Multi-angle positioning osteotomy device

Abstract

The invention relates to the technical field of osteotomy instruments, in particular to a multi-angle positioning osteotomy device which comprises an arc-shaped datum plate, a through groove is formed in the datum plate, a guider is arranged on the datum plate, and a kirschner wire can be drilled into a backbone from different angles through the guider; a noninvasive fixing structure is arranged in the datum plate, and the datum plate can be attached to the surface of a backbone through the noninvasive fixing structure. The non-invasive fixing structure comprises a suction nozzle, a fixing cylinder, a piston, a threaded rod and a rotary knob. The plurality of suction nozzles are embedded in the concave surface of the datum plate, the fixed cylinder is vertically mounted on the datum plate, and the interior of the fixed cylinder is communicated with the suction nozzles; the piston is arranged in the fixed cylinder in a sealed and sliding mode. The top of the piston is connected with the bottom of the threaded rod; the top of the threaded rod penetrates through the fixed barrel to be fixedly connected with the rotary knob. According to the osteotomy device, the Kirschner wire can be drilled into a backbone through different angles under the condition that the requirement of minimally invasive osteotomy is met, and backbone osteotomy is achieved; and meanwhile, the device can be fixed on the surface of a backbone under a non-invasive condition, so that the osteotomy operation of medical personnel is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of osteotomy instruments, and more particularly, to a multi-angle positioning osteotome. Background Art

[0002] In orthopedic osteotomy surgeries, an osteotomy guide is a key instrument for achieving precise cutting of the bone surface. Traditional osteotomy guides mostly adopt a parallel positioning osteotome similar to the one disclosed in the utility model patent CN222676362U, which uses a design with parallel positioning holes. By guiding Kirschner wires parallelly into the bone shaft through the parallel positioning holes, the osteotomy plane is determined. However, due to the relatively thick bone shaft, in actual operation, the osteotomy guide needs to be moved along the bone shaft surface, and Kirschner wires need to be inserted from different directions so as to make the osteotomy plane flat. Since the osteotome usually has three parallel guiding holes, in order to drill as many holes as possible in the bone shaft, medical staff need to move the osteotome along the bone surface for drilling. When using the above-mentioned parallel positioning osteotome, at least two medical staff are required to perform minimally invasive osteotomy on the bone shaft, that is, one medical staff holds the osteotome by hand, and the other medical staff drills the Kirschner wire. The operation is rather cumbersome. During the operation, when the osteotome needs to be moved, it is very easy for the positioning holes of the Kirschner wire to deviate from the predetermined plane.

[0003] To solve the above problems, through retrieval, it is found that a minimally invasive osteotome disclosed in a Chinese patent (CN222676362U) has an arc-shaped guide plate, and the osteotomy holes are distributed in a fan shape on the arc-shaped guide plate. At the same time, positioning bumps are provided on both sides of the guide plate, and positioning holes penetrating through the positioning bumps are provided in the positioning bumps. When using this osteotome, the positioning needle is drilled into the bone shaft through the positioning hole to fix it. Then the Kirschner wire is drilled through the osteotomy hole. Although this osteotome realizes multi-angle drilling operations on the bone shaft, the center of the arc surface of its guide plate is located at the bone shaft, which will result in a still relatively large incision for the osteotomy surgery and is difficult to meet the requirements of minimally invasive osteotomy. Secondly, since the positioning holes are located on both sides of the guide plate, the fixing position of the positioning needle is not on the osteotomy plane, which will cause additional bone damage. Therefore, in view of this problem, the applicant has invented a multi-angle positioning osteotome that meets the requirements of minimally invasive osteotomy. Summary of the Invention

[0004] The purpose of the present application is to provide a multi-angle positioning osteotome, which can drill Kirschner wires into the bone shaft at different angles to achieve bone shaft osteotomy while meeting the requirements of minimally invasive osteotomy; at the same time, it can be fixed on the bone shaft surface under non-invasive conditions, facilitating the osteotomy operation of medical staff.

