Olecranon osteotomizer

Abstract

A ulna olecranon osteotomy device comprises a base body connected with a bone structure; a first guide plate, one end of which is pivotally connected to the base body, and a first osteotomy groove is arranged on the first guide plate; a second guide plate, one end of which is rotatably connected to the end of the first guide plate away from the base body, and a second osteotomy groove is arranged on the second guide plate; and an angle adjusting device, the center of which is provided with a positioning hole, and the positioning hole is pivotally connected with the adjacent two ends of the first guide plate and the second guide plate respectively, so that the angle between the first guide plate and the second guide plate can be adjusted. In application, the direction of osteotomy can be accurately controlled by using a kirschner wire, and the two sides are used in turns, so that a V-shaped structure can be cut out on the ulna olecranon, the damage of the olecranon cartilage surface and the distal humeral articular surface is avoided, and the fracture healing after osteotomy is beneficial.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an olecranon osteotomy device for the ulna. Background Technology

[0002] Currently, complex cases of comminuted intercondylar and supracondylar fractures of the humerus are common in clinical practice, and the surgery is complicated, often requiring olecranon osteotomy of the ulna. There are currently two methods for olecranon osteotomy of the ulna: thin chisel and electric saw. Both have their disadvantages. It is difficult to control the osteotomy direction with a thin chisel, and in addition to the inability to control the direction with an electric saw, it is also easy to lose bone volume. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an olecranon osteotomy device for the ulna.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An olecranon osteotomy device for the ulna, comprising

[0006] The matrix connects to the bone structure;

[0007] A first guide plate, one end of which is pivotally connected to the base, and a first osteotomy groove is provided on the first guide plate;

[0008] A second guide plate, one end of which is rotatably connected to the end of the first guide plate away from the substrate, and a second osteotomy groove is provided on the second guide plate; and

[0009] An angle adjustment device has a positioning hole at its center, which is pivotally connected to the adjacent ends of the first guide plate and the second guide plate, respectively, so that the angle between the first guide plate and the second guide plate can be adjusted.

[0010] Furthermore, the angle adjustment device includes a disc with a positioning hole at its center, the positioning hole extending through both sides of the disc.

[0011] Furthermore, one end of the first guide plate extends to a first connecting plate, and the first connecting plate is provided with a first rotating hole; one end of the second guide plate extends to a second connecting plate, and the first connecting plate is provided with a second rotating hole.

[0012] Furthermore, a cavity is formed inside the disk, and a rotating shaft is installed at the center of the cavity, with the positioning hole located on the rotating shaft.

[0013] Furthermore, the first connecting plate is pivotally connected to the rotating shaft via a first rotating hole; the second connecting plate is pivotally connected to the rotating shaft via a second rotating hole.

[0014] Furthermore, the upward-facing side of the disk is provided with angular graduations evenly distributed around the circumference of the positioning hole.

[0015] Furthermore, the first guide plate has a plurality of first guide holes equidistantly distributed along the first osteotomy groove, and the plurality of first guide holes are equidistantly connected to the first osteotomy groove; the second guide plate has a plurality of second guide holes equidistantly distributed along the second osteotomy groove, and the plurality of second guide holes are equidistantly connected to the second osteotomy groove.

[0016] Furthermore, the positioning hole, the first guide hole, and the second guide hole have the same diameter.

[0017] Furthermore, the base includes a main rod, one end of which extends radially and is connected to a placement rod, the placement rod having an upward-opening groove along its axial direction.

[0018] Furthermore, a handrail extends radially from the end of the main rod away from the placement rod.

[0019] The beneficial effects of this utility model are:

[0020] 1. The olecranon osteotomy device proposed in this utility model can precisely control the osteotomy direction through Kirschner wires. Its use on both sides in stages can cut a V-shaped structure in the olecranon, avoiding damage to the olecranon cartilage surface and the distal articular surface of the humerus, which is conducive to fracture healing after osteotomy.

[0021] 2. The olecranon osteotomy device proposed in this utility model is rotatably connected to the base through a first guide plate, thereby making the position of the first guide plate relative to the base adjustable.

[0022] 3. The olecranon osteotomy device proposed in this utility model, by setting an angle adjustment device, is set between the first guide plate and the second guide plate, thereby realizing the adjustment of the angle between the first guide plate and the second guide plate. The first guide plate and the second guide plate can rotate in the cavity, thereby making the positional stability of the first guide plate and the second guide plate better.

[0023] 4. The olecranon osteotomy device proposed in this utility model uses a cutter to perform osteotomy in the first and second osteotomy grooves, forming a first osteotomy surface and a second osteotomy surface with a preset angle. The first osteotomy surface and the second osteotomy surface form a V-shaped angle, which avoids damage to the olecranon cartilage surface and the distal articular surface of the humerus, and is conducive to fracture healing after osteotomy.

