in a sheet structure, and the sheet structures at the two ends of the grip type driving rod 6 are respectively movably inserted into the inner side of the upper end of the corresponding transmission plate 4, and a torsion spring 5 for resetting the transmission plate 4 is further arranged between the transmission plate 4 and the convex on the outer side of the upper end of the corresponding support plate 3.

[0038] According to Figures 4-6 After the positioning block 15 and the sliding block 16 are respectively magnetically connected to the positioning groove 17 and the sliding groove 18, four Kirschner needles are respectively inserted through the four positioning holes 20, and the four Kirschner needles are driven into the interior of the ulna, at this time, the driven sheet 9, the sliding sheet 10, the fixing sheet 13 and the positioning sheet 14 are fixedly connected to the ulna;

[0039] Subsequently, the two positioning strips 12 are respectively clamped and fixed between the driven sheet 9 and the sliding sheet 10 and between the fixing sheet 13 and the positioning sheet 14;

[0040] Before cutting the ulna, the grip type driving rod 6 is held by hand to rotate the transmission plate 4, thereby driving the sliding block 16 to move in the sliding groove 18, so as to adjust the positions of the driven sheet 9 and the sliding sheet 10 (for controlling the length of the saw blade to cut the ulna), and in the process, the positions of the positioning strips 12 between the driven sheet 9 and the sliding sheet 10 are limited through the meshing of the limiting male teeth 21 and the limiting female teeth 22;

[0041] When cutting the ulna, the saw blade of the swing saw is inserted through the strip-shaped hole in the positioning strip 12, and then the ulna is cut, and through the limiting of the positioning strip 12 and the strip-shaped hole thereon, the shaking of the saw blade can be avoided, the stability of cutting is ensured, and the cutting surface is a flat plane, which is beneficial to the cutting;

[0042] After cutting is completed, the cut ulna is taken out by using tweezers, and then the grip type driving rod 6 is held by hand to rotate the transmission plate 4, thereby making the part of the ulna between the driven sheet 9 and the sliding sheet 10 close to the other part of the ulna, so as to gradually complete the butt joint;

[0043] After butt joint, the positioning strip 12 is removed, the steel plate is attached to the surface of the two parts of the ulna, and then the bone nail is used for fixation, so as to complete the shortening and cutting bone operation.

[0044] Embodiment two: to solve the problem that the two segments of ulna cannot be guaranteed to be stable in position when abutting in embodiment one, the following technical solution is provided, specifically, the pulling mechanism is provided with a limiting mechanism for limiting the driven plate 9 and the sliding plate 10.

[0045] The limiting mechanism comprises an L-shaped limiting plate 11 arranged outside each supporting plate 7, and the limiting plate 11 extends to the outside of the lower end of the corresponding transmission plate 4. The outside of the lower end of the transmission plate 4 and the inside of the corresponding limiting plate 11 are connected through limiting male teeth 21 and limiting female teeth 22. The limiting male teeth 21 and the limiting female teeth 22 are respectively distributed at equal intervals on the inside of the limiting plate 11 and the outside of the lower end of the transmission plate 4. The limiting plate 11 is made of elastic metal material, and the limiting male teeth 21 and the limiting female teeth 22 are both straight teeth, which are used to make the limiting plate 11 and the corresponding transmission plate 4 only move in one direction.

[0046] According to Figures 7-8 , when the sliding block 16 moves in the sliding groove 18, that is, when the sliding plate 10 moves, the supporting plate 7 gradually extends into the corresponding transmission plate 4, so that the supporting plate 7 moves outside the corresponding transmission plate 4;

[0047] During the process, the limiting male teeth 21 and the limiting female teeth 22 gradually engage in sequence, thereby limiting the position of the transmission plate 4 and the supporting plate 7, so that the position of the two segments of ulna does not change when abutting, thereby facilitating the installation of the subsequent steel plate.

