Far-end clavicle reduction assembly

Abstract

The utility model relates to a medical instrument, in particular to a far-end clavicle reduction assembly which comprises an inner row of anchor nails, an outer row of anchor nails, a guider and an insertion bolt rod. The inner-row anchor comprises a first through hole, a first positioning matching piece and a line belt; the through holes are formed in the positions, close to the front ends, of the inner-row anchors, the first positioning matching pieces are arranged at the rear ends of the inner-row anchors, and the wire belts are connected to the inner-row anchors. The outer row of ground anchors are connected with the inner row of ground anchors through wire belts; the guider comprises a second positioning matching piece and a positioning sleeve; the second positioning matching piece is arranged at the front end of the guider; the positioning sleeve is connected to the rear end of the guider; the bolt rod is inserted into the positioning sleeve, and the front end of the bolt rod is inserted into the first through hole. Compared with the prior art, the problems that in the prior art, rigid fixation of the distal clavicle fracture easily causes acromion and clavicle fracture, and acromioclavicular joint pain and even dislocation are easily caused after a steel plate is taken out are solved, and elastic triangular fixation of the distal clavicle fracture and acromioclavicular joint dislocation is achieved through cooperation of all the structures in the assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of medical instruments, specifically to a clavicle distal end reset assembly. BACKGROUND

[0002] Clavicle is an important bone connecting sternum and scapula, which plays an important role in the stability and function of shoulder. Clavicle distal fracture refers to the fracture of the end of clavicle, i.e. the end far from the body midline. Symptoms of clavicle distal fracture can include severe pain, swelling, ecchymosis, limited shoulder movement, etc., which often need surgical treatment. Surgical treatment generally uses steel plate and screw fixation, i.e. a metal steel plate is fixed at the fracture site through surgery, and screw is used to fix the fractured fragments together.

[0003] Currently, the surgical treatment scheme for clavicle distal fracture and acromioclavicular joint dislocation mainly includes clavicle distal hook steel plate, loop steel plate and huitu artificial ligament fixation, which are all single-direction stress fixation (coracoclavicular ligament reconstruction or acromioclavicular joint steel plate fixation). Although these treatment schemes have been clinically verified for many years, their disadvantages cannot be avoided and have been reported in many documents.

[0004] Hook steel plate: its advantage lies in stable fixation effect and can be applied to almost all types of clavicle distal fracture and acromioclavicular joint dislocation. However, its disadvantages are also obvious: in addition to large surgical incision and easy damage to clavicular nerve, shoulder impact sign may occur, acromion cutting, steel plate unhooking, proximal stress fracture of steel plate, possible re-dislocation of acromioclavicular joint after internal fixation removal, and screw affecting healing of clavicle distal fracture may occur.

[0005] Loop steel plate and artificial ligament reconstruction are surgical methods under the concept of minimally invasive treatment, and the essence of both methods is to reconstruct coracoclavicular ligament. Their advantage lies in small trauma and restoring the relative position of clavicle from the perspective of anatomy, but they also have similar disadvantages: risk of fracture of clavicle and coracoid process and early rehabilitation internal fixation failure.

[0006] Therefore, a new type of clavicle distal reset structure or instrument with more stable fixation and fewer side effects is needed. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims to solve at least one of the above problems and provides a clavicle distal reset assembly to solve the problem that rigid fixation of clavicle distal fracture in the prior art can easily lead to acromion and clavicle fracture, and acromioclavicular joint pain and even dislocation after removal of steel plate. The present scheme realizes elastic triangular fixation of clavicle distal fracture and acromioclavicular joint dislocation through cooperation of structures in the assembly.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions.

[0009] A clavicle distal end reduction assembly comprises an inner row anchor, an outer row anchor, a guide and a plug-in rod;

[0010] The inner row anchor comprises a first through hole, a first positioning fitting and a wire belt; the first through hole is arranged at a position close to the front end of the inner row anchor; the first positioning fitting is arranged at the rear end of the inner row anchor; and the wire belt is connected to the inner row anchor.

[0011] The outer row anchor is connected to the inner row anchor through the wire belt.

[0012] The guide comprises a second positioning fitting and a positioning sleeve; the second positioning fitting is arranged at the front end of the guide and is used for matching the first positioning fitting of the inner row anchor; and the positioning sleeve is connected to the rear end of the guide and is used for the plug-in rod.

