External fixing device for treating metacarpal neck fracture

Abstract

The utility model provides an external fixing device for treating metacarpal neck fracture, which comprises a fixing rod, and adjusting rods are inserted into two ends of the fixing rod. The needle tails of the kirschner wires are of upward bending structures, so that the kirschner wires are connected with the fixing frame, a fracture part can be more firmly fixed, stable support is provided, a kirschner wire fixing mode and an external fixing frame fixing mode can be combined, the advantages of the kirschner wire fixing mode and the external fixing frame fixing mode are integrated, corresponding defects of the kirschner wire fixing mode and the external fixing frame fixing mode are avoided, and the kirschner wire fixing mode is more convenient to use. Early movement of joints can be allowed while firmer fixation is provided, the treatment time is shortened, the treatment effect is improved, a soft cushion layer is formed at the joint of the kirschner wire and the fixing frame through the rubber sleeve, direct contact between the kirschner wire and the fixing frame is reduced, and therefore discomfort of a patient is relieved; and the rubber sleeve can absorb external impact and vibration to a certain extent, so that the influence of the external impact and vibration on the fracture part is reduced, and the rehabilitation of the patient is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedics, and in particular relates to an external fixation device for treating metacarpal neck fractures. Background Art

[0002] Metacarpal neck fractures are common hand injuries, and surgical treatment options include retrograde crossed Kirschner wire fixation, antegrade Kirschner wire fixation, plate and screw fixation, and micro external fixator fixation. However, each of these fixation methods has its shortcomings: Kirschner wire fixation alone lacks stability and requires supplemental fixation with plaster or a brace; plate and screw fixation offers greater stability but requires open reduction, which can damage the fracture ends and blood flow to the joint capsule; and micro external fixators require cross-joint fixation, which can affect the patient's early mobility. A method that maximizes the advantages of each fixation method while mitigating their shortcomings could provide better treatment outcomes.

[0003] In the K-wire external fixation device, published with publication number CN215192121U, a fixing frame, fixing block, and clamping portion are integrated into each guide frame to form at least two independent fixing units. Each fixing unit has at least two K-wire mounting positions, effectively securing multiple K-wires through the use of multiple fixing units. A single fixing unit can be mounted on at least two K-wires, regardless of the K-wire insertion angle. Due to the setting of the upper and lower fixing frames, the two fixing blocks fixed on the same Kirschner wire restrict each other's rotation, thereby realizing locking of the fixing blocks, maintaining the bone position, and preventing the fracture from being displaced again after reduction. Each Kirschner wire is fixed by setting a clamping part of a petal-shaped structure, and the clamping flap can be squeezed, opened and clamped in reverse to achieve fixation of Kirschner wires of different diameters. It is not limited by the thickness of the Kirschner wire, has a wide range of practical applications, and has high promotion value. However, the above-mentioned Kirschner wire external fixation device uses three groups of Kirschner wires to fix the fracture site, and the fixing force is weak. Therefore, it is necessary to provide a new external fixation device for treating metacarpal neck fractures to solve the above-mentioned technical problems. Utility Model Content

[0004] The utility model aims to provide an external fixation device for treating metacarpal neck fractures.

[0005] In order to solve the above technical problems, the utility model provides an external fixation device for treating metacarpal neck fractures, including a fixing rod, an adjusting rod is inserted at both ends of the fixing rod, and the ends of the two groups of adjusting rods away from each other are connected to a fixing sleeve, and the sides of the two groups of fixing sleeves away from each other are respectively fixedly connected to a first connecting rod and a second connecting rod, and the lower surfaces of the first connecting rod and the second connecting rod are respectively connected to a first fixing mechanism and a second fixing mechanism through a connecting plate.

[0006] Preferably, the ends of the two groups of adjusting rods that are close to each other are fixedly connected to a fixing plate, and the surfaces of the two groups of fixing plates are respectively provided with threads, and the directions of the two groups of threads are opposite. Slots are provided at both ends of the fixing rods, and the inner walls of the slots are provided with thread grooves that match the threads, so that the two groups of fixing plates can be driven to move by rotating the adjusting rods.

[0007] Preferably, the ends of the two groups of adjusting rods that are away from each other are fixedly connected to the limit plate, and the sides of the two groups of fixing sleeves that are close to each other are provided with grooves that cooperate with the adjusting rods and the limit plate, which can maintain the stability of the movement of the fixing sleeves.

