Threaded hole supporting intramedullary nail for femur

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a thighbone threaded hole supporting intramedullary nail which comprises a main nail, a cable-stayed force nail, a transverse tension nail and a reinforcing nail, the main nail is provided with a plurality of grooves, a first through hole, a second through hole and a third through hole, first threaded grooves are formed in the first through hole and the second through hole, the cable-stayed force nail is provided with a fourth through hole, and the transverse tension nail is provided with a third through hole. A second threaded groove is formed in the fourth through hole, the oblique tension nail penetrates through the first through hole to form a preset angle with the main nail, the transverse tension nail and the reinforcing nail are both provided with threads, the transverse tension nail sequentially penetrates through the second through hole and the fourth through hole and is in threaded connection with the first threaded groove and the second threaded groove, and the reinforcing nail penetrates through the third through hole and is in threaded connection with the first threaded groove. The transverse tension nails are meshed with the reinforcing nails through threads; the femoral intramedullary nail solves the problem that a transverse tension screw in an existing femoral intramedullary nail is prone to retreating, and is suitable for femoral intertrochanteric fracture.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a femoral threaded hole supporting intramedullary nail. Background Art

[0002] As people age, the chances of intertrochanteric and subtrochanteric fractures of the femur increase. In recent years, intramedullary nails are often used in clinical practice to treat fractures. Intramedullary nails are orthopedic internal fixation devices among medical devices. They are implanted into the femoral medullary cavity through surgery to fix and support the fracture, avoid dislocation and displacement of the fracture, stabilize the fracture site, and prevent the recurrence of the fracture.

[0003] During the postoperative recovery process, since the interior of the femoral head is all cancellous bone, and as the crack is pressurized again by its own weight, the lateral tension screw is easily moved, causing the lateral tension to withdraw the screw, resulting in the femoral intramedullary nail being unable to continue to support the patient's bones, and ultimately requiring a second operation. Utility Model Content

[0004] The utility model aims to provide a femoral threaded hole supporting intramedullary nail, so as to solve the problem that the transverse tension screw in the existing femoral intramedullary nail is easy to be backed out.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The basic technical solution provided by the utility model is: a femoral threaded hole supporting intramedullary nail, comprising a main nail, an oblique tension nail, a transverse tension nail and a reinforcement nail, the main nail is provided with a first through hole, a second through hole and a third through hole, the oblique tension nail is provided with a fourth through hole, the oblique tension nail passes through the first through hole and forms a preset angle with the main nail, the transverse tension nail successively passes through the second through hole and the fourth through hole and forms a preset angle with the main nail, the reinforcement nail passes through the third through hole and forms a preset angle with the main nail, and both the transverse tension nail and the reinforcement nail are provided with threads, and the threads are meshed with each other.

[0007] Principles and beneficial effects of the basic technical solution: the main nail, oblique tension nail and transverse tension nail connect the femoral body and femoral head fractures together, the main nail and transverse tension nail fix the oblique tension nail, so that the device has the ability to resist oblique tension, the threads of the transverse tension nail and the reinforcement nail engage with each other, the reinforcement nail limits the transverse tension nail, effectively preventing the transverse tension nail from lateral displacement, so that the device has the ability to resist lateral tension, and at the same time, the triangular structure of the device is stable, and the positions of the main nail, oblique tension nail and transverse tension nail are relatively fixed, which effectively prevents the displacement and withdrawal of the transverse tension nail or the oblique tension nail.

[0008] Preferably, a first thread groove matching the thread is provided in the second through hole and the third through hole.

[0009] Through the above arrangement, the transverse tension nails and the reinforcement nails are respectively threadedly connected to the main nails to prevent relative displacement between the transverse tension nails, the reinforcement nails and the main nails.

[0010] Preferably, a second thread groove matching the thread is provided in the fourth through hole.

[0011] Through the above arrangement, the transverse tension nail is threadedly connected to the main nail, thereby preventing relative displacement between the transverse tension nail and the oblique tension nail.

[0012] Preferably, the angle between the transverse tension nails, the reinforcement nails and the main nails is 90°.

[0013] Through the above arrangement, the main nail is placed vertically in the bone cavity, the transverse tension nail and the reinforcement nail are relatively perpendicular to the femoral body, and are connected to the femoral body in a transverse connection manner to support the femoral body.

[0014] Preferably, the main nails include an upper main nail and a lower main nail, and the angle between the upper main nail and the lower main nail is 1° to 10°.

[0015] Through the above arrangement, the main nail presents a certain curvature, which is consistent with the shape of the femoral body.

[0016] Preferably, the main nail comprises an upper main nail and a lower main nail, and a plurality of grooves are evenly distributed on the lower main nail.

[0017] Through the above settings, blood circulation is promoted, blood flows faster, and the patient's recovery time is shortened.

[0018] Preferably, the main nails, oblique tension nails, transverse tension nails and reinforcement nails are all hollow structures.