[0013] The plug-in rod is inserted into the positioning sleeve, and the front end of the plug-in rod is inserted into the first through hole to form a cross locking.

[0014] The inner row anchor, the outer row anchor and the plug-in rod form a triangular fixation.

[0015] Preferably, the wire belt is provided with at least one pair.

[0016] Preferably, the wire belt is symmetrically arranged with respect to the axis of the inner row anchor.

[0017] Preferably, the first through hole and the first positioning fitting are arranged in parallel, so that after the guide and the inner row anchor are matched and connected, the positioning sleeve is parallel to the first through hole.

[0018] Preferably, the height difference between the first through hole and the first positioning fitting is equal to the height difference between the second positioning fitting and the positioning sleeve, so that after the guide and the inner row anchor are matched and connected, the positioning sleeve and the first through hole are located on the same axis.

[0019] Preferably, the first positioning fitting is a positioning groove, and the second positioning fitting is a positioning block.

[0020] Preferably, the outer row anchor is provided with a second through hole for passing through the wire belt.

[0021] Preferably, the inner row anchor, the outer row anchor and the plug-in rod are provided with a developing mark.

[0022] Preferably, the rear end of the plug-in rod is provided with a fixing thread.

[0023] Preferably, the outer row anchor is an extruded nail with a threaded outer surface, a diameter of 3.0-3.5mm, and a length of 16-18mm; the insertion rod is a medical magnesium alloy.

[0024] Preferably, the outer row anchor has a diameter of 3.5mm, and the first through hole has a diameter of 2.0-2.5mm; the insertion rod has a diameter of 2.0-2.5mm.

[0025] Preferably, the inner row anchor has a diameter of 5.5mm and a length of 16-18mm. Compared with the prior art, the utility model has the following beneficial effects:

[0026] In the current distal clavicle reduction methods, all are single direction stress fixation (coracoclavicular ligament reconstruction or acromioclavicular joint plate fixation).

[0027] The inner row anchor, the outer row anchor, and the insertion rod form a triangular fixation system, which is more stable, and the flexible wire between the inner row anchor and the outer row anchor and the magnesium alloy used by the insertion rod have better elasticity, so that the fixation of the assembly is more in line with biomechanics.

[0028] In addition, in the assembly, the magnesium alloy is used in the material upper part, which is closer to the elastic modulus of the bone and has superior osteogenesis, self-degradation, and other characteristics, so that secondary surgery for removal is not needed, the pain and the cost of secondary surgery and recovery of the patient can be reduced, and the assembly has good application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Fig. 1 is a structural schematic view of an inner row anchor;

[0030] Figure 2 Fig. 2 is a structural schematic view of an outer row anchor;

[0031] Figure 3 Fig. 3 is a structural schematic view of a guide;

[0032] Figure 4 Fig. 4 is a structural schematic view of an insertion rod;

[0033] Figure 5 Fig. 5 is a structural schematic view of an assembly in use;

[0034] In the drawings: 1-inner row anchor; 11-first through hole; 12-first positioning fitting; 13-wire; 2-outer row anchor; 21-second through hole; 3-guide; 31-second positioning fitting; 32-positioning sleeve; 4-insertion rod; 41-fixed thread; 100-clavicle; 200-beak; 300-shoulder peak. DETAILED DESCRIPTION

[0035] The utility model will be described in detail below in combination with the drawings and specific embodiments.

[0036] Example

[0037] A distal clavicle reduction assembly, such as Figures 1-5 As shown, it includes inner row of anchors 1, outer row of anchors 2, guide 3 and plug rod 4;

[0038] The inner row of anchors 1 includes a first through hole 11, a first positioning fitting 12, and a cable 13; the first through hole is opened at the front end of the inner row of anchors 1, the first positioning fitting 12 is disposed at the rear end of the inner row of anchors 1, and the cable 13 is connected to the inner row of anchors 1.

[0039] The outer row of anchor bolts 2 is connected to the inner row of anchor bolts 1 via a cable 13;

[0040] The guide 3 includes a second positioning fitting 31 and a positioning sleeve 32; the second positioning fitting 31 is disposed at the front end of the guide 3 and is used to cooperate with the first positioning fitting 12 of the inner row of anchor nails 1; the positioning sleeve 32 is connected to the rear end of the guide 3 and is used to pass the bolt rod 4.

[0041] The bolt rod 4 is inserted into the positioning sleeve 32, and the front end of the bolt rod 4 is inserted into the first through hole 11 to form a cross lock;

[0042] The inner row of anchors 1, the outer row of anchors 2, and the bolt rod 4 form a triangular fixing.

