Folding fixation system for coracoclavicular ligament repair and method of use

Abstract

A folding fixation system for coracoclavicular ligament repair, characterized in that it includes a push rod 1, a folding cross fixator 2, a high-strength reconstruction fixation line 3 and a button fixation plate 4, wherein the push rod 1 is a hollow structure, the rear part of the folding cross fixator 2 is installed in the hollow push rod 1, the reconstruction fixation line 3 passes through the folding cross fixator 2, and passes through the push rod 1 to its tail end, the button fixation plate 4 is placed in the patient's bone tunnel 8, and the button fixation plate 4 fixes the reconstruction fixation line 3 at the clavicle end. The surgical operation can be performed minimally invasively percutaneously without exposing the acromioclavicular joint, and only an incision with a diameter of about 1.0 cm on the clavicle is required to complete all operations. The position of the folding cross fixator can be confirmed by the scale lines marked on the push rod, and there is no need to flip the implanted folding cross fixator, which not only reduces the operation time, but also reduces the pain of the patient.

Description

Technical Field

[0001] The patent of this invention belongs to the field of medical devices and relates to a coracoclavicular ligament repair folding fixation system for treating acromioclavicular joint dislocation and a method of use. Background Art

[0002] Acromioclavicular joint dislocation is a common shoulder injury in clinical practice, accounting for 9% of shoulder injuries. It is more common in young people, and the incidence rate in men is 5 times that in women. The injury mechanism of acromioclavicular joint dislocation is mainly that violent energy directly acts on the adducted shoulder joint, causing the acromion to shift inward and downward, resulting in varying degrees of tearing of the acromioclavicular joint capsule and the surrounding acromioclavicular ligament and coracoclavicular ligament, resulting in loss of acromioclavicular joint stability, leading to shoulder pain and limited shoulder joint movement, which seriously affects the daily activities of the injured. The commonly used clinical treatment method of clavicular hook plate fixation is rigid fixation, which fixes the acromioclavicular joint by hooking the acromion and pressing down the acromion end of the clavicle. Although the clavicular hook plate fixation is strong and reliable, the tip of the hook plate below the acromion can cause subacromial impingement, rotator cuff injury, and even acromion stress fracture, thereby causing limited shoulder joint function.

[0003] In view of the defects of rigid fixation, flexible fixation represented by Endobutton (double-loop micro-plate) and wire anchors has gradually occupied a dominant position in the treatment of acromioclavicular joint dislocation. In terms of treatment principle, it plays a role in replacing and reconstructing the coracoclavicular ligament, which to a certain extent meets the micro-motion requirements of the acromioclavicular joint in the vertical and horizontal directions, reduces shoulder pain, and improves patient satisfaction. However, flexible fixation treatment methods such as Endobutton (double-loop micro-plate fixation) and wire anchors are cumbersome to operate, and all require incision to expose the coracoid process, resulting in increased bleeding, prolonged operation time, increased iatrogenic injury and hospitalization time of patients, and are prone to internal fixation slippage, resulting in surgical failure. Summary of the invention

[0004] The technical problem to be solved by the present invention is that, in view of the current situation that the treatment of acromioclavicular joint dislocation requires open surgery, which causes great trauma and much bleeding, and the flexible fixation is complicated and cumbersome, and the internal fixation slippage failure is prone to occur, a folding fixation system and a method of use with a simple operation process and minimally invasive percutaneous reconstruction to repair coracoclavicular ligament injury are provided, so as to realize the flexible fixation of the acromioclavicular joint and achieve the purpose of minimally invasive treatment of acromioclavicular joint dislocation. The operation process is simple, the fixation is reliable, all surgical operations can be completed in a short time, the trauma is small, and the bleeding is small.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a folding fixation system for coracoclavicular ligament repair, which can reliably and flexibly fix the acromioclavicular joint. The folding fixation system for coracoclavicular ligament repair includes a push rod, a folding cross fixator, a button fixing plate and a high-strength reconstruction fixation line (made of polyethylene terephthalate material). The rear part of the folding cross fixator is installed in the hollow push rod. The reconstruction fixation line passes through the cable of the top plate of the folding cross fixator to connect with it, and passes through the push rod to its tail end; the button fixing plate is used for reconstruction fixation line or reconstruction ligament.

[0006] In addition, the present invention also proposes the following subsidiary technical solutions.

[0007] Preferably, the push rod is a hollow structure with scales marked on its surface; the rear portion of the folding cross fixer is installed on the top end of the push rod, and the reconstruction fixation line passes through the push rod and exits at the handle.

[0008] Preferably, the folding cross fixer is composed of a top plate, a folding fixing rod and a bottom plate.

[0009] Preferably, the top plate and the bottom plate are cylindrical structures, and four rotating shafts are symmetrically distributed around them and are respectively connected to four folding fixing rods.