[0019] Through the above arrangement, the hollow structure can reduce the pressure inside the femoral head and prevent femoral head necrosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a femoral threaded hole supporting an intramedullary nail according to the utility model;

[0021] Figure 2 This is a schematic diagram of the explosion structure of a femoral threaded hole supporting an intramedullary nail according to the utility model;

[0022] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0023] Figure 4 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0024] The names of corresponding marks in the accompanying drawings are: main nail 1, oblique tension nail 2, transverse tension nail 3, reinforcement nail 4, first through hole 5, second through hole 6, third through hole 7, fourth through hole 8, thread 9, first thread groove 10, second thread groove 11, upper main nail 12, lower main nail 13, groove 14. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:

[0026] like Figure 1-Figure 4 As shown: A femoral threaded hole supporting intramedullary nail, comprising a main nail 1, an oblique tension nail 2, a transverse tension nail 3 and a reinforcement nail 4, the main nail 1, the oblique tension nail 2, the transverse tension nail 3 and the reinforcement nail 4 are all hollow structures, the main nail 1 comprises a lower main nail 13 and an upper main nail 12, the angle between the lower main nail 13 and the upper main nail 12 is 1° to 10°, a plurality of grooves 14 are evenly distributed on the lower main nail 13, a first through hole 5, a second through hole 6 and a third through hole 7 are provided on the upper main nail 1, and a first thread groove 1 is provided in the first through hole 5 and the second through hole 6 0, the oblique tension nail 2 is provided with a fourth through hole 8, and the fourth through hole 8 is provided with a second thread groove 11. The oblique tension nail 2 passes through the first through hole 5 and forms a preset angle with the main nail 1. The transverse tension nail 3 and the reinforcement nail 4 are both provided with threads 9. The transverse tension nail 3 successively passes through the second through hole 6 and the fourth through hole 8 and is threadedly connected with the first thread groove 10 and the second thread groove 11. The reinforcement nail 4 passes through the third through hole 7 and is threadedly connected with the first thread groove 10. The transverse tension nail 3 and the reinforcement nail 4 are perpendicular to the main nail 1, and the transverse tension nail 3 and the reinforcement nail 4 are meshed with each other through the thread 9.

[0027] The specific implementation process is as follows: first, the main nail 1 is placed in the femoral cavity to support the femoral body, and then the oblique tension nail 2 is inserted into the femoral body, and the front end of the oblique tension nail 2 passes through the first through hole 5 and penetrates into the femoral head to complete the connection between the oblique tension nail 2 and the femoral head, thereby realizing the connection between the femoral body and the broken femoral head; then, the transverse tension nail 3 is inserted into the femoral body, and the front end of the transverse tension nail 3 passes through the second through hole 6 and the fourth through hole 8 in turn, and the front end of the transverse tension nail 3 is inserted into the femoral head to complete the connection between the transverse tension nail 3 and the femoral head, thereby strengthening the connection between the femoral body and the femoral head; finally, the reinforcement nail 4 is inserted into the femoral body and threadedly connected with the third through hole 7, and the transverse tension nail 3 is meshed with the reinforcement nail 4 through the thread 9, effectively preventing the transverse tension nail 3 from moving.

[0028] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A femoral threaded hole supporting intramedullary nail, characterized in that: The invention comprises a main nail (1), an oblique tension nail (2), a transverse tension nail (3) and a reinforcement nail (4); the main nail (1) is provided with a first through hole (5), a second through hole (6) and a third through hole (7); the oblique tension nail (2) is provided with a fourth through hole (8); the oblique tension nail (2) passes through the first through hole (5) and forms a preset angle with the main nail (1); the transverse tension nail (3) successively passes through the second through hole (6) and the fourth through hole (8) and forms a preset angle with the main nail (1); the reinforcement nail (4) passes through the third through hole (7) and forms a preset angle with the main nail (1); the transverse tension nail (3) and the reinforcement nail (4) are both provided with threads (9), and the threads (9) are meshed with each other.

2. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: The second through hole (6) and the third through hole (7) are both provided with a first thread groove (10) matching the thread (9).

3. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: A second thread groove (11) matching the thread (9) is provided in the fourth through hole (8).

4. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: The angle between the transverse tension nail (3), the reinforcement nail (4) and the main nail (1) is 90°.

5. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: The main nail (1) comprises an upper main nail (12) and a lower main nail (13), and the angle between the upper main nail (12) and the lower main nail (13) is 1° to 10°.

6. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: The main nail (1) comprises an upper main nail (12) and a lower main nail (13), and a plurality of grooves (14) are evenly distributed on the lower main nail (13).

7. A femoral threaded hole supporting intramedullary nail according to claim 1, characterized in that: The main nail (1), the oblique tension nail (2), the transverse tension nail (3) and the reinforcement nail (4) are all hollow structures.

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