Adjusting and fixing type bone nail

Abstract

The utility model relates to the technical field of medical instruments, in particular to an adjustable fixing type bone nail which comprises an upper bone nail head, an upper nail rod is connected to the bottom end of the upper bone nail head, a lower nail rod is connected to the end, away from the upper bone nail head, of the outer wall of the upper nail rod, and the upper bone nail head, the upper nail rod and the lower nail rod are connected through fixing parts. According to the bone nail, the bone nail is divided into the upper bone nail head, the upper nail rod and the lower nail rod, so that a person can estimate the required length of the bone nail according to the illness state of a patient and the bone condition, then the required length size of the bone nail is guaranteed by replacing the upper nail rod, and the situation that the bone nail is too long or too short, so that the bone nail is damaged is avoided. The treatment effect of the fracture and the success rate of bone healing are influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical appliances, and particularly relates to an adjustable fixed bone nail. Background Art

[0002] A fixed bone nail (also known as an internal bone nail, an intramedullary nail or a bone fixation nail) is a medical device used to stabilize and fix a fractured part. In the treatment of fractures, the fixed bone nail can provide strong support and contribute to bone healing.

[0003] However, most of the existing fixed bone nails are of an integral fixed structure, and their length is fixed without an adjustable function. However, the bone structures and conditions of each patient are mostly different, and the fixed-length bone nails cannot be widely applicable. Therefore, it is necessary to select a bone nail with a suitable length in advance. If the length is selected improperly, it may cause the bone nail to be too long or too short, affecting the treatment effect of the fracture and the success rate of bone healing, thus causing unnecessary injuries to the patient. Therefore, there are still some deficiencies.

[0004] In summary, it is necessary to invent an adjustable fixed bone nail. Content of the Utility Model

[0005] Therefore, the utility model provides an adjustable fixed bone nail to solve the problem that the bone structures and conditions of each patient are mostly different, and the fixed-length bone nails cannot be widely applicable. Therefore, it is necessary to select a bone nail with a suitable length in advance. If the length is selected improperly, it may cause the bone nail to be too long or too short, affecting the treatment effect of the fracture and the success rate of bone healing.

[0006] To achieve the above object, the utility model provides the following technical solution: an adjustable fixed bone nail, comprising an upper bone nail head, the bottom end of the upper bone nail head is connected with an upper nail rod, one end of the outer wall of the upper nail rod away from the upper bone nail head is connected with a lower nail rod, and the upper bone nail head, the upper nail rod and the lower nail rod are connected through a fixing component.

[0007] Preferably, a first nail cap is integrally fixed to the top end of the outer wall of the upper bone nail head, and a bone nail tip is integrally fixed to the outer wall of the lower nail rod on the side away from the upper nail rod.

[0008] Preferably, a fixing support block is further fixed to the top end of the outer surface of the upper bone nail head, a second top cap is fixed to the outer wall of the fixing support block on the side away from the upper bone nail head, and positioning holes are formed through the front and rear ends of the outer wall of the fixing support block.

[0009] Preferably, the fixing component is a spline shaft, the spline shaft is fixed to the top ends of the outer walls of the upper nail rod and the lower nail rod, and fixing pin shafts are fixed to the outer walls of the upper nail rod and the lower nail rod at the top ends and on the outer side of the spline shaft.

[0010] Preferably, a plurality of the fixed pin shafts are uniformly arranged in an annular array, and spline grooves are formed at the bottom ends of the outer walls of the upper bone nail head and the upper nail rod at positions corresponding to the spline shaft, and the outer walls of the spline shafts are in spline connection with the inner walls of the spline grooves.

[0011] Preferably, fixing pin holes are formed at the bottom ends of the outer walls of the upper bone nail head and the upper nail rod at positions corresponding to the fixed pin shafts, magnetic attraction blocks are fixed on the inner walls of the fixing pin holes, the outer walls of the fixed pin shafts are slidably connected with the inner walls of the fixing pin holes, and the fixed pin shafts are magnetically connected with the magnetic attraction blocks.

[0012] Preferably, a first insertion hole is formed through the side end of the outer wall of the spline shaft, a second insertion hole is formed in the outer wall of the upper bone nail head and the upper nail rod at a position corresponding to the first insertion hole, and the first insertion hole and the second insertion hole are connected by a locking insertion shaft.

