Femoral intramedullary nail

Abstract

The utility model discloses a femoral intramedullary nail which comprises a main nail and a locking nail, the main nail is columnar, the main nail is provided with a guide section, the guide section is located at the top end of the main nail, and the radian of the guide section is 15-20 degrees; the locking nails comprise a plurality of first locking nails and a plurality of second locking nails, the first locking nails are arranged at the top end of the main nail, the second locking nails are arranged at the bottom end of the main nail, and the first locking nails and the second locking nails are in threaded connection with the main nail. The main nail can be inserted by taking the outer side of the major trochanter as a needle insertion point, and an incision can be formed in the outer side wall of the major trochanter during an operation, so that the difficulty of the operation is reduced; a surgical incision avoids abductor muscle groups, so that the influence of ilium and abundant muscle and fat on surgical operation can be prevented, the requirement on a traction operating table is reduced, the operation of a doctor is facilitated, and the surgical time is shortened; the locking nail is in threaded connection with the main nail, the formed frame structure is stable, and complications such as looseness and cutting-out of the intramedullary nail can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a femoral intramedullary nail. Background Technology

[0002] Femoral fractures are common in clinical practice, and intramedullary nails are currently the most commonly used implants for treating femoral fractures. However, existing intramedullary nails are limited by their own structure, with the entry point being the apex of the greater trochanter or the piriform fossa. This entry point results in significant surgical trauma, especially for obese patients, making the surgery very difficult. The incision requires separating the abductor muscle group to reach the entry point, which can damage the gluteus medius and other abductor muscles to varying degrees. Many patients still experience postoperative limping even if the fracture heals very well, with literature reports reaching up to 20%, becoming a difficult problem for clinicians and patients alike. Utility Model Content

[0003] Therefore, this utility model provides a femoral intramedullary nail to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] According to a first aspect of the present invention, a femoral intramedullary nail includes a main nail and a locking nail, wherein the main nail is columnar, the main nail is provided with a guide section, the guide section is located at the top of the main nail, and the curvature of the guide section is 15° to 20°.

[0006] The locking pin includes a first locking pin and a second locking pin, and there are multiple first locking pins and multiple second locking pins. The first locking pin is located at the top end of the main pin, and the second locking pin is located at the bottom end of the main pin. Both the first locking pin and the second locking pin are threadedly connected to the main pin.

[0007] Furthermore, the main nail is hollow, and the main nail is provided with a first threaded hole and a second threaded hole. Both the first threaded hole and the second threaded hole penetrate the main nail, and the first threaded hole and the second threaded hole are respectively provided in a one-to-one correspondence with the first locking nail and the second locking nail.

[0008] Furthermore, there are multiple first locking pins and multiple second locking pins.

[0009] Furthermore, the two first locking pins are arranged parallel to each other, and the two second locking pins are arranged parallel to each other.

[0010] Furthermore, one of the first locking pins is horizontally positioned, the other first locking pin is downwardly positioned, and the two second locking pins are positioned parallel to each other.

[0011] Furthermore, the master nail is hollow.

[0012] Furthermore, the top of the main nail is provided with a positioning locking head.

[0013] This invention has the following advantages: The curved design of the guide section allows the main nail to be inserted from the outer side of the greater trochanter. During surgery, the incision can be placed on the outer wall of the greater trochanter, which is one of the bony landmarks of the human body. Even for very strong and obese patients, the location point can be easily found, reducing the difficulty of the surgery. The surgical incision avoids the abductor muscle group; only the inner muscle group needs to be cut, thus avoiding complications caused by muscle damage, such as pain, limping, and weakness. The outer placement of the needle entry point prevents the iliac bone and abundant muscles and fat from affecting the surgical operation, reduces the requirements for the traction operating table, facilitates the doctor's operation, shortens the operation time, and reduces bleeding and other surgical complications. The locking nail and the main nail are connected by threads, forming a stable frame structure that prevents complications such as loosening and extrusion of the intramedullary nail. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of a femoral intramedullary nail provided for some embodiments of the present invention.

[0017] In the diagram: 1. Main nail, 2. First locking nail, 3. Second locking nail, 4. Femur, 5. Fracture site. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Example 1

[0020] like Figure 1 As shown, a femoral intramedullary nail according to the first aspect of this utility model includes a main nail 1 and a locking nail. The main nail 1 is columnar and has a guide section located at the top of the main nail 1. The curvature of the guide section is 15° to 20°. Specifically, the curvature of the guide section can be set to 15°, 16°, 17°, 18°, 19° or 20°. By setting the guide section, the main nail 1 can be inserted into the femur 4 from the outside of the greater trochanter. Then, the locking nail is used to fix the main nail 1 in the femur 4, thereby fixing the fracture site 5.