[0010] Preferably, four slots are symmetrically distributed around the top plate, and their positions are opposite to the buckles of the upper bottom plate.

[0011] Preferably, the top plate comprises a fixing beam connected to a reconstruction fixing line or a reconstruction ligament via a fixing cable.

[0012] Preferably, the bottom plate is a hollow structure with four buckles symmetrically distributed around it, which are engaged with the slots of the top plate when the folding cross fastener is opened.

[0013] Preferably, the base plate is a hollow structure, through which the fixing straps and the reconstruction fixing wires pass.

[0014] Preferably, the folding fixing rod is composed of two single rods of equal length fixed by a rotating shaft, and in the open working state, the upper and lower ends of the four folding fixing rods are closed to each other and spread outward in a cross shape.

[0015] Preferably, there is a raised limiting block under the button fixing plate. When in operation, the button fixing plate is placed above the clavicle, and the limiting block is inserted into the channel, thereby limiting the displacement of the button fixing plate and preventing it from slipping.

[0016] Preferably, the button fixing plate has two side holes, and the two ends of the reconstruction fixing line or the reconstruction ligament pass through the two side holes respectively and are fixed.

[0017] Preferably, the surface of the push rod is provided with scale lines.

[0018] The present invention also provides a method for using the folding fixation system for coracoclavicular ligament repair, comprising the following steps:

[0019] Step 1: After reducing the acromioclavicular joint, use a guide needle to vertically insert into the middle of the coracoid process from above the clavicle; after confirming the position of the guide needle with a C-arm X-ray machine, use a cannulated drill to create a channel with a diameter of 5 mm;

[0020] Step 2: Use a push rod to insert the coracoclavicular ligament repair folding fixation system along the channel and make the folded cross fixator located below the coracoid process;

[0021] Step 3: Pull the reconstruction fixation line or the reconstruction ligament to move the top plate of the folding cross fixator upward and fit it with the bottom plate. At the same time, the four folding fixation rods are spread outward in a cross shape.

[0022] Step 4: Take out the push rod and pass the two ends of the reconstruction fixation line or the reconstruction ligament through the two side holes of the button fixation plate;

[0023] Step 5: Place the stopper of the button fixation plate into the channel above the clavicle, tighten the reconstruction fixation line or the reconstruction ligament and fix it to the button fixation plate, thereby flexibly fixing the acromioclavicular joint.

[0024] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0025] 1. Simple operation. The push rod connecting the folding cross fixator can easily pass through the bone tunnels of the clavicle and coracoid process. The traction reconstruction fixation line can firmly connect the top plate and the bottom plate of the folding cross fixator through the mutual engagement between the buckle and the slot to avoid looseness. At the same time, the four folding fixation rods are spread outward in a cross shape and can be firmly suspended on the bone tunnel from four directions, so that the folding fixation rods will not fall off and fail due to the patient's shoulder movement. At the same time, the limit block placed in the bone tunnel also limits the sliding of the button fixation plate, avoiding the occurrence of fixation failure.

[0026] 2. The surgical operation can be completed minimally invasively percutaneously without exposing the acromioclavicular joint. All operations can be completed through an incision with a diameter of about 1.0 cm on the clavicle. The position of the folding cross fixator can be confirmed by the scale lines marked on the push rod. There is no need to flip the implanted folding cross fixator, which not only reduces the operation time but also reduces the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1. Schematic diagram of the coracoclavicular ligament repair folding fixation system of the present invention: a. Schematic diagram of the assembly of the coracoclavicular ligament repair folding fixation system; b. The coracoclavicular ligament repair folding fixation system in a fixed state;

[0028] Figure 2 . Schematic diagram of the structure of the coracoclavicular ligament repair folding fixation system-push rod of the present invention: a lateral structural diagram of the push rod; b Schematic diagram of the structure of the push rod from a top view;

[0029] Figure 3 . Schematic diagram of the structure of the folding cross fixator of the coracoclavicular ligament repair folding fixation system of the present invention: a lateral structural diagram of the folding cross fixator; b schematic diagram of the connection between the folding cross fixator, the fixing strap and the reconstruction fixing line;

[0030] Figure 4 . Schematic diagram of the folding cross fixer-bottom plate structure of the present invention: a. top view; b. side view (1); c. side view (2);

[0031] Figure 5 . Schematic diagram of the folding cross fixer-top plate structure of the present invention: a. Schematic diagram of the assembly of the top plate and the fixing strap; b. Schematic diagram of the top view; c. Side view (1); d. Side view (2);

[0032] Figure 6 . Schematic diagram of the folding cross fixer-folding fixing rod structure of the present invention: a. Side view; b. folding state; c. front view;

[0033] Figure 7 . Schematic diagram of the structure of the button fixing plate of the present invention: a. a three-dimensional schematic diagram; b. a side structural schematic diagram; c. a top structural schematic diagram; d. a bottom structural schematic diagram;