[0013] Preferably, the fixing member is a threaded insertion shaft, a plurality of the threaded insertion shafts are respectively fixed at the centers of the top ends of the outer walls of the upper nail rod and the lower nail rod, and external thread rings are fixed on the outer walls of the upper nail rod and the lower nail rod at the top ends and located outside the threaded insertion shafts.

[0014] Preferably, internal thread holes are formed at the bottom ends of the outer walls of the upper bone nail head and the upper nail rod at positions corresponding to the threaded insertion shafts, the outer walls of the threaded insertion shafts are in threaded connection with the inner walls of the internal thread holes, external thread holes are formed at the bottom ends of the outer walls of the upper bone nail head and the upper nail rod at positions corresponding to the external thread rings, and the external thread rings are in threaded connection with the inner walls of the external thread holes.

[0015] The beneficial effects of the present utility model are as follows:

[0016] In the present utility model, by dividing the bone nail into three parts, namely an upper bone nail head, an upper nail rod and a lower nail rod, a person can estimate the required length of the bone nail according to the patient's condition and bone condition, and then replace the upper nail rod to ensure that the bone nail is of the required length dimension, avoiding the situation that the fracture treatment effect and the success rate of bone healing are affected due to the bone nail being too long or too short. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the bone nail after installation in Embodiment 1 of the present utility model;

[0018] Figure 2 is an exploded structural diagram of the bone nail in Embodiment 1 of the present utility model;

[0019] Figure 3 is a front view three-dimensional structural diagram of the upper nail rod in Embodiment 1 of the present utility model;

[0020] Figure 4 is a bottom view three-dimensional structural diagram of the upper nail rod in Embodiment 1 of the present utility model;

[0021] Figure 5 Schematic diagram of the bone nail explosion structure in the second embodiment of the present utility model;

[0022] Figure 6 Schematic three-dimensional structure diagram of the upper nail rod in a top view in the second embodiment of the present utility model.

[0023] In the figure: 100, the first nail cap; 110, the upper bone nail head; 120, the fixed support block; 130, the second top cap; 200, the upper nail rod; 300, the lower nail rod; 400, the bone nail tip; 500, the spline shaft; 501, the first jack; 502, the fixed pin shaft; 503, the spline groove; 504, the fixed pin hole; 505, the locking insertion shaft; 510, the threaded insertion shaft; 511, the external thread ring; 512, the internal thread hole; 513, the external thread hole. Specific implementation manners

[0024] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model. Embodiment

[0025] Referring to the attached Figures 1-4 , a kind of adjustable fixed bone nail provided by the present utility model includes an upper bone nail head 110. The bottom end of the upper bone nail head 110 is connected to an upper nail rod 200. One end of the outer wall of the upper nail rod 200 far from the upper bone nail head 110 is connected to a lower nail rod 300. The top end of the outer wall of the upper bone nail head 110 is integrally fixed with a first nail cap 100. The first nail cap 100 is provided to facilitate the personnel to screw the bone nail. The outer wall of the lower nail rod 300 far from the upper nail rod 200 is integrally fixed with a bone nail tip 400;

[0026] The upper bone nail head 110, the upper nail rod 200 and the lower nail rod 300 are connected by a fixing component. The fixing component is a spline shaft 500. The spline shaft 500 is fixed at the top end of the outer walls of the upper nail rod 200 and the lower nail rod 300. Fixing pin shafts 502 are fixed at the top end of the outer walls of the upper nail rod 200 and the lower nail rod 300 and on the outer side of the spline shaft 500. The multiple fixing pin shafts 502 are evenly arranged in an annular array. Spline grooves 503 are provided at the bottom end of the outer walls of the upper bone nail head 110 and the upper nail rod 200 at positions corresponding to the spline shaft 500. The outer walls of the spline shaft 500 are in spline connection with the inner walls of the spline grooves 503. Specifically, when assembling the bone nail, the spline shaft 500 can be inserted into the opened spline grooves 503. The spline connection between the spline shaft 500 and the spline grooves 503 can ensure the structural stability during rotation. Fixing pin holes 504 are provided at the bottom end of the outer walls of the upper bone nail head 110 and the upper nail rod 200 at positions corresponding to the fixing pin shafts 502. Magnetic attraction blocks are fixed on the inner walls of the fixing pin holes 504. The outer walls of the fixing pin shafts 502 are slidably connected to the inner walls of the fixing pin holes 504. The fixing pin shafts 502 are magnetically connected to the magnetic attraction blocks. Specifically, the provided fixing pin shafts 502 can be inserted into the corresponding fixing pin holes 504 during installation, so as to assist the spline shaft 500 to bear the stress during rotation and ensure the fixing strength of the bone nail during rotation. A first insertion hole 501 is provided through the side end of the outer wall of the spline shaft 500. Second insertion holes are provided on the outer walls of the upper bone nail head 110 and the upper nail rod 200 at positions corresponding to the first insertion hole 501. The first insertion hole 501 and the second insertion holes are connected by a locking insertion shaft 505. After the person inserts the spline shaft 500 into the first insertion hole 501, the opened first insertion hole 501 and the second insertion holes will be aligned. Then the person can take out the locking insertion shaft 505 and insert the locking insertion shaft 505 into the first insertion hole 501 and the second insertion holes, so as to fix the spline shaft 500 and the spline grooves 503 and avoid detachment during use. The locking insertion shaft 505 and the first insertion hole 501 and the second insertion holes can adopt an interference fit, and the interference size should not be too large to ensure stability after the locking insertion shaft 505 is inserted into the first insertion hole 501 and the second insertion holes.