[0024] 5. The olecranon osteotomy device proposed in this utility model protects the distal articular surface of the humerus, mainly the trochlear articular surface, from damage during osteotomy by setting the groove. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an olecranon osteotomy device of the present invention;

[0027] Figure 2 This is a schematic diagram of the first guide plate of an olecranon osteotomy device of the present invention;

[0028] Figure 3 This is a schematic diagram of the second guide plate of an olecranon osteotomy device according to the present invention;

[0029] Figure 4 This is a schematic diagram of the angle adjustment device of the olecranon osteotomy tool of this utility model.

[0030] In the figure, 10 is the base; 101 is the placement rod; 102 is the handrail; 103 is the groove; 20 is the first guide plate; 201 is the first osteotomy groove; 202 is the first guide hole; 203 is the first connecting plate; 204 is the rotating hole; 205 is the adjusting gap; 206 is the locking hole; 30 is the second guide plate; 301 is the second osteotomy groove; 302 is the second guide hole; 303 is the second connecting plate; 40 is the disc; 401 is the positioning hole; 402 is the rotating shaft; 403 is the angle scale; 2031 is the first rotating hole; 3031 is the second rotating hole. Detailed Implementation

[0031] The following is combined Figure 1-4 This utility model will be described in detail.

[0032] An olecranon osteotomy device for the ulna, such as Figure 1 As shown, it includes a base 10 connected to the bone structure; a first guide plate 20, one end of which is pivotally connected to the base 10, and a first osteotomy groove 201 is provided on the first guide plate 20; a second guide plate 30, one end of which is rotatably connected to the end of the first guide plate 20 away from the base 10, and a second osteotomy groove 301 is provided on the second guide plate 30; and an angle adjustment device, which is pivotally connected to the adjacent ends of the first guide plate 20 and the second guide plate 30 respectively, and the angle adjustment device can adjust the angle between the first guide plate 20 and the second guide plate 30.

[0033] In this embodiment, as Figure 2 and Figure 3As shown, a first connecting plate 203 extends from one end of the first guide plate 20, and a first rotating hole 2031 is provided on the first connecting plate 203; a second connecting plate 303 extends from one end of the second guide plate 30, and a second rotating hole 3031 is provided on the first connecting plate 203.

[0034] Specifically, a rotating plate extends from the end of the first guide plate 20 away from the first connecting plate 203. The rotating plate has a rotating hole 204. The first guide plate 20 is pivotally connected to the base 10 through the rotating hole 204. An adjustment gap 205 passes through the rotating plate along the length of the first guide plate 20. The adjustment gap 205 is connected to the rotating hole 204. Locking holes 206 are provided on opposite sides of the rotating plate and are perpendicular to the adjustment gap 205. The two locking holes 206 are coaxial and connected to the adjustment gap 205. Bolts or other fasteners are adapted to the internal threads of the locking holes 206. By rotating the fasteners, the size of the adjustment gap 205 is controlled, thereby adjusting the size of the rotating hole 204 to fix the height position of the first guide plate 20 and the base 10. Several annular grooves (not shown in the figure) are evenly distributed along the axial direction on the outer surface of the base 10 to adapt to the rotating holes 204. The first guide plate 20 is pivotally connected to different annular grooves to adjust the corresponding height.

[0035] In this embodiment, a cavity is formed inside the disk 40, and a rotating shaft 402 is installed at the center of the cavity. A positioning hole 401 is provided on the rotating shaft 402. Further, the first connecting plate 203 is pivotally connected to the rotating shaft 402 through a first rotating hole 2031; the second connecting plate 303 is pivotally connected to the rotating shaft 402 through a second rotating hole 3031.

[0036] In this embodiment, the upward-facing side of the disk 40 is provided with angular scales 403 evenly distributed around the positioning hole 401. The scale surface of the disk 40 is set to a white background with black scale lines inlaid.

[0037] In this embodiment, as Figure 2 and Figure 3 As shown, the first guide plate 20 has a plurality of first guide holes 202 equidistantly distributed along the first osteotomy groove 201, and the plurality of first guide holes 202 are equidistantly connected to the first osteotomy groove 201; the second guide plate 30 has a plurality of second guide holes 302 equidistantly distributed along the second osteotomy groove 301, and the second guide holes 302 of the first transmission component are equidistantly connected to the second osteotomy groove 301.

[0038] The guide plate is designed to be rectangular, with a osteotomy groove for the osteotomy saw blade to pass through and a guide hole for placing Kirschner wires on the upper surface of the guide plate.

[0039] The first guide plate 20 and the second guide plate 30 are each provided with a plurality of guide holes at intervals. Preferably, the number of first guide holes 202 is 4 and the number of second guide holes 302 is 5. In other embodiments, the number can be set according to surgical needs. When cutting the first osteotomy surface, the Kirschner wire can be selectively inserted into one of the plurality of first guide holes 202; when cutting the second osteotomy surface, the Kirschner wire can be selectively inserted into one of the plurality of second guide holes 302.

[0040] In this embodiment, the base 10 includes a main rod, one end of which extends radially to a connecting rod 101. The rod 101 has an upward-opening groove 103 along its axial direction to protect the distal articular surface of the humerus, mainly the trochlear articular surface, from damage during osteotomy. Furthermore, a handrail 102 extends radially from the end of the main rod away from the rod 101.