[0008] Preferably, the first fixing mechanism includes a first fixing frame, the upper surface of the first fixing frame is fixedly connected to the connecting plate, and the lower end of the first fixing frame is provided with a first Kirschner wire, a second Kirschner wire, a third Kirschner wire and a fourth Kirschner wire, the first Kirschner wire and the second Kirschner wire are arranged in an X-shaped cross structure, the third Kirschner wire is arranged at the upper end of the first Kirschner wire and the second Kirschner wire, and the fourth Kirschner wire is arranged at the lower end of the first Kirschner wire and the second Kirschner wire, which can fix multiple positions of the joint.

[0009] Preferably, the needle tails of the first Kirschner wire, the second Kirschner wire, the third Kirschner wire and the fourth Kirschner wire are all configured to be upwardly bent structures, and the first fixing frame is provided with a first slot corresponding to the needle tails of the first Kirschner wire, the second Kirschner wire, the third Kirschner wire and the fourth Kirschner wire, and the inner wall of the first slot is fixedly connected to the first rubber sleeve, and the first rubber sleeve is configured to be a double-layer structure in the upper and lower positions, which can maintain the connection effect of the first Kirschner wire, the second Kirschner wire, the third Kirschner wire and the fourth Kirschner wire with the first fixing frame.

[0010] Preferably, the second fixing mechanism includes a second fixing frame, the upper surface of the second fixing frame is fixedly connected to the connecting plate, and the lower end of the second fixing frame is provided with a fifth Kirschner wire, a sixth Kirschner wire and a seventh Kirschner wire in a front-to-back position in sequence, which can fix the proximal bone.

[0011] Preferably, the needle tails of the fifth Kirschner wire, the sixth Kirschner wire and the seventh Kirschner wire are all configured to be upwardly bent structures, and the second fixing frame is provided with a second slot corresponding to the needle tails of the fifth Kirschner wire, the sixth Kirschner wire and the seventh Kirschner wire, and the inner wall of the second slot is fixedly connected to a second rubber sleeve, and the second rubber sleeve is configured to be a double-layer structure in the upper and lower positions, which can maintain the connection effect of the fifth Kirschner wire, the sixth Kirschner wire and the seventh Kirschner wire with the second fixing frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model is provided with a fixing plate, so that the fixing rod can be held by hand to maintain stability, and then the adjustment rod can be rotated to drive the first connecting rod and the second connecting rod to move closer or farther away from each other. The distance between the first fixing mechanism and the second fixing mechanism can be adjusted according to the patient's fracture position, which can better adapt to the anatomical structure and fracture conditions of different individuals, provide personalized treatment, ensure that the fracture site is stably supported, and promote fracture healing. The adjustment method is simple and flexible, which helps medical staff to make corresponding changes at any time according to the progress of treatment and improve the rehabilitation effect.

[0014] 2. The utility model sets the tail of the Kirschner wire as an upward curved structure, so that the Kirschner wire is connected to the fixation frame, which helps to fix the fracture site more firmly and provide stable support. It can combine the Kirschner wire fixation method and the external fixation frame fixation method, integrate their advantages, and avoid their corresponding disadvantages, so as to provide more firm fixation while allowing early joint movement, shorten the treatment time, and improve the treatment effect. The rubber sleeve forms a soft cushion layer at the connection between the Kirschner wire and the fixation frame, which helps to reduce direct contact between the Kirschner wire and the fixation frame, thereby reducing the discomfort to the patient. The rubber sleeve can absorb external impact and vibration to a certain extent, reduce the impact of these forces on the fracture site, and help the patient's recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic structural diagram of an external fixation device for treating metacarpal neck fractures according to the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional exploded structure of a fixation rod of an external fixation device for treating metacarpal neck fractures according to the present invention;

[0018] Figure 3 This is a schematic diagram of the cross-sectional exploded structure of a fixing sleeve of an external fixation device for treating metacarpal neck fractures according to the present invention;

[0019] Figure 4 This is a schematic diagram of the exploded structure of the first fixing mechanism of an external fixation device for treating metacarpal neck fractures according to the present invention;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the second fixing mechanism of an external fixation device for treating metacarpal neck fractures according to the present invention.