[0027] The usage process of the present utility model is as follows: Among those skilled in the art, first, the personnel can judge the required length of the bone nail according to the patient's condition and bone structure, then select an upper nail rod 200 of a suitable size, and then insert the spline shaft 500 fixed at the upper end of the upper nail rod 200 into the spline groove 503 opened at the bottom end of the upper bone nail head 110, and make the fixing pin shaft 502 be able to insert into the fixing pin hole 504, and make the first jack 501 align with the second jack. After completion, the personnel can take out the locking insertion shaft 505 and insert the locking insertion shaft 505 into the first jack 501 and the second jack to fix the spline shaft 500 and the spline groove 503, so as to avoid detachment during use. Then, the personnel can connect the lower nail rod 300 to the bottom end of the upper nail rod 200 in the same way. At this time, the bone nail can be assembled, and then the medical staff can implant the bone nail into the patient's body. Embodiment

[0028] Refer to the appendix Figures 5-6 Referring to the appendix, compared with Embodiment 1, the difference in this embodiment is that a fixing support block 120 is further fixed at the outer surface top end of the upper bone nail head 110. A second top cap 130 is fixed on the outer wall of the fixing support block 120 away from the upper bone nail head 110. Positioning holes are penetrated and opened at the front and rear ends of the outer wall of the fixing support block 120. The positioning holes opened on the provided fixing support block 120 can install other bolts to ensure the stability of the bone nail fixed by the personnel. The fixing part is a threaded insertion shaft 510. A plurality of threaded insertion shafts 510 are respectively fixed at the center of the outer wall top ends of the upper nail rod 200 and the lower nail rod 300. Outer threaded rings 511 are fixed on the outer walls of the upper nail rod 200 and the lower nail rod 300 at the outer sides of the threaded insertion shafts 510. Inner threaded holes 512 are opened at the corresponding positions of the outer walls of the bottom ends of the upper bone nail head 110 and the upper nail rod 200 and the threaded insertion shafts 510. The outer wall of the threaded insertion shaft 510 is threadedly connected with the inner wall of the inner threaded hole 512. The provided inner threaded holes 512 are for threaded connection with the threaded insertion shafts 510. Outer threaded holes 513 are opened at the corresponding positions of the outer walls of the bottom ends of the upper bone nail head 110 and the upper nail rod 200 and the outer threaded rings 511. The outer threaded rings 511 are threadedly connected with the inner walls of the outer threaded holes 513. The provided outer threaded holes 513 are for threaded connection with the outer threaded rings 511. Through the two sets of threaded connections provided, the stability of the assembled upper bone nail head 110, upper nail rod 200 and lower nail rod 300 is ensured, and the situation of detachment is avoided.

[0029] The usage process of the present utility model is as follows: Among those skilled in the art, first, the personnel can judge the required length of the bone nail according to the patient's condition and bone structure, then select an upper nail rod 200 with a suitable size, and then rotate and insert the threaded insertion shaft 510 fixed at the upper end of the upper nail rod 200 into the internal threaded hole 512 opened at the bottom end of the upper bone nail head 110, and make the external thread ring 511 rotate and insert into the external threaded hole 513. In this way, the upper bone nail head 110 can be fixed to the top end of the upper nail rod 200, avoiding detachment during use. Then, the personnel can connect the lower nail rod 300 to the bottom end of the upper nail rod 200 in the same way. At this time, the bone nail can be assembled. Then, the medical staff can implant the bone nail into the patient's body.