[0048] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0049] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An integrated device for repositioning a shortened osteotomy guide plate for long tubular bones, comprising an arc-shaped protective plate (1) and a connecting strip (2) axially connected to one end thereof, characterized in that: The connecting strip (2) is connected to a sliding piece (10) and a positioning piece (14) by a magnetic attraction structure. The magnetic attraction structure includes a slider (16) located at the lower end of the sliding piece (10) and a positioning block (15) located at the lower end of the positioning piece (14). The sliding piece (10) and the positioning piece (14) are connected by a pulling mechanism, and the pulling mechanism is also connected to a driven piece (9) and a fixed piece (13). The sliding piece (10) and the positioning piece (14) are respectively connected to the driven piece (9) and the fixed piece (13). Correspondingly, the driven plate (9), sliding plate (10), positioning plate (14) and fixed plate (13) are all provided with positioning holes (20) that pass through both sides. The driven plate (9) and sliding plate (10) and the positioning plate (14) and fixed plate (13) are all connected by an arc-shaped positioning strip (12) that engages and fixes them. The positioning strip (12) is provided with a strip-shaped hole for the saw blade to pass through. The pulling mechanism is equipped with a limiting mechanism for limiting the driven plate (9) and sliding plate (10).

2. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 1, characterized in that: The side of the connecting strip (2) is engraved with a scale strip (8), and the sliding piece (10) is provided with scale marks that correspond to the scale strip (8).

3. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 2, characterized in that: The magnetic structure also includes a positioning groove (17) and a sliding groove (18) disposed on the surface of the connecting strip (2), wherein the positioning groove (17) is magnetically engaged and fixedly connected with the positioning block (15), and the sliding groove (18) is magnetically engaged and slidably connected with the slider (16).

4. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 3, characterized in that: The pulling mechanism includes L-shaped support plates (3) provided on both the positioning plate (14) and the fixing plate (13), and the upper outer side of each support plate (3) is connected to a transmission plate (4) by a protrusion bearing. The upper ends of the two transmission plates (4) are connected by an n-shaped grip lever (6).

5. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 4, characterized in that: The pulling mechanism also includes support plates (7) connected to the lower ends of the two transmission plates (4). The two support plates (7) extend into the interior of the lower end of the corresponding transmission plates (4), and each support plate (7) is axially connected to one end of a connecting plate (19). The driven plate (9) and the sliding plate (10) are respectively fixedly connected to the other end of the corresponding connecting plate (19).

6. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 5, characterized in that: The transmission plate (4) is in the shape of a broken line, and the distance between its lower end and its rotation center is less than the distance between its upper end and its rotation center.

7. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 6, characterized in that: The two ends of the grip-type lever (6) are plate-like structures, and the plate-like structures at both ends of the grip-type lever (6) extend into the inner side of the upper end of the corresponding transmission plate (4).

8. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 7, characterized in that: A torsion spring (5) for resetting the transmission plate (4) is also provided between the protrusion on the outer side of the upper end of the transmission plate (4) and the corresponding support plate (3).

9. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 8, characterized in that: The limiting mechanism includes an L-shaped limiting piece (11) provided on the outside of each support piece (7), and the limiting piece (11) extends to the lower outer side of the corresponding transmission plate (4). The lower outer side of the transmission plate (4) is connected to the inner side of the corresponding limiting piece (11) through a limiting sub-tooth (21) and a limiting female tooth (22).

10. The integrated device for repositioning a shortened osteotomy guide plate for long tubular bones according to claim 9, characterized in that: The limiting sub-tooth (21) and limiting female tooth (22) are equally spaced on the inner side of the limiting plate (11) and the outer side of the lower end of the transmission plate (4), respectively. The limiting plate (11) is made of elastic metal material. The limiting sub-tooth (21) and limiting female tooth (22) are both right-angle teeth, which are used to make the limiting plate (11) and the corresponding transmission plate (4) move closer to each other in only one direction.

Images