[0034] Figure 8 . Schematic diagram of closed reduction of the acromioclavicular joint and the bony channel in this embodiment;

[0035] Fig. 9 . Schematic diagram of the push rod and the folding cross fixator placed into the bone tunnel in this embodiment;

[0036] Fig.10 . A schematic diagram of the folding cross fixer in a fixed state in this embodiment;

[0037] Fig.11 . Schematic diagram of the button fixation plate passing through the reconstruction fixation line or reconstruction ligament in this embodiment;

[0038] Fig.12 . The effect of the coracoclavicular ligament repair folding fixation system after the acromioclavicular joint fixation is completed in this embodiment;

[0039] in,

[0040] 1. Push rod; 11. Guide post; 12. Handle; 13. Notch;

[0041] 2. Folding cross holder;

[0042] 21. Bottom plate - folding cross fixer; 211. first rotating shaft; 212. buckle; 213. hollow;

[0043] 22. Top plate-folding cross fixer; 221. Second rotating shaft; 222. Card slot; 223. Fixed crossbeam;

[0044] 23. Folding fixing rod-folding cross fixer; 231. Third rotating shaft; 232. Single rod;

[0045] 24. Fixing straps;

[0046] 3. Reconstruct the fixation line (or reconstruct the ligament);

[0047] 4. button fixing plate; 41. side hole; 42. limit block;

[0048] 5. Clavicle; 6. Coracoid process; 7. Guide needle; 8. Bone tunnel. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described in detail below in conjunction with preferred embodiments and the accompanying drawings.

[0050] The present invention aims to provide a folding fixation system for coracoclavicular ligament repair, such as Figure 1 , 2 As shown, the push rod (1), a folding cross fixer (2), a high-strength reconstruction fixing wire (3) and a button fixing plate (4) are formed. The push rod (1) includes a guide post (11) and a handle (12). The guide post (11) is a hollow stainless steel cylinder, and four symmetrically distributed rectangular notches (13) are arranged at the far end thereof, which face the first rotating shaft (211) of the bottom plate (21) when the folding cross fixer (2) is assembled.

[0051] like Figure 3 , 4 As shown in FIGS. 5 and 6 , the folding cross fixer (2) comprises a bottom plate (21), a top plate (22), a folding fixing rod (23) and a fixing strap (24).

[0052] like Figure 4 As shown, the bottom plate (21) is a hollow short cylindrical structure, and four first rotating shafts (211) are symmetrically distributed around it and are respectively connected to four folding fixing rods (23). The bottom plate (21) includes four buckles (212) that are symmetrically distributed and extend downward.

[0053] like Figure 5 As shown, the top plate (22) is a short cylindrical structure, and four second rotating shafts (221) are symmetrically distributed around it and are respectively connected to four folding fixing rods (23); the top plate (22) includes four symmetrically distributed card slots (222), and their positions are corresponding to the buckles (212) on the top; in addition, a fixed crossbeam (223) is provided in the middle of the top plate (22), which is connected to the fixed cable strap (24).

[0054] like Figure 6 As shown, each folding fixing rod (23) is composed of two single rods (232) connected by a third rotating shaft (231); Figure 3 As shown, in the assembled state, the four folding fixing rods (23) are straight rod-shaped, and their upper and lower ends are respectively connected to the first rotating shaft (211) of the bottom plate (21) and the second rotating shaft (221) of the top plate (22). Figure 1 As shown in b and 10, when in the fixed state, the upper and lower ends of the four folding fixing rods (23) are close to each other and spread outward in a cross shape.

[0055] like Figure 1 As shown, in the assembled state, the reconstruction fixing line (3) passes through the fixing strap (24) of the top plate (22) and goes upward through the bottom plate (21) and the guide post (11) of the push rod (1) to the handle (12).

[0056] like Figure 8 , 9 As shown, during the operation, a hollow drill bit with a diameter of 5.0 mm is used to drill a straight bone channel (8) from the upper part of the clavicle (5) to the middle part of the coracoid process (6), thereby providing sufficient space for the insertion of the folding cross fixator (2) and the push rod (1).

[0057] like Figure 1 , 10 As shown, after placing the folding cross fixator (2) under the coracoid process (6) using the push rod (1), the surgeon holds the handle (12) with one hand to fix the push rod (1), and pulls the reconstruction fixation line (3) passing through the fixation strap (24) with the other hand, so that the top plate (22) moves upward. Since the transverse diameter of the slot (222) and the transverse diameter of the buckle (212) are both 1 mm, it is ensured that the two can be smoothly engaged with each other, so that the bottom plate (21) and the top plate (22) are firmly fixed and will not loosen or fall off. At the same time, the symmetrical four folding fixation rods (23) are spread outward in a "cross" shape, and the distance between the two ends is 20 mm, which can ensure that they are firmly fixed under the coracoid process (6) and will not slip out of the bone channel (8).

