Minimally invasive intramedullary fixing device for clavicle fracture

Abstract

The utility model discloses a minimally invasive intramedullary fixing device for clavicle fracture, which comprises a near-end intramedullary nail and a far-end intramedullary nail, the front surface of the near-end intramedullary nail is fixedly connected with an upper connecting plate, the front surface of the far-end intramedullary nail is fixedly connected with a lower connecting plate, the near-end intramedullary nail is provided with a positioning hole, and the near-end intramedullary nail is provided with a lower connecting plate. A positioning cylinder is slidably connected into the positioning hole, a supporting plate is fixedly connected to the end, away from the positioning hole, of the positioning cylinder, a near-end reset nail is slidably connected to the supporting plate, a sliding rod is slidably connected into the supporting plate, and the device further comprises a connecting assembly, a driving assembly and a limiting assembly. The L-shaped rods on the two sides are driven by the pressing rod to move downwards, the inserting rod is inserted into the far-end intramedullary nail, the L-shaped rods are driven to be inserted into the inserting holes under the action of the spring, the far-end intramedullary nail and the near-end intramedullary nail are pulled out of the clavicle through the handle, and a doctor does not need to detach fixing screws one by one.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic medical device technology, and in particular to a minimally invasive intramedullary fixation device for clavicle fractures. Background Technology

[0002] The development of orthopedic medical devices has a long history, initially focusing on simple fixation and support tools. For example, in ancient times, wooden boards and strips of cloth were used to provide simple fixation for fractures, with the aim of restricting the movement of the injured limb and promoting fracture healing.

[0003] Treatment options for clavicle fractures mainly include non-surgical treatment and open reduction and internal fixation with plates. While non-surgical treatment avoids surgical trauma, the fixation effect is often less than ideal, requiring patients to immobilize for extended periods. This can lead to complications such as loss of fracture reduction and malunion, and the recovery period is long, significantly impacting the patient's quality of life.

[0004] Current clavicle fracture fixation devices typically use a steel plate precisely fixed to the fractured clavicle to ensure stable bone healing. However, this method of fixation is quite complex to remove postoperatively, requiring surgeons to loosen and remove each screw attached to the plate individually. This process is not only time-consuming and laborious but also significantly increases the complexity of the surgical procedure. Therefore, this application proposes a minimally invasive intramedullary fixation device for clavicle fractures. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a minimally invasive intramedullary fixation device for clavicle fractures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A minimally invasive intramedullary fixation device for clavicle fractures includes a proximal intramedullary nail and a distal intramedullary nail. An upper connecting plate is fixedly connected to the anterior surface of the proximal intramedullary nail, and a lower connecting plate is fixedly connected to the anterior surface of the distal intramedullary nail. A positioning hole is provided on the proximal intramedullary nail, and a positioning cylinder is slidably connected in the positioning hole. A support plate is fixedly connected to the end of the positioning cylinder away from the positioning hole. A proximal reduction nail is slidably connected to the support plate. Two sliding rods are slidably connected inside the support plate, and mounting plates are fixedly connected to the ends of the two sliding rods away from the support plate.

[0008] The proximal intramedullary nail has an insertion hole at its rear end, and an insertion rod is slidably connected in the insertion hole. A handle is fixedly connected to the end of the insertion rod away from the insertion hole.

[0009] A limiting hole is provided on the distal intramedullary nail, and a distal repositioning nail is slidably connected to the inner wall of the limiting hole.

[0010] Also includes:

[0011] A connecting component for connecting an upper connecting plate and a lower connecting plate;

[0012] A driving component, the driving component being used to drive the distal reset pin to slide horizontally;

[0013] A limiting component, which is used to limit the insertion rod.

[0014] Preferably, the connection component includes:

[0015] Through holes, which are symmetrically formed on the top surface of the upper connecting plate;

[0016] A fixing screw is threadedly connected to the upper connecting plate through a through hole;

[0017] Threaded holes are symmetrically formed on the lower connecting plate, and the fixing screws are threaded into the threaded holes.