[0005] The present application is implemented as follows. A multi-angle positioning osteotome includes an arc-shaped reference plate. A through groove is formed in the reference plate, and a guide is provided on the reference plate, and the guide can allow Kirschner wires to be drilled into the bone shaft from different angles;

[0006] The reference plate is provided with a non-invasive fixation structure, which can attach the reference plate to the surface of the bone shaft.

[0007] Furthermore, the non-invasive fixation structure includes multiple suction nozzles, a fixed cylinder, a piston, a threaded rod, and a knob; the multiple suction nozzles are embedded in the concave surface of the reference plate, the fixed cylinder is vertically installed on the reference plate, and the interior of the fixed cylinder is communicated with the multiple suction nozzles; the piston is hermetically and slidably arranged in the fixed cylinder; the top of the piston is rotatably connected to the bottom of the threaded rod; the top of the threaded rod passes through the fixed cylinder and is fixedly connected to the knob, and the fixed cylinder is threadedly connected to the threaded rod.

[0008] Furthermore, the guide includes a first osteotomy sleeve and two support plates; the bottoms of the two support plates are fixedly connected to the top surface of the reference plate, and the two support plates are distributed on both sides of the through groove; the first osteotomy sleeve is installed between the two support plates, and the first osteotomy sleeve is rotatably connected to the support plates; the first osteotomy sleeve is a telescopic sleeve.

[0009] Furthermore, sliding grooves I are formed on both side walls of the through groove, and the telescopic end of the first osteotomy sleeve is slidably connected to the sliding groove I.

[0010] Furthermore, the guide is a fan-shaped flat plate, multiple positioning holes are formed in the osteotomy guide plate in a radially distributed manner, the converging ends of the multiple positioning holes are located at one end of the osteotomy guide plate away from the fitting plate, the guide is fixedly connected to the reference plate, and the multiple positioning holes are located directly above the through groove.

[0011] Furthermore, the guide is a second osteotomy sleeve, and sliding grooves II are formed on both side walls of the through groove; the outer wall of the second osteotomy sleeve is slidably connected to the sliding groove II so that it can move along the sliding groove II.

[0012] Furthermore, the reference plate includes two fixing blocks and two fitting plates, the two fitting plates are connected to the two fixing blocks and are located on both sides of the fixing blocks; the fitting plates are soft plates.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. A through groove is formed in the fitting plate, and a guide is arranged above the through groove, so that a Kirschner wire can pass through the through groove under the guidance of the guide at different angles to drill holes in the bone shaft, thereby achieving the effect of minimally invasive osteotomy without moving the osteotome; in addition, a non-invasive fixation structure is arranged on the reference plate, which can not only fix the entire osteotome, but also avoid additional bone damage;

[0015] 2. Fix two support plates on the top surface of the reference plate. A first osteotomy sleeve is rotatably arranged between the two support plates. In this way, by rotating the first osteotomy sleeve, the Kirschner wire can be drilled into the bone shaft from different angles to achieve minimally invasive osteotomy. And with the above design, medical staff can adjust the drilling angle and the number of drill holes of the Kirschner wire according to the actual situation to make the osteotomy plane smoother. In addition, the first osteotomy sleeve is set as a telescopic sleeve, so that the first osteotomy sleeve can be attached to the bone surface and form a fixed drilling channel at any rotation angle.

[0016] 3. The outer wall of the first osteotomy sleeve is slidably clamped in the first chute through a convex block. When adjusting the angle of the first osteotomy sleeve, its length can be automatically adjusted, so that the end of the first osteotomy sleeve can always be attached to the bone surface to form a fixed drilling channel.

[0017] 4. Set the osteotomy guide plate as a fan-shaped flat plate, and a plurality of positioning holes distributed radially are arranged inside. The converging ends of the plurality of positioning holes are located at one end of the osteotomy guide plate away from the fitting plate. This design can not only drill the Kirschner wire into the bone shaft at multiple angles to make holes, but also has a simple structure.

[0018] 5. The outer wall of the second osteotomy sleeve is slidably arranged in the second chute. In this way, the second osteotomy sleeve can not only rotate around the bone shaft to drill the Kirschner wire into the bone shaft from different angles, but also keep the second osteotomy sleeve always attached to the surface of the bone shaft, so as to realize the osteotomy operation.