[0043] More specifically, in this embodiment:

[0044] like Figure 1 As shown, this is the inner row of anchor bolts 1. Near the front end of the inner row of anchor bolts 1 ( Figure 1 The lower middle section has a first through hole 11, and the rear end (on the head) of the inner row of anchors 1 has a first positioning fitting 12 (a positioning groove). Additionally, a pair of wire strips 13 are connected to the inner row of anchors 1 in an axially symmetrical manner. The outer surface of the inner row of anchors 1 is threaded, with a diameter selectable of 5.5 mm and a length selectable of 16-18 mm; the specific dimensions should be determined according to the bone size of different patients. Furthermore, the inner row of anchors 1 is provided with a contrast marker, which facilitates confirmation of its position via fluoroscopic imaging during surgery.

[0045] like Figure 2 As shown, this is the outer row of anchor bolts 2, which are compression bolts. At the front end of the outer row of anchor bolts 2 ( Figure 2A second through hole 21 is provided at the lower middle end. This second through hole 21 is used to pass through the suture 13 of the inner row of anchors 1 to connect the inner row of anchors 1 and the outer row of anchors 2. The outer row of anchors 2, which are compression pins, has threads on its outer surface. The diameter can be selected as 3.0-3.5 mm, and the length is preferably 14-16 mm. The specific dimensions should be determined according to the bone size of different patients. In addition, a contrast marker is provided on the outer row of anchors 2 to facilitate confirmation of its position by fluoroscopic imaging during surgery.

[0046] like Figure 3 As shown, this is the guide 3. Its front end has a second positioning fitting 31 (a positioning block) for engaging with the first positioning fitting 12 (positioning groove) of the inner row of anchors 1 (such as a plug-in or interlocking connection, or a detachable connection). Its rear end is connected to a positioning sleeve 32 for passing through the insert rod 4. The main body of the guide 3 is a bent pipe or bent plate, allowing the second positioning fitting 31 at the front end to engage with the first positioning fitting 12 at the rear end of the inner row of anchors 1, while also ensuring that the positioning sleeve 32 at the rear end corresponds to the first through hole 11 at the front end of the inner row of anchors 1. Specifically, the first through hole 11 is arranged parallel to the first positioning fitting 12, so that after the guide 3 is connected with the inner row of anchors 1, the positioning sleeve 32 is parallel to the first through hole 11; at the same time, the height difference between the first through hole 11 and the first positioning fitting 12 is equal to the height difference between the second positioning fitting 31 and the positioning sleeve 32, so that after the guide 3 is connected with the inner row of anchors 1, the positioning sleeve 32 and the first through hole 11 are located on the same axis; thus, the bolt rod 4 can be inserted into the first through hole 11 through the positioning sleeve 32.

[0047] like Figure 4 As shown, this is the insertion rod 4. Its front end, after passing through the positioning sleeve 32, is inserted into the first through hole 11 of the inner row of anchors 1. Its rear end is provided with a fixing thread 41, approximately 0.5-1 cm long, allowing it to be fixed to the acromion 300. The insertion rod 4 is made of medical-grade magnesium alloy, which has an elastic modulus closer to bone and excellent properties such as superior osteogenicity and biodegradability. Furthermore, the insertion rod 4 is equipped with a contrast marker, allowing for easy confirmation of its position via fluoroscopic imaging during surgery.

[0048] like Figure 5 As shown, when the distal repositioning assembly of the clavicle 100 in this embodiment is used:

[0049] First, locate the coracoclavicular ligament in the clavicle 100 region and fix the inner row anchor 1 to the clavicle 100. Adjust and control the direction of the first positioning fitting 12 towards the posterolateral edge of the acromion 300. Pass the two sutures 13 through the anterior and posterior edges of the clavicle 100 to the underside of the clavicle 100. Connect the inner row anchor 1 and the outer row anchor 2 through the second through hole 21 of the outer row anchor 2 via the sutures 13. After locating the coracoid process 200, fix the outer row anchor 2 to the coracoid process 200. Tighten the sutures 13, reset the distal position of the clavicle 100, and squeeze and fix the outer row anchor 2 to fully tighten the sutures 13 and fix the inner row anchor 1.