[0030] The above are only the preferred embodiments of the present utility model. Any person skilled in the art may modify the present utility model by using the technical solutions described above or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present utility model falls within the scope of protection required by the present utility model.

Claims

1. An adjustable fixed bone nail, comprising an upper bone nail head (110), characterized in that: The bottom end of the upper bone nail head (110) is connected to an upper nail rod (200). One end of the outer wall of the upper nail rod (200) far from the upper bone nail head (110) is connected to a lower nail rod (300). The upper bone nail head (110), the upper nail rod (200), and the lower nail rod (300) are connected by a fixing component.

2. The adjustable fixed bone nail according to claim 1, wherein: A first nail cap (100) is integrally fixed to the top end of the outer wall of the upper bone nail head (110). A bone nail tip (400) is integrally fixed to the outer wall of the lower nail rod (300) on the side far from the upper nail rod (200).

3. The adjustable fixed bone nail according to claim 1, wherein: A fixing support block (120) is further fixed to the top end of the outer surface of the upper bone nail head (110). A second top cap (130) is fixed to the outer wall of the fixing support block (120) on the side far from the upper bone nail head (110). Positioning holes are penetrated through the front and rear ends of the outer wall of the fixing support block (120).

4. The adjustable fixed bone nail according to claim 1, characterized in that: The fixing component is a spline shaft (500). The spline shaft (500) is fixed to the top ends of the outer walls of the upper nail rod (200) and the lower nail rod (300). Fixing pin shafts (502) are fixed to the top ends of the outer walls of the upper nail rod (200) and the lower nail rod (300) and on the outer side of the spline shaft (500).

5. The adjustable fixed bone nail according to claim 4, wherein: Multiple fixing pin shafts (502) are evenly arranged in a circular array. Spline grooves (503) are opened at the corresponding positions of the bottom ends of the outer walls of the upper bone nail head (110) and the upper nail rod (200) and corresponding to the spline shaft (500). The outer wall of the spline shaft (500) is in spline connection with the inner wall of the spline groove (503).

6. The adjustable fixed bone nail according to claim 5, characterized in that: Fixing pin holes (504) are opened at the corresponding positions of the bottom ends of the outer walls of the upper bone nail head (110) and the upper nail rod (200) and corresponding to the fixing pin shafts (502). Magnetic attraction blocks are fixed to the inner walls of the fixing pin holes (504). The outer walls of the fixing pin shafts (502) are slidably connected to the inner walls of the fixing pin holes (504). The fixing pin shafts (502) are magnetically connected to the magnetic attraction blocks.

7. The adjustable fixed bone nail according to claim 5, wherein: A first insertion hole (501) is penetrated through the side end of the outer wall of the spline shaft (500). Second insertion holes are opened at the corresponding positions of the outer walls of the upper bone nail head (110) and the upper nail rod (200) and corresponding to the first insertion hole (501). The first insertion hole (501) and the second insertion holes are connected by a locking insertion shaft (505).

8. The adjustable fixed bone nail according to claim 1, characterized in that: The fixing component is a threaded insertion shaft (510). Multiple threaded insertion shafts (510) are respectively fixed to the centers of the top ends of the outer walls of the upper nail rod (200) and the lower nail rod (300). Outer threaded rings (511) are fixed to the top ends of the outer walls of the upper nail rod (200) and the lower nail rod (300) and on the outer side of the threaded insertion shaft (510).

9. The adjustable fixed bone nail according to claim 8, wherein: An internal threaded hole (512) is provided at the bottom end of the outer wall of the upper bone nail head (110) and the upper nail rod (200) and at a position corresponding to the threaded insertion shaft (510). The outer wall of the threaded insertion shaft (510) is threadedly connected to the inner wall of the internal threaded hole (512). An external threaded hole (513) is provided at the bottom end of the outer wall of the upper bone nail head (110) and the upper nail rod (200) and at a position corresponding to the external threaded ring (511). The external threaded ring (511) is threadedly connected to the inner wall of the external threaded hole (513).

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