[0019] 6. Fix two soft fitting plates on both sides of the fixed block, so that the concave surface of the fitting plate can be attached to the surface of the bone shaft. At the same time, soft suction nozzles are embedded on the concave surface of the fitting plate, and a plurality of suction nozzles are simultaneously communicated with the inside of the fixed cylinder. After the medical staff attaches the fitting plate to the surface of the bone shaft, just rotate the knob, and negative pressure can be generated inside all the suction nozzles at the same time, so that the whole device is fixed on the surface of the bone shaft. This not only has a simple operation, but also can avoid causing additional damage to the bone shaft. Description of the Drawings

[0020] Figure 1 is the front view of a multi-angle positioning osteotome provided in Embodiment 1 of the present application;

[0021] Figure 2 is the top view of a multi-angle positioning osteotome provided in Embodiment 1 of the present application;

[0022] Figure 3 is the cross-sectional view of a multi-angle positioning osteotome provided in Embodiment 1 of the present application in the plane of the first osteotomy sleeve;

[0023] Figure 4 is the cross-sectional view of a multi-angle positioning osteotome provided in Embodiment 1 of the present application in the plane of the non-invasive fixation structure;

[0024] Figure 5 is Figure 4 an enlarged view of part A in

[0025] Figure 6 a plan sectional view of a multi - angle positioning osteotome provided in Embodiment 2 of the present application, located at osteotomy sleeve 1;

[0026] Figure 7 a plan sectional view of a multi - angle positioning osteotome provided in Embodiment 3 of the present application, located at the osteotomy guide plate;

[0027] Figure 8 a plan sectional view of a multi - angle positioning osteotome provided in Embodiment 3 of the present application, located at the non - invasive fixation structure;

[0028] Figure 9 a top view of a multi - angle positioning osteotome provided in Embodiment 3 of the present application;

[0029] Figure 10 a front view of a multi - angle positioning osteotome provided in Embodiment 4 of the present application;

[0030] Figure 11 a plan sectional view of a multi - angle positioning osteotome provided in Embodiment 4 of the present application, located at osteotomy sleeve 2;

[0031] Figure 12 a plan sectional view of a multi - angle positioning osteotome provided in Embodiment 4 of the present application, located at the non - invasive fixation structure;

[0032] Figure 13 a top view of a multi - angle positioning osteotome provided in Embodiment 4 of the present application.

[0033] The reference numerals involved in the above - mentioned drawings are as follows:

[0034] 1, fitting plate; 2, fixing block; 3, suction nozzle; 4, osteotomy sleeve 1; 5, support plate; 6, knob; 7, fixed cylinder; 8, through - slot; 9, chute 2; 10, sealing cavity; 11, negative pressure channel; 12, piston; 13, threaded rod; 14, osteotomy sleeve 2; 15, chute 1; 16, osteotomy guide plate; 17, positioning hole. Detailed implementation manners

[0035] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] The implementation of the present application will be described in detail below with reference to specific embodiments.

[0037] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if terms such as "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Referring to Figure 1-13 as shown, it is a preferred embodiment provided by the present application.

[0039] Embodiment 1: A multi-angle positioning osteotome, as Figure 1 shown, includes an arc-shaped reference plate, and a through groove 8 is opened on the reference plate. Combining Figure 2 as shown, the reference plate is mainly composed of two fixing blocks 2 and two fitting plates 1. The fitting plate 1 is made of relatively thick soft silicone, and the fitting plate 1 can be bent and fitted according to the patient's bone shaft. The fixing block 2 is made of stainless steel, and a guide is installed on the fixing block 2, and the guide can allow the Kirschner wire to drill into the bone shaft from different angles.