[0018] Preferably, the mounting plate has a groove.

[0019] Preferably, the driving component includes:

[0020] A threaded rod, which is rotatably connected to the inner wall of the groove;

[0021] A slider is threadedly connected to a threaded rod, and the slider has internal threads that match the threaded rod. The slider is fixedly connected to a distal reset pin.

[0022] A rotating handle, which is fixedly connected to the top end of a threaded rod.

[0023] Preferably, the limiting component includes:

[0024] A baffle, which is fixedly connected to the inner wall of the insertion rod;

[0025] A spring, which is fixedly connected to the upper and lower sides of the baffle;

[0026] An L-shaped rod is fixedly connected to the end of the spring away from the baffle.

[0027] A pressure bar is fixedly connected to an L-shaped bar, and the top of the pressure bar has a circular upward protrusion.

[0028] Preferably, a cavity that fits into the L-shaped rod is formed on the inner surface of the insertion hole.

[0029] This utility model has the following beneficial effects:

[0030] 1. By pressing down on the lever, the L-shaped rod at the bottom moves down and compresses the spring. At this time, the insertion rod is inserted into the insertion hole on the side of the distal intramedullary nail. When the L-shaped rod contacts the cavity in the insertion hole, the spring causes the L-shaped rod to reset and be inserted into the cavity. At this time, the distal and proximal intramedullary nails can be pulled out from the clavicle by pulling the handle. There is no need for the doctor to remove the fixation screws one by one. Moreover, the patient's safety can be ensured throughout the entire removal process, while avoiding the risk of accidental injury caused by improper operation.

[0031] 2. By implanting the proximal and distal intramedullary nails into the fractured clavicle at both ends, the distal reduction nail is inserted into the limiting hole, while the proximal reduction nail is inserted into the end of the proximal intramedullary nail. Rotating the handle drives the threaded rod to rotate, and the external sleeve slider then pulls the two fractured parts of the clavicle towards the middle for reduction. When the upper and lower connecting plates are in contact, the fixation screws are passed through the through hole and screwed into the threaded hole to tightly combine the proximal and distal intramedullary nails, ensuring precise and stable repair of the clavicle. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of a minimally invasive intramedullary fixation device for clavicle fractures proposed in this utility model;

[0033] Figure 2 This is a cross-sectional structural diagram of the insertion rod in this utility model;

[0034] Figure 3 This is a schematic cross-sectional view of the distal intramedullary nail of this utility model;

[0035] Figure 4 This is a schematic diagram of the proximal intramedullary nail in this utility model.

[0036] In the diagram: 1. Proximal intramedullary nail, 11. Upper connecting plate, 12. Fixing screw, 13. Positioning hole, 14. Through hole, 2. Distal intramedullary nail, 21. Lower connecting plate, 22. Threaded hole, 23. Limiting hole, 24. Insertion hole, 3. Positioning cylinder, 4. Support plate, 41. Proximal repositioning nail, 5. Slide rod, 6. Mounting plate, 61. Groove, 62. Threaded rod, 63. Rotary handle, 64. Slider, 65. Distal repositioning nail, 7. Insertion rod, 71. Baffle, 72. Spring, 73. L-shaped rod, 74. Pressure rod, 8. Handle. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Reference Figures 1 to 4A minimally invasive intramedullary fixation device for clavicle fractures includes a proximal intramedullary nail 1 and a distal intramedullary nail 2. An upper connecting plate 11 is fixedly connected to the anterior surface of the proximal intramedullary nail 1, and a lower connecting plate 21 is fixedly connected to the anterior surface of the distal intramedullary nail 2. The upper connecting plate 11 and the lower connecting plate 21 are arranged in a semi-circular shape, so that they can fit together tightly to form a complete circular structure, which is more stable during connection and can withstand greater force and pressure, thereby ensuring the stability and safety of the entire structure.