[0021] In the figure: 1. fixing rod; 2. adjusting rod; 3. fixing plate; 4. fixing sleeve; 5. limiting plate; 6. first connecting rod; 7. second connecting rod; 8. connecting plate; 9. first fixing mechanism; 901. first fixing frame; 902. first Kirschner wire; 903. second Kirschner wire; 904. third Kirschner wire; 905. fourth Kirschner wire; 906. first slot; 907. first rubber sleeve; 10. second fixing mechanism; 101. second fixing frame; 102. fifth Kirschner wire; 103. sixth Kirschner wire; 104. seventh Kirschner wire; 105. second slot; 106. second rubber sleeve. DETAILED DESCRIPTION

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 An external fixation device for treating metacarpal neck fracture includes a fixing rod 1, with adjusting rods 2 inserted at both ends of the fixing rod 1, and the ends of the two groups of adjusting rods 2 away from each other are connected to fixing sleeves 4, and the sides of the two groups of fixing sleeves 4 away from each other are respectively fixedly connected to a first connecting rod 6 and a second connecting rod 7, and the lower surfaces of the first connecting rod 6 and the second connecting rod 7 are respectively connected to a first fixing mechanism 9 and a second fixing mechanism 10 through a connecting plate 8.

[0023] The ends of the two groups of adjusting rods 2 that are close to each other are fixedly connected to the fixing plates 3, and the surfaces of the two groups of fixing plates 3 are respectively provided with threads, and the two groups of threads are in opposite directions. Slots are provided at both ends of the fixing rod 1, and the inner walls of the slots are provided with thread grooves that match the threads. The ends of the two groups of adjusting rods 2 that are away from each other are fixedly connected to the limiting plates 5, and the sides of the two groups of fixing sleeves 4 that are close to each other are provided with grooves that match the adjusting rods 2 and the limiting plates 5. The fixing rods 1 are kept stable by holding them by hand, and then the adjusting rods 2 are rotated to drive the two groups of fixing plates 3 to move. At the same time, the limiting plates 5 rotate in the grooves of the fixing sleeves 4 to maintain the stability of the movement of the first connecting rod 6 and the second connecting rod 7, which helps medical staff to make corresponding changes at any time according to the progress of treatment.

[0024] The first fixing mechanism 9 includes a first fixing frame 901, the upper surface of the first fixing frame 901 is fixedly connected to the connecting plate 8, and the lower end of the first fixing frame 901 is provided with a first Kirschner wire 902, a second Kirschner wire 903, a third Kirschner wire 904 and a fourth Kirschner wire 905, the first Kirschner wire 902 and the second Kirschner wire 903 are arranged in an X-shaped cross structure, the third Kirschner wire 904 is arranged at the upper end of the first Kirschner wire 902 and the second Kirschner wire 903, and the fourth Kirschner wire 905 is arranged at the lower end of the first Kirschner wire 902 and the second Kirschner wire 903, and the needle tails of the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire 905 are all arranged in an upward bending structure, and the first fixing frame 901 corresponds to the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire A first slot 906 is provided at the needle tail of the needle 905, and a first rubber sleeve 907 is fixedly connected to the inner wall of the first slot 906, and the first rubber sleeve 907 is arranged in a double-layer structure in the upper and lower positions. By setting the needle tail to an upward curved structure, the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire 905 can be inserted into the first slot 906 on the first fixing frame 901. The friction force of the first rubber sleeve 907 can fix the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire 905, and at the same time, the direct contact between the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire 905 and the first fixing frame 901 can be reduced, thereby reducing the discomfort to the patient.

[0025] The second fixing mechanism 10 includes a second fixing frame 101, the upper surface of the second fixing frame 101 is fixedly connected to the connecting plate 8, the lower end of the second fixing frame 101 is sequentially provided with a fifth Kirschner wire 102, a sixth Kirschner wire 103 and a seventh Kirschner wire 104 in a front-to-back position, the needle tails of the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104 are all configured to be bent upwards, and the second fixing frame 101 is provided with a second slot 105 at the needle tails corresponding to the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104, and the inner wall of the second slot 105 is fixed. A second rubber sleeve 106 is fixedly connected, and the second rubber sleeve 106 is arranged in a double-layer structure in the upper and lower positions. By setting the needle tail to an upward curved structure, the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104 can be inserted into the second slot 105 of the second fixing frame 101. The friction force of the second rubber sleeve 106 fixes the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104. At the same time, the second rubber sleeve 106 can absorb external impact and vibration to a certain extent, reducing the impact of these forces on the fracture site.