[0040] In this embodiment, the guide is mainly composed of two vertical support plates 5 and an osteotomy sleeve 4; as Figure 2 and Figure 3 shown, the bottom parts of the two support plates 5 are respectively fixedly installed on the two fixing blocks 2, the osteotomy sleeve 4 is installed between the two fixing blocks 2, the outer side wall of the osteotomy sleeve 4 is rotatably connected to the support plate 5, and the osteotomy sleeve 4 is located directly above the through groove 8. When the osteotomy sleeve 4 rotates a certain angle, the Kirschner wire can pass through the osteotomy sleeve 4 and the through groove 8 to drill into the bone shaft.

[0041] In this embodiment, the osteotomy sleeve 4 is set as a telescopic sleeve. When the osteotomy sleeve 4 rotates to a certain angle, the medical staff stretches the osteotomy sleeve 4 so that its telescopic end contacts the bone surface, so that the osteotomy sleeve 4 can be fitted to the bone surface at any rotation angle to form a fixed drilling channel.

[0042] This embodiment also provides a non-invasive fixing structure, which uses the principle of negative pressure to enable the fitting plate 1 to fit on the bone surface. As Figure 4 and Figure 5As shown in the figure, the non-invasive fixation structure is composed of multiple suction nozzles 3, a fixed cylinder 7, a piston 12, a threaded rod 13, and a knob 6. The multiple suction nozzles 3 are embedded in the concave surface of the fitting plate 1. Two negative pressure channels 11 are opened on the fitting plate 1 and the fixed block 2, and the negative pressure channels 11 connect the suction nozzles 3 on one side in series. The fixed cylinder 7 is vertically installed on the fixed block 2, the bottom of which is an opening and communicates with the sealing cavity 10 of the fixed block 2, and the two negative pressure channels 11 communicate with the sealing cavity 10 of the fixed block 2 at the same time. The piston 12 is hermetically and slidably arranged in the fixed cylinder 7; the top of the piston 12 is rotatably connected to the bottom of the threaded rod 13; the top of the threaded rod 13 passes through the fixed cylinder 7 and is fixedly connected to the knob 6, and is connected by a threaded method, which can form self-locking and enable a stable negative pressure attraction to be formed inside the suction nozzle 3. When the fitting plate 1 is attached to the bone surface, only by rotating the knob 6 to move the piston 12 upward, negative pressure can be generated inside the suction nozzle 3, so that the suction nozzle 3 can be tightly attached to the bone shaft. Fixing the osteotome by means of negative pressure attraction can avoid additional bone damage.

[0043] Working principle: When using this osteotome, first attach the concave surface of the fitting plate 1 to the bone surface so that the suction nozzle 3 adsorbs on the bone surface, and then rotate the knob 6 to form a stable negative pressure inside the suction nozzle 3, thereby realizing the fixation of the osteotome. Then the medical staff rotates the first osteotomy sleeve 4 to different positions and adjusts the length of the first osteotomy sleeve 4 so that the end of the first osteotomy sleeve 4 contacts the bone surface, then insert a Kirschner wire into the first osteotomy sleeve 4, and then use an electric drill to drill the Kirschner wire into the bone shaft to make a hole. By rotating the first osteotomy sleeve 4 to different angular positions and repeating the above hole-making operation, the bone shaft can be drilled at different angles to realize minimally invasive osteotomy operation.

[0044] Embodiment 2: A multi-angle positioning osteotome, as Figure 6 shown, in this embodiment, a first sliding groove 15 is opened on the side of the through groove 8 in Embodiment 1, and a sliding convex block (not marked in the figure) is provided on the side wall of the telescopic section of the first osteotomy sleeve 4. The sliding convex block is in the first sliding groove 15 and is slidably connected to the first sliding groove 15. In this way, when the first osteotomy sleeve 4 is rotated, under the limiting action of the first sliding groove 15, the length of the first osteotomy sleeve 4 will be automatically adjusted, and its end can always be in contact with the surface of the bone shaft. This embodiment is more convenient to operate than Embodiment 1.