[0041] A first connecting plate 203 and a second connecting plate 303 are respectively provided on the end faces of the first guide plate 20 and the second guide plate 30, and a first rotating hole 2031 and a second rotating hole 3031 are respectively provided through the edges of the first connecting plate 203 and the second connecting plate 303.

[0042] This design allows for precise control of the osteotomy direction, and its use on both sides in stages allows for the creation of a V-shaped structure in the olecranon of the ulna, avoiding damage to the olecranon cartilage surface and the distal articular surface of the humerus, which is beneficial for fracture healing after osteotomy.

[0043] The olecranon osteotomy device for the ulna provided by this utility model is used as follows:

[0044] First, a reference surface is cut on the humerus. The first guide plate 20 is fixed on the reference surface by passing Kirschner wires through the first guide hole 202. The bone is cut in the first osteotomy groove 201 by a cutting tool to form the first osteotomy surface.

[0045] When it is necessary to fix the second guide plate 30 by adjusting its angle, the doctor first rotates the second guide plate 30 according to the operating steps described above. The second guide plate 30 rotates on the rotating shaft 402 through the second rotating hole 3031. At the same time, the rotating shaft 402 rotates the first pointer through the connecting shaft. At this time, the second guide plate 30 and the first pointer rotate synchronously. By observing the angle between the first osteotomy groove 201 and the second osteotomy groove 301, and reading the angle between the rotated second guide plate 30 and the fixed first guide plate 20 through the corresponding degree label, the angle between the second guide plate 30 and the first guide plate 20 can be easily read, which facilitates the doctor's subsequent angle adjustment.

[0046] Specifically, the second guide plate 30 can be finely adjusted. The rotating shaft 402 rotates the second guide plate 30 through the second connecting plate 303. The angle between the first guide plate 20 and the second guide plate 30 rotates around the axis of the disk 40 until the state of the first guide plate 20 and the second guide plate 30 after rotation is adapted to the surgical angle required by the doctor. Then, the knob adjustment wheel is stopped. The second guide plate 30 is fixed on the reference surface by passing a Kirschner wire through the second guide hole 302. The osteotomy is performed in the second osteotomy groove 301 by the cutter to form the second osteotomy surface. The first osteotomy surface and the second osteotomy surface form a V-shaped angle, which effectively improves the convenience of subsequent surgery.

[0047] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A ulnar olecranon osteotomylng instrument, characterized in that include The matrix connects to the bone structure; A first guide plate, one end of which is pivotally connected to the base, and a first osteotomy groove is provided on the first guide plate; A second guide plate, one end of which is rotatably connected to the end of the first guide plate away from the base, and a second osteotomy groove is provided on the second guide plate; as well as An angle adjustment device has a positioning hole at its center, which is pivotally connected to the adjacent ends of the first guide plate and the second guide plate, respectively, so that the angle between the first guide plate and the second guide plate can be adjusted.

2. The ulnar olecranon osteotomylng instrument of claim 1, wherein, The angle adjustment device includes a disc with a positioning hole at its center, which extends through both sides of the disc.

3. The ulnar osteotomy instrument of Claim 2, wherein, One end of the first guide plate extends to a first connecting plate, and the first connecting plate is provided with a first rotating hole; one end of the second guide plate extends to a second connecting plate, and the first connecting plate is provided with a second rotating hole.

4. The olecranon osteotomy device for ulna as described in claim 3, characterized in that, The disk has a cavity, and a rotating shaft is installed at the center of the cavity. The positioning hole is located on the rotating shaft.

5. The olecranon osteotomy device for ulna as described in claim 4, characterized in that, The first connecting plate is pivotally connected to the rotating shaft through a first rotating hole; the second connecting plate is pivotally connected to the rotating shaft through a second rotating hole.

6. The olecranon osteotomy device for ulna as described in claim 4, characterized in that, The upward-facing side of the disk is provided with angular graduations evenly distributed around the positioning hole in a circumferential direction.

7. The olecranon osteotomy device for ulna as described in claim 1, characterized in that, The first guide plate has a plurality of first guide holes equidistantly distributed along the first osteotomy groove, and the plurality of first guide holes are equidistantly connected to the first osteotomy groove; the second guide plate has a plurality of second guide holes equidistantly distributed along the second osteotomy groove, and the plurality of second guide holes are equidistantly connected to the second osteotomy groove.

8. The olecranon osteotomy device for ulna as described in claim 7, characterized in that, The positioning hole, the first guide hole, and the second guide hole have the same diameter.

9. The olecranon osteotomy device for ulna as described in claim 1, characterized in that, The base includes a main rod, one end of which extends radially and is connected to a placement rod. The placement rod has an upward-opening groove along its axial direction.

10. The olecranon osteotomy device for ulna as described in claim 9, characterized in that, The main rod has a handrail extending radially from the end furthest from the placement rod.

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