[0058] like Fig.11 , 12As shown, the reconstructed fixation line (3) or the reconstructed ligament is fixed to the clavicle end through the side hole (41) of the button fixation plate (4). In the fixed state, the limiting block (42) below the button fixation plate (4) is placed in the bone channel (8), which limits the displacement of the button fixation plate (4) and can ensure that it is firmly fixed above the clavicle (5) to prevent slippage.

[0059] It should be pointed out that the above preferred embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A folding fixation system for coracoclavicular ligament repair, characterized in that: The invention comprises a push rod (1), a folding cross fixator (2), a high-strength reconstruction fixation line (3) and a button fixation plate (4), wherein the push rod (1) is a hollow structure, the rear portion of the folding cross fixator (2) is installed in the hollow push rod (1), the reconstruction fixation line (3) passes through the folding cross fixator (2) and the push rod (1) to the rear end thereof and out, the button fixation plate (4) is placed in the bone tunnel (8) of the patient, and the button fixation plate (4) fixes the reconstruction fixation line (3) at the clavicle end; The folding cross fixer (2) comprises a top plate (22), a folding fixing rod (23) and a bottom plate (21); the top plate (22) and the bottom plate (21) are cylindrical structures, and four first rotating shafts (211) and second rotating shafts (221) are symmetrically distributed around the four sides thereof, and are respectively connected to the four folding fixing rods (23); the bottom plate (21) comprises four symmetrically distributed buckles (212) extending downward; the top plate (22) comprises four symmetrically distributed buckle slots (222), the positions of which are corresponding to the buckles (212) at the top; in addition, a fixed crossbeam (223) is provided in the middle of the top plate (22), which is connected to a fixed cable (24); the fixed cable (24) passes through a high-strength reconstruction fixing line (3) and is connected thereto; The bottom plate (21) is a hollow cylindrical structure, and four buckles (212) are symmetrically distributed around it. When the folding cross fixer (2) is opened, it is interlocked with the slots (222) of the top plate (22); the folding fixing rod (23) is composed of two single rods (232) of equal length fixed by a third rotating shaft (231), and is a straight structure in the assembled state. In the open and fixed state, the upper and lower ends are closed together, and the four folding fixing rods (23) are spread outward in a cross shape.

2. The folding fixation system for coracoclavicular ligament repair according to claim 1, characterized in that: The push rod (1) comprises a guide column (11) and a handle (12); the guide column (11) is a hollow structure, and the far end of the guide column (11) is provided with four symmetrically distributed rectangular notches (13).

3. The folding fixation system for coracoclavicular ligament repair according to claim 1, characterized in that: The reconstruction fixing line (3) passes through the fixing strap (24) at the top of the folding cross fixer (2) to be connected thereto, and passes through the guide post (11) of the push rod (1) to the handle (12) end of the push rod (1) and out.

4. The folding fixation system for coracoclavicular ligament repair according to claim 1, characterized in that: The button fixing plate (4) comprises side holes (41) at both ends, and is placed on the upper edge of the clavicle (5) when fixing the reconstruction fixation line (3) or the reconstruction ligament. The reconstruction fixation line (3) or the reconstruction ligament passes through the side holes (41) at both ends of the button fixing plate (4) for fixation.

5. The folding fixation system for coracoclavicular ligament repair according to claim 4, characterized in that: A raised stop block (42) is provided below the button fixing plate (4), and the stop block (42) is inserted into the bone channel (8) during fixing.

6. The folding fixation system for coracoclavicular ligament repair according to claim 1, characterized in that: The method of using the system includes the following steps: Step 1: After reducing the acromioclavicular joint, use the guide needle (7) to vertically penetrate the middle of the coracoid process (6) from above the clavicle (5). After the C-arm X-ray machine confirms that it is located in the middle of the clavicle and coracoid process, use a hollow drill to create a bone tunnel (8) with a diameter of 5 mm. Step 2: Use the push rod (1) to insert the coracoclavicular ligament repair folding fixation system along the channel and make the folding cross fixator (2) under the coracoid process (6); Step 3: Pull the reconstruction fixation line (3) so that the bottom plate (21) of the folding cross fixator (2) moves upward and fits with the top plate (22) to form an integrated structure, while the four folding fixation rods (23) unfold outward in a cross shape; Step 4: After the push rod (1) is taken out, the two ends of the reconstruction fixing wire (3) are respectively passed through the two end side holes (41) of the button fixing plate (4); Step 5: Place the stopper (42) of the button fixing plate (4) into the bone tunnel (8), pull up the reconstruction fixation line (3) and fix it on the button fixing plate (4), so as to perform a firm and flexible fixation of the acromioclavicular joint.

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