[0039] A limiting hole 23 is provided on the distal intramedullary nail 2, and a distal repositioning nail 65 is slidably connected to the inner wall of the limiting hole 23. A positioning hole 13 is provided on the proximal intramedullary nail 1, and a positioning cylinder 3 is slidably connected inside the positioning hole 13. The positioning cylinder 3 is hollow and can be used to accurately implant the reinforcing nail into the proximal intramedullary nail 1.

[0040] A support plate 4 is fixedly connected to the end of the positioning cylinder 3 away from the positioning hole 13. A proximal reset pin 41 is slidably connected to the support plate 4. A slide rod 5 is slidably connected inside the support plate 4. There are two slide rods 5. A mounting plate 6 is fixedly connected to the end of the two slide rods 5 away from the support plate 4. A groove 61 is opened on the mounting plate 6.

[0041] The proximal intramedullary nail 1 has an insertion hole 24 at its rear end. A cavity that fits with the L-shaped rod 73 is formed on the inner surface of the insertion hole 24. An insertion rod 7 is slidably connected in the insertion hole 24. A handle 8 is fixedly connected to the end of the insertion rod 7 away from the insertion hole 24.

[0042] It also includes a connecting component, a driving component, and a limiting component. The connecting component is used to connect the upper connecting plate 11 and the lower connecting plate 21. The connecting component includes a through hole 14, a fixing screw 12, and a threaded hole 22. The through hole 14 is symmetrically opened on the top surface of the upper connecting plate 11. The fixing screw 12 is threaded to the upper connecting plate 11 through the through hole 14. The threaded hole 22 is symmetrically opened on the lower connecting plate 21. The fixing screw 12 is threaded to the threaded hole 22.

[0043] The drive assembly is used to drive the distal reset pin 65 to slide horizontally. The drive assembly includes a threaded rod 62, a slider 64 and a handle 63. The threaded rod 62 is rotatably connected to the inner wall of the groove 61. The slider 64 is threadedly connected to the threaded rod 62. The inside of the slider 64 is provided with threads that match the threaded rod 62. The slider 64 is fixedly connected to the distal reset pin 65. The handle 63 is fixedly connected to the top end of the threaded rod 62.

[0044] The limiting assembly is used to limit the insertion rod 7. The limiting assembly includes a baffle 71, a spring 72, an L-shaped rod 73, and a pressure rod 74. The baffle 71 is fixedly connected to the inner wall of the insertion rod 7. The spring 72 is fixedly connected to the upper and lower sides of the baffle 71. The L-shaped rod 73 is fixedly connected to the end of the spring 72 away from the baffle 71, so that the L-shaped rod 73 can provide a limiting effect in the horizontal and vertical directions. Through the elastic force of the spring 72, the L-shaped rod 73 can fit tightly against the inner wall of the insertion rod 7, thereby limiting the movement range of the insertion rod 7. The pressure rod 74 is fixedly connected to the L-shaped rod 73. The top of the pressure rod 74 is provided with a circular upward protrusion.

[0045] In this invention, the proximal intramedullary nail 1 and the distal intramedullary nail 2 are first implanted into the two ends of the fractured clavicle. The distal reduction nail 65 is inserted into the limiting hole 23, and the proximal reduction nail 41 is inserted into the end of the proximal intramedullary nail 1. The rotating handle 63 drives the threaded rod 62 to rotate, and the external sleeve slider 64 then drives the distal reduction nail 65 to move horizontally, while simultaneously pulling the two fractured parts of the clavicle towards the middle for reduction. When the upper connecting plate 11 and the lower connecting plate 21 are attached together, the proximal intramedullary nail 1 and the distal intramedullary nail 2 can be tightly joined together by passing the fixing screw 12 through the through hole 14 and screwing it into the threaded hole 22, ensuring that the clavicle is repaired accurately and stably.