[0045] Embodiment 3: A multi-angle positioning osteotome, as Figures 7-9As shown, the difference between this embodiment and the above embodiment lies in the different structures of the guide. The guide in this embodiment is a flat plate similar to a fan shape. A plurality of radially distributed positioning holes 17 are opened in the osteotomy guide plate 16. In this embodiment, the bottom of the osteotomy guide plate 16 is fixedly installed in the through groove 8. The converging ends of the plurality of positioning holes 17 are located at the top of the osteotomy guide plate 16, so that small-incision osteotomy can be achieved. The structure of the osteotome in this embodiment is simple. It only needs to insert the Kirschner wire into different positioning holes 17 in sequence and drill it into the bone through an electric drill.

[0046] Embodiment 4: A multi-angle positioning osteotome, as Figures 10-13 shown. The main difference between this embodiment and the above embodiment lies in the different structures of the guide. In this embodiment, the guide is the osteotomy sleeve two 14. Slide grooves two 9 are opened on both sides of the through groove 8. A convex block (not marked in the figure) is provided on the outer side wall of the osteotomy sleeve two 14. The convex block is located in the slide groove two 9. The osteotomy sleeve two 14 can move along the slide groove two 9, so as to realize drilling holes by inserting the Kirschner wire from different positions and different angles on the surface of the bone shaft.

[0047] It should be emphasized that as long as the guide in this application can make the Kirschner wire drill holes in the bone shaft from different angles, such a guide structure is within the protection scope of this application.

[0048] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A multi-angle positioning osteotome, characterized in that: The invention comprises an arc-shaped reference plate, the reference plate is provided with a through groove (8), and a guide is arranged on the reference plate, and the guide can allow the Kirschner wire to be drilled into the bone shaft from different angles; A non-invasive fixing structure is arranged inside the reference plate, and the non-invasive fixing structure can fit the reference plate onto the surface of the bone shaft.

2. A multi-angle positioning osteotome according to claim 1, characterized in that: The non-invasive fixing structure comprises a plurality of suction nozzles (3), a fixed cylinder (7), a piston (12), a threaded rod (13) and a knob (6); the plurality of suction nozzles (3) are embedded in the concave surface of a reference plate, the fixed cylinder (7) is vertically mounted on the reference plate, and the interior of the fixed cylinder (7) is communicated with the plurality of suction nozzles (3); the piston (12) is sealingly and slidably arranged in the fixed cylinder (7); the top of the piston (12) is rotatably connected to the bottom of the threaded rod (13); the top of the threaded rod (13) passes through the fixed cylinder (7) and is fixedly connected to the knob (6), and the fixed cylinder (7) is threadedly connected to the threaded rod (13).

3. A multi-angle positioning osteotome according to claim 1 or 2, characterized in that: The guide comprises an osteotomy sleeve (4) and two support plates (5); the bottoms of the two support plates (5) are fixedly connected to the top surface of the reference plate, and the two support plates (5) are distributed on both sides of the through groove (8); the osteotomy sleeve (4) is installed between the two support plates (5), and the osteotomy sleeve (4) is rotatably connected to the support plates (5); the osteotomy sleeve (4) is a telescopic sleeve.

4. The multi-angle positioning osteotome according to claim 3, characterized in that: The two side walls of the through groove (8) are provided with a slide groove (15), and the telescopic end of the osteotomy sleeve (4) is slidably connected to the slide groove (15).

5. A multi-angle positioning osteotome according to claim 1 or 2, characterized in that: The guide is a fan-shaped flat plate. A plurality of radially distributed positioning holes (17) are provided in the osteotomy guide plate (16). The guide is fixedly connected to the base plate. The plurality of positioning holes (17) are located directly above the through slot (8).

6. A multi-angle positioning osteotome according to claim 1 or 2, characterized in that: The guide is an osteotomy sleeve 2 (14), and two side walls of the through groove (8) are provided with slide grooves 2 (9); the outer side wall of the osteotomy sleeve 2 (14) is slidably connected with the slide groove 2 (9), so that the osteotomy sleeve 2 (14) can move along the slide groove 2 (9).

7. The multi-angle positioning osteotome according to claim 1, characterized in that: The reference plate comprises two fixed blocks (2) and two bonding plates (1); the two bonding plates (1) are connected to the two fixed blocks (2) and are located on both sides of the fixed blocks (2); the bonding plates (1) are soft plates.

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