[0021] The main nail 1 is hollow, which makes it easy to insert the main nail 1 into the femur 4 through the guide pin. The top of the main nail 1 is equipped with a positioning locking head, which makes it easy to adjust the angle of the main nail 1 so that it can be smoothly inserted into the femur 4. At the same time, the angle of the main nail 1 can be quickly adjusted to facilitate the installation and fixation of the locking nail.

[0022] The locking pin includes a first locking pin 2 and a second locking pin 3. There are multiple first locking pins 2 and second locking pins 3. The first locking pin 2 is located at the top of the main pin 1, and the second locking pin 3 is located at the bottom of the main pin 1. Both the first locking pin 2 and the second locking pin 3 are threadedly connected to the main pin 1. The top of the main pin 1 is the end of the main pin 1 that is close to the large rotor after installation, and the bottom of the main pin 1 is the end of the main pin 1 that is away from the large rotor after installation.

[0023] In this embodiment, it should be noted that the main nail 1 is provided with a first threaded hole and a second threaded hole, both of which penetrate the main nail 1. The first threaded hole and the second threaded hole are respectively provided in a one-to-one correspondence with the first locking nail 2 and the second locking nail 3. The first locking nail 2 and the second locking nail 3 are respectively threadedly connected to the main nail 1 through the first threaded hole and the second threaded hole.

[0024] Furthermore, there are two of each of the first locking pin 2 and the second locking pin 3. Depending on the usage requirements, the number of the first locking pin 2 and the second locking pin 3 can also be set to three, four, etc.

[0025] The technical effects achieved in this embodiment are as follows: The curved design of the guide section allows the main nail to be inserted using the outer side of the greater trochanter as the entry point. During surgery, the incision can be placed on the outer wall of the greater trochanter, which is one of the bony landmarks of the human body. Even for very strong and obese patients, the location point can be easily found, reducing the difficulty of the surgery. The surgical incision avoids the abductor muscle group; only the inner muscle group needs to be cut, thus avoiding complications caused by muscle damage, such as pain, limping, and weakness. The outer entry point prevents the iliac bone and abundant muscles and fat from affecting the surgical operation, reduces the requirements for the traction operating table, facilitates the doctor's operation, shortens the operation time, and reduces bleeding and other surgical complications. The locking nail and the main nail 1 are connected by threads, forming a stable frame structure that prevents complications such as loosening and extrusion of the intramedullary nail.

[0026] Example 2

[0027] like Figure 1 As shown in the figure, another femoral intramedullary nail provided in this embodiment has the same structure as in embodiment 1. Only the different parts are described below.

[0028] In this embodiment, when there are two first locking pins 2 and two second locking pins 3, the two first locking pins 2 are arranged in parallel with each other, and the two second locking pins 3 are arranged in parallel with each other, which facilitates installation and fixation.

[0029] In this embodiment, it should be noted that the first locking pin 2 is set at an angle, and the second locking pin 3 is set horizontally.

[0030] Example 3

[0031] like Figure 1 As shown in the figure, another femoral intramedullary nail provided in this embodiment has the same structure as in embodiment 1. Only the different parts are described below.

[0032] In this embodiment, when there are two first locking pins 2 and two second locking pins 3, one first locking pin 2 is set horizontally and the other first locking pin 2 is set downwards, and the two second locking pins 3 are set parallel to each other.

[0033] In this embodiment, it should be noted that the included angle between the two first locking pins 2 is 30° to 60°, which can form a more stable fixing effect, resulting in better fixing effect after installation and making it less prone to loosening.

[0034] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0035] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A femoral intramedullary nail, characterized in that, Includes a main pin (1) and a locking pin. The main pin (1) is columnar and has a guide section located at the top of the main pin (1). The arc of the guide section is 15° to 20°. The locking pin includes a first locking pin (2) and a second locking pin (3). There are multiple first locking pins (2) and second locking pins (3). The first locking pin (2) is located at the top of the main pin (1), and the second locking pin (3) is located at the bottom of the main pin (1). Both the first locking pin (2) and the second locking pin (3) are threadedly connected to the main pin (1). The main nail (1) is hollow, and the top of the main nail (1) is provided with a positioning locking head. The main nail (1) is provided with a first threaded hole and a second threaded hole. The first threaded hole and the second threaded hole both penetrate the main nail (1). The first threaded hole and the second threaded hole are respectively provided in a one-to-one correspondence with the first locking nail (2) and the second locking nail (3).

2. The femoral intramedullary nail according to claim 1, characterized in that, The number of the first locking pin (2) and the second locking pin (3) are both multiple.

3. The femoral intramedullary nail according to claim 2, characterized in that, The two first locking pins (2) are arranged parallel to each other, and the two second locking pins (3) are arranged parallel to each other.

4. The femoral intramedullary nail according to claim 2, characterized in that, One of the first locking pins (2) is set horizontally, the other first locking pin (2) is set downwards, and the two second locking pins (3) are set parallel to each other.

5. The femoral intramedullary nail according to claim 1, characterized in that, The master nail (1) is hollow.

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