[0050] Subsequently, the second positioning fitting 31 at the front end of the guide 3 is connected to the first positioning fitting 12 of the inner row of anchors 1. At the same time, the positioning sleeve 32 at the end is adjusted to a suitable needle insertion point on the outer side of the acromion 300. After drilling the bone with an electric drill, the insertion rod 4 is inserted into the positioning sleeve 32 and inserted into the first through hole 11 passing through the inner row of anchors 1. The insertion rod 4 is locked onto the acromion 300 by the fixing thread 41 at the tail end.

[0051] By observing the development marks set by fluoroscopic development, it can be confirmed that the front end (far end) of the bolt rod 4 has completely passed through the first through hole 11 opened on the body of the inner row of anchor nails 1.

[0052] Thus, the outer row of anchors 2, the inner row of anchors 1, and the insert rod 4 form a triangular fixing structure, with reliable connection and fixation. Furthermore, the outer row of anchors 2 and the inner row of anchors 1 are connected by a cable 13, and the insert rod 4 is made of elastic medical-grade magnesium alloy, giving the triangular structure a certain degree of flexibility, making it more biomechanically sound, and reducing discomfort to the patient.

[0053] Current surgical techniques for reconstructing the coracoclavicular ligament using loop plates are known to have internal fixation failures and complications such as fractures due to excessive stress at the coracoid process 200. This structure significantly reduces stress at the coracoid process 200 and clavicle 100 through the insertion of the bolus 4, and is made of elastic medical-grade magnesium alloy, giving the triangular structure elastic fixation characteristics that conform to biomechanical principles. Furthermore, the magnesium alloy is biodegradable within the body, avoiding the need for secondary surgery for removal.

[0054] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A clavicular distal repositioning assembly, characterized in that, It comprises inner row anchor (1), outer row anchor (2), guide (3) and plug rod (4); The inner row anchor (1) comprises a first through hole (11), a first positioning fitting (12) and a wire band (13); the first through hole (11) is arranged on the inner row anchor (1) near the front end, the first positioning fitting (12) is arranged on the rear end of the inner row anchor (1), and the wire band (13) is connected to the inner row anchor (1); The outer row anchor (2) is connected with the inner row anchor (1) through the wire band (13); The guide (3) comprises a second positioning fitting (31) and a positioning sleeve (32); the second positioning fitting (31) is arranged on the front end of the guide (3) and is used for matching the first positioning fitting (12) of the inner row anchor (1); and the positioning sleeve (32) is connected to the rear end of the guide (3) and is used for being inserted by the plug rod (4); The plug rod (4) is inserted into the positioning sleeve (32), and the front end of the plug rod (4) is inserted into the first through hole (11), so that the cross locking is formed. The inner row anchor (1), the outer row anchor (2) and the plug rod (4) form a triangular fixing.

2. A clavicular distal set reduction assembly according to claim 1, wherein, The wire band (13) is provided with at least one pair.

3. A clavicular distal set reduction assembly according to claim 2, wherein, The wire band (13) is symmetrically arranged on the axis of the inner row anchor (1).

4. A clavicular distal set reduction assembly according to claim 1, wherein, The first through hole (11) and the first positioning fitting (12) are arranged in parallel, so that, after the guide (3) is matched and connected with the inner row anchor (1), the positioning sleeve (32) is parallel to the first through hole (11).

5. A clavicular distal set reduction assembly according to claim 4, wherein, The height difference between the first through hole (11) and the first positioning fitting (12) is equal to the height difference between the second positioning fitting (31) and the positioning sleeve (32), so that, after the guide (3) is matched and connected with the inner row anchor (1), the positioning sleeve (32) is located on the same axis as the first through hole (11).

6. A clavicular distal set component according to claim 1, wherein, The first positioning fitting (12) is a positioning groove, and the second positioning fitting (31) is a positioning block.

7. A clavicular distal set component according to claim 1, wherein, The outer row anchor (2) is provided with a second through hole (21) for penetrating the wire band (13).

8. A clavicular distal set reduction assembly according to claim 1, wherein, The inner row anchor (1), the outer row anchor (2) and the plug rod (4) are provided with a developing mark.

9. A clavicular distal set component according to claim 1, wherein, The rear end of the plug rod (4) is provided with a fixing thread (41).

10. A clavicular distal set component according to claim 1, wherein, The outer row anchor (2) is an extrusion nail, the outer surface of which is provided with a thread, the diameter of which is 3.0-3.5mm, and the length of which is 16-18mm; and the plug rod (4) is a medical magnesium alloy.

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