[0026] The working principle of the external fixation device for treating metacarpal neck fracture provided by the utility model is as follows:

[0027] First, hold the fixing rod 1 to keep it stable, then rotate the adjusting rod 2 to adjust the first fixing mechanism 9 and the second fixing mechanism 10 to the appropriate position, then cross-insert the first Kirschner wire 902 and the second Kirschner wire 903, and then insert the third Kirschner wire 904 and the fourth Kirschner wire 905 at the metacarpal bone. Finally, insert the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104 in sequence at the proximal bone. The needle tails of the first Kirschner wire 902, the second Kirschner wire 903, the third Kirschner wire 904 and the fourth Kirschner wire 905 are inserted into the first slot 906 and fixed by the first rubber sleeve 907. The needle tails of the fifth Kirschner wire 102, the sixth Kirschner wire 103 and the seventh Kirschner wire 104 are inserted into the second slot 105 and fixed by the second rubber sleeve 106. The above is the entire working principle of the present invention.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An external fixation device for treating metacarpal neck fractures, comprising: A fixing rod (1), characterized in that: both ends of the fixing rod (1) are inserted with adjustment rods (2), and the ends of the two groups of adjustment rods (2) away from each other are connected to fixing sleeves (4), and the sides of the two groups of fixing sleeves (4) away from each other are fixedly connected to a first connecting rod (6) and a second connecting rod (7), respectively, and the lower surfaces of the first connecting rod (6) and the second connecting rod (7) are respectively connected to a first fixing mechanism (9) and a second fixing mechanism (10) through a connecting plate (8).

2. The external fixation device for treating metacarpal neck fracture according to claim 1, characterized in that: The ends of the two groups of adjusting rods (2) that are close to each other are fixedly connected to a fixing plate (3), and the surfaces of the two groups of fixing plates (3) are respectively provided with threads, and the two groups of threads are in opposite directions. Both ends of the fixing rod (1) are provided with slots, and the inner walls of the slots are provided with thread grooves that match the threads.

3. The external fixation device for treating metacarpal neck fracture according to claim 1, characterized in that: The ends of the two groups of adjusting rods (2) that are away from each other are fixedly connected to the limit plate (5), and the sides of the two groups of fixing sleeves (4) that are close to each other are provided with grooves that match the adjusting rods (2) and the limit plate (5).

4. The external fixation device for treating metacarpal neck fracture according to claim 1, characterized in that: The first fixing mechanism (9) includes a first fixing frame (901), the upper surface of the first fixing frame (901) is fixedly connected to the connecting plate (8), and the lower end of the first fixing frame (901) is provided with a first Kirschner wire (902), a second Kirschner wire (903), a third Kirschner wire (904) and a fourth Kirschner wire (905), the first Kirschner wire (902) and the second Kirschner wire (903) are arranged in an X-shaped cross structure, the third Kirschner wire (904) is arranged at the upper ends of the first Kirschner wire (902) and the second Kirschner wire (903), and the fourth Kirschner wire (905) is arranged at the lower ends of the first Kirschner wire (902) and the second Kirschner wire (903).

5. The external fixation device for treating metacarpal neck fracture according to claim 4, characterized in that: The needle tails of the first Kirschner wire (902), the second Kirschner wire (903), the third Kirschner wire (904) and the fourth Kirschner wire (905) are all configured to be bent upwards, and the first fixing frame (901) is provided with a first slot (906) at the needle tails corresponding to the first Kirschner wire (902), the second Kirschner wire (903), the third Kirschner wire (904) and the fourth Kirschner wire (905), and the inner wall of the first slot (906) is fixedly connected to a first rubber sleeve (907), and the first rubber sleeve (907) is configured to have a double-layer structure in an upper and lower position.

6. The external fixation device for treating metacarpal neck fracture according to claim 1, characterized in that: The second fixing mechanism (10) comprises a second fixing frame (101), the upper surface of the second fixing frame (101) is fixedly connected to the connecting plate (8), and the lower end of the second fixing frame (101) is provided with a fifth Kirschner wire (102), a sixth Kirschner wire (103) and a seventh Kirschner wire (104) in a front-to-back position.

7. The external fixation device for treating metacarpal neck fracture according to claim 6, characterized in that: The needle tails of the fifth Kirschner wire (102), the sixth Kirschner wire (103) and the seventh Kirschner wire (104) are all configured as upwardly curved structures, and the second fixing frame (101) is provided with a second slot (105) at the needle tails corresponding to the fifth Kirschner wire (102), the sixth Kirschner wire (103) and the seventh Kirschner wire (104), and the inner wall of the second slot (105) is fixedly connected to a second rubber sleeve (106), and the second rubber sleeve (106) is configured as a double-layer structure in an upper and lower position.

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