[0046] When the patient has recovered and it is necessary to remove the proximal intramedullary nail 1 and the distal intramedullary nail 2, by pressing down on the pressure rod 74, the L-shaped rod 73 at the bottom is moved down into the interior of the insertion rod 7 and the spring 72 is squeezed. At this time, the insertion rod 7 is inserted into the insertion hole 24 on one side of the distal intramedullary nail 2. When the L-shaped rod 73 contacts the cavity in the insertion hole 24, under the action of the spring 72, the L-shaped rod 73 is driven to reset and inserted into the cavity. At this time, the distal intramedullary nail 2 and the proximal intramedullary nail 1 can be pulled out from the clavicle by pulling the handle 8 outward.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A minimally invasive intramedullary fixation device for clavicular fracture, comprising a proximal intramedullary nail (1) and a distal intramedullary nail (2), characterized in that, The front surface of the proximal intramedullary nail (1) is fixedly connected with an upper connecting plate (11), the front surface of the distal intramedullary nail (2) is fixedly connected with a lower connecting plate (21), the proximal intramedullary nail (1) is provided with a positioning hole (13), the positioning hole (13) is slidably connected with a positioning cylinder (3), one end of the positioning cylinder (3) away from the positioning hole (13) is fixedly connected with a support plate (4), the support plate (4) is slidably connected with a proximal reset nail (41), the inside of the support plate (4) is slidably connected with a sliding rod (5), the sliding rod (5) is provided with two, one end of the two sliding rods (5) away from the support plate (4) is fixedly connected with a mounting plate (6); The rear end of the proximal intramedullary nail (1) is provided with a insertion hole (24), the insertion hole (24) is slidably connected with an insertion rod (7), one end of the insertion rod (7) away from the insertion hole (24) is fixedly connected with a handle (8); The distal intramedullary nail (2) is provided with a limiting hole (23), the inner wall of the limiting hole (23) is slidably connected with a distal reset nail (65); It also includes: A connecting assembly for connecting the upper connecting plate (11) and the lower connecting plate (21); A driving assembly for driving the distal reset nail (65) to slide horizontally; A limiting assembly for limiting the insertion rod (7).

2. The minimally invasive intramedullary clavicular fracture fixation device of Claim 1, wherein, The connecting assembly includes: A through hole (14) symmetrically provided on the top surface of the upper connecting plate (11); A fixed screw (12) threadedly connected to the upper connecting plate (11) through the through hole (14); A threaded hole (22) symmetrically provided on the lower connecting plate (21), and the fixed screw (12) is threadedly connected in the threaded hole (22).

3. The minimally invasive intramedullary clavicular fracture fixation device of Claim 1, wherein, The mounting plate (6) is provided with a groove (61).

4. The minimally invasive intramedullary clavicular fracture fixation device of Claim 1, wherein, The driving assembly includes: A threaded rod (62) rotatably connected to the inner wall of the groove (61); A sliding block (64) threadedly connected to the threaded rod (62), the inside of the sliding block (64) is provided with a thread matched with the threaded rod (62), and the sliding block (64) is fixedly connected with the distal reset nail (65); A handle (63) fixedly connected to the top end of the threaded rod (62).

5. The minimally invasive intramedullary clavicular fracture fixation device of Claim 1, wherein, The limiting assembly includes: A baffle (71) fixedly connected to the inner side wall of the insertion rod (7); A spring (72) fixedly connected to the upper and lower sides of the baffle (71); An L-shaped rod (73) fixedly connected to one end of the spring (72) away from the baffle (71); A pressing rod (74) fixedly connected to the L-shaped rod (73), and the top of the pressing rod (74) is provided with a circular upward protrusion.

6. A minimally invasive intramedullary fixation device for clavicular fractures according to claim 1, wherein, The inner surface of the insertion hole (24) is provided with a cavity matched with the L-shaped rod (73).

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